bluewave Posted August 25, 2020 Share Posted August 25, 2020 We continue with a record number of 70° minimums from June 1st through August 24th. 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 24 Missing Count 1 2020-08-24 53 0 2 1908-08-24 52 0 3 1906-08-24 50 0 4 2010-08-24 49 0 5 2005-08-24 47 0 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 24 Missing Count 1 2020-08-24 51 0 2 2010-08-24 50 0 - 1973-08-24 50 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 24 Missing Count 1 2006-08-24 62 0 2 2020-08-24 61 0 3 2010-08-24 59 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 24 Missing Count 1 2020-08-24 37 4 2 2016-08-24 34 0 3 2010-08-24 33 0 Time Series Summary for FARMINGDALE REPUBLIC 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 24 Missing Count 1 2020-08-24 50 0 2 2010-08-24 39 2 3 2018-08-24 32 0 - 2016-08-24 32 1 - 2015-08-24 32 0 - 2002-08-24 32 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 24 Missing Count 1 2020-08-24 32 0 2 2010-08-24 31 0 - 1988-08-24 31 0 Link to comment Share on other sites More sharing options...
wdrag Posted August 25, 2020 Share Posted August 25, 2020 So far, Sunday-Monday have only produced 2-3 tiny clusters of significant activity in our area (CT,NJ), though the northern fringe of our forum (NYS/CT) is now getting decent heavy showers/thunderstorms around 8A-9A. We'll see what comes up for us this afternoon, Thursday and now a D5 SPC OUTLOOK not added here, nor topic'd, since we already have a Laura remnant topic for Fri-Sat. For many all of this will be routine, but there will be a few hot spots of rocking weather the rest of this week. Should become a little more interesting. Link to comment Share on other sites More sharing options...
donsutherland1 Posted August 25, 2020 Share Posted August 25, 2020 Morning thoughts... At 9:12 am, a dying thunderstorm was located near Waterbury and headed east-southeastward. Following the departure of that thunderstorm, clouds should break in Hartford allowing the temperature to approach or reach 90°. If the temperature reaches 90°, that would be Hartford's record-breaking 39th such day this summer. The record is 38 days, which was set in 1983 and tied in 2020. Around the region, 9 am temperatures included: Hartford: 75° New York City: 78° Newark: 80° Philadelphia: 77° Poughkeepsie: 77° Much of the region will see high temperatures in the upper 80s and lower 90s. Parts of the area could see a strong or severe thunderstorm this afternoon or evening. Laura is now a hurricane with maximum sustained winds of 75 mph. There is a distinct possibility that it could be this season's first major landfalling hurricane. The remnants of Laura could exit off the Delmarva Peninsula this weekend. Link to comment Share on other sites More sharing options...
psv88 Posted August 25, 2020 Share Posted August 25, 2020 87/73 here Link to comment Share on other sites More sharing options...
psv88 Posted August 25, 2020 Share Posted August 25, 2020 Summer stats thus far: 18 90 degree days 28 70 degree lows Mean temp for July was 78.1, warmest in my 5 years here, beating out 2019 by 0.5. 2019 had 14 total 90 degree days (2 in october) and 26 70 degree lows 2018 had 13 total 90 degree days (1 in September) 2017 had 13 90 degree days 2015 had 6 90 degree days. In sum, this summer will go down as the warmest since i have lived here (only 5 years) Link to comment Share on other sites More sharing options...
doncat Posted August 25, 2020 Share Posted August 25, 2020 So far have had 38, 70°+ minimums... station record is 41 days set 4 times...last being 2010. Link to comment Share on other sites More sharing options...
IrishRob17 Posted August 25, 2020 Share Posted August 25, 2020 6 minutes ago, doncat said: So far have had 38, 70°+ minimums... station record is 41 days set 4 times...last being 2010. That's crazy, I have 2. Link to comment Share on other sites More sharing options...
