bluewave

Another day of 70° minimums across the area. This puts many of our stations in 1st place from June 1st to August 23rd. White Plains set the new record for 65° minimums. POU to our north has the new record for 60° lows. Time Series Summary for NEWARK LIBERTY INTL AP, NJ Click column heading to sort ascending, click again to sort descending. Rank Ending Date Number of Days Min Temperature >= 70 Jun 1 to Aug 23 Missing Count 1 2010-08-23 50 0 - 1973-08-23 50 0 2020-08-23 50 0 Time Series Summary for NY CITY CENTRAL PARK, NY Click column heading to sort ascending, click again to sort descending. Rank Ending Date Number of Days Min Temperature >= 70 Jun 1 to Aug 23 Missing Count 1 1908-08-23 52 0 2 2020-08-23 52 0 Time Series Summary for LAGUARDIA AIRPORT, NY Click column heading to sort ascending, click again to sort descending. Rank Ending Date Number of Days Min Temperature >= 70 Jun 1 to Aug 23 Missing Count 1 2006-08-23 61 0 2 2020-08-23 60 0 Time Series Summary for IGOR I SIKORSKY MEMORIAL AIRPORT, CT Click column heading to sort ascending, click again to sort descending. Rank Ending Date Number of Days Min Temperature >= 70 Jun 1 to Aug 23 Missing Count 1 2020-08-23 36 4 2 2016-08-23 34 0 Time Series Summary for ISLIP-LI MACARTHUR AP, NY Click column heading to sort ascending, click again to sort descending. Rank Ending Date Number of Days Min Temperature >= 70 Jun 1 to Aug 23 Missing Count 1 2010-08-23 31 0 - 1988-08-23 31 0 2020-08-23 31 0 Time Series Summary for WESTCHESTER CO AP, NY Click column heading to sort ascending, click again to sort descending. Rank Ending Date Number of Days Min Temperature >= 65 Jun 1 to Aug 23 Missing Count 1 2020-08-23 51 1 2 2019-08-23 47 1 - 2010-08-23 47 2 Time Series Summary for POUGHKEEPSIE AIRPORT, NY Click column heading to sort ascending, click again to sort descending. Rank Ending Date Number of Days Min Temperature >= 60 Jun 1 to Aug 23 Missing Count 1 2020-08-23 63 1 - 1973-08-23 62 0

BDL reached 93° today. So they are just 1 short of their all time 90° day record of 38 days in 1983. Time Series Summary for HARTFORD-BRADLEY INTERNATIONAL AIRPORT, CT - 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 1983 38 0 2 2020 37 132 3 2002 35 0 4 2010 34 0 - 1965 34 0 5 2018 32 0 - 1966 32 0 6 2016 31 0 - 1991 31 0 - 1949 31 3 7 1988 30 0 - 1973 30 0 8 2005 29 0 9 1999 28 0 10 2019 27 0

I agree that the MYI loss is the big story. https://climate.nasa.gov/news/2817/with-thick-ice-gone-arctic-sea-ice-changes-more-slowly/ With thick ice gone, Arctic sea ice changes more slowly The Arctic Ocean's blanket of sea ice has changed since 1958 from predominantly older, thicker ice to mostly younger, thinner ice, according to new research published by NASA scientist Ron Kwok of the Jet Propulsion Laboratory, Pasadena, California. With so little thick, old ice left, the rate of decrease in ice thickness has slowed. New ice grows faster but is more vulnerable to weather and wind, so ice thickness is now more variable, rather than dominated by the effect of global warming. Working from a combination of satellite records and declassified submarine sonar data, NASA scientists have constructed a 60-year record of Arctic sea ice thickness. Right now, Arctic sea ice is the youngest and thinnest its been since we started keeping records. More than 70 percent of Arctic sea ice is now seasonal, which means it grows in the winter and melts in the summer, but doesn't last from year to year. This seasonal ice melts faster and breaks up easier, making it much more susceptible to wind and atmospheric conditions. Working from a combination of satellite records and declassified submarine sonar data, NASA scientists have constructed a 60-year record of Arctic sea ice thickness. Right now, Arctic sea ice is the youngest and thinnest its been since we started keeping records. More than 70 percent of Arctic sea ice is now seasonal, which means it grows in the winter and melts in the summer, but doesn't last from year to year. This seasonal ice melts faster and breaks up easier, making it much more susceptible to wind and atmospheric conditions. Kwok's research, published today in the journal Environmental Research Letters, combined decades of declassified U.S. Navy submarine measurements with more recent data from four satellites to create the 60-year record of changes in Arctic sea ice thickness. He found that since 1958, Arctic ice cover has lost about two-thirds of its thickness, as averaged across the Arctic at the end of summer. Older ice has shrunk in area by almost 800,000 square miles (more than 2 million square kilometers). Today, 70 percent of the ice cover consists of ice that forms and melts within a single year, which scientists call seasonal ice. Sea ice of any age is frozen ocean water. However, as sea ice survives through several melt seasons, its characteristics change. Multiyear ice is thicker, stronger and rougher than seasonal ice. It is much less salty than seasonal ice; Arctic explorers used it as drinking water. Satellite sensors observe enough of these differences that scientists can use spaceborne data to distinguish between the two types of ice. Thinner, weaker seasonal ice is innately more vulnerable to weather than thick, multiyear ice. It can be pushed around more easily by wind, as happened in the summer of 2013. During that time, prevailing winds piled up the ice cover against coastlines, which made the ice cover thicker for months. The ice's vulnerability may also be demonstrated by the increased variation in Arctic sea ice thickness and extent from year to year over the last decade. In the past, sea ice rarely melted in the Arctic Ocean. Each year, some multiyear ice flowed out of the ocean into the East Greenland Sea and melted there, and some ice grew thick enough to survive the melt season and become multiyear ice. As air temperatures in the polar regions have warmed in recent decades, however, large amounts of multiyear ice now melt within the Arctic Ocean itself. Far less seasonal ice now thickens enough over the winter to survive the summer. As a result, not only is there less ice overall, but the proportions of multiyear ice to seasonal ice have also changed in favor of the young ice. Seasonal ice now grows to a depth of about six feet (two meters) in winter, and most of it melts in summer. That basic pattern is likely to continue, Kwok said. "The thickness and coverage in the Arctic are now dominated by the growth, melting and deformation of seasonal ice." The increase in seasonal ice also means record-breaking changes in ice cover such as those of the 1990s and 2000s are likely to be less common, Kwok noted. In fact, there has not been a new record sea ice minimum since 2012, despite years of warm weather in the Arctic. "We've lost so much of the thick ice that changes in thickness are going to be slower due to the different behavior of this ice type," Kwok said. Kwok used data from U.S. Navy submarine sonars from 1958 to 2000; satellite altimeters on NASA's ICESat and the European CryoSat-2, which span from 2003 to 2018; and scatterometer measurements from NASA's QuikSCAT and the European ASCAT from 1999 to 2017.

That SE Ridge has been at near record levels since the La Niña background state began in 16-17. Even with the record warmth in 16-17 and 17-18, the ridge north of Hawaii was able to focus near Alaska. So we got both a warm and snowy pattern. But in 18-19 and 19-20 that NPAC Ridge was further south creating a snowless pattern for us. So we’ll have to see what that ridge does this winter since it looks like a 5th year in a row with a Niña background state. The ridge centered near Alaska also allows heights to build over the top and drop the NAO at times. Last winter ridge too far south near Hawaii was associated with the strong PV +EPO/+NAO.

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.