June 2025 discussion-obs: Summerlike

[bluewave]

11 hours ago, JerseyWx said:

I can't imagine being above 90 as we approach midnight.  It's so crazy looking at Wundermap right now around Manhattan, Brooklyn, etc.  I've never experiened a phenomenon like that.  Textbook example of the UHI.

79 here.

Yeah, UHI is the reason that only the urban centers experienced 80° minimums during this heatwave. But the reason for the record minimums across all rural and urban sites is the warmer climate supporting higher dewpoints. So a 70° minimum at MPO and an 80° minimum in NYC during June are similar warm monthly minimum benchmarks for each location. 

The urban center around NYC is lucky that they didn’t experience a low minimum temperature as extreme as BTV did several years back. This is when BTV recorded their first 80° minimum. An equivalent record low minimum around NYC Metro would be 88°. Thankfully this hasn’t happened yet. But maybe in the coming decade somebody in NYC gets their first low max just under 90°.
 

RECORD EVENT REPORT
NATIONAL WEATHER SERVICE MOUNT HOLLY NJ
0200 AM EDT TUE JUN 24 2025

...RECORD DAILY AND MONTHLY HIGH TEMPERATURE AND RECORD WARMEST LOW 
TEMPERATURE SET AT MOUNT POCONO PA...

A RECORD HIGH TEMPERATURE OF 93 DEGREES WAS SET AT MOUNT POCONO PA
YESTERDAY. THIS BREAKS THE OLD RECORD OF 90 DEGREES SET IN 1908.

THIS WAS THE FIRST 90 DEGREE OR HIGHER TEMPERATURE IN THE MOUNT 
POCONO AREA IN 12 YEARS, WHEN THE HIGH TEMPERATURE WAS 90 DEGREES ON 
JULY 19, 2013. THIS WAS ALSO THE HOTTEST TEMPERATURE IN THE MOUNT 
POCONO AREA SINCE JULY 18, 2012, WHEN THE HIGH TEMPERATURE WAS 94 
DEGREES. ADDITIONALLY, THIS WAS THE WARMEST JUNE TEMPERATURE ON 
RECORD IN THE MOUNT POCONO AREA SINCE RECORDS BEGAN. THE PREVIOUS 
RECORD WARMEST JUNE TEMPERATURE WAS 92 DEGREES SET BACK ON JUNE 24, 
1914... JUNE 9, 1933... AND JUNE 26, 1952.

IN ADDITION TO THE RECORD HIGH TEMPERATURE, A RECORD WARMEST LOW 
TEMPERATURE OF 70 DEGREES WAS ALSO SET AT MOUNT POCONO PA YESTERDAY. 
THIS BREAKS THE OLD RECORD OF 69 DEGREES SET IN 2024.

TEMPERATURE RECORDS FOR THE MOUNT POCONO PA AREA DATE BACK TO 1901.

[SACRUS]

 

Not ideal when dealing with convective rains but you can see as the ridge pulls back it'll turn wetter with frequent storm chances starting Thu - jul 2 then again jul 5 -7

 

[TheClimateChanger]

33 minutes ago, bluewave said:

Yeah, UHI is the reason that only the urban centers experienced 80° minimums during this heatwave. But the reason for the record minimums across all rural and urban sites is the warmer climate supporting higher dewpoints. So a 70° minimum at MPO and an 80° minimum in NYC during June are similar warm monthly minimum benchmarks for each location. 

The urban center around NYC is lucky that they didn’t experience a low minimum temperature as extreme as BTV did several years back. This is when BTV recorded their first 80° minimum. An equivalent record low minimum around NYC Metro would be 88°. Thankfully this hasn’t happened yet. But maybe in the coming decade somebody in NYC gets their first low max just under 90°.
 

RECORD EVENT REPORT
NATIONAL WEATHER SERVICE MOUNT HOLLY NJ
0200 AM EDT TUE JUN 24 2025

...RECORD DAILY AND MONTHLY HIGH TEMPERATURE AND RECORD WARMEST LOW 
TEMPERATURE SET AT MOUNT POCONO PA...

