WATCHES: Tornado Watch Number 190

WWUS20 KWNS 260542
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SPC WW 260542
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URGENT - IMMEDIATE BROADCAST REQUESTED
TORNADO WATCH NUMBER 190
NWS STORM PREDICTION CENTER NORMAN OK
1240 AM CDT THU APR 26 2007

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

SOUTHWEST ALABAMA
SOUTHEAST LOUISIANA
SOUTHEAST MISSISSIPPI
COASTAL WATERS

EFFECTIVE THIS THURSDAY MORNING FROM 1240 AM UNTIL 800 AM CDT.

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 70 STATUTE
MILES NORTH AND SOUTH OF A LINE FROM 45 MILES SOUTHWEST OF HOUMA
LOUISIANA TO 50 MILES NORTHEAST OF MOBILE ALABAMA. FOR A
COMPLETE DEPICTION OF THE WATCH SEE THE ASSOCIATED WATCH OUTLINE
UPDATE (WOUS64 KWNS WOU0).

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...FAVORABLE SHEAR PROFILES/HODOGRAPHS ALONG WITH A MOIST
MODERATELY UNSTABLE AIR MASS SUPPORT SUPERCELL POTENTIAL WITH
CURRENT THUNDERSTORMS MOVING EWD ACROSS WATCH. AS LARGE SCALE
TROUGH SHIFTS EWD ACROSS LWR/MID MS RIVER VALLEY...THREAT OF
SUPERCELLS/ISOLATED TORNADOES WILL MOVE EWD INTO SWRN AL.

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 25030.

..HALES

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