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April 2025 Discussion/Obs


Rjay
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16 hours ago, qg_omega said:

 

When?

THE NEWARK NJ CLIMATE SUMMARY FOR APRIL 19 2025...

CLIMATE NORMAL PERIOD 1991 TO 2020
CLIMATE RECORD PERIOD 1931 TO 2025


WEATHER ITEM   OBSERVED TIME   RECORD YEAR NORMAL DEPARTURE LAST      
                VALUE   (LST)  VALUE       VALUE  FROM      YEAR     
                                                  NORMAL           
...................................................................
TEMPERATURE (F)                                                          
 YESTERDAY                                                           
  MAXIMUM         87    302 PM  92    1976  64     23       55       
  MINIMUM         58   1242 AM  33    2001  45     13       44       
                                      2020                           
  AVERAGE         73                        55     18       50     

PRECIPITATION (IN)                                                    
  YESTERDAY        0.00          1.97 1978   0.13  -0.13      T       
  MONTH TO DATE    1.85                      2.42  -0.57     3.65     
  SINCE MAR 1      6.43                      6.55  -0.12    11.64     
  SINCE JAN 1      9.71                     12.95  -3.24    18.91     

SNOWFALL (IN)                                                              
  YESTERDAY        0.0           4.1  1983   0.0    0.0      0.0      
  MONTH TO DATE    0.0                       0.5   -0.5      0.0      
  SINCE MAR 1      0.0                       6.1   -6.1       T       
  SINCE JUL 1     13.6                      31.5  -17.9     12.2      
  SNOW DEPTH       0                                                 

DEGREE DAYS                                                           
 HEATING                                                              
  YESTERDAY        0                        11    -11       15        
  MONTH TO DATE  257                       267    -10      205        
  SINCE MAR 1    772                       964   -192      711        
  SINCE JUL 1   3987                      4467   -480     3627        

 COOLING                                                              
  YESTERDAY        8                         0      8        0        
  MONTH TO DATE    9                         0      9        4        
  SINCE MAR 1      9                         1      8        4        
  SINCE JAN 1      9                         1      8        4        
...................................................................


WIND (MPH)                                                            
  HIGHEST WIND SPEED    30   HIGHEST WIND DIRECTION    SW (230)       
  HIGHEST GUST SPEED    46   HIGHEST GUST DIRECTION    SW (240)       
  AVERAGE WIND SPEED    14.2                                        
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Always interesting when a "cold" front comes through in the spring on LI, temps went from the upper 50's last night to near 70 in the early morning once the front passed.

There's a bit of elevated smoke in the sky on the visible satellite, noticeable over PA. It is moving south with clearer air to our north

1934930520_COD-GOES-East-subregional-Mid_Atlantic_02.20250420.114117-overmap-barsnone.thumb.gif.80b39f8d39a1ec6c25e611ff80b428d0.gif

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21 hours ago, LibertyBell said:

Chris, the oceans are acting as a check and regulating the high temperatures for us (somewhat at any rate).  Our decade for most number of 90 degree days was the 90s.  Or to be more precise, 1991 to 2002.  We haven't seen a consistently super hot summer since 2010 and before that it was 1993 that set all our records (and 1983 before that.)

I don't believe it's an accident or a fluke that we're seeing more seabreeze summers, this is the ocean's response to what we're doing to the climate.  The planet always seeks to find a balance.

 

The elongation of the subtropical ridge north to just east of New England has turned the flow more onshore at JFK. But the overall summer average high temperatures have been rising faster than the maximum high temperatures.So the rate of the average increase is faster than the increase in 90 days. This is due to the warmer minimums acting as a higher launch point for the afternoon highs. This results in the rate of 85° days increasing faster than the 90° days. Since the stronger afternoon sea breeze slows the rate of 90° days increasing faster increases. So two things can be true at the same time.


