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306 

WWUS20 KWNS 092225

SEL4

SPC WW 092225

DEZ000-MDZ000-NCZ000-VAZ000-CWZ000-100500-



URGENT - IMMEDIATE BROADCAST REQUESTED

SEVERE THUNDERSTORM WATCH NUMBER 284

NWS STORM PREDICTION CENTER NORMAN OK

620 PM EDT SAT MAY 9 2009



THE NWS STORM PREDICTION CENTER HAS ISSUED A

SEVERE THUNDERSTORM WATCH FOR PORTIONS OF



       SOUTHERN DELAWARE

       SOUTHERN AND EASTERN MARYLAND

       EASTERN NORTH CAROLINA

       EASTERN VIRGINIA

       COASTAL WATERS



EFFECTIVE THIS SATURDAY NIGHT AND SUNDAY MORNING FROM 620 PM

UNTIL 100 AM EDT.



HAIL TO 1.5 INCHES IN DIAMETER...THUNDERSTORM WIND GUSTS TO 70

MPH...AND DANGEROUS LIGHTNING ARE POSSIBLE IN THESE AREAS.



THE SEVERE THUNDERSTORM WATCH AREA IS APPROXIMATELY ALONG AND 70

STATUTE MILES EAST AND WEST OF A LINE FROM 45 MILES NORTH

NORTHEAST OF SALISBURY MARYLAND TO 30 MILES SOUTH SOUTHWEST OF

GOLDSBORO NORTH CAROLINA.  FOR A COMPLETE DEPICTION OF THE WATCH

SEE THE ASSOCIATED WATCH OUTLINE UPDATE (WOUS64 KWNS WOU4).



REMEMBER...A SEVERE THUNDERSTORM WATCH MEANS CONDITIONS ARE

FAVORABLE FOR SEVERE THUNDERSTORMS IN AND CLOSE TO THE WATCH

AREA. PERSONS IN THESE AREAS SHOULD BE ON THE LOOKOUT FOR

THREATENING WEATHER CONDITIONS AND LISTEN FOR LATER STATEMENTS

AND POSSIBLE WARNINGS. SEVERE THUNDERSTORMS CAN AND OCCASIONALLY

DO PRODUCE TORNADOES.



OTHER WATCH INFORMATION...CONTINUE...WW 280...WW 281...WW

282...WW 283...



DISCUSSION...SMALL NNE-SSW SQLN MCS IN CNTRL NC...AND ISOLD

SUSTAINED STORMS OVER ERN VA...EXPECTED TO CONTINUE GENERALLY ENE AT

40 KTS.  WARM BOUNDARY LAYER AHEAD OF STORMS...MODERATE LARGELY

UNIDIRECTIONAL DEEP WSW FLOW...AND LARGE SCALE ASCENT AHEAD OF MID

LVL IMPULSE TOGETHER SUGGEST A THREAT FOR LOCALLY DMGG WIND GUSTS

AND SOME HAIL THROUGH MID/LATE EVE.



AVIATION...A FEW SEVERE THUNDERSTORMS WITH HAIL SURFACE AND ALOFT

TO 1.5 INCHES. EXTREME TURBULENCE AND SURFACE WIND GUSTS TO 60

KNOTS. A FEW CUMULONIMBI WITH MAXIMUM TOPS TO 500. MEAN STORM

MOTION VECTOR 26040.





...CORFIDI

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