bluewave

The 17h day with a 75°+ dew point continues the record streak since 2016.

With a high so far of 96° today, Newark moves up to the 4th highest number of 95° or warmer days at 18. Time Series Summary for NEWARK LIBERTY INTL AP, NJ - Jan through Dec Click column heading to sort ascending, click again to sort descending. Rank Year Number of Days Max Temperature >= 95 Missing Count 1993 25 0 2010 21 0 1988 20 0 1944 20 0 2021 18 127

The HREF has been doing a great job this summer with the heavy rainfall and flash flooding signals. But the locations of the heaviest amounts have been off at times. So we may have to wait until nowcast time to know which areas will see the highest totals with this next event.

Islip moves into 2nd place for most 90° days in August. NYC will probably reach 90° shortly. So ISP will have a 7 to 5 August 90° day lead over NYC. The wet vegetation above the sensor in NYC is really distorting the climate record. You can see how NYC easily beat ISP in 1980 before the tree growth really got out of hand. Time Series Summary for ISLIP-LI MACARTHUR AP, NY - Month of Aug Click column heading to sort ascending, click again to sort descending. Rank Year Number of Days Max Temperature >= 90 NYC 1 1980 8 15 2 2016 7 7 - 2005 7 9 2021 7 5

This is the first time that Newark had bookend winter snowfall followed by bookend summer heat. Monthly Total Snowfall for NEWARK LIBERTY INTL AP, NJ Click column heading to sort ascending, click again to sort descending. Year Dec Jan Feb Season 2020-2021 11.9 3.2 30.6 45.7 Monthly Highest Max Temperature for NEWARK LIBERTY INTL AP, NJ Click column heading to sort ascending, click again to sort descending. Year Jun Jul Aug Season 2021 103 97 99 103

Long Island is close to its 9th top 10 warmest average summer temperature since 2010. Time Series Summary for ISLIP-LI MACARTHUR AP, NY Click column heading to sort ascending, click again to sort descending. Rank Year Mean Avg Temperature Missing Count 1 2010 74.7 0 2 2020 74.6 0 3 1999 74.5 0 4 2016 74.4 0 5 2011 73.9 0 6 2019 73.8 0 7 2021 73.7 5 8 2018 73.5 0 - 2005 73.5 0 9 2013 73.4 0 10 2012 73.3 0 - 1991 73.3 0

100° heat index on the South Shore with a 77° dew point. Wantagh 88 77 HX 100

The SSTs are peaking later this year than recent summers. Notice the upper 70s ocean temperatures now from the Jersey Shore to the LI South Shore. STATION/POSITION TIME SKY/WX TEMP WIND PRES VSBY WAVE AIR SEA DIR/SP/G HT/PER (UTC) (F) (DEG/KT/KT) (MB) (MI) (FT/S) NY Harb Entrance 1650 77 170/ 8/ 10 1019.3 2/ 6 20 S Fire Island 1650 75 1019.7 2/ 6 Great South Bay 1630 80 81 220/ 8/ 10 N/A 23 SSW Montauk P 1650 74 72 240/ 6/ 8 1019.8 2/ 6 15 E Barnegat Li 1656 78 N/A 2/13 Hudson Canyon 1650 78 78 230/ 8/ 10 1020.8 2/12

Just because it gets a sea breeze first, doesn’t mean there are any problems with the temperatures. Wantagh is currently 87/74 with a very humid sea breeze. Farmingdale a little further from the shore is 90/71.

Tomorrow will be the 50th day this year with a 70° dew point. We have never had 6 consecutive years with 50 days before. So the consistently high dew points are a big part of our new subtropical climate.

It wouldn’t be a surprise if we find a way to pick up more measurable rainfall this weekend. There were only two weekends since the Memorial Day weekend with no rainfall. So my guess this is probably a new record for the summer season. NYC weekends May 29-30 1.35 Jun 5-6 dry Jun 12-13. .01 Jun 19-20 .14 Jun 26-27 .04 Jul 3-4 .34 Jul 10-11 .28 Jul 17-18 .65 Jul 24-25 .45 Jul 31-Aug 1 .04 Aug 7-8 .21 Aug 14-15 dry Aug 21-22 7.12

Really large divergence between the area and extent in the Beaufort and Chuckchi.

After record warmth in June and a pullback of the heat in a July, the heat is coming on strong in August. Even Long Island is seeing impressive heat for August. This is only the 8th August at Islip to reach 5 days of 90°. Time Series Summary for ISLIP-LI MACARTHUR AP, NY - Month of Aug Click column heading to sort ascending, click again to sort descending. Rank Year Number of Days Max Temperature >= 90 Missing Count 1980 8 0 2016 7 0 - 2005 7 0 1995 6 0 2021 5 6 - 2018 5 0 - 2006 5 0 - 2002 5 0

Islip tied the record high and Newark missed by 1°. RECORD EVENT REPORT NATIONAL WEATHER SERVICE NEW YORK, NY 0441 PM EDT WED AUG 25 2021 ...RECORD HIGH TEMPERATURE TIED AT ISLIP NY... A RECORD HIGH TEMPERATURE OF 92 WAS SET AT ISLIP NY TODAY. THIS TIES THE OLD RECORDS OF 92 SET IN 1998 AND 1969. CLIMATE REPORT NATIONAL WEATHER SERVICE NEW YORK, NY 437 PM EDT WED AUG 25 2021 ................................... ...THE NEWARK NJ CLIMATE SUMMARY FOR AUGUST 25 2021... VALID TODAY AS OF 0400 PM LOCAL TIME. CLIMATE NORMAL PERIOD 1991 TO 2020 CLIMATE RECORD PERIOD 1893 TO 2021 WEATHER ITEM OBSERVED TIME RECORD YEAR NORMAL DEPARTURE LAST VALUE (LST) VALUE VALUE FROM YEAR NORMAL ................................................................... TEMPERATURE (F) TODAY MAXIMUM 96 255 PM 97 1993 84 12 92 MINIMUM 73 509 AM 48 1940 67 6 73 AVERAGE 85 75 10 83

