WATCHES: Severe Thunderstorm Watch Number 142

WWUS20 KWNS 272207
SEL2
SPC WW 272207
TXZ000-CWZ000-280600-

URGENT - IMMEDIATE BROADCAST REQUESTED
SEVERE THUNDERSTORM WATCH NUMBER 142
NWS STORM PREDICTION CENTER NORMAN OK
505 PM CDT SAT APR 27 2013

THE NWS STORM PREDICTION CENTER HAS ISSUED A

* SEVERE THUNDERSTORM WATCH FOR PORTIONS OF
SOUTH TEXAS
COASTAL WATERS

* EFFECTIVE THIS SATURDAY AFTERNOON AND SUNDAY MORNING FROM 505
PM UNTIL 100 AM CDT.

* PRIMARY THREATS INCLUDE...
SEVERAL VERY LARGE HAIL EVENTS TO 3 INCHES IN DIAMETER POSSIBLE
SEVERAL DAMAGING WIND GUSTS WITH A FEW SIGNIFICANT GUSTS TO 75
MPH POSSIBLE

THE SEVERE THUNDERSTORM WATCH AREA IS APPROXIMATELY ALONG AND 70
STATUTE MILES NORTH AND SOUTH OF A LINE FROM DEL RIO TEXAS TO 30
MILES EAST SOUTHEAST OF HUNTSVILLE TEXAS. FOR A COMPLETE
DEPICTION OF THE WATCH SEE THE ASSOCIATED WATCH OUTLINE UPDATE
(WOUS64 KWNS WOU2).

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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...CONTINUE...WW 141...

DISCUSSION...TSTMS FCST TO CONTINUE INCREASING IN COVERAGE THROUGH
AT LEAST EARLY EVENING ACROSS THIS AREA IN FRONTAL AND SEA-BREEZE
REGIMES...WITH OUTFLOW-BOUNDARY INTERSECTIONS ALSO OFFERING
LOCALIZED FOCI FOR TSTM INITIATION AND MAINTENANCE. WITH WWD EXTENT
ACROSS WW AREA...EXPECT GREATER DEEP SHEAR...BUOYANCY...AND EXPECTED
ORGANIZATION OF SVR POTENTIAL...INCLUDING RISK OF
SIGNIFICANT/DAMAGING HAIL WITH ANY RELATIVELY DISCRETE SUPERCELLS.
HOWEVER...OVERALL COVERAGE MAY CONTINUE TO BE GREATER WITH EWD
EXTENT INTO SOMEWHAT WEAKER PARAMETER SPACE. DAMAGING GUSTS AND
LARGE HAIL THEREFORE ARE POSSIBLE ACROSS ENTIRE WW AREA.

AVIATION...A FEW SEVERE THUNDERSTORMS WITH HAIL SURFACE AND ALOFT
TO 3 INCHES. EXTREME TURBULENCE AND SURFACE WIND GUSTS TO 65
KNOTS. A FEW CUMULONIMBI WITH MAXIMUM TOPS TO 500. MEAN STORM
MOTION VECTOR 30025.


...EDWARDS

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