IMG_3436.thumb.jpeg.dea3ce6a59eed1ccca8534bcbd1424a1.jpeg

IMG_3435.thumb.jpeg.e7c146c75d5ddc5b2d232ad72d3a362a.jpeg

IMG_3434.thumb.jpeg.caa1e9632663061a4facd646010729d7.jpeg

 

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1 hour ago, bluewave said:

The elongation of the subtropical ridge north to just east of New England has turned the flow more onshore at JFK. But the overall summer average high temperatures have been rising faster than the maximum high temperatures.So the rate of the average increase is faster than the increase in 90 days. This is due to the warmer minimums acting as a higher launch point for the afternoon highs. This results in the rate of 85° days increasing faster than the 90° days. Since the stronger afternoon sea breeze slows the rate of 90° days increasing faster increases. So two things can be true at the same time.


IMG_3436.thumb.jpeg.dea3ce6a59eed1ccca8534bcbd1424a1.jpeg

IMG_3435.thumb.jpeg.e7c146c75d5ddc5b2d232ad72d3a362a.jpeg

IMG_3434.thumb.jpeg.caa1e9632663061a4facd646010729d7.jpeg

 

Yes this higher average increase is not nearly as interesting as an increase in higher high temperatures would be.  It seems as though nature is regulating against higher extreme maximum temperatures via the oceans.  Average temperatures and overnight minimums are not as interesting because 1) we're mostly sleeping when these minimums are occurring, and 2) averaging temperatures smooths out the data.  I believe we should rank heat by number of 90 degree days (which is how the NWS ranks our hottest summers.)

This is probably why NYC's highest temperature ever was recorded in 1936 and for JFK and LGA it's 1966.

EWR which is further inland is 2011 (which is also the hottest temperature I've ever experienced here on Long Island.)

 

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1 hour ago, bluewave said:

The elongation of the subtropical ridge north to just east of New England has turned the flow more onshore at JFK. But the overall summer average high temperatures have been rising faster than the maximum high temperatures.So the rate of the average increase is faster than the increase in 90 days. This is due to the warmer minimums acting as a higher launch point for the afternoon highs. This results in the rate of 85° days increasing faster than the 90° days. Since the stronger afternoon sea breeze slows the rate of 90° days increasing faster increases. So two things can be true at the same time.


IMG_3436.thumb.jpeg.dea3ce6a59eed1ccca8534bcbd1424a1.jpeg

IMG_3435.thumb.jpeg.e7c146c75d5ddc5b2d232ad72d3a362a.jpeg

IMG_3434.thumb.jpeg.caa1e9632663061a4facd646010729d7.jpeg

 

Chris is that 2010 when JFK spiked up to around 30 90 degree days on that graph? I think it's a little low, it falls just short of 30, when JFK actually had 31 90 degree days in 2010 (and 10 95 degree days)!

 

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33 minutes ago, LibertyBell said:

Yes this higher average increase is not nearly as interesting as an increase in higher high temperatures would be.  It seems as though nature is regulating against higher extreme maximum temperatures via the oceans.  Average temperatures and overnight minimums are not as interesting because 1) we're mostly sleeping when these minimums are occurring, and 2) averaging temperatures smooths out the data.  I believe we should rank heat by number of 90 degree days (which is how the NWS ranks our hottest summers.)

This is probably why NYC's highest temperature ever was recorded in 1936 and for JFK and LGA it's 1966.

EWR which is further inland is 2011 (which is also the hottest temperature I've ever experienced here on Long Island.)

 

Ironically those all time record highs in July 1936 happened in a month that actually finished below normal using today's averages. 

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21 minutes ago, Sundog said:

Ironically those all time record highs in July 1936 happened in a month that actually finished below normal using today's averages. 

Yes, we've had hotter summers since with many more 90 degree days.  The Dust Bowl era had some amazing and historic heat though, there are records from 1936 that still stand to this day, not just city records but state records from across the country.  And 1931-32 is still considered one of our warmest winters on record.

My top heat summers in chronological order are 1944, 1955, 1966, 1977, 1980, 1983, 1991, 1993, 1995, 1999, 2002, 2010 (note how many of them are in the 90s lol.)

 

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60 / 30 windy and cloudy.  Clearing later this morning and early afternoon.  Overnight highs should exceed afternoon highs for many. Cloudy and cooler Monday near 60.  Back near 80 Tuesday and then a very nice Wed/ Thu (similar to Friday 18th).  Next shot at rain Fri/Sat later this week but overall drier and warmer going into the close of the month.  

