bluewave

This was a record event for late June in our area. The La Niña sample size for 103° or greater is very limited for the last 10 days of June. But 2021 was the last time. It turned out to be the highest summer temperatures we experienced that year. This extreme event was associated with a very deep trough diving into the West. Current models forecasts don’t show a trough returning to the West as we head into July. So my very early guess is that this could be the only 103° to 105° range we see this summer. But there could very well be another few 100°-102° days beyond this current period.

JFK could have reached 105° if the sea breeze didn’t arrive. The Lefferts/ Ozone Park station just to the north on the other side of the Belt Parkway reached 105°. Another nearby separate Ozone Park station also made it to 105°. Newark and Harrison in NJ both reached 103°. This is the earliest 105° across the area since 7-3-1966. So the first 105° readings in this area during the month of June. Corona 104 92 79 22 0.00 E 40th St. / Murray Hill 102 86 94 102 92 69 25 0.00 East River at Alphabet City Fresh Kills 102 79 92 105 79 90 29 0.00 18 9:35am 11 6:35pm 29.0 Glendale / Maspeth 102 83 94 103 90 78 23 0.00 Gold Street / Navy Yard 102 85 94 104 91 71 25 0.00 21 9:40am 10 9:05am 28.6 Lefferts / South Ozone Park 105 79 93 105 79 88 21 0.00 GW2248 OZONE PARK Observation Time: 06/25/25 @ 06:14 EDT 10:14 UTC Elevation: 22 ft OK Weather Conditions Temperature: 87 °F Dew Point: 71 °F Humidity: 60 % Peak Gust: 0 MPH 24 Hour Max/Min Events Max Temperature: 105 °F Min Temperature: 82 °F Max RH: 83 % Min RH: 26 % Max Dew Point: 77 °F Min Dew Point: 62 °F Max Gust: 7 MPH Data for June 1, 2025 through June 25, 2025 Click column heading to sort ascending, click again to sort descending. NJ NEWARK LIBERTY INTL AP WBAN 103 NJ HARRISON COOP 103 NY JFK INTERNATIONAL AIRPORT WBAN 102 NY LAGUARDIA AIRPORT WBAN 101 NJ TETERBORO AIRPORT WBAN 101 NJ CALDWELL ESSEX COUNTY AP WBAN 101 CT MERIDEN MARKHAM MUNICIPAL AP WBAN 101 NY ISLIP-LI MACARTHUR AP WBAN 101 NY FARMINGDALE REPUBLIC AP WBAN 100 NY SHIRLEY BROOKHAVEN AIRPORT WBAN 100

Pretty impressive to see POU beat daily record by +6°. CLIMATE REPORT NATIONAL WEATHER SERVICE ALBANY NY 439 PM EDT TUE JUN 24 2025 ................................... ...THE POUGHKEEPSIE NY CLIMATE SUMMARY FOR JUNE 24 2025... VALID TODAY AS OF 0400 PM LOCAL TIME. 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) TODAY MAXIMUM 100R 2:59 PM 94 1945 82 18 79

All official temperature readings are taken in the sun with a fan-aspirated radiation shield. Put that set up under a stand of mature trees and the temperature will drop from 3° to sometimes 5° degrees on warm sunny days. Prior to the 1990s the sensor and shield with the fan was in direct sunlight. So this sets up the discontinuity between the pre and post 1990s temperature readings from Central Park. This is why Newark and NYC used to trade places with which station was warmer from 1930 to 1980. It’s possible the tree growth was becoming an issue in the 80s to early 90s. But really became pronounced since the 1990s and especially since 2013.

The main point is that it wasn’t in the shade prior to the 1990s. Those trees grew up around and over that platform. So when all those old 90s and 100s records occurred from the 1930s into the 1980s, it had more of an open exposure like the current 102° a few blocks to the east. So subtract 3° to 5° from all those old records and there would have been hardly any days over 100° from the 1930s into the 1980s if the trees were there in those days.

