bluewave

Our snowfall variation has become much more extreme since the 1990s. It’s either a much above normal season or much below. Those mid 20s snowfall seasons that used to be common have become few and far between.

We will find out next winter. Making a third consecutive below normal snowfall season would be a first since the 1980s and 1990s. Ever since 2002-2003, our only back to back down snowfall years were 06-07 to 07-08 along with 18-19 to 19-20.

You wonder if we can ever top the 09-10 to 17-18 period for snowfall. We broke just about every previous snowfall record with the exception of 95-96. I guess we will find out if it was just a transition period.

At least the rate that the trees were dropping leaves has slowed a bit in the last few days. But now I have some trees that are totally bare on the south side with leaves only on the north side. The landscapers have been doing some early fall leaf clean ups.

The heat Island around Central Park has been fairly constant for a long time now. This recent rise is a result of warmer overall temperatures. You can see similar similar cool temperature benchmarks getting pushed back in the surrounding areas also.

NYC has had to wait longer for its first 50s after a late summer cold front. It used to be common for the first 50s to arrive during August. But now more and more years don’t get the first 50s until September. NYC reached the monthly low so far of 62° today. First/Last Summary for NY CITY CENTRAL PARK, NY Each section contains date and year of occurrence, value on that date. Click column heading to sort ascending, click again to sort descending. Year Last Value First Value Difference Minimum 06-09 (2017) 08-15 (2013) 56 Mean 06-16 09-06 81 Maximum 06-27 (2015) 09-17 (2016) 94 2019 06-14 (2019) 58 09-06 (2019) 58 83 2018 06-12 (2018) 57 09-09 (2018) 55 88 2017 06-09 (2017) 53 09-01 (2017) 55 83 2016 06-14 (2016) 58 09-17 (2016) 59 94 2015 06-27 (2015) 58 09-14 (2015) 59 78 2014 06-15 (2014) 59 09-13 (2014) 58 89 2013 06-19 (2013) 59 08-15 (2013) 59 56 2012 06-26 (2012) 58 09-10 (2012) 58 75 2011 06-15 (2011) 56 08-29 (2011) 59 74 2010 06-11 (2010) 58 09-11 (2010) 59 91 First/Last Summary for NY CITY CENTRAL PARK, NY Each section contains date and year of occurrence, value on that date. Click column heading to sort ascending, click again to sort descending. Year Last Value First Value Difference Minimum 06-12 (2006) 08-07 (2004) 16 Mean 06-27 08-25 58 Maximum 07-24 (2007) 09-11 (2005) 82 2009 07-08 (2009) 58 09-01 (2009) 57 54 2008 06-19 (2008) 57 08-11 (2008) 59 52 2007 07-24 (2007) 58 08-10 (2007) 57 16 2006 06-12 (2006) 56 09-02 (2006) 59 81 2005 06-20 (2005) 59 09-11 (2005) 58 82 2004 06-20 (2004) 57 08-07 (2004) 59 47 2003 06-23 (2003) 57 09-02 (2003) 59 70 2002 06-18 (2002) 58 09-01 (2002) 59 74 2001 07-03 (2001) 58 09-02 (2001) 58 60 2000 07-08 (2000) 58 08-19 (2000) 59 41 First/Last Summary for NY CITY CENTRAL PARK, NY Each section contains date and year of occurrence, value on that date. Click column heading to sort ascending, click again to sort descending. Year Last Value First Value Difference Minimum 06-10 (1983) 08-08 (1989) 38 Mean 06-26 08-24 58 Maximum 07-09 (1984) 09-11 (1980) 81 1989 06-30 (1989) 58 08-08 (1989) 56 38 1988 07-02 (1988) 58 08-22 (1988) 56 50 1987 06-24 (1987) 58 08-24 (1987) 57 60 1986 07-04 (1986) 55 08-25 (1986) 58 51 1985 06-28 (1985) 56 09-01 (1985) 58 64 1984 07-09 (1984) 59 09-05 (1984) 56 57 1983 06-10 (1983) 52 08-14 (1983) 59 64 1982 06-14 (1982) 54 08-21 (1982) 59 67 1981 06-27 (1981) 58 08-17 (1981) 59 50 1980 06-21 (1980) 59 09-11 (1980) 57 81

