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The day started off with near record low temperatures and even some record lows in parts of the region. Lows included:

Allentown: 41°
Atlantic City: 43°
Bridgeport: 45°
Danbury: 37°
Islip: 43°
New Haven: 43°
New York City-Central Park: 50°
New York City-JFK Airport: 48° (tied record set in 1966 and tied in 1977 and 2023)
New York City-LaGuardia Airport: 54°
Newark: 46°
Philadelphia: 52°
Poughkeepsie: 37°
Westhampton: 31° (old record: 34°, 2008)
White Plains: 42°

Overall, New York City finished May with a monthly mean temperature of 63.2°, which is the normal 1991-2020 value. That was 0.8° warmer than the earlier 1981-2010 baseline.

The first week of June will likely see temperatures average somewhat below normal to near normal. However much warmer weather could arrive on Friday and then continue through the first weekend of June.

The ENSO Region 1+2 anomaly was +2.1°C and the Region 3.4 anomaly was +1.0°C for the week centered around May 20. For the past six weeks, the ENSO Region 1+2 anomaly has averaged +1.72°C and the ENSO Region 3.4 anomaly has averaged +0.83°C. The ongoing El Niño will continue to strengthen through the summer.

The SOI was -14.84 today. 

The preliminary Arctic Oscillation (AO) was +0.251 today. 

 

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The latest model data to me is suggesting the Omega block sticks around a while longer but at times its position shifts a bit east allowing pieces of the hot high pressure ridge to move east and into and out of the NYC Metro region. So we go back and forth with 2 days of warmth/heat and then 2-3 days of cool weather.  I suspect over time later in June or early July that the warmer/hotter weather may tend to own a little more of the time but I think the unusually amped flow will continue to allow cold fronts to move across the northeast. 

WX/PT

  

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