RECORD EVENT REPORT NATIONAL WEATHER SERVICE NEW YORK, NY 307 PM EDT TUE JUN 24 2025 ...RECORD DAILY AND MONTHLY HIGH TEMPERATURE SET AT ISLIP MACARTHUR AIRPORT... THE HIGH TEMPERATURE REACHED 100 DEGREES SO FAR TODAY AT ISLIP MACARTHUR AIRPORT. THIS BREAKS THE OLD DAILY RECORD OF 96 DEGREES, SET IN 1966. THIS ALSO BREAKS THE MONTHLY RECORD SET IN 1966 AND 1994, MAKING TODAY THE HOTTEST JUNE DAY ON RECORD AT THIS SITE. THIS PRODUCT WILL BE UPDATED SHOULD TEMPERATURES CONTINUE TO RISE. RECORDS FOR THE ISLIP NY AREA GO BACK TO 1963. ALL CLIMATE DATA ARE CONSIDERED PRELIMINARY UNTIL REVIEWED BY THE NATIONAL CENTERS FOR ENVIRONMENTAL INFORMATION (NCEI).

Lefferts/ South Ozone Park now 103°.

Pretty wild to see MTP hit 97°. Weather conditions for: Montauk, Montauk Airport, NY (ASOS/AWOS - OKX) Elev: 7.0 ft; Lat/Lon: 41.07306/-71.92333 Get Yearly Precip Total (non QA/QC'd data) Get Water Year Precip Total (non QA/QC'd data): For selected observations near this location: click here Date/Time (L) Temp. (°F) Dew Point (°F) Relative Humidity (%) Heat Index (°F) Wind Direction Wind Speed (mph) Sea Level Pressure (mb) Station Pressure (in Hg) Altimeter Setting (in Hg) 6 Hr Max (°F) 6 Hr Min (°F) 24 Hr Max (°F) 24 Hr Min (°F) Jun 24, 1:54 pm 97 72 45 106 W 6 1017.30 30.03 30.04 97 82

Corona, Newark, and Harrison now at 102°.

100° now a few blocks east of the ASOS on 75th street on the ENSO west network. With several 100°+ readings just outside the Park on Wunderground.

JFK at 101° now. RECORD EVENT REPORT NATIONAL WEATHER SERVICE NEW YORK, NY 1233 PM EDT TUE JUN 24 2025 ...RECORD DAILY AND MONTHLY HIGH TEMPERATURE SET AT JOHN F. KENNEDY AIRPORT... THE HIGH TEMPERATURE REACHED 101 DEGREES SO FAR TODAY AT JOHN F. KENNEDY AIRPORT. THIS BREAKS THE OLD DAILY RECORD OF 97 DEGREES, SET IN 2010. THIS ALSO BREAKS THE MONTHLY RECORD OF 99 SET IN 1949, 1952, 1959 AND 1964, MAKING TODAY THE HOTTEST JUNE DAY ON RECORD AT THIS SITE. THIS PRODUCT WILL BE UPDATED THIS AFTERNOON SHOULD TEMPERATURES CONTINUE TO RISE. RECORDS GO BACK TO THE YEAR 1948 AT THIS CLIMATE STATION. ALL CLIMATE DATA ARE CONSIDERED PRELIMINARY UNTIL REVIEWED BY THE NATIONAL CENTERS FOR ENVIRONMENTAL INFORMATION (NCEI).

The mesonet sites had to find spots which would allow weather stations to be set up. There is a park on the south side of Merrick road at the Wantagh site which had the open land. Plus it’s right next to the old Wantagh COOP which registered the 107° reading back in 2010.

