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WWUS20 KWNS 061344

SEL6

SPC WW 061344

NCZ000-SCZ000-070000-



URGENT - IMMEDIATE BROADCAST REQUESTED

TORNADO WATCH NUMBER 846

NWS STORM PREDICTION CENTER NORMAN OK

945 AM EDT TUE SEP 6 2011



THE NWS STORM PREDICTION CENTER HAS ISSUED A

TORNADO WATCH FOR PORTIONS OF



       WESTERN NORTH CAROLINA

       NORTHWEST SOUTH CAROLINA



EFFECTIVE THIS TUESDAY MORNING AND EVENING FROM 945 AM UNTIL 800

PM EDT.



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

GUSTS TO 70 MPH...AND DANGEROUS LIGHTNING ARE POSSIBLE IN THESE

AREAS.



THE TORNADO WATCH AREA IS APPROXIMATELY ALONG AND 60 STATUTE

MILES EAST AND WEST OF A LINE FROM 30 MILES NORTHEAST OF HICKORY

NORTH CAROLINA TO 40 MILES SOUTH SOUTHWEST OF CHARLOTTE NORTH

CAROLINA.  FOR A COMPLETE DEPICTION OF THE WATCH SEE THE

ASSOCIATED WATCH OUTLINE UPDATE (WOUS64 KWNS WOU6).



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 845...



DISCUSSION...TSTMS SHOULD GRADUALLY INCREASE IN COVERAGE THIS

MORNING IN ADVANCE OF DEEP-LAYER CYCLONE LIFTING NWD THROUGH THE SRN

APPALACHIANS.  12Z RNK/GSO SOUNDINGS INDICATE THAT ENVIRONMENT IS

ALREADY NEARLY UNCAPPED AND FURTHER DAYTIME HEATING SHOULD BOOST

MLCAPE VALUES TO AOA 1000-1500 J/KG.  GIVEN THAT THE WATCH AREA WILL

RESIDE BENEATH 50-60 KT SLY FLOW AT 500 MB WITH A SELY LOW-LEVEL

WIND FIELD...SUFFICIENT VERTICAL SHEAR WILL EXIST FOR SUPERCELLS

CAPABLE OF DAMAGING WINDS AND PERHAPS A COUPLE OF TORNADOES.



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

SURFACE AND ALOFT TO 0.5 INCH. EXTREME TURBULENCE AND SURFACE

WIND GUSTS TO 60 KNOTS. A FEW CUMULONIMBI WITH MAXIMUM TOPS TO

400. MEAN STORM MOTION VECTOR 19030.





...MEAD

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