Heat indices approaching 100° in NJ. Newark/Liberty MOSUNNY 95 66 38 VRB5 30.08F HX 98 Somerville SUNNY 92 71 50 CALM 30.07F HX 98

You are pretty much just talking about the immediate shore areas. We have had one top 10 hottest summer after another for the last 10 years. Outside of places like JFK, a SW flow can be very hot also. But JFK has been leading the area in highest dew points since the record humidity increase in 2016. So the the higher heat indices at a place like JFK can make it feel as hot without all the 90° days like a westerly flow summer has at the South Shore.

87/68 here. Once the winds pick up, the higher dew points to our south and west will work in. Thursday into Friday looks like the highest dew points ahead of the front.

I wonder how the Euro seasonal was able to do so well with a summer 500mb forecast for North America issued on May 1st? It turned out to be a battle between the WAR and the ridge over Western North America. People would really take notice if the Euro ever did this well with a winter forecast.

Boston is currently in 1st place for warmest summer. But it’s doing it with July being the coolest summer month. Has this ever happened before at an Eastern US weather station? Monthly Mean Avg Temperature for Boston Area, MA (ThreadEx) Click column heading to sort ascending, click again to sort descending. Year Jun Jul Aug Season 2021 74.4 72.4 76.4 74.4 1983 70.7 78.0 73.6 74.1 1949 71.6 76.3 74.4 74.1 1994 71.9 77.5 72.4 73.9 2019 68.2 78.7 74.1 73.7 2018 67.7 76.1 77.4 73.7 2016 68.4 76.1 76.4 73.6 2010 70.3 77.2 73.4 73.6 1952 70.6 77.5 72.2 73.4 1984 70.5 74.7 74.6 73.3 1973 70.0 74.2 74.8 73.0 2020 69.2 75.3 74.1 72.9 2013 69.6 77.1 72.1 72.9 2011 67.1 77.3 73.9 72.8 1991 70.0 74.6 73.7 72.8 1955 66.8 77.2 74.5 72.8

The current heatwave is helping Newark maintain the 4th warmest summer position. This is the first time since 2010 and 2011 that Newark had two consecutive top 10 warmest summers. So the strongest heat is focused west of the Hudson this year rather than east last summer. So LGA and EWR have traded places from last year. Time Series Summary for NEWARK LIBERTY INTL AP, NJ Click column heading to sort ascending, click again to sort descending. Rank Year Mean Avg Temperature Missing Count 1 1993 79.2 0 2 2010 78.7 0 3 1994 78.5 0 4 2021 78.2 7 5 2011 78.0 0 6 2005 77.8 0 7 1988 77.7 0 8 2020 77.6 0 - 2016 77.6 0 - 1973 77.6 0 9 1999 77.1 0 10 1995 77.0 0 Time Series Summary for LAGUARDIA AIRPORT, NY Click column heading to sort ascending, click again to sort descending. Rank Year Mean Avg Temperature Missing Count 1 2020 79.5 0 2 2010 79.1 0 3 2016 78.8 0 4 2005 78.0 0 5 2018 77.9 0 6 1966 77.5 0 7 2021 77.4 7 - 2006 77.4 0 - 1999 77.4 0 8 2019 77.3 0 - 2012 77.3 0 - 1991 77.3 0 9 1994 77.2 0 10 1995 77.1 0

The dew points have already begun to rise here on the South Shore. JFK is on track for its first six year stretch of 50 days with 70°+ dew points.

Yeah, looks like a weaker and further SW version of the 1991 perfect storm.

Today will probably be the lowest humidity of the heatwave as dew points are really high to our west.

1983 held on as the wettest year at JFK since they missed some of the most extreme rainfall in 2011. My wettest 12 hr and 24 hr record was the 10”+ on 8-14-11 in Long Beach.The wettest year at EWR and LGA was 2011. NASSAU COUNTY... LIDO BEACH 10.87 625 PM 8/14 SKYWARN SPOTTER WANTAGH 10.08 725 PM 8/14 SKYWARN SPOTTER ASOS ...QUEENS COUNTY... NYC/JFK AIRPORT 7.72 919 PM 8/14 ASOS Time Series Summary for JFK INTERNATIONAL AIRPORT, NY - Jan through Dec Click column heading to sort ascending, click again to sort descending. Rank Year Total Precipitation Missing Count 1 1983 59.12 0 2 2018 57.40 0 3 1975 57.18 0 4 2011 55.78 0 5 1989 55.73 0 Time Series Summary for NEWARK LIBERTY INTL AP, NJ - Jan through Dec Click column heading to sort ascending, click again to sort descending. Rank Year Total Precipitation Missing Count 1 2011 69.91 0 2 1983 65.50 0 3 2018 59.47 0 4 1984 59.01 0 5 2019 58.56 0 Time Series Summary for LAGUARDIA AIRPORT, NY - Jan through Dec Click column heading to sort ascending, click again to sort descending. Rank Year Total Precipitation Missing Count 1 2011 65.34 0 2 1983 60.84 0 3 1975 60.79 0 4 2018 58.84 0 5 1989 55.22 0