Historic Pacific Northwest Heatwave of 2021

[Roger Smith]

1 hour ago, TimB84 said:

hopefully they have a different person keeping the records today than they did in 1898. He may be long gone, but his legacy still stands in the form of a record that is possibly not legitimate.

Here's a thought about 1898, they made no organized efforts to fight wild fires back then, and Pendleton is just to the west of a complex of hills and mountains with forests and open woodland areas that even today have high rates of wild fire starts (they probably don't spread into huge conflagrations as they used to do). So I wonder if it's possible that such an event in 1898 created a firestorm and outflow winds that might have advected at least 5 F additional heat. 

Just in more general terms, what would be the NWS policy on a temperature that was evidently boosted by a very close encounter with a wildfire in the vicinity? Sooner or later it would happen, if it hasn't already happened. Temperatures within firestorms are known to be several hundred degrees and if you have 30-50 mph winds flowing out of these fires, it stands to reason that some increase would be seen miles away from the burn zone. (the smoke certainly travels a lot further|)

[Roger Smith]

Marine layers spreading into Puget Sound, Fraser valley and Columbia valley (Cascades being the limit so far), keeping temperatures more moderate in coastal locations so far today. Roasting heat continues further inland though.

Looks like a worse situation may develop, we can take the heat for a few days but if dry thunderstorms erupt along the weak frontal boundaries depicted for Thursday to Sunday, then forest fires are sure to follow. They may not need to be entirely dry, rainfalls of .10" or so have very little effect with numerous lightning strikes over forested areas, and that is typical of our climate. The July 1941 heat wave ended with similar sporadic thunderstorms and limited amounts of rain. 

[MN Transplant]

Winds are awful light in eastern WA/OR.  Hard to get to state record territory without a good downslope component.  113/114 right now for the hot spots.

[bdgwx]

1 hour ago, donsutherland1 said:

Here’s weather historian Christopher Burt’s blog on the Death Valley temperatures:

https://www.wunderground.com/blog/weatherhistorian/an-investigation-of-death-valleys-134f-world-temperature-record.html

William Reid is partnering with Chris Burt on this. Reid's blog has a lot more information and is up-to-date through 2020. It is my understanding that they are (or were) preparing a publication to be submitted to WMO. I am unsure of the status on that. I do know this isn't the first time Burt has gotten a record dismissed by the WMO so he's no stranger to the process.

http://stormbruiser.com/chase/2020/11/23/death-valleys-134f-record-temperature-study-part-one/

[bluewave]

Christopher Burt also did an analysis on the Oregon record high temperature.

https://web.archive.org/web/20151012131142/http://www.wunderground.com/blog/weatherhistorian/comment.html?entrynum=19

OREGON RECORD HIGH TEMPERATURE

The record high for the state of Oregon has long been accepted as 119°F at Pendleton on Aug. 10, 1898. The NCDC site also mentions a similar reading at Prineville on July 29, 1898). First off, the Prineville reading can be dismissed immediately as unbelievable. Prineville is located in the center of the state near Redmond and Bend at an altitude of 2,860’. It is not a particularly warm location and its hottest temperature in modern records is just 107°F. There were many suspicious temperatures from Prineville during the summer of 1898.

The Pendleton reading is more difficult to dismiss. Pendleton is located on a river plain about 30 miles south of the Columbia River. This valley is the hottest area in the state with 100°F+ temperatures common every summer. An undisputed temperature of 117°F has been measured at nearby Umatilla, Oregon on July 27, 1939. The problem with the Pendleton reading is that it was an estimated not measured reading and it would seem that estimated temperatures should probably not be considered official, especially for something as significant as a state weather record.

According to the newspaper East Oregonian a report on Aug. 11, 1898 stated “…the government thermometer is only calculated to 115°, so that the 4° indicated above that had to be measured (estimated) by an observer.” This story is recounted in The Oregon Weather Book: A State of Extremes (p.64) by George H. Taylor and Raymond R. Hatton, Oregon State University Press, 1999.

[lookingnorth]

18 hours ago, donsutherland1 said:

Weather summary
for British Columbia
issued by Environment Canada
at 5:36 p.m. PDT Monday 28 June 2021.

Discussion.

The following data is preliminary and will be updated later tonight 

The following areas will have set a daily maximum temperature record 
on June 28, 2021: 

Abbotsford Area (Abbotsford A) 
Preliminary new record of 42.9 
Old record of 32.4 set in 2008 
Records in this area have been kept since 1944 

Dawson Creek Area (Dawson Creek A) 
Preliminary new record of 38.1 
Old record of 27.8 set in 2015 
Records in this area have been kept since 1926 

Gibsons Area (Sechelt Aut) 
Preliminary new record of 40.1 
Old record of 29.6 set in 2008 
Records in this area have been kept since 1949 

 

Looks like some places broke their daily records by over 10°C!

[TimB]

Pendleton and Hermiston, Oregon are both up to 117. This discussion about 117 vs. 119 could be moot soon.

[MN Transplant]

This is an extension of the table that I referred to yesterday.  The right column is the 5 minute ob possibilities.  You can see that the way they do the rounding, some numbers aren't possible except for on the hourly obs.

So, given this, here are some of today's leaders:

Pendelton, OR:  116/117

Hermiston, OR:  117 on the ob

Lewiston, ID:  114/115

Ephrata, WA:  116/117 (likely 116 given it was one ob)

Walla Walla, WA:  116/117

Richland, WA:  116

 

 

[raindancewx]

The Omega Block giveth and it taketh away. Looks like the high was 66 here. That's the coldest high on record, tied with 7/15/1968 for the 1892-2021 period centered on 7/1, i.e. 6/16-7/15.

Edit: 67 for a hot minute. Still very close to all-time record cold. Coldest high since 1997 for a June day.

[MN Transplant]

Hermiston to 118.

[bluewave]

 

 

[Roger Smith]

The other thing about PDT is the weather station is now at an airport and in 1898 could have been at a hotter location in the town or lower down in elevation. However we may as well get some 120 readings in this heat wave to end the debate. With those Prineville readings once again I would raise the question of wildfire heat release, that location is near the center of Oregon's logging industry (it is now the center of the tire industry with a major company's shipping facilities located there, important enough to get a new state highway built to connect existing highways). 

We have been told by media and experts that the wildfire situation is getting worse, which is probably true when comparing modern conditions to the 1951-80 reference period but if you go back further then we're talking about frequent uncontrolled blazes, historical accounts from southern interior of BC talk about widespread forest fires and smoke in the 1920s for example (and that was not a particularly warm decade, but they just weren't organized to fight forest fires back in those days, once they started, they burned through everything in their path until the fall rains put them out). 

[MN Transplant]

6 hourlies

Walla Walla, WA:  116

Ephrata, WA:  116

Omak, WA:  117

Richland, WA:  117

Hermiston, OR:  118

Pendelton, OR:  117

Lewiston, ID:  115

 

[Roger Smith]

I would explain the Lytton increase as the marine front forcing all the hot air out of the central Fraser valley downstream, and through the canyon. The marine front has pushed past Abbotsford now but it has been around 105-110 F in that lower elevation for two days, so forcing that air upslope is likely to compress it, then Lytton is at a slightly lower elevation than much of the canyon so it gains some heat coming out of there. May also be all the journalists in town revving their engines to see if the locals will come out of their a/c homes for interviews. "What's it like to live in Canada's hottest town?" 

Sort of like asking what's it like to be Liechtenstein's greatest footballer. 

[TimB]

Looks like Hermiston broke the real record of 117 but not the probably fake record of 119. Richland, WA got to at least 118.

[donsutherland1]

Weather summary
for British Columbia
issued by Environment Canada
at 5:58 p.m. PDT Tuesday 29 June 2021.

Discussion.

This is a preliminary summary. The values may be updated near 
midnight as required. 

The historic heatwave continues to shatter records across the 
province. 

The following area has set the Canadian daily maximum temperature 
record was set on June 29, 2021. 

