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May 2023


Brian5671
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27 minutes ago, Stormlover74 said:

This has been a remarkably average month of May temp wise. A little bit of heat,  a few cool days but mostly sunny dry seasonable weather. Usually we end up with quite a few raw damp days but only a couple this year 

While we need the rain, this weather has been incredible.  Not sure how anyone can't like it.  Beautiful dry days that aren't humid.

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If May ends with 1.28" rain it will be 13th driest of 155 (1869-2023) at NYC, the top 20 dry Mays are:

Rank ___ Year ____ Prec 

_01 ____ 1887 ____ 0.34

_02 ____ 1903 ____ 0.50

_03 ____ 1964 ____ 0.57

_04 ____ 1880 ____ 0.62

_05 ____ 1905 ____ 0.72

_06 ____ 1939 ____ 0.89

_07 ____ 1877 ____ 0.95

_08 ____ 1935 ____ 1.05

_09 ____ 1899 ____ 1.09

_10 ____ 1944 ____ 1.18

_11 ____ 1911 _____ 1.25

_12 ____ 1962 ____ 1.26

_13? ___ 2023 ____ 1.28

_t14 _ 1875, 1959 _ 1.33

_16 ____ 1902 ____ 1.35

_17 ____ 1987 ____ 1.45

_18 ____ 1909 ____ 1.47

_19 ____ 2005 ____ 1.48

_20 ____ 1910 ____ 1.49

(21) ____ 1993 ____ 1.56

Median value (rank 78) is 3.56"

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Fair and warm conditions prevailed throughout much of the Middle Atlantic region. New York City finished with a monthly mean temperature of 62.7°, which was 0.5° below normal.

Across northern Maine, New Brunswick, and Quebec, record-breaking heat was the story. Record highs included: Caribou: 91°; Miramichi, NB: 92°; and, Sept-Îles, QC: 87° (May monthly record).

June will start with above normal temperatures, but a trough will likely develop leading to a return of cooler conditions shortly afterward. Some of the models show a fairly impressive cold shot for early June.

The latest ECMWF weeklies suggest that sustained warmer than normal conditions could develop during or after the second week of June.

The ENSO Region 1+2 anomaly was +2.0°C and the Region 3.4 anomaly was +0.4°C for the week centered around May 24. For the past six weeks, the ENSO Region 1+2 anomaly has averaged +2.28°C and the ENSO Region 3.4 anomaly has averaged +0.42°C. El Niño conditions will very likely develop during the summer.

The SOI was -29.32 today.

The preliminary Arctic Oscillation (AO) was +0.664 today.

On May 29 the MJO was in Phase 8 at an amplitude of 1.358 (RMM). The May 28-adjusted amplitude was 1.647 (RMM).

 

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Wow, Harrisburg, Reading.  Those low rainfall totals can't be good at all for the farming industry out that way.

These temps along with the low humidity have been amazing.  Too amazing.  The best part is the diurnal swings.  House gets a little hot during the afternoon, then open all windows and have the house chilly by morning.  Rinse wash and repeat.   Walpack NJ today low of 35 and high of 84.  Up the road in Sandyston, NJ was 39/84.  I had 42/81 on the dial here.

 

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9 hours ago, MANDA said:

The below normal months are barely below and the above normal months are well above.

 

Also, the May normals used are from the more recent 30 years, so elevated from the earlier averages.

May seemed warm and dry here in NYC, certainly more pleasant weather than in most recent Mays.

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