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Feb 21-22 Snow/Sleet Storm Obs/Nowcasting/Weenie/Panic/Hallucinations


Ji

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AREA FORECAST DISCUSSION...UPDATED

NATIONAL WEATHER SERVICE BALTIMORE MD/WASHINGTON DC

911 PM EST MON FEB 21 2011

.SYNOPSIS...

A COLD FRONT OVER CENTRAL VIRGINIA WILL CONTINUE TO MOVE SOUTHWARD

SLOWLY THIS EVENING. LOW PRESSURE OVER THE MIDWEST WILL MOVE EAST

ALONG THE FRONT AND THROUGH THE MID-ATLANTIC STATES BY TUESDAY

MORNING. HIGH PRESSURE WILL BUILD INTO THE REGION MID-WEEK BEFORE

LOW PRESSURE IMPACTS THE MID-ATLANTIC STATES LATE THURSDAY AND

FRIDAY.

&&

.NEAR TERM /UNTIL 6 AM TUESDAY MORNING/...

-- Changed Discussion --MADE MINOR ADJUSTMENTS TO SNOW AND ICE ACCUMS OWING TO MORE WDSPRD

LGT FRZG RAIN AT ONSET. CHG TO SNOW HAS OCCURRED ACRS NRN TIER OF

CTYS AS RELAYED BY OBSERVERS. TRANSITION ZONE IS SPREADING S ATTM

AS SLEET IS OCCURRING FROM LOUDOUN TO HAMPSHIRE CTY. XPCG THIS

TRANSITION ZONE TO CONT TO MOVE SWD TNGT...WITH TRANSITION TO SNOW

FOLLOWING SHORTLY BEHIND. SNOW TOTALS WERE ADJUSTED SLGTLY ACRS

SRN PORTIONS OF HEADLINES...WITH TOTALS SLGTLY HIGHER NR MASON-

DIXON LINE.

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Hi 2/21: 39.1

9:30pm 2/21 31.1 NE-9, DP 26, mod sleet mixing with some snow

8:30pm 2/21 32.9 NE-10, DP 27, sleet

7:30pm 2/21: 34.6 NNE-11, DP 25, sleet and rain

7:00pm 2/21: 35.3, NNE 11-19 peak gust 24, DP 25, light rain

5:00pm 2/21: 38.2, NNE-11, DP 31, light rain and sleet

3:00pm 2/21: 38.7, N 11-14 peak gust 21, DP 32, Overcast

noon 2/21: 38.7, NW 3-7, DP 35, Overcast, Precip total= 0.04"

9:00am 2/21: 38.2, Wind N-9 peak gust 14, DP31.

8:30am 2/21: 38.3

Overnite Sun-Mon low 36.2, precip overnite 0.02"

Real-time temps, winds etc HERE

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