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June 2020 General Discussions & Observations Thread


Rtd208
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Palm Springs kind of morning 67/48 off a low of 58.

Just a tremendous bright and cooler June weekend with mostly sunny skies and nice breeze / good sleeping weather.  ULL will  take a midnight train to Georgia ans setup down in the Southeast the first half of the week.  Persistent onshore flow but mainly dry conditions will make it more May-like than mid June-like through Wed.  Warming Thu and Fri and we'll see with a week of dryness and a warmer flow if we can see the seasons first heatwave for the warmer spots 6/20 - 6/22 ahead of next front. Beyond there looks warm for most of the nation on/around 6/25 - but thats almost 2 weeks from now.  Will need to see if any variation with the ULL can muck up Wed or Thu, doesnt appear that way now.  Onward and upward.

 

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The 12Z GFS is back to its old antics and it ain't wearing no stinkin' masks during the ten day period of June 20-29.        Average high of 91 for the period it proclaims,  or 9 to 10 degrees AN.

As usual, its ENS is just mellow-yellow.      This theater  keeps running the same movie at later and later times, with one splice in the film yesterday.    

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Tonight will be unseasonably cool. Low temperatures tomorrow morning will range from the lower and middle 50s in New York City and Newark and the 40s in some of their suburbs. Temperatures will likely remain below normal through the middle of next 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 in the third or fourth week of June has increased in recent days. 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 +8.65 today.

Today, the preliminary Arctic Oscillation (AO) figure was -0.393.

On June 12, the MJO was in Phase 2 at an amplitude of 0.888 (RMM). The June 11-adjusted amplitude was 1.126.

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. Just as had been the case last year, July and August could feature warm anomalies in the East.

Based on sensitivity analysis applied to the latest guidance, there is an implied 66% 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 71degs., or 2degs. BN.

Month to date is +3.0[72.0].         Should be about  +1.1[71.6] by the 22nd.

56* here at 6am, clear.        64* by 11am.        66* by 2pm.

I think it is virtually certain we will be celebrating the start of Summer with NYC's first 90-Degree Day on the 21st. or 22nd.

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The low so far of 53 at Newark is  4 degrees off the record low this morning. First time since 1985 that Newark was so cool this late into June. White Plains tied their record low of 46 degrees.

Almanac for NEWARK LIBERTY INTL AP, NJ
June 14, 2020
Daily Data Observed Normal Record Highest Record Lowest
Max Temperature M 81 99 in 1988 61 in 2002
Min Temperature M 63 79 in 2005 49 in 1978

 

14 Jun 7:51 am 58 41 53 N 12    10.00   FEW060,FEW140,SCT220 30.35 1028.3 30.37         58 53  

 

 

Almanac for WESTCHESTER CO AP, NY
June 14, 2020
Daily Data Observed Normal Record Highest Record Lowest
Max Temperature M 77 96 in 1988 58 in 2002
Min Temperature M 59 72 in 2005 46 in 1979
Avg Temperature M 67.7 82.0 in 1988 55.5 in 2002

 

14 Jun 7:56 am 56 40 55 N 5    10.00   CLR 29.96 1028.1 30.36         56 46

 

 

 

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Up to 65/42 off a low of 51.  Just  gorgeous weekend.

Overnight runs - no major changes this week / next 6 days with persistent onshore flow but center of the ULL over the southeast and conditions generally dry and cooler than normal / very California like, could see a day with a morning marine layer burn off (June gloom).  Beyond there we warm Friday with a blast of the heat thats been over the Plains comes and overspreads the east 6/20 - 6/22 with first heatwave potential for some. Looking warmer overall nationwide to close out June and start the push into July.  Heat source settng up in the Plaing - GL could setup warm but stormy last week of June, not seeing more onshore rather  Seeing signs expansive ridging .

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11 minutes ago, uncle W said:

1995 tied a record low on June 28th...54 degrees...

1988 set a record low on July 1st...53 degrees...tied for the second coldest July day on record...

we all know what happened both years in July and August...hopefully 2020 stays like this week...

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.

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1 hour ago, dmillz25 said:

Could this be the year that we finally hit 100?

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
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