bluewave

That stack is scheduled to be removed. https://www.bnl.gov/stakeholder/docs/CAC/sattler-stack-cac-final-sept-2019.pdf

Warmest day of summer so far at JFK with a high of 91 degrees. http://wxweb.meteostar.com/meteogram/link.shtml?choice=Kjfk

97 in Philly. PHILADELPHIA MOSUNNY 97 60 29 NW12G21 29.84F HX 97

Impressive low 80s at 7am. New York City Metropolitan Area Weather Roundup National Weather Service New York NY 700 AM EDT FRI JUL 03 2020 CITY SKY/WX TMP DP RH WIND PRES REMARKS Central Park SUNNY 79 63 57 VRB3 29.86R LaGuardia Arpt MOSUNNY 81 63 54 NW5 29.82R Kennedy Intl PTSUNNY 81 64 56 NW8 29.82R Newark Liberty MOSUNNY 82 62 50 NW8 29.82R Teterboro Arpt SUNNY 77 64 64 N6 29.82R Bronx Lehman C N/A 77 66 69 NW3 N/A Queens College N/A 81 64 57 NW3 N/A Breezy Point N/A 77 N/A N/A NW3 N/A Brooklyn Coll N/A 81 64 57 NW8 N/A Staten Island N/A 77 66 69 N2 N/A

The LGA temperatures are in line with the surrounding area. But the departures have seen a big jump. So it could just be the temperatures in that part of the city rising the most relative to the 80s and 90s.

First 90 of the season at JFK. https://forecast.weather.gov/product.php?site=NWS&issuedby=JFK&product=CLI&format=CI&version=1&glossary=1&highlight=off The actual temperature in the sun at Central Park is probably close to EWR and LGA. But the deep shade where the sensor is runs a few degrees cooler than open areas like the Great Lawn. I am willing to bet the open areas of Central Park probably came close to 50 days reaching 90 in 2010.

Impressive stretch of early July heat on the 12z Euro today.

First 95 of the season at Newark with warm downslope flow. http://wxweb.meteostar.com/meteogram/link.shtml?choice=KEWR

Maybe close to 60 days if we get a dry enough pattern with the mean ridge position nearby. 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 Missing Count 1 2010 54 0 2 1993 49 0 3 1988 43 0 4 2002 41 0 - 1991 41 0 5 2016 40 0 - 1983 40 0 - 1959 40 0

We are catching up on the 90 degree days after a slow start. Time Series Summary for NEWARK LIBERTY INTL AP, NJ Click column heading to sort ascending, click again to sort descending. Ending Date Number of Days Max Temperature >= 90 Jan 1 to Jul 2 Missing Count 2020-07-02 6 0 2019-07-02 6 0 2018-07-02 11 0 2017-07-02 9 0 2016-07-02 6 0 2015-07-02 6 0 2014-07-02 4 0 2013-07-02 6 0 2012-07-02 10 0 2011-07-02 6 0 2010-07-02 16 0

90 at Newark with a warm northerly flow.

Today looks like an overperforming downslope day. HRRR has low 90s for areas that get into the NNW flow.

Pretty extreme rainfall rates in Harrison. Looks like they picked up 1.46 in just 14 minutes. Total of 2.79 in a little over an hour. https://mesowest.utah.edu HSNN4 Harrison 13:16 66.0 64.2 64.9 94 0.0 3.0 29.84 29.86 2.79 2.79 OK 13:02 65.0 62.9 63.7 93 0.0 0.0 29.85 29.87 2.79 2.79 OK 12:47 66.0 63.0 64.1 90 0.0 1.0 29.86 29.88 2.73 2.73 OK 12:31 67.0 63.0 64.4 87 0.0 5.0 29.86 29.88 1.87 1.87 OK 12:17 73.0 64.6 67.3 75 5.0 10.0 N 29.87 29.89 0.41 0.41 OK 12:03 76.0 66.7 69.6 73 0.0 3.0 29.83 29.85 0.00 0.00

Looks like another warmer than average July coming up. Models have a 590+DM heat dome building over the Plains and Midwest. So that will probably be our first extended stretch of widespread 90s across the region.

It will be interesting to see if the Euro is correct about the slower backdoor cold front on Friday. The model actually has upper 90s to our south. We were discussing the unusual WAA from SE Canada ahead of the front.

Yes. It was the first 71 degree or warmer June at JFK not to reach 90 degrees.