Lytton Area (Lytton RCS) 
Preliminary new Canadian record of 49.6 
Old record of 45.0 set in 1937 at Yellow Grass and Midale, SK 

The following areas will have set a daily maximum temperature record 
on June 29, 2021: 

Agassiz Area (Agassiz RCS) 
Preliminary new record of 35.6 
Old record of 34.1 set in 2008 
Records in this area have been kept since 1889 

Bella Bella Area (Bella Bella) 
Preliminary new record of 32.6 
Old record of 25.0 set in 1995 
Records in this area have been kept since 1977 

Bella Coola Area (Bella Coola Airport) 
Preliminary new record of 36.1 
Old record of 32.7 set in 1995 
Records in this area have been kept since 1895 

Blue River Area (Blue River CS) 
Preliminary new record of 39.6 
Old record of 35.3 set in 2008 
Records in this area have been kept since 1946 

Burns Lake Area (Burns Lake Decker Lake) 
Preliminary new record of 36.6 
Old record of 30.6 set in 1987 
Records in this area have been kept since 1949 

Cache Creek Area (Ashcroft) 
Preliminary new record of 47.4 
Old record of 36.6 set in 2016 
Records in this area have been kept since 1944 

Clearwater Area (Clearwater Auto) 
Preliminary new record of 44.7 
Old record of 36.5 set in 2008 
Records in this area have been kept since 1913 

Clinton Area (Clinton RCS) 
Preliminary new record of 41.8 
Old record of 33.0 set in 2008 
Records in this area have been kept since 1974 

Comox Area (Comox A) 
Preliminary new record of 33.6 
Old record of 31.2 set in 1987 
Records in this area have been kept since 1914 

Cranbrook Area (Cranbrook A) 
Preliminary new record of 40.1 
Old record of 35.2 set in 2008 
Records in this area have been kept since 1901 

Creston Area (Creston Campbell Scientific) 
Preliminary new record of 41.4 
Old record of 35.7 set in 2008 
Records in this area have been kept since 1912 

Cassiar Area (Jade City Highway) 
Preliminary new record of 27.5 
Old record of 23.5 set in 1987 
Records in this area have been kept since 1954 

Dawson Creek Area (Dawson Creek A) 
Preliminary new record of 38.8 
Old record of 30.2 set in 2015 
Records in this area have been kept since 1926 

Duncan Area (North Cowichan Auto) 
Preliminary new record of 34.7 
Old record of 34.4 set in 1951 
Records in this area have been kept since 1913 

Fort Nelson Area (Fort Nelson) 
Preliminary new record of 35.7 
Old record of 33.5 set in 2015 
Records in this area have been kept since 1937 

Fort St. John Area (Fort St. John A) 
Preliminary new record of 38.1 
Old record of 30.5 set in 2015 
Records in this area have been kept since 1910 

Golden Area (Golden Airport) 
Preliminary new record of 38.5 
Old record of 36.1 set in 1937 
Records in this area have been kept since 1902 

Grand Forks Area (Grand Forks Forestry) 
Preliminary new record of 45.0 
Old record of 37.5 set in 2008 
Records in this area have been kept since 1911 

Kamloops Area (Kamloops A) 
Preliminary new record of 47.3 
Old record of 39.1 set in 2008 
Records in this area have been kept since 1890 

Kelowna Area (Kelowna UBCO) 
Preliminary new record of 45.2 
Old record of 39.2 set in 2008 
Records in this area have been kept since 1899 

Lillooet Area (Lillooet) 
Preliminary new record of 46.7 
Old record of 39.2 set in 2008 
Records in this area have been kept since 1917 

Lytton Area (Lytton RCS) 
Preliminary new record of 49.6 
Old record of 40.0 set in 2008 
Records in this area have been kept since 1921 

Mackenzie Area (Mackenzie Airport Auto) 
Preliminary new record of 38.7 
Old record of 31.5 set in 2015 
Records in this area have been kept since 1971 

Merritt Area (Merritt) 
Preliminary new record of 44.5 
Old record of 37.0 set in 2008 
Records in this area have been kept since 1918 

Nakusp Area (Nakusp CS) 
Preliminary new record of 38.1 
Old record of 34.8 set in 2008 
Records in this area have been kept since 1966 

Osoyoos Area (Osoyoos CS) 
Preliminary new record of 45.0 
Old record of 37.9 set in 2008 
Records in this area have been kept since 1954 

Pemberton Area (Pemberton Airport CS) 
Preliminary new record of 41.8 
Old record of 37.4 set in 2008 
Records in this area have been kept since 1908 

Penticton Area (Penticton A) 
Preliminary new record of 41.3 
Old record of 37.8 set in 2008 
Records in this area have been kept since 1907 

Port Hardy Area (Port Hardy A) 
Preliminary new record of 30.1 
Old record of 25.6 set in 1995 
Records in this area have been kept since 1944 

Powell River Area (Powell River) 
Preliminary new record of 34.1 
Old record of 30.6 set in 1951 
Records in this area have been kept since 1924 

Prince George Area (Prince George Airport Auto) 
Preliminary new record of 37.6 
Old record of 30.6 set in 1987 
Records in this area have been kept since 1912 

Princeton Area (Princeton CS) 
Preliminary new record of 44.0 
Old record of 37.6 set in 2008 
Records in this area have been kept since 1893 

Puntzi Mountain Area (Puntzi Mountain (AUT)) 
Preliminary new record of 39.8 
Old record of 32.2 set in 2008 
Records in this area have been kept since 1959 

Qualicum Beach Area (Qualicum Beach A) 
Preliminary new record of 32.5 
Old record of 29.7 set in 2015 
Records in this area have been kept since 1962 

Quesnel Area (Quesnel Airport Auto) 
Preliminary new record of 41.7 
Old record of 35.6 set in 1896 
Records in this area have been kept since 1893 

Salmon Arm Area (Salmon Arm CS) 
Preliminary new record of 39.0 
Old record of 36.1 set in 1924 
Records in this area have been kept since 1893 

Smithers Area (Smithers Airport Auto) 
Preliminary new record of 36.7 
Old record of 31.4 set in 1987 
Records in this area have been kept since 1938 

Sparwood Area (Sparwood CS) 
Preliminary new record of 37.6 
Old record of 32.8 set in 2008 
Records in this area have been kept since 1969 

Squamish Area (Squamish Airport) 
Preliminary new record of 38.4 
Old record of 35.3 set in 2008 
Records in this area have been kept since 1960 

Summerland Area (Summerland CS) 
Preliminary new record of 42.6 
Old record of 37.0 set in 2008 
Records in this area have been kept since 1907 

Tatlayoko Lake Area (Tatlayoko Lake RCS) 
Preliminary new record of 39.6 
Old record of 30.0 set in 1987 
Records in this area have been kept since 1930 

Terrace Area (Terrace A) 
Preliminary new record of 32.7 
Old record of 31.7 set in 1987 
Records in this area have been kept since 1912 

Trail Area (Warfield RCS) 
Preliminary new record of 43.9 
Old record of 35.5 set in 2016 
Records in this area have been kept since 1928 

Vancouver Area (Vancouver Intl A) 
Preliminary new record of 32.4 
Old record of 28.6 set in 1995 
Records in this area have been kept since 1896 

Vernon Area (Vernon Auto) 
Preliminary new record of 44.2 
Old record of 38.8 set in 2008 
Records in this area have been kept since 1900 

Whistler Area (Whistler - Nesters) 
Preliminary new record of 42.9 
Old record of 34.9 set in 1987 
Records in this area have been kept since 1950 

White Rock Area (White Rock Campbell Scientific) 
Preliminary new record of 29.3 
Old record of 29.2 set in 1995 
Records in this area have been kept since 1929 

Williams Lake Area (Williams Lake A) 
Preliminary new record of 39.4 
Old record of 30.9 set in 2008 
Records in this area have been kept since 1960 

Yoho (National Park) Area (Yoho Park) 
Preliminary new record of 36.7 
Old record of 30.6 set in 1937 
Records in this area have been kept since 1923 

Note: the temperature records reported here have been derived from a 
selection of historical stations in each geographic area that were 
active during the period of record.

Please note that this summary may contain preliminary or unofficial 
information and does not constitute a complete or final report.

End/PSPC

[donsutherland1]

000
NOUS46 KOTX 300126
PNSOTX
IDZ001>004-026-027-WAZ031>038-041>044-301326-

Public Information Statement
National Weather Service Spokane WA
626 PM PDT Tue Jun 29 2021

...PRELIMINARY HIGH TEMPERATURE REPORTS...

Location                     Temp      Time/Date       Provider

...Idaho...

