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May 2016 Discussion/Observations


dmillz25

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45 degrees is the number for NYC to beat Monday morning. The last time that NYC

dipped below 45 degrees from May 15-31st was back in 2009 which made it down to 43.

 

NYC  hasn't dropped below 40 this time of year since 1976. So you can see the

GFS cold bias at work.

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Temperatures already running above guidance and portions of Central New Jersey

away from the sea breeze could run 75-80 degrees today. This may help to destabilize

the atmosphere more for some strong to locally severe New Jersey storms later

today. The steeper midlevel lapse rates may allow the storms to hold together enough

for some rumbles of thunder even to Long Island.

 

attachicon.giftemp8.gif

 

attachicon.gifrad12.gif

 

Seems like temps have been overperforming a bit lately. I also think todays strong/severe threat may be a bit better then what is currently being forecast especially with the temps already running above guidance.

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UPTON

 

NEAR TERM /THROUGH TONIGHT/...
Only patch river fog remains while fog has dissipated across the
remainder of the forecast area.

As low pressure passes north of New York state this afternoon, a
strong mid level disturbance and surface cold front will move
across PA, while a pre-frontal trough sets up over eastern PA and
NJ. A line of showers and a few tstms should form with the pre-
frontal trough and move into areas from NYC west late this
afternoon, then move across Long Island and southern CT this
evening. Instability with the trough will be marginal, with only
500-750 J/kg MLCAPE, but this along with DCAPE 500-1000 J/kg in
spots, presence of mid level dry air and decent unidirectional
deep layer shear with mid level SW flow up to 50 kt, suggest
organized convection with gusty winds, and the stronger cells
capable of producing localized damaging wind gusts. Storms should
weaken this evening as they pass east of NYC into a more stable
marine environment and with loss of daytime heating /sfc-based
instability. Skies clear later tonight after fropa.

 
day1otlk_1300.gif?1463231108109
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18z NAM only gives us .10-.20 this evening

 

Not much moisture available with the cold front since PWAT's are under an inch. But the steep low level lapse

rates and deep mixed layer may give some areas gusts 35-45 mph.

 

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SPECIAL WEATHER STATEMENT

NATIONAL WEATHER SERVICE NEW YORK NY

608 PM EDT SAT MAY 14 2016

CTZ005-006-009-NJZ006-104-NYZ068>075-078-080-176>179-142300-

NORTHERN FAIRFIELD-NORTHERN NEW HAVEN-SOUTHERN FAIRFIELD-EASTERN

BERGEN-HUDSON-KINGS (BROOKLYN)-NORTHERN WESTCHESTER-NEW YORK

(MANHATTAN)-ROCKLAND-PUTNAM-NORTHERN QUEENS-SOUTHERN QUEENS-SOUTHERN

NASSAU-SOUTHWEST SUFFOLK-SOUTHERN WESTCHESTER-BRONX-NORTHWEST

SUFFOLK-NORTHERN NASSAU-RICHMOND (STATEN IS.)-

608 PM EDT SAT MAY 14 2016

...A LINE OF SHOWERS WILL AFFECT NORTHWESTERN NEW HAVEN...

FAIRFIELD...HUDSON...SOUTHEASTERN BERGEN...ROCKLAND...WESTCHESTER...

BRONX...NASSAU...NEW YORK...WESTERN SUFFOLK...KINGS...QUEENS AND

PUTNAM COUNTIES...

AT 606 PM EDT...A LINE OF SHOWERS WAS ALONG A LINE EXTENDING FROM

FISHKILL TO MIDTOWN MANHATTAN TO CEDAR GLEN WEST...AND MOVING EAST AT

30 MPH.

WINDS GUSTS UP TO 40 MPH ARE POSSIBLE WITH THESE SHOWERS.

LOCATIONS IMPACTED INCLUDE...

NEW YORK...ISLIP...OYSTER BAY...JERSEY CITY...HUNTINGTON...YONKERS...

