

000 

WWUS20 KWNS 260302

SEL1

SPC WW 260302

OKZ000-261000-



URGENT - IMMEDIATE BROADCAST REQUESTED

SEVERE THUNDERSTORM WATCH NUMBER 371

NWS STORM PREDICTION CENTER NORMAN OK

1000 PM CDT SUN MAY 25 2008



THE NWS STORM PREDICTION CENTER HAS ISSUED A

SEVERE THUNDERSTORM WATCH FOR PORTIONS OF



       WESTERN...CENTRAL AND NORTHERN OKLAHOMA



EFFECTIVE THIS SUNDAY NIGHT AND MONDAY MORNING FROM 1000 PM UNTIL

500 AM CDT.



HAIL TO 1 INCH 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 105

STATUTE MILES EAST AND WEST OF A LINE FROM 25 MILES NORTHWEST OF

PONCA CITY OKLAHOMA TO 35 MILES WEST SOUTHWEST OF OKLAHOMA CITY

OKLAHOMA.  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...CONTINUE...WW 362...WW 365...WW

366...WW 367...WW 368...WW 369...WW 370...



DISCUSSION...TSTM CLUSTERS IN THE ERN TX PANHANDLE AND IN NW OK

APPEAR TO HAVE DEVELOPED SUFFICIENTLY STRONG COLD POOLS TO SUPPORT

EWD PROPAGATION INTO VERY MOIST UNSTABLE AIR OVER NRN/CNTRL OK.  SRN

EXTENT OF ANY SUCH DEVELOPMENT SHOULD BE LIMITED BY INCREASING CINH.

 DEVELOPMENT COULD BE ENHANCED BY HIGH-LEVEL DIFFLUENCE CENTERED

OVER THE SRN PLNS.  MAIN SVR THREAT SHOULD BE LOCALLY DMGG WIND FROM

WET MICROBURSTS...AND POSSIBLY SVR HAIL.



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

TO 1 INCH. EXTREME TURBULENCE AND SURFACE WIND GUSTS TO 60 KNOTS.

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

VECTOR 26030.





...CORFIDI

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