...Benewah County...
St. Maries                   105 F     0200 PM 06/29   CWOP
Fernwood                     105 F     0350 PM 06/29   CWOP

...Bonner County...
3.5 NE Kootenai (UPR)        110 F     0503 PM 06/29   MESOWEST
Hoodoo                       109 F     0308 PM 06/29   RAWS
Priest Lake                  108 F     0308 PM 06/29   RAWS
Priest River                 108 F     0430 PM 06/29   CWOP
Sandpoint                    107 F     0504 PM 06/29   CWOP
5.6 NE Spirit Lake (UPR)     106 F     0326 PM 06/29   MESOWEST
Sandpoint                    106 F     0516 PM 06/29   CWOP
Sandpoint Airport            104 F     0555 PM 06/29   AWOS
Priest River                 103 F     0432 PM 06/29   CWOP
Sagle                        103 F     0503 PM 06/29   CWOP
4.7 NE Laclede (UPR)         101 F     0549 PM 06/29   MESOWEST

...Boundary County...
Naples                       110 F     0506 PM 06/29   CWOP
Moyie Springs                107 F     0417 PM 06/29   CWOP
Bonners Ferry                107 F     0508 PM 06/29   RAWS
3 NNE Bonners Ferry          106 F     0520 PM 06/29   AWS
Saddle Pass                  105 F     0207 PM 06/29   RAWS
Boundary County Airport      104 F     0555 PM 06/29   AWOS
Meadow Creek (UPR)           102 F     0321 PM 06/29   MESOWEST
Naples (UPR)                 102 F     0534 PM 06/29   MESOWEST

...Kootenai County...
Coeur D Alene Airport        109 F     0456 PM 06/29   AWOS
Post Falls                   108 F     0435 PM 06/29   CWOP
Rathdurm                     108 F     0450 PM 06/29   CWOP
Coeur d Alene                108 F     0540 PM 06/29   CWOP
Foothill Ranch 2             107 F     0331 PM 06/29   CWOP
Athol                        107 F     0338 PM 06/29   CWOP
Dalton Gardens               107 F     0349 PM 06/29   AWS
Rathdrum                     107 F     0350 PM 06/29   CWOP
2.5 SE Rathdrum (UPR)        106 F     0315 PM 06/29   MESOWEST
Coeur D Alene                106 F     0346 PM 06/29   CWOP
Harrison                     106 F     0446 PM 06/29   CWOP
Post Falls                   106 F     0501 PM 06/29   CWOP
Athol                        106 F     0530 PM 06/29   CWOP
Spirit Lake                  105 F     0316 PM 06/29   CWOP

...Latah County...
5.7 SW Clarkia (SNOTEL)      109 F     0400 PM 06/29   MESOWEST
Shock                        108 F     0210 PM 06/29   RAWS
Potlatch                     108 F     0211 PM 06/29   RAWS
Troy                         105 F     0330 PM 06/29   CWOP
Linden                       105 F     0512 PM 06/29   CWOP
Moscow                       104 F     0535 PM 06/29   CWOP
Moscow                       100 F     0545 PM 06/29   CWOP

...Lewis County...
Mission Creek                103 F     0203 PM 06/29   RAWS
Craigmont                    102 F     0445 PM 06/29   CWOP

...Nez Perce County...
Lapwai                       117 F     0219 PM 06/29   CWOP
Lewiston Airport             115 F     0456 PM 06/29   ASOS
Lenore                       114 F     0356 PM 06/29   CWOP
6.1 E Waha                   110 F     0130 PM 06/29   HADS
Corral Creek                 110 F     0349 PM 06/29   RAWS
Lewiston                     107 F     0359 PM 06/29   CWOP
3.5 SW Lapwai                107 F     0430 PM 06/29   HADS
Reubens                      100 F     0516 PM 06/29   CWOP

...Shoshone County...
Lines Creek                  108 F     1208 PM 06/29   RAWS
Nuckols                      102 F     0408 PM 06/29   RAWS
12.8 S Avery (SNOTEL)        100 F     0300 PM 06/29   MESOWEST

...Washington...

...Adams County...
11.9 N Benge (UPR)           116 F     0318 PM 06/29   MESOWEST
Washtucna West               115 F     0415 PM 06/29   WSUAGMET
Washtucna (WA DOT)           115 F     0440 PM 06/29   MESOWEST
3.0 NE Lind (SCAN)           114 F     0300 PM 06/29   MESOWEST
1.5 SW Ritzville (WA DOT)    114 F     0313 PM 06/29   MESOWEST
4.4 NE Cunningham (AGRIMET)  114 F     0500 PM 06/29   MESOWEST
Lind                         114 F     0500 PM 06/29   WSUAGMET
10 NE Warden                 114 F     0510 PM 06/29   AWS
2.0 E Othello (WA DOT)       114 F     0515 PM 06/29   MESOWEST
Washtucna / Hooper           113 F     0215 PM 06/29   CWOP
Othello                      113 F     0429 PM 06/29   RAWS
Hatton                       113 F     0500 PM 06/29   WSUAGMET
Ritzville                    112 F     0500 PM 06/29   WSUAGMET
7 NW Ritzville               110 F     0445 PM 06/29   AWS

...Asotin County...

5.6 W Clarkston Heights (AGR 114 F     0300 PM 06/29   MESOWEST
11 NW Anatone                109 F     0350 PM 06/29   AWS
Anatone                      105 F     0430 PM 06/29   WSUAGMET
6.1 SE Peola (SNOTEL)        100 F     0400 PM 06/29   MESOWEST

...Chelan County...
3.6 SE Ardenvoir             119 F     0130 PM 06/29   HADS
1.2 S Peshastin              119 F     0345 PM 06/29   HADS
Cashmere                     118 F     0529 PM 06/29   AWS
1.0 NW Cashmere (WA DOT)     117 F     0400 PM 06/29   MESOWEST
Wenatchee                    117 F     0439 PM 06/29   CWOP
WSU TFREC                    116 F     0445 PM 06/29   WSUAGMET
Wenatchee                    116 F     0515 PM 06/29   CWOP
Wenatchee                    116 F     0515 PM 06/29   CWOP
1.2 SE Peshastin (WA DOT)    116 F     0525 PM 06/29   MESOWEST
5.3 E Chelan (WA DOT)        115 F     0535 PM 06/29   MESOWEST
Azwell                       114 F     0530 PM 06/29   WSUAGMET
6.7 S Manson (WA DOT)        114 F     0546 PM 06/29   MESOWEST
Entiat                       113 F     0435 PM 06/29   CWOP
Malaga                       113 F     0445 PM 06/29   WSUAGMET
1 E Cashmere                 113 F     0455 PM 06/29   AWS
Leavenworth                  113 F     0501 PM 06/29   CWOP
4.6 N Winton                 112 F     0145 PM 06/29   HADS
Cashmere                     112 F     0230 PM 06/29   HADS
Entiat                       111 F     0435 PM 06/29   RAWS
4 ENE Chelan                 111 F     0544 PM 06/29   AWOS
1.9 S Leavenworth            109 F     0100 PM 06/29   HADS
Cashmere.N                   109 F     0345 PM 06/29   WSUAGMET
Leavenworth                  109 F     0425 PM 06/29   CWOP
Chelan South                 109 F     0530 PM 06/29   WSUAGMET
Camp 4                       108 F     0326 PM 06/29   RAWS
Boyd.Dist                    108 F     0500 PM 06/29   WSUAGMET
Stehekin-Airstrip            108 F     0501 PM 06/29   RAWS
Waowf Qd 1705                108 F     0524 PM 06/29   RAWS
Chelan                       108 F     0547 PM 06/29   CWOP
Winton (WA DOT)              107 F     0302 PM 06/29   MESOWEST
Wenatchee Heights            107 F     0330 PM 06/29   WSUAGMET
Plain                        106 F     0146 PM 06/29   CWOP
3 NE Chelan                  106 F     0405 PM 06/29   AWS
6.3 NW Ardenvoir  (R2)  (R2) 106 F     0445 PM 06/29   HADS
2.6 NE Manson (AGRIMET)      106 F     0500 PM 06/29   MESOWEST
4 ESE Telma                  106 F     0529 PM 06/29   WXFLOW
Leavenworth                  105 F     0100 PM 06/29   MESOWEST
Leavenworth                  105 F     0532 PM 06/29   CWOP
Dry Creek                    104 F     0337 PM 06/29   RAWS
1.2 NE Leavenworth           103 F     1245 PM 06/29   HADS
Waowf Qd 1702                103 F     0130 PM 06/29   RAWS
Trinity                      103 F     0403 PM 06/29   CWOP
16.4 N Telma (SNOTEL)        102 F     0200 PM 06/29   MESOWEST
3.4 S Monitor                102 F     0445 PM 06/29   HADS
6.3 E Stevens Pass (NWAVAL)  101 F     0100 PM 06/29   MESOWEST
Viewpoint                    101 F     0504 PM 06/29   RAWS
4.3 W Telma                  101 F     0504 PM 06/29   HADS
7.8 N Sunnyslope             101 F     0520 PM 06/29   HADS

