

985 

WWUS20 KWNS 271758

SEL1

SPC WW 271758

NCZ000-VAZ000-WVZ000-280200-



URGENT - IMMEDIATE BROADCAST REQUESTED

SEVERE THUNDERSTORM WATCH NUMBER 531

NWS STORM PREDICTION CENTER NORMAN OK

155 PM EDT FRI JUL 27 2012



THE NWS STORM PREDICTION CENTER HAS ISSUED A

SEVERE THUNDERSTORM WATCH FOR PORTIONS OF



       NORTHERN NORTH CAROLINA

       CENTRAL AND SOUTHERN VIRGINIA

       FAR SOUTHEASTERN WEST VIRGINIA



EFFECTIVE THIS FRIDAY AFTERNOON AND EVENING FROM 155 PM UNTIL

1000 PM EDT.



HAIL TO 1 INCH 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 95

STATUTE MILES EAST AND WEST OF A LINE FROM 40 MILES EAST

NORTHEAST OF CHARLOTTESVILLE VIRGINIA TO 60 MILES WEST SOUTHWEST

OF DANVILLE VIRGINIA.  FOR A COMPLETE DEPICTION OF THE WATCH SEE

THE ASSOCIATED WATCH OUTLINE UPDATE (WOUS64 KWNS WOU1).



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.



DISCUSSION...TSTMS EXPECTED TO FORM/INCREASE ALONG NE-SW LEE TROUGH

FROM CNTRL VA INTO NW NC.  OTHER STORMS EXPECTED TO FORM/STRENGTHEN

ALONG AND E OF NE-SW DIFFUSE OUTFLOW BOUNDARY LEFT BY OVERNIGHT

STORMS IN SRN WV. STEEPENING LOW LVL LAPSE RATES AND MODERATE

UNIDIRECTIONAL DEEP WSW FLOW SUGGEST POTENTIAL FOR BOWING SEGMENTS

WITH DMGG WIND.  SOME POTENTIAL ALSO WILL EXIST FOR UPSCALE

DEVELOPMENT INTO A LARGER SCALE...SLIGHTLY-BOWING SQLN. SUCH

EVOLUTION WOULD EXTEND A RISK FOR DMGG WIND ENE TOWARD THE MID/LWR

THE CHESAPEAKE BAY THIS EVE.



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

TO 1 INCH. EXTREME TURBULENCE AND SURFACE WIND GUSTS TO 60 KNOTS.

A FEW CUMULONIMBI WITH MAXIMUM TOPS TO 550. MEAN STORM MOTION

VECTOR 26025.





...CORFIDI

