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WWUS20 KWNS 241927

SEL4

SPC WW 241927

OKZ000-TXZ000-250200-



URGENT - IMMEDIATE BROADCAST REQUESTED

SEVERE THUNDERSTORM WATCH NUMBER 194

NWS STORM PREDICTION CENTER NORMAN OK

230 PM CDT SUN APR 24 2011



THE NWS STORM PREDICTION CENTER HAS ISSUED A

SEVERE THUNDERSTORM WATCH FOR PORTIONS OF



       CENTRAL AND SOUTHERN OKLAHOMA

       SMALL PART OF WESTERN NORTH TEXAS



EFFECTIVE THIS SUNDAY AFTERNOON AND EVENING FROM 230 PM UNTIL 900

PM CDT.



HAIL TO 3 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 55

STATUTE MILES NORTH AND SOUTH OF A LINE FROM 55 MILES WEST OF

ARDMORE OKLAHOMA TO 20 MILES NORTH NORTHEAST OF POTEAU OKLAHOMA.

FOR A COMPLETE DEPICTION OF THE WATCH SEE THE ASSOCIATED WATCH

OUTLINE UPDATE (WOUS64 KWNS WOU4).



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 192...WW 193...



DISCUSSION...ELEVATED STORM CLUSTERS/SUPERCELLS ALONG/N OF THE WARM

FRONT IN CENTRAL OK ARE EXPECTED TO ROOT INTO THE DEEPENING MOIST

AIR MASS ACROSS SOUTHERN OK THROUGH THE AFTERNOON.  AMPLE VERTICAL

SHEAR AND INSTABILITY EXIST FOR SUPERCELLS AND BOWS CAPABLE OF VERY

LARGE HAIL AND DMGG WIND GUSTS. ACTIVITY WILL MOVE ESE ACROSS SRN OK

AND N TX LATER THIS AFTERNOON.



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

TO 3 INCHES. EXTREME TURBULENCE AND SURFACE WIND GUSTS TO 60

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

MOTION VECTOR 24035.





...RACY

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