WATCHES: Severe Thunderstorm Watch Number 204

WWUS20 KWNS 280211
SEL4
SPC WW 280211
LAZ000-CWZ000-280600-

URGENT - IMMEDIATE BROADCAST REQUESTED
SEVERE THUNDERSTORM WATCH NUMBER 204
NWS STORM PREDICTION CENTER NORMAN OK
910 PM CDT MON APR 27 2009

THE NWS STORM PREDICTION CENTER HAS ISSUED A
SEVERE THUNDERSTORM WATCH FOR PORTIONS OF

SOUTHWEST LOUISIANA
COASTAL WATERS

EFFECTIVE THIS MONDAY NIGHT AND TUESDAY MORNING FROM 910 PM UNTIL
100 AM CDT.

HAIL TO 1.5 INCHES IN DIAMETER...THUNDERSTORM WIND GUSTS TO 70
MPH...AND DANGEROUS LIGHTNING ARE POSSIBLE IN THESE AREAS.

THE SEVERE THUNDERSTORM WATCH AREA IS APPROXIMATELY ALONG AND 55
STATUTE MILES EAST AND WEST OF A LINE FROM 25 MILES NORTHEAST OF
FORT POLK LOUISIANA TO 55 MILES SOUTHWEST OF INTRACOASTAL CITY
LOUISIANA. FOR A COMPLETE DEPICTION OF THE WATCH SEE THE
ASSOCIATED WATCH OUTLINE UPDATE (WOUS64 KWNS WOU4).

REMEMBER...A SEVERE THUNDERSTORM WATCH MEANS CONDITIONS ARE
FAVORABLE FOR 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. SEVERE THUNDERSTORMS CAN AND OCCASIONALLY
DO PRODUCE TORNADOES.

DISCUSSION...SMALL LINEAR MCS WITH EMBEDDED BOW ECHOES AND BRIEF
SUPERCELL STRUCTURES WILL CONTINUE EWD ACROSS SWRN LA THIS EVENING.
LOW LEVEL SHEAR WILL REMAIN SUPPORTIVE OF BRIEF LOW LEVEL
ROTATIONS/POSSIBLE TORNADO...IN ADDITION TO A BROADER THREAT OF
STRONG TO DAMAGING WINDS FOR A FEW MORE HOURS.

AVIATION...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 27035.

...EVANS

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