Severe Local Storm Watch and Watch Cancellation 00:40:56.5451

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 120544
SEL1
SPC WW 120544
TXZ000-121300-

URGENT - IMMEDIATE BROADCAST REQUESTED
SEVERE THUNDERSTORM WATCH NUMBER 141
NWS STORM PREDICTION CENTER NORMAN OK
1240 AM CDT SUN APR 12 2009

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

SOUTHWEST THROUGH WESTERN NORTH TEXAS

EFFECTIVE THIS SUNDAY MORNING FROM 1240 AM UNTIL 800 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 75
STATUTE MILES EAST AND WEST OF A LINE FROM 35 MILES NORTHWEST OF
MINERAL WELLS TEXAS TO 15 MILES EAST OF DEL RIO 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...THIS SEVERE THUNDERSTORM WATCH REPLACES
SEVERE THUNDERSTORM WATCH NUMBER 140. WATCH NUMBER 140 WILL NOT
BE IN EFFECT AFTER 1240 AM CDT.

DISCUSSION...TSTMS EXPECTED TO INCREASE IN STRENGTH THROUGH THE
OVERNIGHT FROM THE BIG BEND REGION NNE ACROSS THE WRN HILL COUNTRY
INTO WRN N TX AS LEAD WAVE OF HEIGHT FALLS ASSOCIATED WITH NM UPR
LOW OVERSPREAD NWRN EDGE OF QUALITY MOISTURE RETURN. STORMS LIKELY
WILL REMAIN SOMEWHAT ELEVATED...ESPECIALLY WITH NWD EXTENT...BUT
SUFFICIENT MUCAPE LIKELY WILL EXIST FOR SVR HAIL GIVEN PRESENCE OF
SUFFICIENT CLOUD LAYER SHEAR FOR EMBEDDED SUSTAINED STORMS/POSSIBLE
SUPERCELLS. SOME THREAT WILL ALSO EXIST FOR BOWING
SEGMENTS...ALTHOUGH POTENTIAL FOR ANY ASSOCIATED SVR WIND THREAT AT
THE SFC WILL BE MITIGATED BY LOW LVL STABLE LAYER.

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 450. MEAN STORM
MOTION VECTOR 21040.

...CORFIDI

P. Low/UOC
END OF ALERT