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July Discobs 2024


George BM
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SEVERE THUNDERSTORM WATCH OUTLINE UPDATE FOR WS 553
NWS STORM PREDICTION CENTER NORMAN OK
240 PM EDT WED JUL 17 2024

SEVERE THUNDERSTORM WATCH 553 IS IN EFFECT UNTIL 1000 PM EDT
FOR THE FOLLOWING LOCATIONS

MDC003-005-009-011-013-015-017-019-021-025-027-029-031-033-035-
037-039-041-045-047-510-180200-
/O.NEW.KWNS.SV.A.0553.240717T1840Z-240718T0200Z/

MD
.    MARYLAND COUNTIES INCLUDED ARE

ANNE ARUNDEL         BALTIMORE           CALVERT
CAROLINE             CARROLL             CECIL
CHARLES              DORCHESTER          FREDERICK
HARFORD              HOWARD              KENT
MONTGOMERY           PRINCE GEORGES      QUEEN ANNE`S
SOMERSET             ST. MARYS           TALBOT
WICOMICO             WORCESTER


MARYLAND INDEPENDENT CITIES INCLUDED ARE

BALTIMORE CITY
$$
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23 minutes ago, wxdude64 said:

Welp, lots of 'booming' here in last 10 minutes. On the southern edge of a STW. No water from the sky yet though, we shall see. Winds blowing 20-30 mph. 

0.25 and still falling, win. Temp down to 72.2 from the 88.9 high. 

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I would be interested in seeing data from July 1936 in your region. Toronto and New York City both set their all-time highs in July 1936 (Toronto 105F July 8, 9 and 10; NYC 106 July 9). A lot of other locations in eastern and central U.S. set very high records that month also. When it was reported that DCA matched a string of three hot days set in 1930, I started to wonder why 1936 wasn't in the mix (although NYC only went two days >100). The heat was generally intense from around 7th to mid-month (and also around Aug 3-5). A location in ND (Steele) was 120F and it exceeded 110 in parts of west-central Canada also, although July 1937 produced a hotter reading  of 113F in SK and June 30, 2021 broke that national record in BC at 120F in Lytton BC -- it was 45C (113F) at my place so for a day I was living in a location tying our national record -- town of Lytton (pop 1200) was burned to ground by train-track-spark-induced fires on day of record warm max). There has been very little rebuilding yet because of insurance wrangles and archaeology issues (academics wanting to sift soil for cultural relics pre-settlement days). Not that there is any rush to live in this notorious hot spot anyway.

On similar topic, a toasty 100F at 1230 local time as we endure day seven of our heat wave. I am by no means in a hot spot here, we live halfway upslope from Columbia River to alpine regions at around 3400' asl, it is probably around 105F in valley now. 

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SEVERE THUNDERSTORM WATCH OUTLINE UPDATE FOR WS 553NWS STORM PREDICTION CENTER NORMAN OK240 PM EDT WED JUL 17 2024SEVERE THUNDERSTORM WATCH 553 IS IN EFFECT UNTIL 1000 PM EDTFOR THE FOLLOWING LOCATIONSMDC003-005-009-011-013-015-017-019-021-025-027-029-031-033-035-037-039-041-045-047-510-180200-/O.NEW.KWNS.SV.A.0553.240717T1840Z-240718T0200Z/MD.    MARYLAND COUNTIES INCLUDED AREANNE ARUNDEL         BALTIMORE           CALVERTCAROLINE             CARROLL             CECILCHARLES              DORCHESTER          FREDERICKHARFORD              HOWARD              KENTMONTGOMERY           PRINCE GEORGES      QUEEN ANNE`SSOMERSET             ST. MARYS           TALBOTWICOMICO             WORCESTERMARYLAND INDEPENDENT CITIES INCLUDED AREBALTIMORE CITY$$


Radar looks intriguing. Sun is in and out in Frederick…I’m ready for some electrical storms.
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4 minutes ago, Roger Smith said:

I would be interested in seeing data from July 1936 in your region. Toronto and New York City both set their all-time highs in July 1936 (Toronto 105F July 8, 9 and 10; NYC 106 July 9). A lot of other locations in eastern and central U.S. set very high records that month also. When it was reported that DCA matched a string of three hot days set in 1930, I started to wonder why 1936 wasn't in the mix (although NYC only went two days >100). The heat was generally intense from around 7th to mid-month (and also around Aug 3-5). A location in ND (Steele) was 120F and it exceeded 110 in parts of west-central Canada also, although July 1937 produced a hotter reading  of 113F in SK and June 30, 2021 broke that national record in BC at 120F in Lytton BC -- it was 45F at my place so for a day I was living in a location tying our national record -- town of Lytton (pop 1200) was burned to ground by train-track-spark-induced fires on day of record warm max). There has been very little rebuilding yet because of insurance wrangles and archaeology issues (academics wanting to sift soil for cultural relics pre-settlement days). Not that there is any rush to live in this notorious hot spot anyway.

