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WWUS20 KWNS 070101

SEL5

SPC WW 070101

TXZ000-CWZ000-071000-



URGENT - IMMEDIATE BROADCAST REQUESTED

TORNADO WATCH NUMBER 645

NWS STORM PREDICTION CENTER NORMAN OK

800 PM CDT MON SEP 6 2010



THE NWS STORM PREDICTION CENTER HAS ISSUED A

TORNADO WATCH FOR PORTIONS OF



       SOUTH TEXAS

       COASTAL WATERS



EFFECTIVE THIS MONDAY NIGHT AND TUESDAY MORNING FROM 800 PM UNTIL

500 AM CDT.



TORNADOES...THUNDERSTORM WIND GUSTS TO 70 MPH...AND DANGEROUS

LIGHTNING ARE POSSIBLE IN THESE AREAS.



THE TORNADO WATCH AREA IS APPROXIMATELY ALONG AND 55 STATUTE

MILES EAST AND WEST OF A LINE FROM 15 MILES EAST SOUTHEAST OF

BROWNSVILLE TEXAS TO 15 MILES NORTH NORTHEAST OF BEEVILLE TEXAS.

FOR A COMPLETE DEPICTION OF THE WATCH SEE THE ASSOCIATED WATCH

OUTLINE UPDATE (WOUS64 KWNS WOU5).



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 644...



DISCUSSION...PER LATEST NHC FCST...TS HERMINE SHOULD MAKE LANDFALL

SOON AFTER WW ISSUANCE AND MOVE NNWWD ACROSS LOWER RIO GRANDE VALLEY

REGION OVER DEEP S TX.  ASSOCIATED RISK FOR MINI-SUPERCELLS AND A

FEW BRIEF TORNADOES SHOULD BE WITHIN SMALL SECTOR NNW-NE-SE OF

CENTER OF THIS RELATIVELY COMPACT SYSTEM...WHERE AT LEAST MRGL

BUOYANCY AND ENLARGED LOW-LEVEL HODOGRAPHS WILL BE PRESENT AS

EVIDENT IN 00Z BRO RAOB AND VWP.  THIS REGIME SHOULD SHIFT NNWWD AND

NWD UP COASTLINE IN STEP WITH TRANSLATION OF CENTER OF HERMINE.



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

TURBULENCE AND SURFACE WIND GUSTS TO 60 KNOTS. A FEW CUMULONIMBI

WITH MAXIMUM TOPS TO 550. MEAN STORM MOTION VECTOR 13035.





...EDWARDS/HART

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