WATCHES: Severe Thunderstorm Watch Number 432

WWUS20 KWNS 262024
SEL2
SPC WW 262024
TXZ000-270300-

URGENT - IMMEDIATE BROADCAST REQUESTED
SEVERE THUNDERSTORM WATCH NUMBER 432
NWS STORM PREDICTION CENTER NORMAN OK
325 PM CDT TUE JUN 26 2012

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

SOUTH CENTRAL AND SOUTHEAST TEXAS

EFFECTIVE THIS TUESDAY AFTERNOON AND EVENING FROM 325 PM UNTIL
1000 PM 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 EITHER SIDE OF A LINE FROM 45 MILES SOUTHEAST OF
COLLEGE STATION TEXAS TO 45 MILES SOUTH SOUTHWEST OF SAN ANTONIO
TEXAS. FOR A COMPLETE DEPICTION OF THE WATCH SEE THE ASSOCIATED
WATCH OUTLINE UPDATE (WOUS64 KWNS WOU2).

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 431...

DISCUSSION...STORMS ARE DEVELOPING TO THE NORTHWEST OF HOUSTON
WITHIN AN ENVIRONMENT CHARACTERIZED BY STEEP LAPSE RATES AND A
DEEPLY MIXED BOUNDARY LAYER. SURFACE TEMPERATURES NEAR 100 AND DEW
POINTS OF 60-65 ARE CONTRIBUTING TO AMPLE INSTABILITY /SBCAPE OF
2500-3500 J PER KG/ FOR STRONG UPDRAFTS...AND LOWER LEVEL INVERTED-V
STRUCTURE SI RESULTING IN STRONG DCAPE OF 1200-1500 J/KG. STORMS
WILL HAVE POTENTIAL TO PRODUCE DAMAGING WIND GUSTS AND LARGE HAIL AS
THEY DEVELOP/SPREAD SWWD AT 25-30 KT.

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 550. MEAN STORM
MOTION VECTOR 05025.


...WEISS

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