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May 2015 Discussion & Observations


dmillz25

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Philly warmest mays monthly mean temps

 

1991: 70.8

2015: 69.5 (So far)

2004: 69.2

2012: 68.2

2010: 67.5

2011: 67.4

 

-------------------------------------------------------------------------------------------------------------------------

 

Buffalo's warmest months of May on record (average temperature)

Warmest - 1991 - 64.3°

2nd place - 2012 - 63.8°

3rd place - 1944 - 63.4°

4th place - 1998 - 62.8°

5th place - 2015* - 62.3°

* as of midnight Friday.

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Through today, the average temperature in Washington (as measured at Reagan National Airport) has been 72.75F*, roughly 7 degrees above normal. That is 0.7F above 2004’s value of 72.1F, which is in second place among the warmest Mays as of this date. 1991 ranks third, at 72.0F.

 

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Warmest months of May in Syracuse

Year Average temp Rank

1. 1911 64.7 1

2. 2015 (estimated) 64.5 

3. 2012 64.3  

4. 1944 63.3  

5.1998/1975 62.9    

6. 2011 62.8  

7. 1991 62.7  

8. 1962 62.3  

9.. 1918 61.8 

For Philly most coming in recent years. The summers including May are getting a bit hotter from philly on south

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..this is the only May in the top ten warmest without a 90 degree day in Central Park...

 

Even Newark only made it to 91 for a monthly high while reaching 93 in 1991.

Newark reached  94 in May 2013 with only a +0.6 departure.

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Even Newark made it to only 91 for a monthly high.

many days in the 80's this month and some warm minimums so far...Three days with a minimum of 70...last year we had 33 days with a minimum of 70...

since 1930 70 degree minimums in KNYC...

year total min 70+ consecutive 70+

1930..........26............8

1931..........34............7

1932..........25............6

1933..........33............6

1934..........26............4

1935..........29..........11

1936..........20............4

1937..........28............6

1938..........34..........12

1939..........44..........13

1940..........24............8

1941..........27............6

1942..........20............4

1943..........30............4

1944..........41..........14

1945..........29............4

1946..........11............3

1947..........30............5

1948..........29............6

1949..........43..........10

1950..........13............5

1951..........23............7

1952..........38..........12

1953..........34..........10

1954..........18............5

1955..........45..........13

1956..........20............5

1957..........31............5

1958..........26............4

1959..........46..........10

1960..........20............5

1961..........42............9

1962............8............2

1963..........14............5

1964..........19............4

1965..........17............4

1966..........40..........11

1967..........17............5

1968..........29............6

1969..........33............6

1970..........37..........10

1971..........45............9

1972..........30..........15

1973..........37..........11

1974..........26............3

1975..........23..........12

1976..........24............4

1977..........37............9

1978..........31..........13

1979..........42..........17

1980..........52..........22

1981..........39............8

1982..........30..........12

1983..........45..........13

1984..........40..........16

1985..........34............6

1986..........31............4

1987..........32............7

1988..........42..........21

1989..........28............5

1990..........32............8

1991..........31............7

1992..........14............4

1993..........35..........10

1994..........35............9

1995..........39..........18

1996..........22............5

1997..........27............8

1998..........39..........11

1999..........45..........13

2000..........22............4

2001..........30............9

2002..........43............9

2003..........33..........15

2004..........28............6

2005..........60..........14

2006..........41..........15

2007..........35............8

2008..........35............8

2009..........18............5

2010..........54..........22

2011..........40...........9

2012..........47..........10

2013..........51..........19

2014..........33............9

2015............3............2 as of 5/30

1876..........46..........14

1902..........16............8

1903..........18............5

1906..........61..........17

1908..........54..........16

1888..........17............6

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12Z Euro continues theme of heaviest rain over NNJ with amounts falling off the

further east that you go. The main question is how much rain gets into NYC

on Sunday for the May rainfall total. NYC currently as .40 so would need

.60 by midnight to make it to an inch for May.

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12Z Euro continues theme of heaviest rain over NNJ with amounts falling off the

further east that you go. The main question is how much rain gets into NYC

on Sunday for the May rainfall total. NYC currently as .40 so would need

.60 by midnight to make it to an inch for May.

