Severe Local Storm Watch and Watch Cancellation 11:28:17.1091

THE UNIVERSITY OF TEXAS AT TYLER
University Operations Center (UOC)

This is an automatically generated special information alert from the UT Tyler Office of Emergency Management:

WWUS20 KWNS 251631
SEL2
SPC WW 251631
TXZ000-252300-

URGENT - IMMEDIATE BROADCAST REQUESTED
SEVERE THUNDERSTORM WATCH NUMBER 62
NWS STORM PREDICTION CENTER NORMAN OK
1125 AM CDT WED MAR 25 2009

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

PARTS OF CENTRAL AND NORTH TEXAS

EFFECTIVE THIS WEDNESDAY MORNING AND EVENING FROM 1125 AM UNTIL
600 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 70
STATUTE MILES NORTH AND SOUTH OF A LINE FROM 25 MILES NORTH
NORTHWEST OF SAN ANGELO TEXAS TO 40 MILES NORTHEAST OF CORSICANA
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.

DISCUSSION...ELEVATED THUNDERSTORMS WILL CONTINUE TO INCREASE IN
COVERAGE AND INTENSITY ACROSS CENTRAL AND N TX OVER THE NEXT FEW
HOURS...AS ISENTROPIC LIFT STRENGTHENS ATOP THE LOW-LEVEL FRONTAL
SURFACE IN RESPONSE TO THE APPROACHING MID-LEVEL SHORT-WAVE TROUGH.
WITH 50 TO 60 KT MID-LEVEL WSWLYS ATOP VEERING LOW-LEVEL
FLOW...SHEAR WILL SUPPORT ROTATING/SUPERCELL STORMS. WHILE AN
ISOLATED DAMAGING WIND GUST WILL BE POSSIBLE -- PARTICULARLY OVER
SRN PORTIONS OF THE WATCH -- GIVEN POTENTIAL FOR SOME DOWNDRAFT
ENHANCEMENT DUE TO SUB-CLOUD EVAPORATIVE COOLING...PRIMARY THREAT
WILL BE LARGE HAIL.

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 450. MEAN STORM
MOTION VECTOR 24035.

...GOSS

P. Low/UOC
END OF ALERT