SACRUS Posted August 25, 2020 Share Posted August 25, 2020 84/70. Sunny and warm. More 90s today likely ahead of the cold front / storms. Northerly flow Wed keeps the heat away for 12 - 18 hours before hot SW flow returns on Thu and brings in stronger 95(=) heat potential and maybe some record highs - well modeled in advance. With Laura nowlikely further south and west and remnants not impacting the EC till later Fri night/ Sat, Fri should see low to mid 90s as well. Outside chance if Laura stays well south that Saturday is sneaky warm. Cool down Sun (8/30) - Tue (9/1) before we warm things up Wed (9/2). The next shot at 90s looks like a 1 - 2 day window the middle/end of next week 9/3 - 9/5. Longer range ridging looks to setup along the EC towards mid month. Link to comment Share on other sites More sharing options...
bluewave Posted August 25, 2020 Share Posted August 25, 2020 For areas near the coast, 70° minimums are the benchmark. Further into the interior, it becomes 65°, 60°, and 55°. Numerous stations across the region are at the top for their corresponding benchmark records. Many stations have had 50 or more days reach those benchmarks. 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 24 Missing Count 1 2020-08-24 32 0 2 2010-08-24 31 0 - 1988-08-24 31 0 Time Series Summary for FARMINGDALE REPUBLIC 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 24 Missing Count 1 2020-08-24 50 0 2 2010-08-24 39 2 3 2018-08-24 32 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 24 Missing Count 1 2020-08-24 37 4 2 2016-08-24 34 0 3 2010-08-24 33 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 24 Missing Count 1 2006-08-24 62 0 2 2020-08-24 61 0 3 2010-08-24 59 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 24 Missing Count 1 2020-08-24 53 0 2 1908-08-24 52 0 3 1906-08-24 50 0 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 24 Missing Count 1 2020-08-24 51 0 2 2010-08-24 50 0 - 1973-08-24 50 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 24 Missing Count 1 2020-08-24 52 0 2 2019-08-24 47 1 - 2012-08-24 47 0 - 2010-08-24 47 2 Time Series Summary for SUSSEX AIRPORT, NJ Click column heading to sort ascending, click again to sort descending. Rank Ending Date Number of Days Min Temperature >= 60 Jun 1 to Aug 24 Missing Count 1 2020-08-24 58 2 2 2019-08-24 51 0 - 2018-08-24 51 0 Time Series Summary for Poughkeepsie Area, NY (ThreadEx) Click column heading to sort ascending, click again to sort descending. Rank Ending Date Number of Days Min Temperature >= 60 Jun 1 to Aug 24 Missing Count 1 2020-08-24 64 1 2 1973-08-24 62 0 3 2005-08-24 61 1 Time Series Summary for DANBURY MUNICIPAL AP, CT Click column heading to sort ascending, click again to sort descending. Rank Ending Date Number of Days Min Temperature >= 60 Jun 1 to Aug 24 Missing Count 1 2020-08-24 63 0 2 2019-08-24 52 0 3 2018-08-24 51 0 Time Series Summary for MONTGOMERY ORANGE COUNTY AP, 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 24 Missing Count 1 2018-08-24 53 0 2 2020-08-24 49 7 - 2005-08-24 49 3 Time Series Summary for MOUNT POCONO POCONO MOUNTAINS MUNICIPAL AP, PA Click column heading to sort ascending, click again to sort descending. Rank Ending Date Number of Days Min Temperature >= 55 Jun 1 to Aug 24 Missing Count 1 2020-08-24 67 0 2 2010-08-24 63 0 3 2005-08-24 61 1 Link to comment Share on other sites More sharing options...
IrishRob17 Posted August 25, 2020 Share Posted August 25, 2020 21 minutes ago, bluewave said: For areas near the coast, 70° minimums are the benchmark. Further into the interior, it becomes 65°, 60°, and 55°. Numerous stations across the region are at the top for their corresponding benchmark records. Widespread 50 or greater number days across the board from June 1st through August 24th. Absolutely. Its been a warm summer for sure but IMBY, nothing notable as far as record highs or heat waves, just a lot of well above average. In 2013 for example I had 14 70 degree lows, I average 4.9 lows of 70 and its only been 2 thus far with only 6 90 degree days. Link to comment Share on other sites More sharing options...
