

394 

WWUS20 KWNS 071714

SEL7

SPC WW 071714

TXZ000-CWZ000-080100-



URGENT - IMMEDIATE BROADCAST REQUESTED

TORNADO WATCH NUMBER 647

NWS STORM PREDICTION CENTER NORMAN OK

1215 PM CDT TUE SEP 7 2010



THE NWS STORM PREDICTION CENTER HAS ISSUED A

TORNADO WATCH FOR PORTIONS OF



       THE I-45 CORRIDOR IN TEXAS

       COASTAL WATERS



EFFECTIVE THIS TUESDAY AFTERNOON AND EVENING FROM 1215 PM UNTIL

800 PM CDT.



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 NORTHWEST OF

CORSICANA TEXAS TO 35 MILES SOUTHEAST OF ANGLETON TEXAS.  FOR A

COMPLETE DEPICTION OF THE WATCH SEE THE ASSOCIATED WATCH OUTLINE

UPDATE (WOUS64 KWNS WOU7).



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...THIS TORNADO WATCH REPLACES TORNADO

WATCH NUMBER 646. WATCH NUMBER 646 WILL NOT BE IN EFFECT AFTER

1215 PM CDT.



DISCUSSION...RAIN BANDS WILL CONTINUE TO EXPAND EWD/NEWD IN THE

OUTER NERN/ERN PARTS OF TROPICAL STORM HERMINE...WHICH CONTINUES TO

MOVE NNWWD NEAR SAT.  THE BELT OF ENHANCED LOW-LEVEL SHEAR AND MORE

FAVORABLE INSTABILITY SHOULD REMAIN CLOSER TO THE I-45 CORRIDOR FROM

HOU TO JUST S OF DAL THROUGH THE AFTERNOON...WITH A FEW EMBEDDED

SUPERCELLS.  A TORNADO OR TWO WILL CONTINUE TO BE POSSIBLE.



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

500. MEAN STORM MOTION VECTOR 17035.





...THOMPSON