...Douglas County...
Sunrise                      116 F     0430 PM 06/29   WSUAGMET
1.9 SE Bridgeport (AGRIMET)  115 F     0500 PM 06/29   MESOWEST
Orondo                       115 F     0500 PM 06/29   WSUAGMET
Wenatchee Airport            114 F     0455 PM 06/29   ASOS
Brays.Land                   114 F     0500 PM 06/29   WSUAGMET
5.8 SE Rock Island (WA DOT)  114 F     0511 PM 06/29   MESOWEST
Wenatch.E                    111 F     0430 PM 06/29   WSUAGMET
Mansfield                    110 F     0335 PM 06/29   AWS
Douglas                      110 F     0448 PM 06/29   RAWS
8.0 W Electric City (WA DOT) 110 F     0450 PM 06/29   MESOWEST
5.4 N Mold (WA DOT)          110 F     0550 PM 06/29   MESOWEST
Mansfield NW                 108 F     0515 PM 06/29   WSUAGMET
Waterville North             106 F     0500 PM 06/29   WSUAGMET

...Ferry County...
10.3 NW Curlew  (R2)  (R2)   110 F     0515 PM 06/29   USGS
Curlew South                 110 F     0515 PM 06/29   WSUAGMET
Brown Mtn. Orchard           108 F     0456 PM 06/29   RAWS
Owl Mountain                 106 F     0356 PM 06/29   RAWS
4.8 W Republic (WA DOT)      105 F     0253 PM 06/29   MESOWEST
Lane Creek                   101 F     0358 PM 06/29   RAWS
Iron Mountain                101 F     0404 PM 06/29   RAWS

...Garfield County...
Pomeroy 30N                  115 F     0415 PM 06/29   CWOP
7.5 S Dusty (AGRIMET)        114 F     0200 PM 06/29   MESOWEST
Pomeroy                      108 F     0415 PM 06/29   CWOP
10.8 NE Peola (WA DOT)       106 F     0352 PM 06/29   MESOWEST

...Grant County...
Grand Coulee                 118 F     0555 PM 06/29   AWS
Saddle Mountain              117 F     0530 PM 06/29   RAWS
0.5 SE Soap Lake (WA DOT)    116 F     0345 PM 06/29   MESOWEST
Ephrata Airport              116 F     0453 PM 06/29   ASOS
Coulee City                  115 F     0315 PM 06/29   HADS
4.5 E Beverly                115 F     0515 PM 06/29   HADS
Grant County Airport         114 F     0452 PM 06/29   ASOS
8 S Marlin                   114 F     0510 PM 06/29   AWS
DesertAire                   114 F     0515 PM 06/29   WSUAGMET
5.0 W Quincy (WA DOT)        113 F     0244 PM 06/29   MESOWEST
7.7 N Beverly (WA DOT)       113 F     0445 PM 06/29   MESOWEST
Hartline South               113 F     0445 PM 06/29   WSUAGMET
Mae                          113 F     0515 PM 06/29   WSUAGMET
Mattawa                      113 F     0530 PM 06/29   WSUAGMET
Moses Lake                   112 F     0415 PM 06/29   WSUAGMET
2.3 W Mattawa (HMMN)         112 F     0430 PM 06/29   MESOWEST
Ephrata                      112 F     0430 PM 06/29   WSUAGMET
8.3 N Warden (WA DOT)        112 F     0445 PM 06/29   MESOWEST
Royal City East              112 F     0445 PM 06/29   WSUAGMET
3.7 SW George (WA DOT)       112 F     0545 PM 06/29   MESOWEST
Ephrata                      111 F     0416 PM 06/29   CWOP
10.1 N Royal City (AGRIMET)  110 F     0500 PM 06/29   MESOWEST
Warden.SW                    110 F     0530 PM 06/29   WSUAGMET
RoyalCty.W                   110 F     0530 PM 06/29   WSUAGMET
Frenchman                    109 F     0415 PM 06/29   WSUAGMET
RoyalSlope                   109 F     0530 PM 06/29   WSUAGMET
Wheeler                      109 F     0530 PM 06/29   WSUAGMET
George West                  107 F     0345 PM 06/29   WSUAGMET
Quincy                       103 F     0530 PM 06/29   WSUAGMET

...Lincoln County...
4.3 SW Miles (AGRIMET)       114 F     0500 PM 06/29   MESOWEST
Spring Canyon                114 F     0537 PM 06/29   RAWS
Grand Coulee                 113 F     0500 PM 06/29   CWOP
Spokane Blm 1                112 F     0409 PM 06/29   RAWS
3.5 SW Irby (AGRIMET)        112 F     0500 PM 06/29   MESOWEST
1.0 E Davenport              111 F     0330 PM 06/29   HADS
5.7 N Almira                 110 F     0245 PM 06/29   HADS
Harrington South             110 F     0415 PM 06/29   WSUAGMET
Almira                       107 F     0345 PM 06/29   WSUAGMET
Davenport                    106 F     0530 PM 06/29   WSUAGMET

...Okanogan County...
Omak                         117 F     0453 PM 06/29   ASOS
Oroville                     115 F     0441 PM 06/29   RAWS
East Oroville                115 F     0530 PM 06/29   WSUAGMET
Loomis Valley                114 F     0345 PM 06/29   WSUAGMET
Nespelem                     114 F     0357 PM 06/29   RAWS
Tonasket.S                   114 F     0415 PM 06/29   WSUAGMET
Arrowhead                    113 F     0345 PM 06/29   WSUAGMET
Pogue Flat                   113 F     0415 PM 06/29   WSUAGMET
Brewster                     113 F     0430 PM 06/29   CWOP
Malott                       113 F     0530 PM 06/29   WSUAGMET
Spectacle Lake               113 F     0547 PM 06/29   RAWS
2.6 E Methow                 112 F     0420 PM 06/29   HADS
Methow Valley                112 F     0455 PM 06/29   AWOS
Ncsb                         112 F     0506 PM 06/29   RAWS
Winthrop                     111 F     0340 PM 06/29   CWOP
2.8 NW Nespelem (WA DOT)     111 F     0351 PM 06/29   MESOWEST
Methow Valley                111 F     0535 PM 06/29   MESOWEST
5.1 SE Tonasket              110 F     0345 PM 06/29   HADS
1.9 SE Coulee Dam (AGRIMET)  110 F     0500 PM 06/29   MESOWEST
Winthrop                     110 F     0600 PM 06/29   CWOP
Winthrop                     110 F     0600 PM 06/29   CWOP
Twisp                        109 F     0410 PM 06/29   CWOP
2.3 N Okanogan (AGRIMET)     109 F     0500 PM 06/29   MESOWEST
Kramer                       109 F     0508 PM 06/29   RAWS
1.4 S Conconully             109 F     0530 PM 06/29   HADS
8.7 S Carlton                107 F     0410 PM 06/29   HADS
10.1 S Conconully            107 F     0450 PM 06/29   HADS
11.3 SE Tonasket             106 F     0405 PM 06/29   HADS
Winthrop  (R2)  (R2)  (R2)   106 F     0445 PM 06/29   HADS
13.4 NE Methow               106 F     0500 PM 06/29   HADS
Peony                        105 F     0306 PM 06/29   RAWS
8.2 S Conconully             104 F     0415 PM 06/29   HADS
Douglas Ingram Ridge         104 F     0506 PM 06/29   RAWS
5.3 N Methow                 102 F     0400 PM 06/29   HADS
Lost Lake                    102 F     0536 PM 06/29   RAWS
8.1 E Twisp                  101 F     0525 PM 06/29   HADS
Riverside                    100 F     0231 PM 06/29   CWOP
3.2 S Twisp                  100 F     0240 PM 06/29   HADS
2.1 E Wauconda (WA DOT)      100 F     0451 PM 06/29   MESOWEST

...Pend Oreille County...
Ione                         109 F     0544 PM 06/29   CWOP
1.3 NE Metaline Falls (WA DO 109 F     0554 PM 06/29   MESOWEST
Flowery Trail                108 F     0430 PM 06/29   RAWS
Deer Mountain                107 F     0356 PM 06/29   RAWS
Tacoma Creek                 107 F     0403 PM 06/29   RAWS
Teepee Seed Orchard          106 F     0453 PM 06/29   RAWS

