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Possible April Snowstorm (4/9) & Observations


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- Changed Discussion --

WEAK LOW PRES WAS EMERGING FROM THE DELMARVA AT 14Z PER MSAS.

WATER VAPOR PLACED THE UPR LOW OVER WRN PA. TSTMS EVIDENT OVER THE

GULF STREAM...WITH THE RADAR COMPOSITE SHOWING PCPN ROUGHLY ACROSS

CNTRL NJ SPREADING NWD.

DRY AMS OVER THE CWA WITH DEWPOINTS IN THE 20S. EXPECT SOME

EROSION OF THE PCPN SHIELD AS IT APPROACHED THE REGION AS A

RESULT. BOTH THE RAP AND NAM KEEP THE HEAVIEST BAND OF PCPN S OF

THE REGION THIS AFTN...WITH THE BEST CHC FOR ANY BANDING THIS

EVE.

BANDS WILL BE NECESSARY FOR ANY SNOW ACCUMS...AS WETBULB ZERO

HEIGHTS ARE ABV 1000FT OUTSIDE OF ANY INTENSE BANDING.

SLOWED THE ONSET OF PCPN FOR TODAY AND REDUCED SNOWFALL THRU 18Z

FOR WRN PORTIONS OF THE CWA. NO MAJOR CHANGES THEREAFTER...HOWEVER

THE RAP SUGGESTS BEST CHC FOR ANY SNOW ACCUMS ACROSS ERN LI AFT

00Z...WITH LITTLE TO NOTHING ELSEWHERE. HAVE NOT JUMPED ON THIS

SOLN YET ALTHOUGH IT APPEARS TO BE SUPPORTED BY THE 12Z NAM.

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A friend who is in Atlantic city posted a snapchat vid and that snow is huge!

There is some very intense lifting/convection in the band down there. The radar is showing bright banding right now. The flakes are probably silver dollar sized, maybe some graupel and sleet mixing in too. With the strong uvv's, would not be surprised if they get some lightning and thunder as well
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