WATCHES: Severe Thunderstorm Watch Number 288

WWUS20 KWNS 121251
SEL8
SPC WW 121251
TXZ000-CWZ000-122000-

URGENT - IMMEDIATE BROADCAST REQUESTED
SEVERE THUNDERSTORM WATCH NUMBER 288
NWS STORM PREDICTION CENTER NORMAN OK
750 AM CDT THU MAY 12 2011

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

SOUTH TEXAS
COASTAL WATERS

EFFECTIVE THIS THURSDAY MORNING AND AFTERNOON FROM 750 AM UNTIL
300 PM CDT.

HAIL TO 2.5 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 65
STATUTE MILES EITHER SIDE OF A LINE FROM 50 MILES WEST OF HONDO
TEXAS TO 20 MILES SOUTHEAST OF CORPUS CHRISTI TEXAS. FOR A
COMPLETE DEPICTION OF THE WATCH SEE THE ASSOCIATED WATCH OUTLINE
UPDATE (WOUS64 KWNS WOU8).

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.

OTHER WATCH INFORMATION...THIS SEVERE THUNDERSTORM WATCH REPLACES
SEVERE THUNDERSTORM WATCH NUMBER 287. WATCH NUMBER 287 WILL NOT
BE IN EFFECT AFTER 750 AM CDT.

DISCUSSION...BOWING MCS WITH EMBEDDED SUPERCELLS HAS ACCELERATED TO
40 KT AND WILL CONTINUE SEWD TO THE TX COAST NEAR CRP LATER THIS
MORNING. INFLOW AIR MASS IS CHARACTERIZED BY A VERY MOIST BOUNDARY
LAYER AND STEEP MIDLEVEL LAPSE RATES WITH MUCAPE IN EXCESS OF 3000
J/KG. AS SUCH...EXPECT MCS TO REMAIN CAPABLE OF DAMAGING WINDS AND
HAIL ALONG ITS TRACK.

AVIATION...A FEW SEVERE THUNDERSTORMS WITH HAIL SURFACE AND ALOFT
TO 2.5 INCHES. EXTREME TURBULENCE AND SURFACE WIND GUSTS TO 60
KNOTS. A FEW CUMULONIMBI WITH MAXIMUM TOPS TO 600. MEAN STORM
MOTION VECTOR 33035.

...MEAD

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