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May 2015 Discussion & Observations


dmillz25

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A look at May's the last 2 decades NYC

 

 

Year.  Dep  (highest temp)

 

 

2014:   +1.6  (2x 86)

2013: +0.4 (2x 90)

2012:   +2.7 (89)

2011: +2.1 (89)

2010: +2.9 (92)

2009: +0.1 (86)

2008:  -2.3 (83)

2007: +2.8 (91)

2006:  +0.7 (88)

2005:  -3.5 (79)

2004:  +2.8 (87)

2003:  -3.7 (79)

2002: -1.7 (85)

2001: +1.2 (92)

2000: +1.1 (93)

1999 : +0.4 (89)

1998: +1.8 (87)

1997: -3.1 (83)

1996:  -1.3 (96)

1995: -0.3 (87)

1994:  -0.3 (91)

1993: +3.2 (92)

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What's the warmest May on record? The departures look to be ridiculously high through mid month at least. We might be at a +8 or +9 by the 14th.

The greatest deviation above normal for May is about +6.5 degs. for an entire month.  Temps will dip at mid-month for about 3 days then ridging again, possibly ending with a trough on the 22nd.    I think the deviation by the 14th will be closer to  just 7 degs.   If correct, second half of the month could not average much above normal without this becoming a top ten hottest May, since that seems to be just +3.0 degs. above normal.

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The GFS is finally coming around to the Euro idea of the dry pattern continuing

for at least another 10 days here. The good news is that it's showing some

much need drought relief for TX and OK. Looks like a very active pattern for JM

to track.

 

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What's the warmest May on record? The departures look to be ridiculously high through mid month at least. We might be at a +8 or +9 by the 14th.

1991 with an average of 68.7...

May.........................................................................

warmest.........coolest...........wettest............driest......

68.7 in 1991...54.3 in 1917...10.24" in 1989...0.30" in 1903

67.9 in 1880...55.2 in 1967.....9.74" in 1984...0.34" in 1887

67.0 in 1944...55.2 in 1907.....9.15" in 1978...0.57" in 1964

67.0 in 1896...56.6 in 1882.....9.10" in 1990...0.62" in 1880

66.4 in 1965...57.3 in 1924.....8.51" in 1908...0.72" in 1905

66.4 in 1959...57.4 in 1901.....8.39" in 1972...0.89" in 1939

66.0 in 1986...57.7 in 1869.....8.00" in 2013...0.95" in 1877

65.8 in 1975...57.8 in 1891.....7.61" in 1940...1.05" in 1935

65.7 in 1993...58.0 in 1888.....7.58" in 1948...1.09" in 1899

65.6 in 1980...58.2 in 1893.....7.06" in 1968...1.18" in 1944

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The GFS is finally coming around to the Euro idea of the dry pattern continuing

for at least another 10 days here. The good news is that it's showing some

much need drought relief for TX and OK. Looks like a very active pattern for JM

to track.

 

attachicon.gifgfs_namer_240_precip_ptot.gif

The only difference this run was that the southeast ridge was just a tick stronger. And whatever happens or doesn't happen with that TC into the Carolina's is going to make a big difference. The 12z GGEM likes the idea of moisture streaming North towards our area this weekend. How often do you get a TC landfall into the Carolinas and not receive any measurable precip out of it here?

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The only difference this run was that the southeast ridge was just a tick stronger. And whatever happens or doesn't happen with that TC into the Carolina's is going to make a big difference. The 12z GGEM likes the idea of moisture streaming North towards our area this weekend. How often do you get a TC landfall into the Carolinas and not receive any measurable precip out of it here?

 

Plenty of times when there is a strong ridge over the area like we have now.

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Guest Pamela

we're more likely to hit 90 than get rain from that disturbance

 

It looks as though you are getting younger; which is eminently preferable to going in the other direction.

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This looks like it's going to be only the 5th spring at NYC with a March average temperature

below 40.0 degrees and a May above 65.0 degrees. 

 

1993

1944

1896

1880

Interesting stat and quite the turnaround from much below normal to much above.

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If NYC finishes May at +3.0 or greater, then it will only be the 4th month since July 2013.

Sometimes we can get a warm -EPO pattern with a strong ridge here like July 2013.

 

Dec 14....+3.0

Oct 13.....+3.3

July 13....+3.3

will be interesting to see what the 2nd half of the month does-some longer term models now showing a cold trough in the NE starting around 5/14 or so.

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in 2000 it was 93 on this date...the hottest temp for that year...1967 had heavy rain with a max of 44...I saw wet snow flakes the day before in Brooklyn...1970 had a min. of 38...a few days later it was 90...today is a perfect Spring day...

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