...Spokane County...
1.7 SE Spokane (WA DOT)      115 F     0259 PM 06/29   MESOWEST
5.0 W 5 Mile (WA DOT)        114 F     0546 PM 06/29   MESOWEST
4.1 E Tyler (UPR)            114 F     0552 PM 06/29   MESOWEST
Colbert                      113 F     0402 PM 06/29   CWOP
Arcadia Orchards             113 F     0447 PM 06/29   RAWS
Spokane Felts Field          113 F     0453 PM 06/29   ASOS
Spokane                      113 F     0546 PM 06/29   CWOP
0.8 NE Spokane South Hill (W 112 F     0312 PM 06/29   MESOWEST
0.6 W Tyler (WA DOT)         112 F     0402 PM 06/29   MESOWEST
2.5 SE Plaza (WA DOT)        111 F     0241 PM 06/29   MESOWEST
Otis Orchards                111 F     0359 PM 06/29   CWOP
Deer Park Airport            111 F     0453 PM 06/29   ASOS
2.9 W Mead (WA DOT)          110 F     1150 AM 06/29   MESOWEST
Spokane                      110 F     0316 PM 06/29   CWOP
Chattaroy                    110 F     0429 PM 06/29   CWOP
Cheney                       110 F     0446 PM 06/29   CWOP
1.7 NW Liberty Lake (WA DOT) 110 F     0459 PM 06/29   MESOWEST
1.3 N Spangle (WA DOT)       109 F     0351 PM 06/29   MESOWEST
Spokane Intl Airport         109 F     0453 PM 06/29   ASOS
Fairchild AFB                109 F     0458 PM 06/29   AWOS
1 SE Four Lakes              108 F     0240 PM 06/29   AWS
TURNBULL NWR SPOKANE 17 SSW  108 F     0410 PM 06/29   HADS
Cheney                       108 F     0428 PM 06/29   RAWS
Spokane                      108 F     0449 PM 06/29   CWOP
Spokane                      108 F     0517 PM 06/29   CWOP
Spokane                      108 F     0533 PM 06/29   CWOP
Spokane                      107 F     0200 PM 06/29   CWOP
Fairfield                    107 F     0515 PM 06/29   WSUAGMET
Green.Blff                   106 F     0430 PM 06/29   WSUAGMET
Spokane Valley               106 F     0533 PM 06/29   CWOP
Spokane                      104 F     0545 PM 06/29   CWOP

...Stevens County...
Northport                    116 F     0355 PM 06/29   CWOP
2.4 SE Addy                  116 F     0415 PM 06/29   HADS
Kettle Falls                 114 F     0337 PM 06/29   RAWS
Nine Mile Falls              113 F     0301 PM 06/29   CWOP
Kettle Falls                 113 F     0530 PM 06/29   CWOP
Little Pend Oreille Nwr      112 F     0428 PM 06/29   RAWS
Nine Mile Falls              112 F     0516 PM 06/29   CWOP
Wellpinit                    111 F     0508 PM 06/29   RAWS
Nine Mile Falls              110 F     0450 PM 06/29   CWOP
3 NE Springdale              110 F     0505 PM 06/29   AWS
Colville                     110 F     0547 PM 06/29   CWOP
1.8 S Springdale (AGRIMET)   109 F     0500 PM 06/29   MESOWEST
Addy                         109 F     0500 PM 06/29   WSUAGMET
Colville                     109 F     0555 PM 06/29   AWOS
2.4 SE Loon Lake (WA DOT)    108 F     0248 PM 06/29   MESOWEST
Pal Moore Orchard            108 F     0355 PM 06/29   RAWS
Deer Park                    108 F     0455 PM 06/29   CWOP
Deer Park                    108 F     0500 PM 06/29   CWOP
9 SSW Northport              108 F     0510 PM 06/29   AWS
Rice                         106 F     0438 PM 06/29   CWOP
3.1 W Kettle Falls (AGRIMET) 104 F     0200 PM 06/29   MESOWEST
Cedar Creek Orchard          103 F     0325 PM 06/29   RAWS
Big Blue                     103 F     0341 PM 06/29   RAWS

...Whitman County...
5.5 E Washtucna (UPR)        115 F     0423 PM 06/29   MESOWEST
Escure                       112 F     0341 PM 06/29   RAWS
LaCrosse                     112 F     0430 PM 06/29   WSUAGMET
Dusty (WA DOT)               110 F     0252 PM 06/29   MESOWEST
Pullman                      109 F     0552 PM 06/29   CWOP
Garfield                     107 F     0330 PM 06/29   CWOP
Garfield                     107 F     0351 PM 06/29   CWOP
1.4 S Uniontown (WA DOT)     106 F     0406 PM 06/29   MESOWEST
1 WNW Pullman                106 F     0430 PM 06/29   AWS
Pullman/Moscow Airport       106 F     0453 PM 06/29   ASOS
Colton                       105 F     0447 PM 06/29   CWOP
Pullman                      105 F     0500 PM 06/29   CWOP
Garfield East                105 F     0500 PM 06/29   WSUAGMET
4.6 SW Viola (SCAN)          103 F     0300 PM 06/29   MESOWEST

 

[Roger Smith]

There was some talk earlier about breaking records by large margins -- this is exactly what happened in Toronto during the 1936 heat wave. 

At that point, Toronto (downtown) had been running a weather station for 96 years. These were the records before and after the 1936 heat wave. 

I have added the hottest values since 1936 as in some cases those are now in second place. 

Date ____ previous record ____ 1936 _____ hottest since 1936

July 8 ___ 93 1876 ___________ 105 ______ 98 1988

July 9 ___ 94 1911 ___________ 105 ______ 96 1974

July 10 __ 91 1912 ___________ 105 ______ 98 1988

July 11 __ 95 1846 ____________ 96 ______ 93 1987, 2005

July 12 __ 92 1887, 1908 ______t 92 _____ 94 2005

July 13 __ 95 1845, 1921 ______100 _____ 94 2005

... also Dec 3 1982 at Toronto hit 68 F, the previous record was 58F in 1973, since 1982 the warmest on the date is also 58 (1998).

_________________________________________________________

Here are some examples of records blown away at NYC (period of record 1869-2021) by large margins ...

Apr 7, 1929 ___ 89 (previous record 75 1908) _ since broken once, 92 2010

May 19, 1962 __ 99 (previous record 88 1903) _ warmest since was 91 2017

Nov 1, 1950 ___ 84 (previous record 73 1927,29) _ warmest since was 81 1974

Dec 24, 2015 __ 72 (previous record 63 1990, 96)

___ these are comparable landmark record breakers that came to mind, in Britain I think 31 Oct 2014 broke previous marks by a similar margin. 

[lookingnorth]

1 hour ago, donsutherland1 said:

000
NOUS46 KOTX 300126
PNSOTX
IDZ001>004-026-027-WAZ031>038-041>044-301326-

Public Information Statement
National Weather Service Spokane WA
626 PM PDT Tue Jun 29 2021

...PRELIMINARY HIGH TEMPERATURE REPORTS...

Location                     Temp      Time/Date       Provider

...Idaho...
...Chelan County...
3.6 SE Ardenvoir             119 F     0130 PM 06/29   HADS
1.2 S Peshastin              119 F     0345 PM 06/29   HADS

 

If those 119's are verified, that would be a state record for Idaho, right?

[Roger Smith]

Part three of the NYC "hot week" study analyzing the top averages on a year by year basis. As with the highs where I reported in more detail, consecutive values for 3-4 days (representing 9-10 days elapsed time) may be quite similar. This list ranks the years by top daily values only. Then it compares the sample of years to those identified as hottest daytime and warmest overnight. 

In the table below, entry "a" refers to the rank of the same year in average 7d maximum and minimum temps, and entry "b" refers to the day shift (if any) between the seven day intervals involved (for mean and max only). A positive number in "b" means that the mean temp max occurred that number of days later than the avg max, and a negative means that it occurred earlier. Zero means that it was the same seven day interval. Where either statistic was on more than one day, the best fit is used but an asterisk will be added. As an example of how to read the table, 1993 (avg 87.43) has the highest seven day mean and also the third highest ranked average maximum and tied 11th warmest minimum (a). The two intervals were concurrent (with reference to the first part of the study, that interval is identified as July 7-13). If b had been entered as "1" then the reference would be to 8-14 July for the mean temperature. If a year failed to make top 48 in mean max or mean min, that entry would read blank or --- . The first example of that is 1991 (t12) which did not register a top 48 7-day average min and the value of 73.57 was a degree lower than 48th ranked values. 

Two cases are noted (1980, 1999) where the highest average minimum was in a different heat wave than the highest average max. It probably happens more frequently in average and cooler than average summers.