SnoSki14 Posted August 25, 2020 Share Posted August 25, 2020 53 minutes ago, SACRUS said: 84/70. Sunny and warm. More 90s today likely ahead of the cold front / storms. Northerly flow Wed keeps the heat away for 12 - 18 hours before hot SW flow returns on Thu and brings in stronger 95(=) heat potential and maybe some record highs - well modeled in advance. With Laura nowlikely further south and west and remnants not impacting the EC till later Fri night/ Sat, Fri should see low to mid 90s as well. Outside chance if Laura stays well south that Saturday is sneaky warm. Cool down Sun (8/30) - Tue (9/1) before we warm things up Wed (9/2). The next shot at 90s looks like a 1 - 2 day window the middle/end of next week 9/3 - 9/5. Longer range ridging looks to setup along the EC towards mid month. Ominous setup with northeast ridging for September. Opens the door for tropical systems. Link to comment Share on other sites More sharing options...
bluewave Posted August 25, 2020 Share Posted August 25, 2020 33 minutes ago, IrishRob17 said: Absolutely. Its been a warm summer for sure but IMBY, nothing notable as far as record highs or heat waves, just a lot of well above average. In 2013 for example I had 14 70 degree lows, I average 4.9 lows of 70 and its only been 2 thus far with only 6 90 degree days. Yeah, looks like you were one of the cooler spots along the general I- 84 corridor. Time Series Summary for WILKES-BARRE/SCRANTON INTERNATIONAL AIRPORT, PA Click column heading to sort ascending, click again to sort descending. Rank Ending Date Mean Avg Temperature Jun 1 to Aug 24 Missing Count 1 2005-08-24 74.7 0 2 2020-08-24 74.2 0 3 1949-08-24 73.8 0 4 1995-08-24 73.4 0 5 2016-08-24 73.1 0 6 1955-08-24 72.7 0 7 1966-08-24 72.6 0 8 2010-08-24 72.5 0 9 2019-08-24 72.3 0 10 1993-08-24 72.0 0 Time Series Summary for SUSSEX AIRPORT, NJ Click column heading to sort ascending, click again to sort descending. Rank Ending Date Mean Avg Temperature Jun 1 to Aug 24 Missing Count 1 2020-08-24 73.0 2 2 2005-08-24 72.5 0 3 2018-08-24 71.7 0 - 2016-08-24 71.7 1 - 2010-08-24 71.7 2 Time Series Summary for MONTGOMERY ORANGE COUNTY AP, NY Click column heading to sort ascending, click again to sort descending. Rank Ending Date Mean Avg Temperature Jun 1 to Aug 24 Missing Count 1 2005-08-24 73.3 3 2 2016-08-24 72.3 2 3 2018-08-24 72.1 0 - 2010-08-24 72.1 0 5 2002-08-24 72.0 1 - 1999-08-24 72.0 2 7 2020-08-24 71.7 7 Time Series Summary for Poughkeepsie Area, NY (ThreadEx) Click column heading to sort ascending, click again to sort descending. Rank Ending Date Mean Avg Temperature Jun 1 to Aug 24 Missing Count 1 2005-08-24 74.5 1 2 2020-08-24 74.3 1 3 2016-08-24 74.1 0 Link to comment Share on other sites More sharing options...
psv88 Posted August 25, 2020 Share Posted August 25, 2020 Don't think i hit 90 today, hit 89 earlier, but since then stuck at 87 Link to comment Share on other sites More sharing options...
