

336 

WWUS20 KWNS 181757

SEL6

SPC WW 181757

LAZ000-TXZ000-CWZ000-190100-



URGENT - IMMEDIATE BROADCAST REQUESTED

TORNADO WATCH NUMBER 166

NWS STORM PREDICTION CENTER NORMAN OK

100 PM CDT SAT APR 18 2009



THE NWS STORM PREDICTION CENTER HAS ISSUED A

TORNADO WATCH FOR PORTIONS OF



       WESTERN LOUISIANA

       SOUTHEAST TEXAS

       COASTAL WATERS



EFFECTIVE THIS SATURDAY AFTERNOON AND EVENING FROM 100 PM UNTIL

800 PM CDT.



TORNADOES...HAIL TO 1 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 15 MILES NORTH NORTHWEST OF

NATCHITOCHES LOUISIANA TO 35 MILES SOUTHEAST OF PORT ARTHUR

TEXAS.  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 165...



DISCUSSION...AREA OF INTENSE THUNDERSTORMS OVER SOUTHEAST TX WILL

CONTINUE TO TRACK EASTWARD INTO WESTERN LA THIS AFTERNOON.  SEVERAL

LOW LEVEL MESOCYCLONES HAVE BEEN NOTED WITH STORMS...AND THREAT WILL

PERSIST AS ACTIVITY MOVES THROUGH REGION OF STRONG LOW LEVEL SHEAR

AND AMPLE MOISTURE.  TORNADOES AND LOCALLY DAMAGING WINDS ARE THE

MAIN THREATS.



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

SURFACE AND ALOFT TO 1 INCH. EXTREME TURBULENCE AND SURFACE WIND

GUSTS TO 60 KNOTS. A FEW CUMULONIMBI WITH MAXIMUM TOPS TO 500.

MEAN STORM MOTION VECTOR 24020.





...HART

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