MPO finally ended their record above 50° streak. All the top 5 records are since 2012. MOUNT POCONO CLEAR 47 45 93 CALM Number of Consecutive Days Min Temperature >= 50 for MOUNT POCONO POCONO MOUNTAINS MUNICIPAL AP, PA Click column heading to sort ascending, click again to sort descending. Rank Run Length Ending Date 1 63 2020-08-19 2 60 2019-08-23 3 48 2016-08-21 - 48 2008-08-12 4 45 2013-08-04 5 43 2012-08-18

It’s especially scary when you or your property are at risk for getting hit by falling trees in such high winds. I believe the only comparable Derecho event in the Northeast was the Adirondack blowdown in July 1995. While the Labor Day Derecho in September 1998 was impressive here, the intensity and duration of the strongest winds wasn’t nearly as great. https://www.spc.noaa.gov/misc/AbtDerechos/casepages/jul1995derechopage.htm https://www.adirondackalmanack.com/2009/07/anniversary-of-the-great-adirondack-blowdown-of-1995.html

The Euro had chances for convection across the area with the 12z run yesterday. But people often don’t pay attention when the NAM is dry. 12z Tue run 0z Wed

The local NWS has the radar loop in their summary. Easily winds over 80 mph. You can also see that area was near where the peak gusts were in the 100 to 130 mph range. https://www.weather.gov/dvn/summary_081020 A powerful line of severe thunderstorms known as a "Derecho" tracked across eastern Iowa and northwest Illinois on the afternoon of Monday, August 10th producing widespread straight line wind damage. A swath of damage from Benton County, through portions of Linn, Jones, and Cedar Counties, is consistent with intermittent winds in the 110-130 mph range. A radio transmission tower north of Marion, Iowa in Linn County collapsed, due to straight line winds estimated around 130 mph. This speed would be equivalent to a strong EF2 tornado. The maximum measured wind gust was 112 mph at Midway, Iowa in Linn County.

Long duration damaging winds with this derecho. Almost looks like you are watching a RFQ of a major hurricane cross the Gulf or Southeast Coast. Watching this 30 minute video gives you an idea why the damage was so extreme.

Impressive training event for the Twin Forks. Station Number: NY-SF-140 Station Name: Amagansett 1.5 E Observation Date 8/18/2020 9:00 AM Submitted 8/18/2020 9:49 AM Total Precip Amount 2.41 in.

This was the heaviest rain event for Eastern LI in a while. 2.52” at the Southhold mesonet. They picked up 1.12” of that total in just 15 minutes. http://www.nysmesonet.org/mesonow#network=nysm&stid=sout Liquid-Equivalent Precipitation 6 hours: 2.32″ 1 day: 2.52″ 3 days: 3.08″ 7 days: 3.17″

Yeah, interesting geographic pattern to the record heat. A more intense version of last July. The previous record warmest July in Phoenix was 2009.

Some very impressive extremes around the EPAC region.

The record 65° streak for EWR and NYC ended this morning. Number of Consecutive Days Min Temperature >= 65 for NEWARK LIBERTY INTL AP, NJ Click column heading to sort ascending, click again to sort descending. Rank Run Length Ending Date 1 59 2020-08-16 2 57 2011-08-11 3 55 2003-08-17 - 55 1994-08-04 4 52 2010-08-24 5 47 2019-08-10 Number of Consecutive Days Min Temperature >= 65 for NY CITY CENTRAL PARK, NY Click column heading to sort ascending, click again to sort descending. Rank Run Length Ending Date 1 60 2020-08-16 2 58 2005-09-05 3 57 2018-09-07 4 55 1906-08-31 5 52 2010-08-23

This may be the new all-time record if gets verified. That 1913 reading looks like it may have been an error. So they should probably review that record when thy do this one. https://www.washingtonpost.com/news/capital-weather-gang/wp/2016/10/25/new-analysis-shreds-claim-that-death-valley-recorded-earths-hottest-temperature-in-1913/ Oct. 25, 2016 at 3:57 p.m. EDT Death Valley, Calif., boasts that it is home to the highest temperature ever recorded on Earth. In 1913, the temperature there reportedly spiked to a blistering 134 degrees, a world record that has been endorsed by the World Meteorological Organization. But an exhaustive analysis published Monday has determined the record is not legitimate. The temperature reported was “essentially not possible from a meteorological perspective,” according to geographer and climatologist William T. Reid, who conducted the analysis, and Christopher Burt, an expert on weather extreme, who assisted Reid. Reid and Burt conclude the weather observer erred in taking the measurement, officially logged at Greenland Ranch at Furnace Creek in Death Valley on July 10, 1913. Reid and Burt, who published their 7,000-word critique of the record at Weather Underground, identified three main problems with the temperature measurement.