donsutherland1 Posted August 25, 2020 Share Posted August 25, 2020 1 hour ago, bluewave said: For areas near the coast, 70° minimums are the benchmark. Further into the interior, it becomes 65°, 60°, and 55°. Numerous stations across the region are at the top for their corresponding benchmark records. Many stations have had 50 or more days reach those benchmarks. 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 24 Missing Count 1 2020-08-24 32 0 2 2010-08-24 31 0 - 1988-08-24 31 0 Time Series Summary for FARMINGDALE REPUBLIC 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 24 Missing Count 1 2020-08-24 50 0 2 2010-08-24 39 2 3 2018-08-24 32 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 24 Missing Count 1 2020-08-24 37 4 2 2016-08-24 34 0 3 2010-08-24 33 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 24 Missing Count 1 2006-08-24 62 0 2 2020-08-24 61 0 3 2010-08-24 59 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 24 Missing Count 1 2020-08-24 53 0 2 1908-08-24 52 0 3 1906-08-24 50 0 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 24 Missing Count 1 2020-08-24 51 0 2 2010-08-24 50 0 - 1973-08-24 50 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 24 Missing Count 1 2020-08-24 52 0 2 2019-08-24 47 1 - 2012-08-24 47 0 - 2010-08-24 47 2 Time Series Summary for SUSSEX AIRPORT, NJ Click column heading to sort ascending, click again to sort descending. Rank Ending Date Number of Days Min Temperature >= 60 Jun 1 to Aug 24 Missing Count 1 2020-08-24 58 2 2 2019-08-24 51 0 - 2018-08-24 51 0 Time Series Summary for Poughkeepsie Area, NY (ThreadEx) Click column heading to sort ascending, click again to sort descending. Rank Ending Date Number of Days Min Temperature >= 60 Jun 1 to Aug 24 Missing Count 1 2020-08-24 64 1 2 1973-08-24 62 0 3 2005-08-24 61 1 Time Series Summary for DANBURY MUNICIPAL AP, CT Click column heading to sort ascending, click again to sort descending. Rank Ending Date Number of Days Min Temperature >= 60 Jun 1 to Aug 24 Missing Count 1 2020-08-24 63 0 2 2019-08-24 52 0 3 2018-08-24 51 0 Time Series Summary for MONTGOMERY ORANGE COUNTY AP, 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 24 Missing Count 1 2018-08-24 53 0 2 2020-08-24 49 7 - 2005-08-24 49 3 Time Series Summary for MOUNT POCONO POCONO MOUNTAINS MUNICIPAL AP, PA Click column heading to sort ascending, click again to sort descending. Rank Ending Date Number of Days Min Temperature >= 55 Jun 1 to Aug 24 Missing Count 1 2020-08-24 67 0 2 2010-08-24 63 0 3 2005-08-24 61 1 The date unequivocally show that climate change is boosting such warm minimum temperatures. With regard to Islip, the 30-year moving averages for the periods ending in 2000 and later are: 2000: 18.9 days/year 2010: 20.4 days/year 2020: 23.7 days/year (using data through 8/14) Islip has seen that figure increase by nearly 2.5 days per decade since 2000. The coefficient of determination is > 0.95. Whether one is dealing with urban areas having mature footprints, suburban or exurban areas, one finds the same trend in increasing minimum temperatures (and temperatures overall). Link to comment Share on other sites More sharing options...
binbisso Posted August 25, 2020 Share Posted August 25, 2020 5 minutes ago, donsutherland1 said: The date unequivocally show that climate change is boosting such warm minimum temperatures. With regard to Islip, the 30-year moving averages for the periods ending in 2000 and later are: 2000: 18.9 days/year 2010: 20.4 days/year 2020: 23.7 days/year (using data through 8/14) Islip has seen that figure increase by nearly 2.5 days per decade since 2000. The coefficient of determination is > 0.95. Whether one is dealing with urban areas having mature footprints, suburban or exurban areas, one finds the same trend in increasing minimum temperatures (and temperatures overall). Don what kind of increase in the new daily normals are we looking at heading into January 2021 when we lose the much cooler 80s and add in the 2010 s which were much warmer Link to comment Share on other sites More sharing options...
donsutherland1 Posted August 25, 2020 Share Posted August 25, 2020 21 minutes ago, binbisso said: Don what kind of increase in the new daily normals are we looking at heading into January 2021 when we lose the much cooler 80s and add in the 2010 s which were much warmer The summer average for HPN will probably increase from around 70.7 to around 71.2 or 71.3. Summer averages have been increasing about 0.5 degrees per decade. Link to comment Share on other sites More sharing options...
bluewave Posted August 25, 2020 Share Posted August 25, 2020 51 minutes ago, donsutherland1 said: The date unequivocally show that climate change is boosting such warm minimum temperatures. With regard to Islip, the 30-year moving averages for the periods ending in 2000 and later are: 2000: 18.9 days/year 2010: 20.4 days/year 2020: 23.7 days/year (using data through 8/14) Islip has seen that figure increase by nearly 2.5 days per decade since 2000. The coefficient of determination is > 0.95. Whether one is dealing with urban areas having mature footprints, suburban or exurban areas, one finds the same trend in increasing minimum temperatures (and temperatures overall). Yeah, it fits the pattern really well. https://www.climate.gov/news-features/blogs/beyond-data/climate-change-rule-thumb-cold-things-warming-faster-warm-things Climate change rule of thumb: cold "things" warming faster than warm things Colder places are warming faster than warmer places Colder seasons are warming faster than warmer seasons Colder times of day are warming more than warmer times of day Link to comment Share on other sites More sharing options...
