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June 2020 General Discussions & Observations Thread


Rtd208
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1 hour ago, bluewave said:

LGA has been our only major station to reach 100 degrees in recent years along with several others in New England. But the rest of our major sites haven’t made it to 100 since the 2010-2013 period. Probably has something to do with the record NEPAC warming that began in 2013-2014. Most of our big warm ups in recent years have come with record high dew points and more onshore flow. Seems like the strong -PDO in 2010-2013 lead to record drought in the Southern Plains and more westerly flow here.

Most recent 100 degree days at stations other and LGA

EWR...2013

NYC....2012

JFK.....2013

ISP.......2011

BDR....2011

HPN....2010

FRG.....2011
 

Time Series Summary for LAGUARDIA AIRPORT, NY - Jan through Dec
Click column heading to sort ascending, click again to sort descending.
Year
Highest Max Temperature 
Missing Count
2019 100 0
2018 98 0
2017 101 0
2016 99 0
2015 95 0
2014 93 0
2013 100 0
2012 101 0
2011 104 0
2010 103 0

Do we have a -PDO right now? 

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1 hour ago, donsutherland1 said:

With the changes that starting occurring over the Pacific just after the beginning of this month, I don’t think we will escape heat and humidity. Those changes have started a hemispheric pattern change that is evolving. One will probably see a transition toward sustained warmer than normal conditions get underway during the third and fourth weeks this month in this region. Should the emerging drought deepen, there will be the potential for some severe bouts of heat in July and perhaps August.

sounds like aummer time has arrived...happens every year...

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26 minutes ago, dmillz25 said:

Do we have a -PDO right now? 

It’s currently a bit more neutral than recent summers. But there is still plenty of NEPAC SST warmth. So nothing like the impressive -PDO cold ring we had in 2010-2013. 
 

6-12-2020

12EAF46B-2FBE-4FB3-8BA1-3F4FD27721CD.gif.93b27aca357cc95ca8a500b5116221ac.gif

6-12....2014 to 2019

 

FEF62291-6EA0-41B2-8190-E9937BC1DB03.gif.ac983c6e653710d1bf78dca6572e78be.gif

 

6-12....2010 to 2013

 

D6B36C19-7459-4AF0-BE6F-60D2D7A33F65.gif.c5f3ac58f3bb93f748e33ddc38da699c.gif

 

 

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The day started with unseasonably cool temperatures. Low temperatures included:

Albany: 43°
Allentown: 48°
Binghamton: 39° (old record: 41°, 1978)
Boston: 53°
Bridgeport: 52°
Islip: 53°
New York City: 54°
Newark: 53°
Philadelphia: 56°
Poughkeepsie: 43° (tied record set in 1978 and tied in 1979)
Scranton: 44°
White Plains: 46° (tied record set in 1979)

Temperatures will remain below normal through the middle of this week with delightful sun-filled days, low humidity, and a continued absence of summer-like heat.

However, the probability of a major pattern change toward sustained warmer than normal conditions beginning during the closing 10 days of June has continued to increase. Afterward, the warm pattern could lock in for July and August, paving the way for a warmer than normal summer.

The ENSO Region 1+2 anomaly was -0.3°C and the Region 3.4 anomaly was -0.4°C for the week centered around June 3. For the past six weeks, the ENSO Region 1+2 anomaly has averaged -0.05°C and the ENSO Region 3.4 anomaly has averaged -0.17°C. Neutral-cool conditions will likely prevail through mid-summer. The probability of the development of a La Niña event during late summer or early autumn has increased in recent weeks.

The SOI was -8.44 today.

Today, the preliminary Arctic Oscillation (AO) figure was +0.010.

On June 13, the MJO was in Phase 2 at an amplitude of 0.997 (RMM). The June 12-adjusted amplitude was 0.889.

April and May 2020 featured unseasonably cool readings in the region. But now the proverbial clock may be starting to run out on the cool pattern.

Last year, the MJO went through a very strong passage through Phase 1 during the closing days of May. About four weeks later, the pattern was locking in with sustained above normal temperatures.

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. Since 1981, there were four such cases that saw the MJO meet or exceed those thresholds during the June 1-10 period: 2002, 2006, 2007, and 2015. While the four cases were evenly split between cooler and warmer than normal during the second half of June, 3 of those 4 cases saw a warmer to much warmer than normal July. This could be an early indication that a summer that will start with near normal temperatures overall (June) could turn warmer than normal afterward.

