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8.13-8.15 rain and storm event


Ian

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:unsure:

AREA FORECAST DISCUSSION NATIONAL WEATHER SERVICE BALTIMORE MD/WASHINGTON DC 918 PM EDT SUN AUG 14 2011 .SYNOPSIS... LOW PRESSURE OVER VIRGINIA WILL GRADUALLY MOVE AWAY FROM THE COAST TUESDAY. HIGH PRESSURE BUILDS IN FOR WEDNESDAY...THEN ANOTHER SYSTEM IMPACTS THE REGION FOR THE LATTER PORTIONS OF THE WEEK. && .NEAR TERM /OVERNIGHT/... STILL KEEPING OUR EYES ON THE STORMS XTNDG FM FREDERICK CO MD DOWN INTO CENTRAL VA. ATTM STORMS ARE BLO SVR LIMITS - JUST GOT A CALL FM ASHBURN REPORTING G40 MPH...WHICH CORRESPONDS QUITE WELL TO THE RDR VELOCITY IMAGE. FORWARD MVMNT OF STORMS IS QUITE SLOW - SE ABT 18 KTS. IT MAY BE THAT DC GETS A PD OF HVY RAIN FM 10-11 PM. WITH UPPER LOW ROTATING THROUGH THERE STILL MAY BE LINGERING SHOWERS AND THUNDERSTORMS OVERNIGHT.

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I feel like this has a chance of missing DC itself just to the north. Please give me a reason to believe in this thing.

hard to say.. on present course i would think we wouldnt get a lot but it has been redeveloping southeast. i think it's probably a negative we had an outflow boundary push through from the piece to the north and then we'll get another from the west.

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DAY 1 CONVECTIVE OUTLOOK

NWS STORM PREDICTION CENTER NORMAN OK

0744 PM CDT SUN AUG 14 2011

VALID 150100Z - 151200Z

..THERE IS A SLGT RISK OF SVR TSTMS OVER THE MID ATLANTIC REGION

...THERE IS A SLGT RISK OF SVR TSTMS FROM NERN CO/NWRN KS INTO CNTRL

SD...

..MID ATLANTIC

AMPLE INSTABILITY REMAINS IN PLACE FROM THE ERN CAROLINAS INTO THE

DELMARVA AHEAD OF AN ADVANCING COLD FRONT. NUMEROUS STORMS EXISTED

ALONG THE FRONT AS OF 01Z. 00Z SOUNDINGS SHOW MODERATELY STRONG MID

TO UPPER LEVEL WINDS...BUT WINDS IN THE LOWEST 3KM REMAIN RELATIVELY

WEAK AT AROUND 15 KT. WITH THE LOSS OF HEATING...THIS WILL RESULT IN

A LESSENING LARGE HAIL THREAT...BUT DAMAGING WINDS WILL CONTINUE TO

BE A THREAT ESPECIALLY WITH CONSOLIDATED STORM CLUSTERS. STORMS ARE

LIKELY TO PERSIST INTO THE EVENING GIVEN COOLING AND LIFT WITH THE

UPPER TROUGH...AND WITH LITTLE IF ANY CAPPING POTENTIAL.

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