Even when the mean max and the mean daily align, the mean minimum peak may be displaced. This is why 2010 came in with a slightly lower mean than 1980 even though its ranks were both slightly better. The relevant ranked mean minimum was displaced one day later. 

 

Rank ____ Avg ____ Year ____ a _______ b ________ Rank ___ Avg _____ Year ____ a ______ b

_01 _____ 87.43 ___ 1993 ___ 3, t11 ___ 0 _________ 26 ____ 84.43 ___ 1911 ___25, t29 __0

_02 _____ 87.36 ___ 1977 ___ 1, t20 ___ 0 _________ 27 ____ 84.14 ___ 1917 ___t31, t29__0

_03 _____ 87.14 ___ 1953 ___ 2, t16 ___ 0* ________t28 ____ 84.07 ___ 1885 __ t39, t16 __4

_04 _____ 87.07 ___ 1896 ___t13, 2 ___ 0 _________ t28 ____ 84.07 ___ 1898 __ -----, t13 __0 ^^

_05 _____ 86.86 ___ 2013 ___ 23, 1 ___ 1 __________t30 ____ 84.00 ___ 1892 __ t31, t29__ 1

_06 _____ 86.79 ___ 2011 ___ t7, 4 ___ 0* _________ t30 ____ 84.00 ___ 2016 __ ----, t11 __ 1^^

_07 _____ 86.64 ___ 1988 ___ t11, 3 __ 0 __________ 32 ____ 83.86 ___ 1949 __  t44, -----__ 0

_08 _____ 85.86 ___ 1944 ___ 5, t37___1 __________ t33____ 83.79 ___ 1876 __ t49, t25 __ 1

_09 _____ 85.71 ___ 1955 ___ 6, t29 __ 0 __________ t33 ____83.79 ___ 1961 __ t44, t29 __ 0

_10 _____ 85.57 ___ 2001 ___ t11, 24__0 __________t33 ____ 83.79 ___ 1984 __ t39, t42 __ 0

_11 _____ 85.50 ___ 1980 __ t20, t22^_ 0 __________t36 ____83.64 ___ 1982 __ t53, t29 __ 0

t12 _____ 85.43 ___ 1973 ___ t7, t37 __ 0 __________t36 ____83.64 ___ 2018 __ -----, t29 __ 0

t12 _____ 85.43 ___ 1981 ___24, t13 __ 0 __________ 38 ____ 83.57___ 1940 __ t26, ----- __ 0

t12 _____ 85.43 ___ 1991 ___ 4, ----- ___ 0 __________t39 ____ 83.50___ 1872 __ t31, ----- __ 0

_15 _____ 85.36 ___ 2010 __ t13, t16__ 0 __________ t39 ____83.50___ 2005 __ t44, t29 __ 1

_16 _____ 85.29 ___ 2002 __ t22, t20 __0 __________t41 ____ 83.43___ 1937 __ 28, ----- ___ 0

_17 _____ 85.21^___1999 __ ----- 6 ____ 0 __________t41 ____ 83.43 ___ 1972 __ -----, t27 ___--1  

_18 _____ 85.14 ___ 1948 __ t15, t29 _ 0 __________t43 ____ 83.36 ___ 1905 __ -----, t8 ____ --5

t19 _____ 84.93 ___ 1901 ___10, t46 __0 __________t43 ____ 83.36 ___ 1908 __ ------, 5 ____ 0

t19 _____ 84.93 ___ 1983 __ t15, t42__ 0 __________t43 ____ 83.36 ___ 1936 __ t20, ----- ___ 0 

t19 _____ 84.93 ___ 1995 __ t29, 15 __ 0 __________ 46 ____ 83.21 ___ 1943 ___ t29, ---- ___ 0

t22 _____ 84.79 ___ 1952 __ t31, t16 _ 0 __________t47 ____ 83.07 ___ 1925 ___ t15, ---- ___ 0

t22 _____ 84.79^___ 1966 __ t7, ----- __ 1 __________t47 ____ 83.07___ 2008 ____t37, ---- ___ 1

_24 _____ 84.71 ___ 2006 __ t49, 7 ___0 __________ 49 ____ 82.86 ___ 1979 ____----, t22 ___--4

_25 _____ 84.50 ___ 1933 __ t15, ---- __0 __________ 50 ____ 82.71 ___ 1906 ____ ----, t8 ____ 0

___________ (min for 1933 74.0, about 0.5 below 48th) ____^^ 1898 mean max 91.14, all peaks Aug 31 to Sept 6 1898

______________ (min for 1923 in 31st also 74.0) ______________^^ 2016 was similar, max 91.14, mean peak Aug 11-17 2016

_________________________________________________________________________

* Highest mean for 1953 is same as second of two tied intervals for high max (that ending Sept 3). The value for Sept 2 is marginally lower.

* Highest mean for 2011 also same as second of two tied intervals for high max (that ending July 27). 

^ For the 1980 entry, the mean min for the heat wave with the average shown (July) was slightly lower than a second heat wave with a lower average max. For the heat wave noted, the mean min was 76.14 which ranks t22nd, but for a second heat wave in August which had a mean of 85.00 (Aug 5-11), the average min was 77.00 (also Aug 5-11) and the peak average max 93.57 (Aug 3-9) so the displacement for this one was 2 days, the ranks of the mean max and mean min were t29, 10. In 2002, the earlier noted portion had a mean of 84.79, slightly lower than the peak heat wave, and the minimum of 75.14 was likewise about a degree lower than the peak heat wave recorded. 

^ For the 1999 entry, the highest mean occurred in a separate non-qualifying (for mean max) heat wave 22-23 days before tied peaks for mean max later in the summer. The non-qualifying mean max for the overall mean shown was 93.00. This one combined with the 6th highest average minimum of 77.00. After three weeks of less prolific heat, a second heat wave set the qualifying 95.00 peak (t15th warmest) on two consecutive days (for seven day averages) but with that heat wave the corresponding mean min was 74.71 which ranks t45 with otherwise untied 1870 (about t47 for separate heat waves). So 1999 set the 15th warmest mean max and 6th warmest mean min, although three weeks apart, and had two ranking heat waves for mean temperature if that were the criteria for counting. 

^ For the 1966 entry, the highest min was slightly lower than 48th. A later portion of the extended heat wave as noted had a slightly lower value of mean minimum attached also. The mean for the second interval was 83.57 which was 1.22 below the main peak ten days earlier. This is not considered to be a separate heat wave but an extended portion of the qualifying case.

(notes about secondary peaks, in 1955 the earlier July sub-peak had a mean of 85.29 (zero days displacement relative to mean max) -- this would rank as 23rd highest heat wave mean temp and would combine equivalent t10 mean daytime max with equivalent t37 mean min (almost equal to the later main entry heat wave),  in 1953 the July heat wave (listed as 2b for mean max) had a mean of 83.50 displaced one day later than the mean max peak, and a mean minimum of 73.43 which would rank outside the top 48 by about one degree, while in 1988 the earlier July sub-peak had a mean of 82.79 five days after the mean max peak showing the longevity of that heat wave). This one would rank t27 for heat wave mean max, and its mean minimum finished well outside the top 48. 

The heat waves of 1905 to 1908 and also 1979 generally levelled off near 88-90F and had warmer ranked overnight lows in the 75-77 range, for unusually small diurnal ranges. This may indicate frequent sea breeze modification, or cloudiness.

_________________________________________

ANALYSIS of the frequency of hot average daily temp 7d intervals

This shows the ranks of each member of the five intervals in the study ... ranks of mean max and mean min in brackets. Almost all the heat waves produced overlapping intervals of peak mean max and mean min, sometimes there was a one-day lag and in a few cases longer displacements. The greater the displacement, the more the apparent error in the rank attained by the year's highest mean daily (since it has not been derived precisely from these ranked components). Two cases required that two heat waves during the year be re-ranked from the annual rankings as the high min and high max were in two different heat waves. In both cases the differentials are rather small and explained in the text above. 1980 is the highest ranked heat wave to have its mean minimum finish second to another heat wave during the summer (that one while cooler for max temps ranked 10th overall for mean min, its max component ranked the same as 29th annually).

n __ interval __ cases

6 __ 1869-1900 _ 1896 4th (t13, 2), 1885 t28 (t39, t16 ), 1898 t28 (---, t13), 1892 t30 (t31, t29),

____ 1876 t33 (t49, t25), 1872 t39 (t31, ---)

7 __ 1901-1930 _ 1901 t19 (10, t46), 1911 26th (25, t29), 1917  27th (t31, t29), 1905, t43 (---, t8),

_____ 1908, t43 (---, 5), 1925, t47 (t15, ---), 1906 50th (---, t8). 

11 _ 1931-1960 _ 1953 3rd (2, t16), 1944 8th (5, t37), 1955 9th (6, t29), 1948 18th (t15, t29), 1952 t22 (t31, t16),

_____1933 25th (t15, ---), 1949 32nd (t44, ---), 1940 38th (t26, ---), 1937  t41 (---, t27), 1936 t43 (t20, ---), 1943 46th (t29, ---). 

