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2/26 Fluffer, Light Snow Event


Baroclinic Zone

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BOX AFD. Making note of the more robust Hires models.

.SHORT TERM /6 AM THURSDAY MORNING THROUGH THURSDAY NIGHT/...

THURSDAY...

THERE IS CLUSTERING AMONG THE GUIDANCE WITH COASTAL LOW TRACKING

WELL SOUTH OF THE BENCHMARK. NORMALLY A SUPPRESSED STORM TRACK

LIKE THIS WOULD NOT PRODUCE ANY SNOW BUT THIS IS WINTER 2015 AND

WE HAVE A FEW FACTORS THAT SUGGEST OTHERWISE. MODELS INDICATE

DEEPENING MOISTURE THROUGH THE COLUMN WITH NEAR SATURATION AND

WEAK OMEGA IN THE SNOW GROWTH REGION ASSOCD WITH MODEST LARGE

SCALE FORCING AHEAD OF SHORTWAVE. THIS WILL LIKELY BRING SOME

LIGHT SNOW TO THE REGION...ESPECIALLY NEAR THE COAST. THE

UNCERTAINTY IS QPF AND SNOW AMOUNTS OVER THE CAPE/ISLANDS. ECMWF

AND SREF BRING 0.25" TO ACK WITH 0.10" TO FAR SE MA WHILE NAM IS

JUST A BIT LESS. GFS/GGEM ARE MUCH LIGHTER WITH QPF. WE HAVE

ENOUGH CONFIDENCE THAT AT LEAST SOME MINOR ACCUM ARE LIKELY FOR

THE CAPE/ISLANDS SO POPS WERE INCREASED HERE. USED A BLEND OF

NAM/SREF/ECMWF/GFS QPF TO DERIVE SNOW ACCUM WHICH RESULTS IN 1-2

INCHES FOR CAPE COD AND UP TO 3 INCHES FOR ACK. A COATING TO AN

INCH ELSEWHERE...MAINLY SOUTH OF THE MASS PIKE. SO NOT EXPECT ANY

ACCUM TO THE NORTH ALTHOUGH SOME LIGHT FLURRIES IS POSSIBLE.

OF PARTICULAR CONCERN IS THE HIRESWRF WHICH BRINGS 0.25" TO THE

CAPE COD CANAL AND 0.50" TO ACK. WE ARE NOT READY TO JUMP ON THIS

NOW BUT IT SHOWS POTENTIAL FOR HIGHER ACCUM AND WILL HAVE TO

CLOSELY MONITOR TRENDS IN THE GUIDANCE. IT WILL BE A COLD DAY WITH

TEMPS IN THE UPPER TEENS AND LOWER 20S...WITH MID/UPPER 20S

CAPE/ISLANDS.

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