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WWUS20 KWNS 291934

SEL3

SPC WW 291934

ARZ000-LAZ000-MSZ000-TXZ000-CWZ000-300300-



URGENT - IMMEDIATE BROADCAST REQUESTED

TORNADO WATCH NUMBER 753

NWS STORM PREDICTION CENTER NORMAN OK

130 PM CST MON NOV 29 2010



THE NWS STORM PREDICTION CENTER HAS ISSUED A

TORNADO WATCH FOR PORTIONS OF



       SOUTHERN ARKANSAS

       WESTERN AND CENTRAL LOUISIANA

       WESTERN MISSISSIPPI

       EASTERN TEXAS

       COASTAL WATERS



EFFECTIVE THIS MONDAY AFTERNOON AND EVENING FROM 130 PM UNTIL 900

PM CST.



TORNADOES...HAIL TO 1.5 INCHES IN DIAMETER...THUNDERSTORM WIND

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

AREAS.



THE TORNADO WATCH AREA IS APPROXIMATELY ALONG AND 75 STATUTE

MILES EAST AND WEST OF A LINE FROM 20 MILES EAST OF PORT ARTHUR

TEXAS TO 10 MILES NORTH OF GREENVILLE MISSISSIPPI.  FOR A

COMPLETE DEPICTION OF THE WATCH SEE THE ASSOCIATED WATCH OUTLINE

UPDATE (WOUS64 KWNS WOU3).



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.



DISCUSSION...TSTMS WILL CONTINUE TO INCREASE IN COVERAGE AND

INTENSITY THIS AFTERNOON INTO EVENING ALONG PACIFIC FRONT AND SW-NE

ORIENTED CONFLUENCE BAND WHICH ARE SLOWLY PROGRESSING EWD THROUGH

ERN TX.  18Z SUPPLEMENTAL SOUNDINGS INDICATE THAT MOISTENING AND

WARMING OF THE BOUNDARY LAYER HAVE GREATLY REDUCED THE PRONOUNCED

CAP OBSERVED AT 12Z.  GIVEN THE RELATIVELY STRONG LOW AND DEEP-LAYER

SHEAR IN PLACE...ENVIRONMENT WILL BE SUPPORTIVE OF SUPERCELLS

CAPABLE OF TORNADOES...DAMAGING WINDS AND SOME HAIL.  THIS THREAT

SHOULD DEVELOP NEWD THROUGH THE REMAINDER OF THE AFTERNOON INTO

TONIGHT ALONG RETREATING WARM FRONT AND SECONDARY SURFACE LOW

DEVELOPING THROUGH ERN AR/WRN MS.



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

SURFACE AND ALOFT TO 1.5 INCHES. EXTREME TURBULENCE AND SURFACE

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

500. MEAN STORM MOTION VECTOR 23035.





...MEAD

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