12 _ 1961-1990 _ 1977 2nd (1, t20), 1988 7th (t11, 3), 1980 11th (t20, t22), 1973 t12 (t7, t37), 1981 t12 (24, t13), 1983 t19 (t15, t42),

_____1966 t22 (t7, ---), 1961 t33 (t44, t29), 1984 t33 (t39, t42), 1982 t36 (t53, t29), 1972 t41 (---, t27), 1979 49th (---, t22). 

15 _ 1991-2020 _ 1993 1st (3, t11), 2013 5th (23, 1), 2011 6th (t7, 4), 2001 10th (t11, 24), 1991 t12 (4, ---),

_____ 2010 15th (t13, t16), 2002 16th (t22, t20), 1999 17th (----, 6), 1995 t19 (t29, 15), 2006 24th (t49, 7),

______2016 t30 (---, t11), 2018 t36 (--- t29), 2005  t39 (t44, t29), 2008 t47 (t37, ----). 

______________________________________________________________

The pace of these top 50 heat waves (average temp) has been gradually increasing but of the 15 in the most recent 30 years, about one-third are included mostly for their unusually warm nights. This was also the case in the earliest interval. The daytime highs dominated most around 1931-60.

 

 

[donsutherland1]

39 minutes ago, lookingnorth said:

If those 119's are verified, that would be a state record for Idaho, right?

Yes. That’s correct.

[TimB]

6 hours ago, lookingnorth said:

If those 119's are verified, that would be a state record for Idaho, right?

5 hours ago, donsutherland1 said:

Yes. That’s correct.

But isn’t Chelan County in Washington? Even so, 119 would still be a state record.

[donsutherland1]

45 minutes ago, TimB84 said:

But isn’t Chelan County in Washington? Even so, 119 would still be a state record.

I'm not sure where the airport is. You might be right.

[donsutherland1]

Environment Canada's summary of the most recent Canadian national record high temperature at Lytton, BC:

 

[donsutherland1]

Weather summary
for British Columbia
issued by Environment Canada
at 11:47 p.m. PDT Tuesday 29 June 2021.

Discussion.

The historic heat wave continues to shatter records across the 
province. 

The following area has set the Canadian daily maximum temperature 
record was set on June 29, 2021. 

Lytton Area (Lytton RCS) 
New Canadian record of 49.6 
Old record of 47.9 set in 2021 at Lytton, BC 

The following areas set a daily maximum temperature record on June 
29, 2021: 

Agassiz Area (Agassiz RCS) 
New record of 35.6 
Old record of 34.1 set in 2008 
Records in this area have been kept since 1889 

Bella Bella Area (Bella Bella) 
New record of 32.7 
Old record of 25.0 set in 1995 
Records in this area have been kept since 1977 

Bella Coola Area (Bella Coola Airport) 
New record of 36.1 
Old record of 32.7 set in 1995 
Records in this area have been kept since 1895 

Blue River Area (Blue River CS) 
New record of 39.6 
Old record of 35.3 set in 2008 
Records in this area have been kept since 1946 

Burns Lake Area (Burns Lake Decker Lake) 
New record of 36.6 
Old record of 30.6 set in 1987 
Records in this area have been kept since 1949 

Cache Creek Area (Ashcroft) 
New record of 48.1 
Old record of 36.6 set in 2016 
Records in this area have been kept since 1944 

Clearwater Area (Clearwater Auto) 
New record of 44.7 
Old record of 36.5 set in 2008 
Records in this area have been kept since 1913 

Clinton Area (Clinton RCS) 
New record of 41.8 
Old record of 33.0 set in 2008 
Records in this area have been kept since 1974 

Comox Area (Comox A) 
New record of 33.6 
Old record of 31.2 set in 1987 
Records in this area have been kept since 1914 

Courtenay Area (Comox A) 
New record of 33.6 
Old record of 31.2 set in 1987 
Records in this area have been kept since 1914 

Cranbrook Area (Cranbrook A) 
New record of 40.1 
Old record of 35.2 set in 2008 
Records in this area have been kept since 1901 

Creston Area (Creston Campbell Scientific) 
New record of 41.4 
Old record of 35.7 set in 2008 
Records in this area have been kept since 1912 

Dawson Creek Area (Dawson Creek A) 
New record of 38.9 
Old record of 30.2 set in 2015 
Records in this area have been kept since 1926 

Fort Nelson Area (Fort Nelson) 
New record of 36.3 
Old record of 33.5 set in 2015 
Records in this area have been kept since 1937 

Fort St. John Area (Fort St. John A) 
New record of 38.1 
Old record of 30.5 set in 2015 
Records in this area have been kept since 1910 

Gibsons Area (Sechelt Aut) 
New record of 31.8 
Old record of 31.2 set in 2008 
Records in this area have been kept since 1949 

Golden Area (Golden Airport) 
New record of 38.5 
Old record of 36.1 set in 1937 
Records in this area have been kept since 1902 

Kamloops Area (Kamloops A) 
New record of 47.3 
Old record of 39.1 set in 2008 
Records in this area have been kept since 1890 

Kelowna Area (Kelowna UBCO) 
New record of 45.7 
Old record of 39.2 set in 2008 
Records in this area have been kept since 1899 

Lillooet Area (Lillooet) 
New record of 46.8 
Old record of 39.2 set in 2008 
Records in this area have been kept since 1917 

Lytton Area (Lytton RCS) 
New record of 49.6 
Old record of 40.0 set in 2008 
Records in this area have been kept since 1921 

Mackenzie Area (Mackenzie Airport Auto) 
New record of 38.7 
Old record of 31.5 set in 2015 
Records in this area have been kept since 1971 

Merritt Area (Merritt) 
New record of 44.5 
Old record of 37.0 set in 2008 
Records in this area have been kept since 1918 

Nakusp Area (Nakusp CS) 
New record of 38.6 
Old record of 34.8 set in 2008 
Records in this area have been kept since 1966 

Osoyoos Area (Osoyoos CS) 
New record of 45.0 
Old record of 37.9 set in 2008 
Records in this area have been kept since 1954 

Pemberton Area (Pemberton Airport CS) 
New record of 41.8 
Old record of 37.4 set in 2008 
Records in this area have been kept since 1908 

Penticton Area (Penticton A) 
New record of 41.3 
Old record of 37.8 set in 2008 
Records in this area have been kept since 1907 

Port Hardy Area (Port Hardy A) 
New record of 30.1 
Old record of 25.6 set in 1995 
Records in this area have been kept since 1944 

Powell River Area (Powell River) 
New record of 34.3 
Old record of 30.6 set in 1951 
Records in this area have been kept since 1924 

Prince George Area (Prince George Airport Auto) 
New record of 37.6 
Old record of 30.6 set in 1987 
Records in this area have been kept since 1912 

Puntzi Mountain Area (Puntzi Mountain (AUT)) 
New record of 39.8 
Old record of 32.2 set in 2008 
Records in this area have been kept since 1959 

Quesnel Area (Quesnel Airport Auto) 
New record of 41.7 
Old record of 35.6 set in 1896 
Records in this area have been kept since 1893 

Revelstoke Area (Revelstoke Airport Auto) 
New record of 38.1 
Old record of 36.7 set in 1948 
Records in this area have been kept since 1898 

Salmon Arm Area (Salmon Arm CS) 
New record of 39.1 
Old record of 36.1 set in 1924 
Records in this area have been kept since 1893 

Sechelt Area (Sechelt Aut) 
New record of 31.8 
Old record of 31.2 set in 2008 
Records in this area have been kept since 1956 

Smithers Area (Smithers Airport Auto) 
New record of 36.7 
Old record of 31.4 set in 1987 
Records in this area have been kept since 1938 

Sparwood Area (Sparwood CS) 
New record of 37.6 
Old record of 32.8 set in 2008 
Records in this area have been kept since 1969 