 

vis_nj_anim.gif

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Records:

Highs:

EWR: 91 (1941)
NYC: 90 (1927)
LGA: 85 (2005)
JFK: 80 (2005)


Lows:

EWR: 34 (1953)
NYC: 24 (1897)
LGA: 35 (1953)
JFK: 36 (2018)

 

Historical:

 

1901 - A spring storm produced unusally heavy snow in northeast Ohio. Warren received 35.5 inches in thirty-six hours, and 28 inches fell at Green Hill. Akron OH established April records of 15.6 inches in 24 hours, and 26.6 inches for the month. Pittsburgh PA established April records of 12.7 inches in 24 hours, and 13.5 inches for the month. (David Ludlum) (The Weather Channel)

1912: A tornado moved north-northeast from 5 miles southeast of Rush Center, KS across the east half of Bison, KS. Farms were wiped out near Rush Center. The loss at Bison was $70,000 as half of the town, about 50 homes, were damaged or destroyed. There were 15 injuries in town. A dozen farms were nearly wiped out. Debris from the farmhouses was carried for 8 miles. A senior man who made light of the storm was killed with his granddaughter on a farm 2 miles southwest of Bison.

1920 - Tornadoes in Mississippi and Alabama killed 219 persons. (David Ludlum)

1920: Tornadoes in Mississippi and Alabama killed 219 persons. Six tornadoes of F4 intensity were reported. Aberdeen, Mississippi was hard hit by an F4 tornado that killed 22 people. This same tornado killed 20 in Marion County, Alabama. Nine people in one family died in Winston County, Alabama. 

1952 - The tankers Esso Suez and Esso Greensboro crashed in a thick fog off the coast of Morgan City LA. Only five of the Greensboro's crew survived after the ship bursts into flame. (David Ludlum)

1984: A temperature of 106 degrees at Del Rio, Texas set a new record high for April.

1987 - Fifty-two cities in the central and eastern U.S. reported new record high temperatures for the date. The high of 92 degrees at Memphis TN was a record for April, and the high of 94 at Little Rock AR equalled their April record. (The National Weather Summary)

1988 - A storm in the western U.S. brought heavy rain to parts of California. Mount Wilson was soaked with 4.15 inches of rain in 24 hours. The heavy rain caused some flooding and mudslides in the Los Angeles area, and a chain reaction collision of vehicles along the Pomona Freeway which resulted in 26 injuries. (Storm Data) (The National Weather Summary)

1989 - Hot weather spread from the southwestern U.S. into the Great Plains Region. Twenty-three cities reported new record high temperatures for the date. The afternoon high of 104 degrees at Tucson AZ was an April record, and highs of 87 at Provo UT, 90 at Pueblo CO, and 85 at Salt Lake City UT, equalled April records. (The National Weather Summary)

1990 - A fast moving Pacific storm produced heavy snow in the central mountains and the Upper Arkansas Valley of Colorado, with a foot of snow reported at Leadville. Thunderstorms in the south central U.S. produced wind gusts to 76 mph at Tulsa OK, and heavy rain which caused flooding of Cat Claw Creek in the Abilene TX area. Lightning struck the building housing a fish farm in Scott AR killing 10,000 pounds of fish. Many of the fish died from the heat of the fire. (The National Weather Summary) (Storm Data)

2004: A strong F3 tornado moved across the town of Utica, near LaSalle-Peru in north-central Illinois. This tornado destroyed several homes, a machinery building, and a tavern. The roof of the tavern collapsed, killing eight people inside; many of these people had come into town from nearby mobile homes, seeking sturdier shelter. The tornado dissipated on a steep bluff on the northeast side of the city. Another tornado developed shortly afterward, crossing I-80 near Ottawa. Several other tornadoes developed across north central and northeast Illinois, affecting areas around Joliet and Kankakee.

2006 - Up to five feet of snow falls in the Dakotas. I-94 and other highways were closed.

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Recent warmth has turned the negatives to positives at EWR and around we go.  Tue - Thu should add to these.

