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846 

WWUS20 KWNS 250251

SEL0

SPC WW 250251

OKZ000-TXZ000-250700-



URGENT - IMMEDIATE BROADCAST REQUESTED

SEVERE THUNDERSTORM WATCH NUMBER 220

NWS STORM PREDICTION CENTER NORMAN OK

955 PM CDT MON MAY 24 2010



THE NWS STORM PREDICTION CENTER HAS ISSUED A

SEVERE THUNDERSTORM WATCH FOR PORTIONS OF



       NORTHWEST OKLAHOMA

       TEXAS PANHANDLE



EFFECTIVE THIS MONDAY NIGHT AND TUESDAY MORNING FROM 955 PM UNTIL

200 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 70

STATUTE MILES EAST AND WEST OF A LINE FROM 45 MILES WEST

NORTHWEST OF ALVA OKLAHOMA TO 55 MILES EAST SOUTHEAST OF AMARILLO

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

WATCH OUTLINE UPDATE (WOUS64 KWNS WOU0).



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 215...WW 217...WW

218...WW 219...



DISCUSSION...INTENSE THUNDERSTORMS CONTINUE TO DEVELOP OVER THE TX

PANHANDLE ALONG THE SURFACE DRYLINE AS LOW LEVEL JET STRENGTHENS.

AMPLE MOISTURE/INSTABILITY AND STEEP LAPSE RATES WILL PROMOTE A RISK

OF HAIL AND DAMAGING WINDS IN THE STRONGEST CELLS.  RISING MID LEVEL

HEIGHTS AND WEAKENING WINDS ALOFT SHOULD LEAD TO A SLOW DECREASING

TREND TO CONVECTION THROUGH 07Z.



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 26020.





...HART

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