donsutherland1 Posted August 25, 2020 Share Posted August 25, 2020 Hartford has recorded its record 39th 90-degree day. Link to comment Share on other sites More sharing options...
CIK_62 Posted August 25, 2020 Share Posted August 25, 2020 Read Remotely: On beach in Ci.. 87* with a Heat Index of 91* àt 2pm. 89* and Heat Index is 95* at 3pm,-still some sandstorms. More clouds. West wind and some sandstorms. Reminds of Oct. 02 last year but not 93* Link to comment Share on other sites More sharing options...
Rtd208 Posted August 25, 2020 Author Share Posted August 25, 2020 Current temp 90/DP 71/RH 53% Link to comment Share on other sites More sharing options...
psv88 Posted August 25, 2020 Share Posted August 25, 2020 Take it back, hit 90 here. #19 on the year. Link to comment Share on other sites More sharing options...
psv88 Posted August 25, 2020 Share Posted August 25, 2020 91 here and ISP Link to comment Share on other sites More sharing options...
doncat Posted August 25, 2020 Share Posted August 25, 2020 Interesting summer where areas to our north like Hartford have set 90 degree days records...My station is no where close to its record of 44 days set in 2010, with 28 days after today. Big difference in summer rain fall between said station and mine has something to do with it. Link to comment Share on other sites More sharing options...
Intensewind002 Posted August 25, 2020 Share Posted August 25, 2020 Currently at 91 in Lindenhurst, thankfully dewpoint is only at 66 so it doesn't feel too bad outside Link to comment Share on other sites More sharing options...
Cfa Posted August 25, 2020 Share Posted August 25, 2020 93 here, warmest temp so far this August. Link to comment Share on other sites More sharing options...
psv88 Posted August 25, 2020 Share Posted August 25, 2020 4 minutes ago, Cfa said: 93 here, warmest temp so far this August. Yea, one of those rare days where we keep warming until 3:30 or so Link to comment Share on other sites More sharing options...
Cfa Posted August 25, 2020 Share Posted August 25, 2020 4 minutes ago, psv88 said: Yea, one of those rare days where we keep warming until 3:30 or so Yeah, I was expecting temps to level off at around 90 but it kept on going. Link to comment Share on other sites More sharing options...
CIK62 Posted August 25, 2020 Share Posted August 25, 2020 2 hours ago, CIK_62 said: Read Remotely: On beach in CI. 87* with a Heat Index of 91* at 2pm. 89* and Heat Index is 95* at 3pm,-still some sandstorms. More clouds. Back home by 4:30pm 92* Heat Index is 98*-but clouds/wind made it tolerable. West wind and some sandstorms. Reminds me of Oct. 02 last year but not 93* Link to comment Share on other sites More sharing options...