 

Monthly Departures through 4/19

ISP: +1.3
JFK: +1.1
EWR: +0.4
LGA: -0.9
NYC: -1.2

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1 hour ago, LibertyBell said:

Chris is that 2010 when JFK spiked up to around 30 90 degree days on that graph? I think it's a little low, it falls just short of 30, when JFK actually had 31 90 degree days in 2010 (and 10 95 degree days)!

 

That graph was just JJA to focus on the summer.

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19 minutes ago, IrishRob17 said:

Drinks spilling, plates of food getting flipped as tablecloths become sails in this wind. Delightful. 

Well the wind is too strong lol

The temps though are lovely

Is the wind supposed to stay strong all afternoon?

 

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22 minutes ago, LibertyBell said:

sky conditions are good but it's extremely windy here today, I saw trash and trash cans flying down the street lol.

 

I feel like the wind isn't as strong as it was a few hours ago, but it's still pretty breezy for sure

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2 hours ago, LibertyBell said:

Yes this higher average increase is not nearly as interesting as an increase in higher high temperatures would be.  It seems as though nature is regulating against higher extreme maximum temperatures via the oceans.  Average temperatures and overnight minimums are not as interesting because 1) we're mostly sleeping when these minimums are occurring, and 2) averaging temperatures smooths out the data.  I believe we should rank heat by number of 90 degree days (which is how the NWS ranks our hottest summers.)

This is probably why NYC's highest temperature ever was recorded in 1936 and for JFK and LGA it's 1966.

EWR which is further inland is 2011 (which is also the hottest temperature I've ever experienced here on Long Island.)

 

It’s easier to get westerly winds during the winter than summer at JFK. So winter 50° days are increasing at a faster rate than summer 90° days. But NJ away from the sea breeze has seen an increase in both. 
 

IMG_3438.thumb.jpeg.e14e474ebc4f9f4ceb2ea7f8cbd7110a.jpeg

IMG_3439.thumb.jpeg.78d4b2777f72d7affc76fb0d815e41b4.jpeg

 

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36 minutes ago, bluewave said:

It’s easier to get westerly winds during the winter than summer at JFK. So winter 50° days are increasing at a faster rate than summer 90° days. But NJ away from the sea breeze has seen an increase in both. 
 

IMG_3438.thumb.jpeg.e14e474ebc4f9f4ceb2ea7f8cbd7110a.jpeg

IMG_3439.thumb.jpeg.78d4b2777f72d7affc76fb0d815e41b4.jpeg

 

I think we'll start to see a change to more westerly flow this year with a switch to -AMO and back to more of an 80s/90s pattern that we've been seeing wholesale throughout our local climate. More summers like 1980 and 1983 and 1993 and 1999 and 2002 and 2010 vs what we've seen the last few years.

Thanks for this graph, this is exactly what I was looking for Chris!  1983, 2002 and 2010 really stand out!  Do you have a similar graph for 95 degree days too?

Our real heat comes from Sonoran Heat Release from the SW.

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34 minutes ago, bluewave said:

It’s easier to get westerly winds during the winter than summer at JFK. So winter 50° days are increasing at a faster rate than summer 90° days. But NJ away from the sea breeze has seen an increase in both. 
 

IMG_3438.thumb.jpeg.e14e474ebc4f9f4ceb2ea7f8cbd7110a.jpeg

IMG_3439.thumb.jpeg.78d4b2777f72d7affc76fb0d815e41b4.jpeg

 

it's telling that JFK has been warmer vs average even in April vs NYC.

 

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37 minutes ago, bluewave said:

It’s easier to get westerly winds during the winter than summer at JFK. So winter 50° days are increasing at a faster rate than summer 90° days. But NJ away from the sea breeze has seen an increase in both. 
 

IMG_3438.thumb.jpeg.e14e474ebc4f9f4ceb2ea7f8cbd7110a.jpeg

IMG_3439.thumb.jpeg.78d4b2777f72d7affc76fb0d815e41b4.jpeg

 

Thanks for this graph, this is exactly what I was looking for Chris!  1983, 2002 and 2010 really stand out!  Do you have a similar graph for 95 degree days too?

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