WATCHES: Severe Thunderstorm Watch Number 81

WWUS20 KWNS 030348
SEL1
SPC WW 030348
TXZ000-031000-

URGENT - IMMEDIATE BROADCAST REQUESTED
SEVERE THUNDERSTORM WATCH NUMBER 81
NWS STORM PREDICTION CENTER NORMAN OK
1045 PM CDT TUE APR 2 2013

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

SOUTHERN TEXAS

EFFECTIVE THIS TUESDAY NIGHT AND WEDNESDAY MORNING FROM 1045 PM
UNTIL 500 AM CDT.

HAIL TO 2 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 50
STATUTE MILES EAST AND WEST OF A LINE FROM 65 MILES NORTHEAST OF
COTULLA TEXAS TO 40 MILES EAST SOUTHEAST OF LAREDO TEXAS. FOR A
COMPLETE DEPICTION OF THE WATCH SEE THE ASSOCIATED WATCH OUTLINE
UPDATE (WOUS64 KWNS WOU1).

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 79...WW 80...

DISCUSSION...AN EVOLVING QLCS --ANCHORED BY A SUPERCELL ON IT/S SRN
END-- OVER THE EDWARDS PLATEAU IS EXPECTED TO PROGRESS ESEWD THROUGH
PORTIONS OF THE HILL AND BRUSH COUNTRY OF TX INTO EARLY
WEDNESDAY...AIDED BY FORCING FOR ASCENT ATTENDANT TO A SHORT-WAVE
TROUGH MOVING THROUGH WRN TX. AN OUTFLOW BOUNDARY WHICH HAS SETTLED
SWD TO ALONG A FRIO TO KARNES COUNTY LINE...WILL LIKELY DELIMIT THE
NRN BOUND OF MORE ORGANIZED STORM POTENTIAL. THE TO SOUTH...THE
COMBINATION OF A MOIST...MODERATELY UNSTABLE AIR MASS AND 40-45 KT
OF DEEP-LAYER SHEAR WILL PROMOTE ORGANIZED STORM MODES WITH A RISK
FOR DAMAGING WINDS AND LARGE HAIL.

AVIATION...A FEW SEVERE THUNDERSTORMS WITH HAIL SURFACE AND ALOFT
TO 2 INCHES. EXTREME TURBULENCE AND SURFACE WIND GUSTS TO 60
KNOTS. A FEW CUMULONIMBI WITH MAXIMUM TOPS TO 500. MEAN STORM
MOTION VECTOR 28030.


...MEAD

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