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. Taking into consideration the MJO, that transition could begin some time during the closing 10 days of June. Further, 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.

Just as had been the case last year, July and August could feature warm anomalies in the East. July-August 2019 saw 13 days on which the temperature reached or exceeded 90° in New York City.

Based on sensitivity analysis applied to the latest guidance, there is an implied 68% probability that New York City will have a warmer than normal June. June will likely finish with a mean temperature near 73.0°.

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The next 8 days are averaging 72.5degs., or just Normal.

Month to date is  +2.2[71.4].        Should be +1.4[71.8] by the 23rd.

62* at 6am, clear.           68* by 10am, cirrus          69* about Noon.       65* at 2pm (but more sun now)      69* by 5pm.

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While its  been a warmer than average first two weeks of June, the highest departures have been over the Central US. The greatest warmth looks to remain to our west through much of this week. But a piece should come east by next weekend. Main question will be how much onshore flow we will have at the time of the warm up. All models indicating at least some SE flow at that time. 
 

EWR...+2.6

NYC....+2.2

LGA....+3.6

JFK....+1.1

BDR...+1.9

ISP.....+2.2

C34F5C2B-9F11-4B35-8716-74F84259A6F0.thumb.png.301084fd25231dcfd3f96aad65bd9930.png


2C7CB398-9585-4036-83F9-28E704DD08B4.thumb.png.ee338ef5121cf9c5e6ed14786de70aec.png

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Up to 69 off a low of 50.  High clouds moving in from the south.

Overnight guidance continues overall onshore barrage through the week with Thu likely being the overcast day.  Warm things starting on Friday but may take till Sat PM before flow fully goes SW.  By Sunday we should see the heat (possibly strong heat) come in and continue into early the following week.  Overall warm and possibly stormy from 6/25 on with more expansive   very strong heat building into the  PLains / GL perhaps cycling back into the East by months end and into the start of July.  Ridge looks cnetered into the Plains so would imagine a stormier warm pattern..

 

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23 hours ago, SACRUS said:

Cool down;

6/13:
NYC: 75/59 (-4)
EWR: 77/58 (-4)
LGA:  77/60 (-3)
JFK:  73/59 (-3)
TTN: 74/57 (-4)

 

6/14

NYC: 75/52(-6)
EWR: 75/53 (-8)
LGA:  75/55 (-7)
JFK: 71/54 (-7)
TTN: 75/52 (-6)

 

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53 minutes ago, forkyfork said:

WAR signal showing up on the ensembles

ecmwf-ens_z500a_atl_11.png

gfs-ens_z500a_atl_fh180-294.gif

You wonder if sometime in the next 2 weeks the Plains ridge and WAR could merge for some impressive ridging and maybe record heat somewhere.  There is a tendency for ridging to go north and easterly flow, at some point that will bring the WAR west too.

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29 minutes ago, Rtd208 said:

Not shocked to see this. The mid-longer range heat on the models have been more fantasy then reality. 

Yeah, just a continuation of the onshore flow pattern that dominated the second half of May. Looks Ike the models have been rushing warm ups when there is a cooler pool off the East Coast. Seems like the reverse of the models continuously underestimating the WAR in recent years when that record warm pool was out there. 

4AC32DA0-FF05-4949-BB4C-41D2E2584C17.gif.9a1cad3fb501eb1d4fc90a92a623d0e7.gif
1B1F249C-E30C-4CD6-8081-3B0E02C2CA08.png.246e5f215f1b31700fe9d9c74217a55f.png


 

 

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14 minutes ago, bluewave said:

Yeah, just a continuation of the onshore flow pattern that dominated the second half of May. Looks Ike the models have been rushing warm ups when there is a cooler pool off the East Coast. Seems like the reverse of the models continuously underestimating the WAR in recent years when that record warm pool was out there. 

4AC32DA0-FF05-4949-BB4C-41D2E2584C17.gif.9a1cad3fb501eb1d4fc90a92a623d0e7.gif
1B1F249C-E30C-4CD6-8081-3B0E02C2CA08.png.246e5f215f1b31700fe9d9c74217a55f.png


 

 

No different then mid-long range fantasy snowstorms in the winter.

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Temperatures will remain below normal through midweek with delightful sun-filled days, low humidity, and a continued absence of summer-like heat. Late this week or this weekend, a major pattern change toward sustained warmer than normal conditions will likely begin to evolve. Initially, extreme heat is unlikely. The warm pattern could then lock in for July and August, paving the way for a warmer than normal summer.