Squamish Area (Squamish Airport) 
New record of 38.4 
Old record of 35.3 set in 2008 
Records in this area have been kept since 1960 

Summerland Area (Summerland CS) 
New record of 42.8 
Old record of 37.0 set in 2008 
Records in this area have been kept since 1907 

Tatlayoko Lake Area (Tatlayoko Lake RCS) 
New record of 39.6 
Old record of 30.0 set in 1987 
Records in this area have been kept since 1930 

Trail Area (Warfield RCS) 
New record of 43.9 
Old record of 35.5 set in 2016 
Records in this area have been kept since 1928 

Vancouver Area (Vancouver Intl A) 
New record of 32.4 
Old record of 28.6 set in 1995 
Records in this area have been kept since 1896 

Vernon Area (Vernon Auto) 
New record of 44.2 
Old record of 38.8 set in 2008 
Records in this area have been kept since 1900 

Whistler Area (Whistler - Nesters) 
New record of 42.9 
Old record of 34.9 set in 1987 
Records in this area have been kept since 1950 

White Rock Area (White Rock Campbell Scientific) 
New record of 29.3 
Old record of 29.2 set in 1995 
Records in this area have been kept since 1929 

Williams Lake Area (Williams Lake A) 
New record of 39.6 
Old record of 30.9 set in 2008 
Records in this area have been kept since 1960 

Yoho (National Park) Area (Yoho Park) 
New record of 36.7 
Old record of 30.6 set in 1937 
Records in this area have been kept since 1923 

Note: the temperature records reported here have been derived from a 
selection of historical stations in each geographic area that were 
active during the period of record.

Please note that this summary may contain preliminary or unofficial 
information and does not constitute a complete or final report.

End/PSPC

[TimB]

1 minute ago, donsutherland1 said:

I'm not sure where the airport is. You might be right.

I believe your post itself shows it as being in Washington. The specific locations (Ardenvoir and Peshastin) appear to be located in central Washington near Wenatchee.

[donsutherland1]

7 minutes ago, TimB84 said:

I believe your post itself shows it as being in Washington. The specific locations (Ardenvoir and Peshastin) appear to be located in central Washington near Wenatchee.

You are correct. My error. Those figures would be Washington State records.

[donsutherland1]

Weather summary
for Alberta
issued by Environment Canada
at 1:27 a.m. MDT Wednesday 30 June 2021.

Discussion.

As the historic heat wave continues in Alberta. 

The following areas set a daily maximum temperature record on June 
29, 2021. Temperatures in degrees celsius: 

Airdrie Area 
New record of 36.3 
Old record of 34.4 set in 1896 
Records in this area have been kept since 1881 

Athabasca Area 
New record of 35.5 
Old record of 30.0 set in 1950 
Records in this area have been kept since 1900 

Banff Area 
New record of 37.8 
Old record of 33.9 set in 1937 
Records in this area have been kept since 1887 

Beaverlodge Area 
New record of 40.7 
Old record of 30.6 set in 1924 
Records in this area have been kept since 1912 

Bow Island Area 
New record of 36.0 
Old record of 32.2 set in 2008 
Records in this area have been kept since 1961 

Bow Valley (Provincial Park) Area 
New record of 38.1 
Old record of 33.9 set in 1937 
Records in this area have been kept since 1928 

Breton Area 
New record of 35.5 
Old record of 31.0 set in 2003 
Records in this area have been kept since 1939 

Calgary Area 
New record of 36.3 
Old record of 34.4 set in 1896 
Records in this area have been kept since 1881 

Cardston Area 
New record of 35.0 
Old record of 34.4 set in 1937 
Records in this area have been kept since 1918 

Claresholm Area 
New record of 35.7 
Old record of 33.5 set in 2008 
Records in this area have been kept since 1951 

Cold Lake Area 
New record of 35.0 
Old record of 33.9 set in 1984 
Records in this area have been kept since 1952 

Drumheller Area 
New record of 39.3 
Old record of 37.8 set in 1937 
Records in this area have been kept since 1923 

Edmonton (int'l Aprt) Area 
New record of 33.2 
Old record of 30.1 set in 1978 
Records in this area have been kept since 1959 

Edson Area 
New record of 38.6 
Old record of 36.7 set in 1937 
Records in this area have been kept since 1916 

Elk Island (National Park) Area 
New record of 33.9 
Old record of 31.6 set in 2008 
Records in this area have been kept since 1966 

Esther Area 
New record of 35.7 
Old record of 32.5 set in 1989 
Records in this area have been kept since 1985 

Grande Prairie Area 
New record of 41.5 
Old record of 30.3 set in 2008 
Records in this area have been kept since 1922 

Hendrickson Creek Area 
New record of 38.1 
Old record of 29.5 set in 2008 
Records in this area have been kept since 1995 

High Level Area 
New record of 32.1 
Old record of 31.5 set in 1982 
Records in this area have been kept since 1962 

High River Area 
New record of 36.3 
Old record of 33.5 set in 2008 
Records in this area have been kept since 1913 

Highvale Area 
New record of 36.4 
Old record of 30.0 set in 1979 
Records in this area have been kept since 1977 

Jasper Area 
New record of 40.3 
Old record of 33.0 set in 2008 
Records in this area have been kept since 1916 

Lethbridge Area 
New record of 36.4 
Old record of 34.0 set in 1984 
Records in this area have been kept since 1902 

Mildred Lake Area 
New record of 34.9 
Old record of 32.2 set in 1979 
Records in this area have been kept since 1965 

Milk River Area 
New record of 34.7 
Old record of 33.6 set in 2015 
Records in this area have been kept since 1994 

Nordegg Area 
New record of 36.5 
Old record of 32.8 set in 1937 
Records in this area have been kept since 1915 

Peace River Area 
New record of 38.1 
Old record of 33.9 set in 1926 
Records in this area have been kept since 1907 

Pincher Creek Area 
New record of 33.6 
Old record of 32.2 set in 1896 
Records in this area have been kept since 1893 

Red Earth Creek Area 
New record of 38.4 
Old record of 33.3 set in 2015 
Records in this area have been kept since 1994 

Rocky Mountain House Area 
New record of 34.3 
Old record of 30.6 set in 1937 
Records in this area have been kept since 1915 

Slave Lake Area 
New record of 36.7 
Old record of 34.4 set in 1937 
Records in this area have been kept since 1922 

Stavely Area 
New record of 32.3 
Old record of 30.5 set in 1978 
Records in this area have been kept since 1914 

Stony Plain Area 
New record of 35.3 
Old record of 29.7 set in 2008 
Records in this area have been kept since 1966 

Strathmore Area 
New record of 35.5 
Old record of 34.4 set in 1937 
Records in this area have been kept since 1912 

Sundre Area 
New record of 34.8 
Old record of 31.3 set in 2008 
Records in this area have been kept since 1993 

Taber Area 
New record of 36.3 
Old record of 33.7 set in 2008 
Records in this area have been kept since 1947 

Wainwright Area 
New record of 36.4 
Old record of 35.5 set in 1984 
Records in this area have been kept since 1966 

Waterton Park Area 
New record of 33.4 
Old record of 30.7 set in 2008 
Records in this area have been kept since 1976 

Note: the temperature records reported here have been derived from a 
selection of historical stations in each geographic area that were 
active during the period of record.

Please note that this summary may contain preliminary or unofficial 
information and does not constitute a complete or final report.

End/PASPC

[tamarack]

An impressive list, with some otherworldly new records.  First place goes to Grande Prairie.  Halfway thru their 100th year of observations their all time high jumps by 20°F!  Beaverlodge area is right behind and several other locations broke their records by 10F or more.  Cra-zee!  (Seems more impressive in F than in C.  )

[bdgwx]

So the old Canadian record was 113F (45.0C) in 1937 and the new record is 121F (49.6C) in 2021. 

Let's say the recurrence interval on the 113F is 50 years and the mean annual Tmax is say 102F with a standard deviation of 5.4F for an annualized z-score of 2.0 (1-in-50 years). Using the mean of 102 +/- 5.4F (1-sigma) the annualized z-score on the 121F would be 3.5 (1-in-5,000 years).

Obviously that was just a back-of-the-envelope estimation without any hard data. I have no idea how far off that 102 +/- 5.4F figure is; could be a lot. If someone can supply the annual Canadian Tmax values we can compute the real mean and standard deviation and then just plug all of that into a z-score calculator and get the real recurrence interval for the 121F. My bet...the real recurrence interval from rigorous statistical analysis will be at least several hundred years and probably over a thousand and maybe even approaching the 5000 year figure I guesstimated above.