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President's Day Weekend 2015 Storm Potential 2/14-2/15


bluewave

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2-4 is more likely with windswept snow.Hopefully the trough sets up shop over the area so we can all get buried. Man, I wish I lived in SNE. Another 12+ for them and possibly more next week.

I love snow too Ant, but they're situation up there from Boston to Maine is becoming seriously disruptive and life threatening...definitely historic but dangerous...any the added extreme cold won't help.
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MODEL DIAGNOSTIC DISCUSSION
NWS WEATHER PREDICTION CENTER COLLEGE PARK MD
135 AM EST FRI FEB 13 2015

 

...POWERFUL UPPER TROUGH/VORTEX CROSSING THE GREAT LAKES AND
NORTHEAST...
...INTENSE SURFACE LOW DEVELOPMENT OFF NEW ENGLAND ON SUN...

PREFERENCE: NON-GEM CONSENSUS
CONFIDENCE: AVERAGE

ON THE LARGER SCALE...THE MODELS ARE IN EXCELLENT AGREEMENT ON A
POWERFUL TROUGH AMPLIFYING ACROSS THE GREAT LAKES REGION AND
THROUGH THE NORTHERN MID-ATLANTIC AND NEW ENGLAND SAT AND SUN. THE
GUIDANCE SHOWS AN INTENSE VORTEX EMBEDDED WITHIN THE TROUGH
CROSSES THE REGION...AND THIS ENERGY IS EXPECTED TO RESULT IN A
VERY INTENSE LOW CENTER DEVELOPING OFFSHORE NEW ENGLAND ON SUN.
AFTER ABOUT 48 HOURS...THE 00Z GFS AND 00Z UKMET TEND TO BE A BIT
FASTER THAN THE 00Z NAM/00Z ECMWF AND 00Z GEM WITH THE HEIGHT FALL
EVOLUTION. HOWEVER...AT THE SURFACE...THERE IS ACTUALLY FAIRLY
GOOD AGREEMENT WITH THE IDEA OF A VERY INTENSE LOW CENTER WRAPPING
UP CLOSE TO THE 40N/70W BENCHMARK AND THEN LIFTING NORTH TO NEAR
THE GULF OF MAINE SUN MORNING. THE GFS AND ECMWF ARE A BIT LEFT OF
THE NAM AND UKMET...WITH THE GEM BECOMING A BIT OF AN OUTLIER IN
BEING A BIT FARTHER SOUTH AND EAST AND ALSO SOMEWHAT SLOWER. THE
LATEST SPREAD WITHIN THE GEFS AND ECENS MEMBERS FAVORS THE IDEA OF
GOING WITH A NON-GEM CONSENSUS...OR ESSENTIALLY A BLEND OF THE
NAM/GFS/UKMET AND ECMWF SOLUTIONS.

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West of the city this is a 6-8hr burst of steady light to moderate snow. Over Long Island it could last well into Sunday morning.

Starting to come into a consensus. Light to moderate snow event with howling winds. The NAM digs the 500mb low ever so slightly further south but it isn't enough

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