donsutherland1 Posted August 26, 2020 Share Posted August 26, 2020 Temperatures topped out in the upper 80s and lower 90s across the region. Parts of the area also saw thundershowers during the late afternoon and evening. Hartford reached 90° this afternoon. That was the record 39th 90° or above day there. The old record was 38 days, which was set in 1983. Tomorrow will be noticeably cooler before temperatures rebound on Thursday and Friday. However, the month could end on a cool note before temperatures again return to above normal levels during the first week of September. Overall, the September 1-15 period could run several degrees above normal in the Middle Atlantic region. The remnants of Laura could exit off the Delmarva Peninsula this weekend. The system has the potential to bring an area of 1"-3" rain with locally higher amounts along or near its path and another area with pockets of heavy rain along a frontal boundary to its north. The New York City area and adjacent suburbs could pick up 0.50" or more rain if some of the guidance verifies. There remains some uncertainty about Laura's track and the location of the front. The current predominantly warmer than normal pattern will likely persist through much of September, providing a warm start to fall throughout the region. Occasional short-lived cool shots remain possible. Parts of the West continued to experience near record to record warmth. Select high temperatures included: Death Valley, CA: 119° Denver: 97° Flagstaff: 85° Kingman, AZ: 106° (tied record set in 1919 and tied in 1985) Lake Havasu City, AZ: 113° Las Vegas: 110° Needles, CA: 117° Palm Springs, CA: 117° (tied record set in 1962) Phoenix: 112° Pueblo, CO: 101° Tucson, AZ: 107° (old record: 106°, 1901, 1985, 2001 and 2002) Yuma, AZ: 115° Phoenix has an implied near 100% probability of having its warmest summer on record. Phoenix will likely finish with a summer mean temperature of 96.7° - 96.9°. The existing record is 95.1°, which was set in summer 2013 and tied in summer 2015. July 2020 was Phoenix's warmest month on record with a mean temperature of 98.9°. August 2020 could approach or exceed that figure. There is currently an implied 70% probability that August will exceed July's monthly record. The ENSO Region 1+2 anomaly was -1.1°C and the Region 3.4 anomaly was -0.8°C for the week centered around August 19. For the past six weeks, the ENSO Region 1+2 anomaly has averaged -1.17°C and the ENSO Region 3.4 anomaly has averaged -0.55°C. Neutral-cool conditions will likely evolve into La Niña conditions during the fall. The SOI was -3.22. Today, the preliminary Arctic Oscillation (AO) figure was +0.769. On August 24, daily MJO data was unavailable. Last year, the MJO went through a very strong passage through Phase 1 during the closing days of May. About four weeks later, a warmer than normal pattern locked in and predominated through early autumn. This year, the MJO was in Phase 1 for 3 consecutive days with an amplitude of 1.500 or above during the June 1-3 period. Last year, the SOI fell to -42.04 on June 22 when the MJO was in Phase 6. This year, the SOI plunged below -46.68 on June 5, its lowest level in more than three years. The dramatic plunge in the SOI could be the proverbial spark that kicks off a sequence of events leading to the development of a sustained warmer than normal period. The cases that saw both the MJO and SOI thresholds satisfied generally saw 10-20 days where the temperature reached or exceeded 90° in New York City during the July 1-August 31 period. Since 1990, there have been 11 La Niña events, 6 of which followed an El Niño winter. 10/11 (91%) case saw warmer than normal September. All 6 following an El Niño winter were warmer than normal. September mean temperatures for New York City for those cases were: 11 cases: 69.9°; Subset of 6 cases: 70.8°; Entire 1990-2019 period: 69.0°. The September mean temperature for all La Niña and neutral-cool cases following an El Niño winter (1950-2019: n=13) was 69.9°. Overall, the evolution of ENSO, along with the observed ongoing monthly warming (1.6°/decade in NYC and 1.5°/decade in the Northeast Region during September 1990-2019), favors a warmer than normal September. Since 1950, there have been five cases where a La Niña developed during June-July-August or afterward following an El Niño winter. 4/5 (80%) of those cases saw a predominant EPO+/AO+ winter pattern. The most recent such case was 2016-17. 9/10 (90%) of the La Niña winters that followed an El Niño winter featured a predominantly positive EPO. Based on sensitivity analysis applied to the latest guidance, there is an implied 94% probability that New York City will have a warmer than normal August. August will likely finish with a mean temperature near 76.9°. Finally, on August 24, Arctic sea ice extent was 4.237 million square kilometers (JAXA). There is an implied 92% probability that Arctic sea ice extent will reach a minimum figure below 4.000 million square kilometers for the second consecutive year and third time on record. The highest 25% bound is 3.831 million square kilometers. The lowest 25% bound is 3.508 million square kilometers. Link to comment Share on other sites More sharing options...
SACRUS Posted August 26, 2020 Share Posted August 26, 2020 8/25 LGAL 93 EWR: 92 JFK: 92 ACY: 91 ISP: 91 BLM: 91 PHL: 91 TEB: 90 New Brnswck: 90 TTN: 89 NYC: 89 Link to comment Share on other sites More sharing options...
Recommended Posts
Archived
This topic is now archived and is closed to further replies.