We’ll need some help from convection later for several stations to avoid their driest June since 2010. Time Series Summary for NEWARK LIBERTY INTL AP, NJ - Month of Jun Click column heading to sort ascending, click again to sort descending. Year Total Precipitation Missing Count 2020 1.45 1 2019 6.00 0 2018 1.87 0 2017 5.29 0 2016 2.40 0 2015 5.90 0 2014 4.41 0 2013 8.74 0 2012 5.02 0 2011 2.74 0 2010 2.37 0 Time Series Summary for NY CITY CENTRAL PARK, NY - Month of Jun Click column heading to sort ascending, click again to sort descending. Year Total Precipitation Missing Count 2020 1.76 1 2019 5.46 0 2018 3.11 0 2017 4.76 0 2016 2.60 0 2015 4.79 0 2014 4.26 0 2013 10.10 0 2012 2.97 0 2011 3.25 0 2010 2.20 0 Time Series Summary for LAGUARDIA AIRPORT, NY - Month of Jun Click column heading to sort ascending, click again to sort descending. Year Total Precipitation Missing Count 2020 1.10 1 2019 4.89 0 2018 3.60 0 2017 4.38 0 2016 2.24 0 2015 4.80 0 2014 3.69 0 2013 8.16 0 2012 4.19 0 2011 3.85 0 2010 1.67 0

First June that Newark averaged 74 degrees or warmer and didn’t have a monthly maximum temperature above 93 degrees. Newark is currently at the 10th warmest June on record. But the monthly maximum of 93 degrees is the coolest for all 74 degree or warmer years. Time Series Summary for NEWARK LIBERTY INTL AP, NJ - Month of Jun Click column heading to sort ascending, click again to sort descending. Rank Year Mean Avg Temperature Max Temperature 1 1994 77.8 102 2 2010 76.2 98 3 1993 75.8 102 4 1943 75.4 102 5 2008 75.3 99 6 1984 75.0 97 7 1971 74.8 94 8 2005 74.6 97 - 1981 74.6 98 - 1973 74.6 95 9 2011 74.5 102 10 2020 74.4 93 - 1987 74.4 96 11 1989 74.3 96 12 1999 74.2 99 13 1991 74.1 97

Many people in this part of the country have never experienced hail before. So they just associate anything frozen falling from the sky with winter. Plus they don’t follow the weather as closely as we do.

Reflectivity with the hail to 68 DBZ.

First June since 2009 with no 90 degree days at JFK. The 89 today was the high for the month. Very few warm offshore flow days with the onshore flow dominating. Time Series Summary for JFK INTERNATIONAL AIRPORT, NY - Month of Jun Click column heading to sort ascending, click again to sort descending. Year Highest Max Temperature Missing Count 2020 89 1 2019 91 0 2018 91 0 2017 94 0 2016 92 0 2015 90 0 2014 91 0 2013 91 0 2012 97 0 2011 93 0 2010 98 0 2009 83 0

Warmest June at EWR and LGA since 2010 and 2011. But the monthly maximum temperatures were much lower. Fits with the highest June maximum temperatures going to our north. Time Series Summary for NEWARK LIBERTY INTL AP, NJ - Month of Jun Click column heading to sort ascending, click again to sort descending. Rank Year Mean Avg Temperature Max Temperature 1 2010 76.2 98 2 2011 74.5 102 3 2020 74.1 93 4 2013 73.3 96 5 2016 72.9 91 6 2014 72.8 92 7 2019 72.7 93 - 2017 72.7 99 8 2012 72.4 99 9 2018 72.1 96 10 2015 72.0 93 Time Series Summary for LAGUARDIA AIRPORT, NY - Month of Jun Click column heading to sort ascending, click again to sort descending. Rank Year Mean Avg Temperature Max Temperature 1 2010 76.0 96 2 2020 75.8 93 3 2013 74.0 96 4 2017 73.6 101 - 2016 73.6 90 5 2018 72.9 96 - 2012 72.9 98 6 2019 72.8 94 7 2011 72.7 97 8 2014 72.5 88 9 2015 71.3 92

A backdoor warm front on the 3rd followed by a backdoor cold front on the 4th.

My guess is that the climate has become too wet here to allow for another 1960s style drought. That was something like a 500 year drought based on the tree ring study. Ever since 2003, our dry patterns end before we get to any serious water restrictions. https://blogs.ei.columbia.edu/2012/09/06/epic-wetness-in-the-greater-new-york-city-region-and-what-broadleaf-trees-have-to-say-about-it/