The ENSO Region 1+2 anomaly was -0.8°C and the Region 3.4 anomaly was -0.6°C for the week centered around June 10. For the past six weeks, the ENSO Region 1+2 anomaly has averaged -0.20°C and the ENSO Region 3.4 anomaly has averaged -0.33°C. Neutral-cool conditions will likely prevail through mid-summer. The probability of the development of a La Niña event during late summer or early autumn has increased in recent weeks.

The SOI was -22.42 today.

Today, the preliminary Arctic Oscillation (AO) figure was +0.010.

On June 14, the MJO was in Phase 2 at an amplitude of 1.221 (RMM). The June 13-adjusted amplitude was 0.991.

April and May 2020 featured unseasonably cool readings in the region. But now the proverbial clock may be starting to run out on the cool pattern.

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. Since 1981, there were four such cases that saw the MJO meet or exceed those thresholds during the June 1-10 period: 2002, 2006, 2007, and 2015. While the four cases were evenly split between cooler and warmer than normal during the second half of June, 3 of those 4 cases saw a warmer to much warmer than normal July. This could be an early indication that a summer that will start with near normal temperatures overall (June) could turn warmer than normal afterward.

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. Taking into consideration the MJO, that transition could begin some time during the closing 10 days of June. Further, 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.

Just as had been the case last year, July and August could feature warm anomalies in the East. July-August 2019 saw 13 days on which the temperature reached or exceeded 90° in New York City.

Based on sensitivity analysis applied to the latest guidance, there is an implied 68% probability that New York City will have a warmer than normal June. June will likely finish with a mean temperature near 73.0°.

 

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The next 8 days are averaging 73degs., or 0.5degs.  AN.

Month to date is  +1.8[71.1].          Should be +1.4[71.8] by the 24th.

62* here at 6am., clear.      63* at 6:30am.        68* by 9am.       70* by 10:00am.     Down to 67* by Noon.       69* by 2pm.

GFS ENS has the second half of June at +2.0[75.0].         So we end up at 73 and about +2 for the month.

 

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Down to 53 last night another good sleeping weather kinda evening.  Up to 68.  Clouds and showers about 80 - 100 miles south with strong  NE flow keeping it dry and sunny.

 

Overnight runs says the onshore flow doesnt want to go as they had been morphing to since monday  ala - ate May.  Overall onshore flow becoming more southerly this weekend as the cut off heads to PA rather than offshore.  More steamy (perhaps stormy) than hot Fri -  Sun .  It does look to get closer to 90 by Mon  - Wed with 850s expected to rise to 16-18.on a more sw flow.  Stormier pattern looks to be taking shape by 6/25 as another strong ridge builds into the plains and moves into the GL,  have to watch more ULL cutoff city 6/25  - 6/30 but month should end on a steamier note.  Perhaps the WAR will build in by early July pushing the weakness in the northeast into Canda.

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Cool down;

6/13:
NYC: 75/59 (-4)
EWR: 77/58 (-4)
LGA:  77/60 (-3)
JFK:  73/59 (-3)
TTN: 74/57 (-4)

6/14

NYC: 75/52(-6)
EWR: 75/53 (-8)
LGA:  75/55 (-7)
JFK: 71/54 (-7)
TTN: 75/52 (-6)

 

6/15:

NYC: 75/59 (-5)
EWR: 75/56 (-7)
LGA: 77/62 (-2)
JFK: 73/56 (-5)
TTN: 75/52 (-7)

 

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6 hours ago, uofmiami said:

It’s the pattern. Called this Friday morning:

 

 

5 hours ago, Allsnow said:

They took are snow, now they can have are heat! 

We have seen the subtropical high extending further to the north in recent years. Once the ridge axis gets north of 40N, our area gets southeast flow. July 2018 featured very humid onshore flow here. BTV went +5.4 with their first 80 degree minimum. LGA only  had a 79 minimum and a +2.4 . The onshore flow in late May kept the all-time record highs to our north. So the next several days will feature the warmest temperatures staying north again with onshore flow here.

 

July 2018

6F4D3736-E26E-47F9-8E9B-2378C4929079.png.ef297ce86ecfcecfc07f4ec461ec160b.png

5-28-20

BCE40154-9294-4732-A320-871E70D02364.gif.b2788acd567e2ed944ff0407fe8d4126.gif

 

More of the same next several days

3DADACB6-3DC7-4C30-AE98-5560F2E70645.thumb.png.30f23dad66bc1c76de2cab1e7ed3aab1.png

 


 

 

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