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Severe Thunderstorm Warning
NYC059-103-270030-
/O.NEW.KOKX.SV.W.0012.210526T2344Z-210527T0030Z/

BULLETIN - IMMEDIATE BROADCAST REQUESTED
Severe Thunderstorm Warning
National Weather Service New York NY
744 PM EDT Wed May 26 2021

The National Weather Service in Upton NY has issued a

* Severe Thunderstorm Warning for...
  Western Suffolk County in southeastern New York...
  Southeastern Nassau County in southeastern New York...

* Until 830 PM EDT.

* At 744 PM EDT, a severe thunderstorm was located over Farmingdale,
  moving east at 45 mph.

  HAZARD...60 mph wind gusts and penny size hail.

  SOURCE...Radar indicated.

  IMPACT...Expect damage to trees and power lines.

* This severe thunderstorm will be near...
  Deer Park and Babylon around 750 PM EDT.
  Commack and Bay Shore around 755 PM EDT.
  Islip and Brentwood around 800 PM EDT.
  Ronkonkoma around 805 PM EDT.
  Centereach and Holbrook around 810 PM EDT.
  Medford and Patchogue around 815 PM EDT.
  Middle Island and Yaphank around 820 PM EDT.
  Shirley and Mastic around 825 PM EDT.

This includes the following New York State COVID tent site
SUNY Stony Brook.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

For your protection move to an interior room on the lowest floor of a
building.

&&

LAT...LON 4082 7357 4098 7288 4073 7278 4066 7303
      4060 7352
TIME...MOT...LOC 2344Z 261DEG 39KT 4073 7342
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The 18z GFS forecasts three consecutive days on which the high temperature will stay below 60° in Central Park in coming days. Its forecast:

May 29: 55°

May 30: 57°

May 31: 55°

Since 1869, there has been only one such 3-day stretch beginning May 29 or later: June 3-5, 1945. The high temperatures were: June 3: 53°; June 4: 52°; June 5: 55°.

The most recent late May case occurred during May 22-24, 2003 when the high temperatures were 56° on all three dates. 

All four prior cases that saw such stretches beginning May 21 or later had rainfall on at least two of the three days. 

In sum, the GFS is suggesting what would be a rare event. It is still too soon to be sure that it will verify given its rarity.

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9 minutes ago, donsutherland1 said:

The 18z GFS forecasts three consecutive days on which the high temperature will stay below 60° in Central Park in coming days. Its forecast:

May 29: 55°

May 30: 57°

May 31: 55°

Since 1869, there has been only one such 3-day stretch beginning May 29 or later: June 3-5, 1945. The high temperatures were: June 3: 53°; June 4: 52°; June 5: 55°.

The most recent late May case occurred during May 22-24, 2003 when the high temperatures were 56° on all three dates. 

All four prior cases that saw such stretches beginning May 21 or later had rainfall on at least two of the three days. 

In sum, the GFS is suggesting what would be a rare event. It is still too soon to be sure that it will verify given its rarity.

the first week of June 1945 is the coldest on record...starting June 14th 1945 there was a five day heat wave...June 1945 ended up with a high of 97 on the 30th...

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