

592 

WWUS20 KWNS 232203

SEL9

SPC WW 232203

NCZ000-VAZ000-240500-



URGENT - IMMEDIATE BROADCAST REQUESTED

SEVERE THUNDERSTORM WATCH NUMBER 59

NWS STORM PREDICTION CENTER NORMAN OK

605 PM EDT WED MAR 23 2011



THE NWS STORM PREDICTION CENTER HAS ISSUED A

SEVERE THUNDERSTORM WATCH FOR PORTIONS OF



       NORTHERN NORTH CAROLINA

       SOUTHEAST VIRGINIA



EFFECTIVE THIS WEDNESDAY NIGHT AND THURSDAY MORNING FROM 605 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 30 MILES NORTH

NORTHEAST OF RICHMOND VIRGINIA TO 60 MILES SOUTHWEST OF ROANOKE

RAPIDS NORTH CAROLINA.  FOR A COMPLETE DEPICTION OF THE WATCH SEE

THE ASSOCIATED WATCH OUTLINE UPDATE (WOUS64 KWNS WOU9).



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 55...WW 56...WW 57...WW

58...



DISCUSSION...TSTMS CURRENTLY CRESTING THE BLUE RIDGE ARE EXPECTED TO

MOVE/DEVELOP EWD THROUGH THE PIEDMONT THIS EVENING WITHIN A STEEP

LAPSE RATE ENVIRONMENT ASSOCIATED WITH EML PLUME SPREADING E OF THE

APPALACHIANS.  GIVEN THE STRONG UNIDIRECTIONAL WIND FIELD IN

PLACE...POTENTIAL WILL EXIST FOR SUPERCELL AND BOWING STRUCTURES

CAPABLE OF DAMAGING WINDS AND HAIL.



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 400. MEAN STORM

MOTION VECTOR 28040.





...MEAD

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