It's a nice soaker too, 2-3" of rain and it even flirts with making Tuesday a total washout. 

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.HYDROLOGY...
BETWEEN 1/2 TO 1 1/2 INCHES OF RAIN LIKELY FOR MUCH OF NYC
METRO...NE NJ...LOWER HUD VALLEY...AND SOUTHERN CT SUNDAY AFTERNOON
THROUGH SUNDAY NIGHT WITH SLOW MOVING COLD FRONT APPROACHING.
LOCALLY HIGHER AMOUNTS OF 2 TO 3 INCHES ARE POSSIBLE WITH ANY
TRAINING CONVECTION...WHICH WOULD POSE A FLASH FLOODING THREAT. THE
PROBABILITY IN ANY GIVEN LOCATION IS LOW. OF NOTE...SBU WRF IS
INDICATING POTENTIAL OF LOCALLY 3 TO 5 INCHES DURING THIS 24 HR
PERIOD.

RAINFALL AMOUNTS WILL TAPER DOWN TO 1/4 TO 1/2 INCH ACROSS EASTERN
LI AND SE CT...WITH MORE STABLE MARINE AIRMASS LIMITING CONVECTION.

AN ADDITIONAL 1 TO 2 INCHES OF RAIN POSSIBLE MONDAY THROUGH
TUESDAY. LOCALLY HIGHER AMOUNTS WILL BE POSSIBLE WITH ANY
THUNDERSTORM ACTIVITY. MINOR URBAN/POOR DRAINAGE/SMALL STREAM
FLOODING WOULD BE MOST LIKELY DURING THIS TIME.

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Mt Holly NWS..someone looks to get crushed with rain

 

TOTAL RAINFALL IS LIKELY TO RANGE FROM 1 TO 3 INCHES WITH LOCALLY
HIGHER AMOUNTS. THERE IS SOME VARIABILITY WITHIN THE GEFS, NAEFS AND
OPERATIONAL MODELS ON THE EXACT PLACEMENT OF THE HIGHEST TOTALS DUE
TO VARIABILITY IN THE FEATURES. A GENERAL CONSENSUS AT THIS TIME
YIELDS THE HIGHEST RAINFALL TOTALS ACROSS FAR EASTERN PA, NORTHERN
NJ AND THE EASTERN SHORE OF MD WITH ONLY MODERATE CONFIDENCE IN THIS
PLACEMENT. QPF GRIDS ARE MORE GENERALIZED TO ACCOUNT FOR THE
UNCERTAINTY. HIGH TEMPERATURES ARE ALSO FORECASTED A LITTLE COOLER
THAN SOME OF THE STATISTICAL AND ENSEMBLE GUIDANCE NUMBERS DUE TO
THE RAIN CHANCES AS WELL.

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Mt Holly NWS..someone looks to get crushed with rain

TOTAL RAINFALL IS LIKELY TO RANGE FROM 1 TO 3 INCHES WITH LOCALLY

HIGHER AMOUNTS. THERE IS SOME VARIABILITY WITHIN THE GEFS, NAEFS AND

OPERATIONAL MODELS ON THE EXACT PLACEMENT OF THE HIGHEST TOTALS DUE

TO VARIABILITY IN THE FEATURES. A GENERAL CONSENSUS AT THIS TIME

YIELDS THE HIGHEST RAINFALL TOTALS ACROSS FAR EASTERN PA, NORTHERN

NJ AND THE EASTERN SHORE OF MD WITH ONLY MODERATE CONFIDENCE IN THIS

PLACEMENT. QPF GRIDS ARE MORE GENERALIZED TO ACCOUNT FOR THE

UNCERTAINTY. HIGH TEMPERATURES ARE ALSO FORECASTED A LITTLE COOLER

THAN SOME OF THE STATISTICAL AND ENSEMBLE GUIDANCE NUMBERS DUE TO

THE RAIN CHANCES AS WELL.

The NAM, GGEM and to an extent the GFS and the Euro all train convection. Wouldn't at all shock me to see 4-5" totals.
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