LGA ended their 70° streak yesterday. JFK finally dipped below 65° today. MPO dropped to 52° ending their longest 55° streak. The margin on the new MPO record was even bigger than the LGA one.Very impressive for around 1900 feet elevation in NE PA. Number of Consecutive Days Min Temperature >= 65 for JFK INTERNATIONAL AIRPORT, NY Click column heading to sort ascending, click again to sort descending. Rank Run Length Ending Date 1 62 1980-09-07 2 59 2015-08-27 3 57 2020-08-16 4 52 2011-08-22 5 47 2019-08-10 Number of Consecutive Days Min Temperature >= 55 for Mount Pocono Area, PA (ThreadEx) Click column heading to sort ascending, click again to sort descending. Rank Run Length Ending Date 1 50 2020-08-16 2 32 1938-08-18 - 32 1919-06-27 3 31 2013-07-23 Number of Consecutive Days Min Temperature >= 70 for LAGUARDIA AIRPORT, NY Click column heading to sort ascending, click again to sort descending. Rank Run Length Ending Date 1 44 2020-08-15 2 34 2006-08-10 3 32 1980-08-15 4 29 2018-08-19 5 28 2010-07-30

The Islip streak continues.... Number of Consecutive Days Min Temperature >= 60 for ISLIP-LI MACARTHUR AP, NY Click column heading to sort ascending, click again to sort descending. Rank Run Length Ending Date 1 63 1967-08-31 2 62 2015-08-28 3 61 2003-08-23 4 60 2020-08-16 5 58 2005-09-05

Yeah, the NAM did a fantastic job with the January 2016 blizzard.

White Plains finally ended their record streak of 60° or warmer days. White Plains PTCLDY 59 57 93 NW6 Number of Consecutive Days Min Temperature >= 60 for WESTCHESTER CO AP, NY Click column heading to sort ascending, click again to sort descending. Rank Run Length Ending Date 1 58 2020-08-16 2 53 2012-08-18 3 51 2008-08-15 - 51 1970-08-19 4 49 2016-08-21 5 45 1988-08-18 6 44 2019-08-07 - 44 2018-08-22 - 44 2005-08-17 7 42 2013-08-03

MPO is the higher elevation interior version of the streak. Number of Consecutive Days Min Temperature >= 55 for Mount Pocono Area, PA (ThreadEx) Click column heading to sort ascending, click again to sort descending. Rank Run Length Ending Date 1 49 2020-08-15 2 32 1938-08-18 - 32 1919-06-27 3 31 2013-07-23 4 24 2004-08-04 - 24 1947-08-31 5 23 1917-08-03 - 23 1916-07-28 Number of Consecutive Days Min Temperature >= 70 for LAGUARDIA AIRPORT, NY Click column heading to sort ascending, click again to sort descending. Rank Run Length Ending Date 1 44 2020-08-15 2 34 2006-08-10 3 32 1980-08-15 4 29 2018-08-19 5 28 2010-07-30

With all the clouds and rain, White Plains has a chance to break its record 75° high temperature streak. It’s currently tied for 1st place with 2006 at 60 days. But it looks like the record 60° minimum streak will continue. Number of Consecutive Days Max Temperature >= 75 for WESTCHESTER CO AP, NY Click column heading to sort ascending, click again to sort descending. Rank Run Length Ending Date 1 60 2020-08-15 - 60 2006-08-24 2 57 1966-08-09 3 55 2016-09-02 - 55 2010-08-11 4 52 2015-09-13 5 51 2003-08-30 Number of Consecutive Days Min Temperature >= 60 for WESTCHESTER CO AP, NY Click column heading to sort ascending, click again to sort descending. Rank Run Length Ending Date 1 57 2020-08-15 2 53 2012-08-18 3 51 2008-08-15 - 51 1970-08-19 4 49 2016-08-21 5 45 1988-08-18 6 44 2019-08-07 - 44 2018-08-22 - 44 2005-08-17 7 42 2013-08-03