A RECORD HIGH TEMPERATURE OF 93 DEGREES WAS SET AT MOUNT POCONO PA
YESTERDAY. THIS BREAKS THE OLD RECORD OF 90 DEGREES SET IN 1908.

THIS WAS THE FIRST 90 DEGREE OR HIGHER TEMPERATURE IN THE MOUNT 
POCONO AREA IN 12 YEARS, WHEN THE HIGH TEMPERATURE WAS 90 DEGREES ON 
JULY 19, 2013. THIS WAS ALSO THE HOTTEST TEMPERATURE IN THE MOUNT 
POCONO AREA SINCE JULY 18, 2012, WHEN THE HIGH TEMPERATURE WAS 94 
DEGREES. ADDITIONALLY, THIS WAS THE WARMEST JUNE TEMPERATURE ON 
RECORD IN THE MOUNT POCONO AREA SINCE RECORDS BEGAN. THE PREVIOUS 
RECORD WARMEST JUNE TEMPERATURE WAS 92 DEGREES SET BACK ON JUNE 24, 
1914... JUNE 9, 1933... AND JUNE 26, 1952.

IN ADDITION TO THE RECORD HIGH TEMPERATURE, A RECORD WARMEST LOW 
TEMPERATURE OF 70 DEGREES WAS ALSO SET AT MOUNT POCONO PA YESTERDAY. 
THIS BREAKS THE OLD RECORD OF 69 DEGREES SET IN 2024.

TEMPERATURE RECORDS FOR THE MOUNT POCONO PA AREA DATE BACK TO 1901.

Not true at all. There have been numerous low temperatures near or even above 80F in rural areas during this heatwave.

Hayward in northern rural Wisconsin had a low of 80F on the 22nd, which broke the monthly record by 5F and fell just 1F shy of the New York City (Central Park) monthly record: National Weather Service 

You don't get much more rural than Hayward, Wisconsin (pop: 2,500; county-wide pop: ~18,000).

Parts of rural Michigan had lows around 80F:

As did Minnesota. The 88F is probably overdone, but I did see one rural AWOS site with a low of 86F.

Likewise, Iowa and Nebraska saw a number of 80+ lows, including in rural or lower density locations.

[winterwx21]

42 minutes ago, SACRUS said:

 

Not ideal when dealing with convective rains but you can see as the ridge pulls back it'll turn wetter with frequent storm chances starting Thu - jul 2 then again jul 5 -7

 

I just hope our dry July 4th holds, but of course accuracy at this range isn't very good. 

[bluewave]

33 minutes ago, TheClimateChanger said:

Not true at all. There have been numerous low temperatures near or even above 80F in rural areas during this heatwave.

Hayward in northern rural Wisconsin had a low of 80F on the 22nd, which broke the monthly record by 5F and fell just 1F shy of the New York City (Central Park) monthly record: National Weather Service 

You don't get much more rural than Hayward, Wisconsin (pop: 2,500; county-wide pop: ~18,000).

Parts of rural Michigan had lows around 80F:

 

Take it easy. I was just commenting on our local area. Our minimums haven’t been as extreme as the Upper Midwest has been experiencing this year. UHI is the differential between urban and rural areas. But luckily the urban areas haven’t seen the minimums as extreme as the rural ones have especially like Wisconsin and International Falls back in May.

Around NYC Metro it’s very difficult for the minimums to remain above 80° outside the urban centers. We have been fortunate so far not to have experienced the low temperature extremes necessary for spots outside NYC to stay above 80° for low temperatures in recent years. 

So while both urban and rural areas around NYC have seen a record number of low maxes in recent years, the most extreme all-time low maxes have been going to our north. 

[TheClimateChanger]

35 minutes ago, TheClimateChanger said:

Not true at all. There have been numerous low temperatures near or even above 80F in rural areas during this heatwave.

Hayward in northern rural Wisconsin had a low of 80F on the 22nd, which broke the monthly record by 5F and fell just 1F shy of the New York City (Central Park) monthly record: National Weather Service 

You don't get much more rural than Hayward, Wisconsin (pop: 2,500; county-wide pop: ~18,000).

