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URGENT - IMMEDIATE BROADCAST REQUESTED

TORNADO WATCH NUMBER 844

NWS STORM PREDICTION CENTER NORMAN OK

630 PM EDT MON SEP 5 2011



THE NWS STORM PREDICTION CENTER HAS ISSUED A

TORNADO WATCH FOR PORTIONS OF



       NORTHWESTERN NORTH CAROLINA

       SOUTH-CENTRAL THROUGH WEST-CENTRAL VIRGINIA



EFFECTIVE THIS MONDAY NIGHT AND TUESDAY MORNING FROM 630 PM UNTIL

400 AM EDT.



TORNADOES...HAIL TO 0.5 INCH IN DIAMETER...THUNDERSTORM WIND

GUSTS TO 75 MPH...AND DANGEROUS LIGHTNING ARE POSSIBLE IN THESE

AREAS.



THE TORNADO WATCH AREA IS APPROXIMATELY ALONG AND 65 STATUTE

MILES EAST AND WEST OF A LINE FROM 20 MILES SOUTHWEST OF

GREENSBORO NORTH CAROLINA TO 35 MILES NORTH OF LYNCHBURG

VIRGINIA.  FOR A COMPLETE DEPICTION OF THE WATCH SEE THE

ASSOCIATED WATCH OUTLINE UPDATE (WOUS64 KWNS WOU4).



REMEMBER...A TORNADO WATCH MEANS CONDITIONS ARE FAVORABLE FOR

TORNADOES AND 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.



OTHER WATCH INFORMATION...CONTINUE...WW 840...WW 841...WW

842...WW 843...



DISCUSSION...TORNADIC SUPERCELL POTENTIAL...WITH FAVORABLE

JUXTAPOSITION OF LOW-LEVEL MOISTURE AND SHEAR...SHOULD SPREAD/SHIFT

NEWD ACROSS WW AREA THROUGH EVENING AND OVERNIGHT HOURS.  INCREASE

IN LOW-LEVEL SHEAR AND SRH SHOULD OCCUR IN STEP WITH NEWD

TRANSLATION OF REMNANTS OF T.D. LEE ALONG QUASISTATIONARY LOW-LEVEL

BAROCLINIC ZONE.  THAT FRONTAL ZONE EFFECTIVELY DEMARCATES WRN RIM

OF THREAT...AND OF WW...W OF WHICH INSTABILITY WILL DIMINISH

CONSIDERABLY.



AVIATION...TORNADOES AND A FEW SEVERE THUNDERSTORMS WITH HAIL

SURFACE AND ALOFT TO 0.5 INCH. EXTREME TURBULENCE AND SURFACE

WIND GUSTS TO 65 KNOTS. A FEW CUMULONIMBI WITH MAXIMUM TOPS TO

550. MEAN STORM MOTION VECTOR 22030.





...EDWARDS

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