bluewave

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

Brian B found a higher NYC hourly rainfall total before the trees were covering the site. This total is more in line with the airport station hourly records. The article below has a photo of the site before the excess tree growth. https://vlab.noaa.gov/web/nws-heritage/-/100-years-of-weather-observations-at-belvedere-castle-in-central-park Original sitting before the tree growth Most recent photo from 2013 with trees growing over the sensors

These record WAR patterns with such strong blocking allow new types tropical cyclone tracks. This was the first Rhode Island landfall passing within 200 miles of Bermuda. Notice the rare track through Rhode Island twice under the block. Luckily, this was minor compared to the Sandy 1 in 700 year track under the record block in 2012.

Boerum Hill on the cocorahs site. https://www.cocorahs.org

Station Number: NY-KN-25 Station Name: Brooklyn 3.1 NW

Brooklyn at 9.43 on the latest update. 08/22/2021 6.16 08/23/2021 3.27

When was the last time we had a heatwave so soon after a tropical storm or hurricane? All the guidance has the 850 mb temps rebounding to the 18-20C range. So the warm spots can make a run on 95° with high humidity.

The dense tree growth over the ASOS could be affecting the rainfall measurements in addition to the high temperatures. Notice how the new hourly record set with Henri was lower than all the other ASOS stations. Hourly rainfall records NYC…..1.94….8-21-21 JFK…..2.88….7-31-96 LGA….2.44….7-15-97 EWR…2.35….7-21-06 ISP……5.34….8-13-14

Updated for 9.43 in Brooklyn. 08/22/2021 6.16 08/23/2021 3.27

The vegetation around the sensor will probably give new meaning to tropical rainforest.

This is the 4th wettest summer on record in NYC through yesterday. Time Series Summary for NY CITY CENTRAL PARK, NY - Jun through Aug Click column heading to sort ascending, click again to sort descending. Rank Year Total Precipitation Missing Count 1 2011 25.23 0 2 1975 22.40 0 3 1989 22.36 0 4 2021 22.29 9 5 2009 21.38 0 6 2006 20.79 0 7 2007 20.62 0 8 1928 20.50 0 9 1903 20.43 0 10 1927 20.01 0

Near to record breaking 500mb heights over Eastern North America and the Western Atlantic altering the storm tracks and weather patterns. The tropical cyclone database goes back to 1851. That area around Bermuda has always been busy place for shipping. So it would be a tougher area to miss storms before the satellite era. Plus all landfalling systems near the Northeast have been well documented in the record books. Their tracks were traced back through the Atlantic. Near to record breaking 500 mb heights in the lead up to Henri

Henri is another example of how extreme the Western Atlantic Ridge has become. This is the first tropical cyclone to make landfall in Rhode Island after tracking within 200 miles of Bermuda. Absent such a strong WAR, Henri would have went harmlessly out to sea. Tracks of 350 tropical cyclones passing within 200 miles of Bermuda

NYC has had measurable rainfall nearly every weekend this summer since the Memorial Day weekend. But this was the wettest weekend by far. So it will be interesting to see if the Labor Day weekend continues this pattern. 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……49 Jul 31-Aug 1…04 Aug 7-8………21 Aug 14-15….dry Aug 21-22….6.35…so far

Parts of Brooklyn are probably over 8” by now with this band stalled out. Kings County... Brooklyn 7.82 in 0145 PM 08/22 CWOP South Slope 6.89 in 0145 PM 08/22 CWOP Prospect Park 6.88 in 0150 PM 08/22 AWS

The waterfall video was pretty wild.

Major flooding of homes in Brooklyn last night.

The rainfall total since yesterday is 3.42” in Wantagh. 1.86” so far under this stalled out band.

I never understood why building codes in Long Beach permitted slope down driveways and basements on a barrier island.

Rain continuing to get heavier here in SW Suffolk as this stalled out band really means business.