Parts of rural Michigan had lows around 80F:

As did Minnesota. The 88F is probably overdone, but I did see one rural AWOS site with a low of 86F.

Likewise, Iowa and Nebraska saw a number of 80+ lows, including in rural or lower density locations.

Sorry if this comes across as unduly harsh @bluewave. Certainly, appreciate your posts, but we do need to be careful about speaking in absolutes. There were plenty of rural areas that saw similar low temperatures, maybe not along the east coast where dews were lower. However, if the east coast had seen the 75+ dews that occurred further north and west, I bet there would have been a lot more readings in that 78-81 range. Just look at Saginaw, Michigan - two consecutive days above the previous ALL-TIME record high minimum. That's crazy. Can you imagine the masturbatory orgy of posting that would be going on here if places had multiple days in a row below their prior record low high temperatures, in December no less [and not even during the colder January/February period]?!?

We all know that would never happen. Instead, there will be a barrage of posts about how cold it is the next time there's a low temperature 5F above the prior daily record, or an isolated high temperature close to a record low due to an all-day deluge of rain. 

[SACRUS]

22 minutes ago, winterwx21 said:

I just hope our dry July 4th holds, but of course accuracy at this range isn't very good. 

I agree and am tracking in it the other thread

[bluewave]

14 minutes ago, TheClimateChanger said:

Sorry if this comes across as unduly harsh @bluewave. Certainly, appreciate your posts, but we do need to be careful about speaking in absolutes. There were plenty of rural areas that saw similar low temperatures, maybe not along the east coast where dews were lower. However, if the east coast had seen the 75+ dews that occurred further north and west, I bet there would have been a lot more readings in that 78-81 range

No problem. If our area had low temperature extremes like places in Wisconsin, Minnesota, and Vermont in recent years, then we would see lows around 88° in Queens and 83° at HPN and ISP.

We are fortunate that we still haven’t seen a warm season extreme here like the 80° back in February 2018. An equivalent July extreme would be a high of 112° in Queens and around Newark. With low temperatures near 90° in both locations. Under such a scenario even the surrounding more rural areas would reach 105-108° during the day and struggle to fall much below 84° and 85° for a low. 

 

[LibertyBell]

4 hours ago, SACRUS said:

RIght.  If you account for the Park's tendency Jul 2013 was also.  We'll see how strong the heat can get with the next ridge later next month / Aug.

102.6 here, it hit 102+ twice but the clouds keep getting in the way

[LibertyBell]

1 hour ago, bluewave said:

No problem. If our area had low temperature extremes like places in Wisconsin, Minnesota, and Vermont in recent years, then we would see lows around 88° in Queens and 83° at HPN and ISP.

We are fortunate that we still haven’t seen a warm season extreme here like the 80° back in February 2018. An equivalent July extreme would be a high of 112° in Queens and around Newark. With low temperatures near 90° in both locations. Under such a scenario even the surrounding more rural areas would reach 105-108° during the day and struggle to fall much below 84° and 85° for a low. 

 

record highs are much more exciting than record high mins

[JerseyWx]

3 hours ago, Dark Star said:

Just the opposite.  I can't say the the Urban Heat Island effect was responsible for THI values over 100 for such a large area.

No you're missing the point.  The UHI is why it was over 90 degrees after midnight in the city areas, where I was like 77 or so.

[Dark Star]

1 minute ago, JerseyWx said:

No you're missing the point.  The UHI is why it was over 90 degrees after midnight in the city areas, where I was like 77 or so.

I'm in a "suburb" in Union County NJ, and it was near 90 around midnight.  I don't think anyone  on this board has any uncertainties about the urban heat island effect.

[bluewave]

1 hour ago, LibertyBell said:

record highs are much more exciting than record high mins

International Falls getting their earliest 70° minimum by 35 days back in May was probably the most impressive temperature record for the CONUS this year so far at a +33° minimum.

CLIMATE REPORT 
NATIONAL WEATHER SERVICE DULUTH MN
426 PM CDT MON MAY 12 2025

...................................