BRIDGEPORT...STAMFORD...NORWALK...DANBURY...NEW ROCHELLE...WHITE PLAINS...

HOBOKEN...FREEPORT...SHELTON...VALLEY STREAM...LONG BEACH...PORT CHESTER...

LINDENHURST AND BERGENFIELD.

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SPECIAL WEATHER STATEMENT

NATIONAL WEATHER SERVICE NEW YORK NY

608 PM EDT SAT MAY 14 2016

CTZ005-006-009-NJZ006-104-NYZ068>075-078-080-176>179-142300-

NORTHERN FAIRFIELD-NORTHERN NEW HAVEN-SOUTHERN FAIRFIELD-EASTERN

BERGEN-HUDSON-KINGS (BROOKLYN)-NORTHERN WESTCHESTER-NEW YORK

(MANHATTAN)-ROCKLAND-PUTNAM-NORTHERN QUEENS-SOUTHERN QUEENS-SOUTHERN

NASSAU-SOUTHWEST SUFFOLK-SOUTHERN WESTCHESTER-BRONX-NORTHWEST

SUFFOLK-NORTHERN NASSAU-RICHMOND (STATEN IS.)-

608 PM EDT SAT MAY 14 2016

...A LINE OF SHOWERS WILL AFFECT NORTHWESTERN NEW HAVEN...

FAIRFIELD...HUDSON...SOUTHEASTERN BERGEN...ROCKLAND...WESTCHESTER...

BRONX...NASSAU...NEW YORK...WESTERN SUFFOLK...KINGS...QUEENS AND

PUTNAM COUNTIES...

AT 606 PM EDT...A LINE OF SHOWERS WAS ALONG A LINE EXTENDING FROM

FISHKILL TO MIDTOWN MANHATTAN TO CEDAR GLEN WEST...AND MOVING EAST AT

30 MPH.

WINDS GUSTS UP TO 40 MPH ARE POSSIBLE WITH THESE SHOWERS.

LOCATIONS IMPACTED INCLUDE...

NEW YORK...ISLIP...OYSTER BAY...JERSEY CITY...HUNTINGTON...YONKERS...

BRIDGEPORT...STAMFORD...NORWALK...DANBURY...NEW ROCHELLE...WHITE PLAINS...

HOBOKEN...FREEPORT...SHELTON...VALLEY STREAM...LONG BEACH...PORT CHESTER...

LINDENHURST AND BERGENFIELD.

Decent squall blew through. Gusty winds and heavy rain for a bit. Maybe 0.10-0.20.

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More strong wind potential today behind the cold front. An unusually deep mixed layer

will allow for the possibility of wind gusts over 40 mph. Models have NYC dipping 

below 45 degrees tomorrow morning which would approach the record lows

for the day. It would be our first reading below 45 this time of May in NYC

since 2009.

 

NYC top three coldest for 

5/16

42 in 1878

42 in 1873

43 in 1983+

 

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More strong wind potential today behind the cold front. An unusually deep mixed layer

will allow for the possibility of wind gusts over 40 mph. Models have NYC dipping 

below 45 degrees tomorrow morning which would approach the record lows

for the day. It would be our first reading below 45 this time of May in NYC

since 2009.

 

NYC top three coldest for 

5/16

42 in 1878

42 in 1873

43 in 1983+

 

attachicon.gifSND.gif

...what do you see going further?

...jb still looking @ a major reversal by the time we get to

memorial day w/e..not so much major heat but rather temps

above avg..

..your opinion, sir ?

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...what do you see going further?

...jb still looking @ a major reversal by the time we get to

memorial day w/e..not so much major heat but rather temps

above avg..

..your opinion, sir ?

 

The ensembles pump the ridge over SE Canada as a trough drops into the West. But they also try to

close off a low over the SE. This would set us up coastal sections for an easterly cooler flow during the 6-10 day.

We'll need that trough to kick out after day 10 to get back into a warmer SW flow. The EPS

bring in 80+ degree potential day 10-15.

 

 

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