bluewave

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

Yeah, today is the 36th day to reach 90° at Newark. The airport finished the season with 45.7” of snow. So this could only be the 2nd time on record along with 2010 to reach 40” of snow and 40 days of 90°. 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 >= 90 Snowfall 1 2010 54 47.9 2 1993 49 28.8 3 1988 43 22.8 4 2002 41 3.6 - 1991 41 21.5 5 2016 40 32.8 - 1983 40 31.0 - 1959 40 17.8

They actually found the problem but never corrected the rainfall totals for the year. While the spring 1983 rainfall was memorable, it was no match for the extreme rainfall that occurred in August into September 2011 and October 2005. Maximum 30-Day Total Precipitation for NEWARK LIBERTY INTL AP, NJ Click column heading to sort ascending, click again to sort descending. Rank Value Ending Date Missing Days 1 22.28 2011-09-12 0 https://www.bnl.gov/newsroom/news.php?a=110406 In October, record rainfall of 22.14 inches soaked the ground, causing local flooding. "October 2005 was by far the wettest month in the last 57 years that the Lab has been keeping weather statistics, with almost double the amount of rain recorded in any October, and easily beating the previous monthly 13.01 inches of record rain in January 1979," said Victor Cassella, a Brookhaven Lab meteorologist. "We received 17.23 inches of rain in five consecutive days, from October 10 to 15, with 9 inches on October 14. Only in 1954, when Hurricane Edna dumped 9.02 inches of rain, did we get more than that amount of rain in one day."

I am not sure if they know which month the rain gauge broke in 1983. Newark had two successive months of 10+ In March and April like was shown at NYC. So NYC could have done it if the malfunction occurred after April. Monthly Total Precipitation for NEWARK LIBERTY INTL AP, NJ Click column heading to sort ascending, click again to sort descending. Year Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec Annual 1983 4.37 3.03 11.14 11.14 4.22 2.81 1.59 3.46 2.93 5.80 5.54 9.47 65.50 Monthly Total Precipitation for NY CITY CENTRAL PARK, NY Click column heading to sort ascending, click again to sort descending. Year Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec Annual 1983 5.01 3.22 10.54 14.01 4.60 2.82 3.40 7.26 4.62 8.63 6.68 9.77 80.56

That was the year of the broken rain gauge in NYC. So we may never really know the exact rainfall in 1983. While it was a very wet year, the NYC totals were significantly higher than surrounding stations. https://www.nytimes.com/1983/12/31/nyregion/city-s-rain-83-record-is-in-doubt.html The heavy rains that pounded New York City during 1983 may not have broken the annual rainfall record here, after all, the National Weather Service said yesterday. The only thing broken for certain, it said, was the official rain gauge in Central Park. To no one's surprise, the Weather Service announced on Nov. 15 that the year's drenching rains in Manhattan had surpassed a record of 67.04 inches, set in 1972. As of early yesterday, additional rains were said to have brought the year's total to 80.56 inches. But the Weather Service's data acquisition division in Garden City, L.I., suspected something was amiss because the Central Park readings were much higher than official measurements at Kennedy International, Newark International and La Guardia Airports. So the gauge at Belvedere Castle in the park was taken apart. It was found to be leaky. A faulty weld apparently was allowing water to seep in the side and be measured with rain entering the calibrated opening. No one knows how much rain fell in the park in 1983. But the Weather Service said that an official estimate based on nearby readings would be made and that ''it likely will be close to the record, either just above or just below.''

NYC is on the verge of having its first July and August to both reach 10” of rain. Three Julys and three Augusts picked up 10”. But never before in the same summer. This only occasionally happens in Miami. The last summer there to do this was 2019. Monthly Total Precipitation for NY CITY CENTRAL PARK, NY Click column heading to sort ascending, click again to sort descending. Year Jul Aug Season 1889 11.89 4.27 16.16 1975 11.77 3.05 14.82 2021 11.09 9.65 20.74 Monthly Total Precipitation for NY CITY CENTRAL PARK, NY Click column heading to sort ascending, click again to sort descending. Year Jul Aug Season 2011 3.03 18.95 21.98 1990 3.51 12.36 15.87 1955 0.51 10.86 11.37 Monthly Total Precipitation for Miami Area, FL (ThreadEx) Click column heading to sort ascending, click again to sort descending. Year Jul Aug Season Mean 8.70 9.91 18.61 2021 8.18 5.52 13.70 2020 10.26 7.44 17.70 2019 10.54 15.74 26.28 2018 8.02 9.58 17.60 2017 12.45 8.57 21.02 2016 4.11 13.77 17.88 2015 5.91 9.02 14.93 2014 10.29 9.07 19.36 2013 12.70 4.43 17.13 2012 8.92 15.92 24.84 2011 5.71 11.08 16.79 2010 7.36 8.75 16.11