...THE INTERNATIONAL FALLS CLIMATE SUMMARY FOR MAY 12 2025...
VALID TODAY AS OF 0400 PM LOCAL TIME.

CLIMATE NORMAL PERIOD: 1991 TO 2020
CLIMATE RECORD PERIOD: 1895 TO 2025


WEATHER ITEM   OBSERVED TIME   RECORD YEAR NORMAL DEPARTURE LAST      
                VALUE   (LST)  VALUE       VALUE  FROM      YEAR     
                                                  NORMAL           
...................................................................
TEMPERATURE (F)                                                          
 TODAY                                                               
  MAXIMUM         90R  2:59 PM  86    1991  63     27       67        
  MINIMUM         70   5:43 AM  18    2020  37     33       40        
  AVERAGE         80                        50     30       54     

[MorristownWx]

Based on trajectory most of the storms look to miss to our south 

[SACRUS]

 

to 99 here now to 94 clouds to the west

[LibertyBell]

1 hour ago, MorristownWx said:

Based on trajectory most of the storms look to miss to our south 

it's raining here now!

[LibertyBell]

the last two days were truly historic.  I did a quick survey of local weather stations (the micronet does not save high low information, which is a drawback.)

the first and third weather stations in this list closely match my highs of 102.6 and 106.0 the last two days.  

 

https://www.wunderground.com/dashboard/pws/KNYWOODM8

102.9

105.2

https://www.wunderground.com/dashboard/pws/KNYVALLE55

107.1

111.7

https://www.wunderground.com/dashboard/pws/KNYVALLE15

102.7

106.2

https://www.wunderground.com/dashboard/pws/KNYNEWYO2050

106.2

109.6

https://www.wunderground.com/dashboard/pws/KNYWOODM4

102.2

104.2

[ForestHillWx]

Rain on our doorsteps. 

[SACRUS]

 

 

Highs:

JFK: 102
ACY: 102
EWR: 101
LGA: 99
BLM: 99 * no intra hour observations
PHL: 99
New Brnswck: 98
ISP: 98
TEB: 98
TTN: 96
NYC: 96

[SACRUS]

 

Park and TTN (of late) the coolest spots.

[SACRUS]

 

Doesn't look like we'll get midnight 90s in any of the metro sites and tomorrow falls short of 90.  EWR is still at 96 but dropping 

[TWCCraig]

87/72

About to get some rain

[SACRUS]

 

 

[LibertyBell]

1 hour ago, SACRUS said:

 

 

Highs:

JFK: 102
ACY: 102
EWR: 101
LGA: 99
BLM: 99 * no intra hour observations
PHL: 99
New Brnswck: 98
ISP: 98
TEB: 98
TTN: 96
NYC: 96

this area has been the hot spot the last 2 days.  JFK if anything underdone on temperatures yesterday, there were widespread 105-106 temperatures across southern Queens and southern Nassau yesterday.

102 today is closer to reality, it bounced back and forth between 102 and 103 here today.

[Cfa]

Lightning from the storm out in the Atlantic is visible all the way from the north shore of LI, I initially thought it was much closer.

[donsutherland1]

Prior to 2025, here are the frequencies of 80 or above lows and 90 or above highs in Central Park during summer.

[LibertyBell]

1 hour ago, donsutherland1 said:

Prior to 2025, here are the frequencies of 80 or above lows and 90 or above highs in Central Park during summer.

The bugs are out tonight Don =\ The rain and these warm minimums must have a lot to do with it.

Are the temperatures going to stay above 80 most of the night? With a cold front coming through and rain falling you'd think they'd fall faster.

[LibertyBell]

1 hour ago, Cfa said:

Lightning from the storm out in the Atlantic is visible all the way from the north shore of LI, I initially thought it was much closer.

Lightning bugs / fireflies are also out in force tonight !!

[The 4 Seasons]

Record highs mon-wed and wed records

[LibertyBell]

48 minutes ago, The 4 Seasons said:

Record highs mon-wed and wed records

Is there any way to rank heatwaves the way we rank KU events? In terms of intensity, longevity, coverage of 90, 95 and 100 degree temperatures (both by area and by population affected), etc.?