On similar topic, a toasty 100F at 1230 local time as we endure day seven of our heat wave. I ah by no means in a hot spot here, we live halfway upslope fro Colu bia River to alpine regions at around 3400' asl, it is probably around 105F in valley now. 

DCA also went big that second week of July 1936.  104 and 105 on the 9th and 10th.  That said the rest of the summer is unimpressive, including an amazing 60 degree high (!) on June 24th and 70s for highs multiple times at the end of July and early August.  It really was a one hit wonder summer.

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1 minute ago, MN Transplant said:

DCA also went big that second week of July 1936.  104 and 105 on the 9th and 10th.  That said the rest of the summer is unimpressive, including an amazing 60 degree high (!) on June 24th and 70s for highs multiple times at the end of July and early August.  It really was a one hit wonder summer.

What was the following winter like I wonder?

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White Sulphur Springs, WV (about 20 miles west of me).

1936-07-08 92 56 74.0 3.0 0 9 0.00 0.0 0
1936-07-09 99 58 78.5 7.4 0 14 0.00 0.0 0
1936-07-10 100 60 80.0 8.8 0 15 0.20 0.0 0
1936-07-11 95 63 79.0 7.8 0 14 0.00 0.0 0
1936-07-12 95 61 78.0 6.7 0 13 0.00 0.0 0

 

Hot Springs, VA (about 10 miles north and at 3700 elevation).

1936-07-08 86 55 70.5 -0.7 0 6 0.00
1936-07-09 92 59 75.5 4.2 0 11 0.00
1936-07-10 94 61 77.5 6.2 0 13 T
1936-07-11 94 63 78.5 7.2 0 14 0.30
1936-07-12 86 62 74.0 2.7 0 9 0.04

 

Lexington, VA (about 30 miles east of me).

1936-07-08 99 63 81.0 5.8 0 16 0.00
1936-07-09 99 66 82.5 7.2 0 18 0.00
1936-07-10 100 68 84.0 8.6 0 19 0.00
1936-07-11 96 68 82.0 6.6 0 17 T
1936-07-12 92 69 80.5 5.1 0 16 0.18

 

It was warm/hot, but not earth shattering. As someone posted, the end of month was remarkably cooler, and the averages for the month at each location was in the +0.6 to +2.0 range. 

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No idea what was going on with MRB in July 1936, though I’ve seen these same temps listed in all the climate records I have found.  Considering temps were 10 to 18° lower at HGR on a couple of these days, I would discount these.

IMG_5606.jpeg.590b74a3ca0abcb6a6b8c607b8de444b.jpeg

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53 minutes ago, MN Transplant said:

DCA also went big that second week of July 1936.  104 and 105 on the 9th and 10th.  That said the rest of the summer is unimpressive, including an amazing 60 degree high (!) on June 24th and 70s for highs multiple times at the end of July and early August.  It really was a one hit wonder summer.

image.png.1cbb10c955c99dee22cfa3c8d8a95619.png

 

Some have said this is a better-than-most climate site near DC, billed as Lincoln VA when you choose it, then it becomes Purcellville, in name. Anyway, if you drop that 72f on the first, the lowest max for the month is 87.  (But it always drops below 80 at night B), even on the 10th)

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Thanks for all data posted about July 1936. There are stories of horrific urban death tolls in Chicago, NYC, and Toronto as well as lots of other places in those pre-A/C days and after a sizzling 105-110 day, no relief even if lows dipped a bit below 80, inside temps were likely well into 90s after a few days of it ... and stories of people sleeping on rooftops and in parks for duration of severe heat. Toronto set high min records only broken once since (78F on several of days of 105F interval).

Also to give further idea of upper driving forces in July 1936, Toronto also had its sunniest and driest July on record. It basically did not rain at all and averaged 12 hrs sun per day. Drought must have been extreme in Ontario and upstate NY at least. It was quite warm also in may (a top 20 mean for Toronto and NYC) before a relatively cool June. Upper ridge probably peaking around 603-605 dm over SD-IA early in July, flattened a bit to allow heat to spread east, then retrogressed and a trof deepened over east coast later in July. Some further oscillations in August as heat was unrelenting in central plains states and showed up again briefly in eastern US and s Ontario early August (and again around Sept 18). 1854 was apparently a less extreme copy of 1936. Caswell's Providence RI journal talks about forest fire smoke clouds darkening skies around same time as 97-98 max in Toronto mid-July.

As to winter 1936-37, you'll probably find in detail, very cold at times late NOV, milder last part of DEC and all JAN, still quite mild FEB, colder in march -- betting most of 20" snow occurred at bookends of a mild winter.

Another summer with extreme heat in northeast US was 1911, any interesting runs of 100+ for you? 

 

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