

676 

WWUS20 KWNS 170437

SEL8

SPC WW 170437

TXZ000-171100-



URGENT - IMMEDIATE BROADCAST REQUESTED

SEVERE THUNDERSTORM WATCH NUMBER 158

NWS STORM PREDICTION CENTER NORMAN OK

1135 PM CDT THU APR 16 2009



THE NWS STORM PREDICTION CENTER HAS ISSUED A

SEVERE THUNDERSTORM WATCH FOR PORTIONS OF



       PARTS OF NORTH CENTRAL AND SOUTHWEST TEXAS



EFFECTIVE THIS THURSDAY NIGHT AND FRIDAY MORNING FROM 1135 PM

UNTIL 600 AM CDT.



HAIL TO 1.5 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 60

STATUTE MILES EAST AND WEST OF A LINE FROM 80 MILES NORTH

NORTHEAST OF ABILENE TEXAS TO 20 MILES SOUTHEAST OF DEL RIO

TEXAS.  FOR A COMPLETE DEPICTION OF THE WATCH SEE THE ASSOCIATED

WATCH OUTLINE UPDATE (WOUS64 KWNS WOU8).



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 157...



DISCUSSION...EVENING SEVERE STORMS OVER SWRN TX EXPECTED TO CONTINUE

EWD AND DEVELOP INTO MORE OF A LINEAR MODE.  WITH STRONG SHEAR AND

MDT INSTABILITY/MOISTURE STILL AVAILABLE...ISOLATED SUPERCELLS STILL

A POSSIBILITY.  HOWEVER PRIMARY THREAT EXPECTED TO BE DAMAGING WINDS

AND HAIL AS CONVECTIVE INHIBITION GRADUALLY REDUCES THREAT OF

SURFACE BASED STORMS AND TORNADO POTENTIAL.



AVIATION...A FEW SEVERE THUNDERSTORMS WITH HAIL SURFACE AND ALOFT

TO 1.5 INCHES. EXTREME TURBULENCE AND SURFACE WIND GUSTS TO 60

KNOTS. A FEW CUMULONIMBI WITH MAXIMUM TOPS TO 500. MEAN STORM

MOTION VECTOR 25030.





...HALES

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