Yeah, this is how Mineola and Wantagh got to 108° and 107° back in July 2010. Downslope flow off the moraine which created compressional warming just on the Inland side of the sea breeze front. The zone this afternoon where the downslope meets the sea breeze will probably go 102° to 104° with maybe a 105° max in the warmest spots from Queens and Brooklyn into Nassau. Monthly Data for July 2010 for New York Click column heading to sort ascending, click again to sort descending. MINEOLA COOP 108 WANTAGH CEDAR CREEK COOP 107 LAGUARDIA AIRPORT WBAN 103 NY CITY CENTRAL PARK WBAN 103 WEST POINT COOP 103 RHINEBECK 4SE COOP 103 SHIRLEY BROOKHAVEN AIRPORT WBAN 103 New York-LGA Area ThreadEx 103 New York-Central Park Area ThreadEx 103 FARMINGDALE REPUBLIC AP WBAN 102 DOBBS FERRY-ARDSLEY COOP 102 POUGHKEEPSIE/HUDSON VALLEY REGIONAL AIRPORT WBAN 102 WESTCHESTER CO AP WBAN 102 Poughkeepsie Area ThreadEx 102 STONYKILL NEW YORK RAWS 102 ISLIP-LI MACARTHUR AP WBAN 101 ROSENDALE 2 E COOP 101 BLOOMINGBURG 2 SW COOP 101 JFK INTERNATIONAL AIRPORT WBAN 101

I am hoping they can manage the power demands on the system later to avoid anything more than some scattered outages or brown outs. Running 24hrs uninterrupted with the heat index over 90° is impressive. So usage should really spike this afternoon.

I see what you mean. I actually drove to the mesonet site in Wantagh when I was back on the South Shore. It’s located in a park just east of the Wantagh Parkway. I will bet you can find the Corona one if you look for that street view showing up on the camera.

Yeah, you can see the exact spot when you open the map in the layers tab.

It has to be since they use those sensors as one tool to gauge the power demands on the Con Edison power grid. This is the highest precision temperature coverage NYC has ever had. It’s an extension of the NY State Mesonet.

You are correct. This is the first time that JFK reached 90° at 8am in June. So they could reach 100° before noon if the sea breeze can hold off. https://mesonet.agron.iastate.edu/plotting/auto/?_wait=no&q=153&network=NY_ASOS&zstation=JFK&month=jun&sday=0624&eday=1231&var=max_tmpf&_r=t&dpi=100&_fmt=png

The HRRR is the most aggressive in suppressing the sea breeze allowing JFK to reach 100°. The other guidance is just a few miles north stalling along the Belt Parkway to Southern State. Somebody just north of sea breeze with downslope compressional warming will probably go 102°-104°. Maybe a peak somewhere of 105° from Newark to Central Queens and perhaps NW Nassau.

It will be a race at JFK today to see if they can reach 100° before the sea breeze. The record ridge is so strong that the Bermuda high pressure is building much further north into Canada. So it leaves a little weakness in the ridge near our area that allows a sea breeze south of the Belt Parkway and the Southern State on Western LI.

Warm spots like Glendale/ Maspeth Queens already 88° after a low of 83°.

The extension of the record Aleutian Ridge closer to Japan has actually slowed the start of the rainy season there with the record heat.

Pretty impressive for so far north this early in the season to tie an all-time high. ...AN ALL-TIME RECORD HIGH TEMPERATURE TIED AND A DAILY HIGH TEMPERATURE RECORD SET AT PLATTSBURGH NY... AN ALL TIME RECORD HIGH TEMPERATURE OF 101 DEGREES WAS TIED AT PLATTSBURGH NY YESTERDAY. THIS TIES THE OLD RECORD OF 101 DEGREES SET ON AUGUST 1ST AND 2ND IN 1975 AND AUGUST 5TH IN 1955.

It seems to have lingered from the winter and spring with the record westerly winds that caused all the upwelling. But the current cool spot is much smaller than it was. Though the local SSTs are still a bit below average for this time of year.

Shorter term guidance showing more of a sea breeze tomorrow south of the Belt and Southern State Parkways .So it’s possible that JFK only makes it to 98-99° with 102° to 104° just north near Corona, Queens. Someone in the area could get very close to 105° where the best compressional warming occurs.