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185 

WWUS20 KWNS 192247

SEL2

SPC WW 192247

TXZ000-200400-



URGENT - IMMEDIATE BROADCAST REQUESTED

SEVERE THUNDERSTORM WATCH NUMBER 52

NWS STORM PREDICTION CENTER NORMAN OK

545 PM CDT SAT MAR 19 2011



THE NWS STORM PREDICTION CENTER HAS ISSUED A

SEVERE THUNDERSTORM WATCH FOR PORTIONS OF



       PARTS OF THE TEXAS PANHANDLE AND WEST TEXAS



EFFECTIVE THIS SATURDAY AFTERNOON AND EVENING FROM 545 PM UNTIL

1100 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 60

STATUTE MILES EAST AND WEST OF A LINE FROM 50 MILES WEST

NORTHWEST OF CHILDRESS TEXAS TO 80 MILES SOUTH OF LUBBOCK 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...THUNDERSTORMS ARE DEVELOPING ALONG SURFACE CONVERGENCE

ZONE WITHIN  A SLY FLOW OF MDTLY UNSTABLE AIR. MLCAPES LOCALLY TO

1500 J/KG COMBINED WITH STEEP LAPSE RATES AND 40-50KT OF BULK SHEAR

DO SUPPORT POTENTIAL FOR SUPERCELLS. EXPECT STORMS TO INTENSITY AND

MOVE EWD ACROSS THE WATCH WITH LARGE HAIL THE PRIMARY THREAT.



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 500. MEAN STORM

MOTION VECTOR 22025.





...HALES

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