

000 

WWUS20 KWNS 270608

SEL7

SPC WW 270608

OKZ000-271100-



URGENT - IMMEDIATE BROADCAST REQUESTED

SEVERE THUNDERSTORM WATCH NUMBER 377

NWS STORM PREDICTION CENTER NORMAN OK

110 AM CDT TUE MAY 27 2008



THE NWS STORM PREDICTION CENTER HAS ISSUED A

SEVERE THUNDERSTORM WATCH FOR PORTIONS OF



       CENTRAL OKLAHOMA



EFFECTIVE THIS TUESDAY MORNING FROM 110 AM UNTIL 600 AM CDT.



HAIL TO 2 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 35

STATUTE MILES NORTH AND SOUTH OF A LINE FROM 40 MILES WEST OF

CHICKASHA OKLAHOMA TO 20 MILES SOUTH SOUTHEAST OF CHANDLER

OKLAHOMA.  FOR A COMPLETE DEPICTION OF THE WATCH SEE THE

ASSOCIATED WATCH OUTLINE UPDATE (WOUS64 KWNS WOU7).



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...SMALL CLUSTER OF INTENSE THUNDERSTORMS OVER WEST

CENTRAL OK APPEAR TO BE INCREASING IN ORGANIZATION.  THESE STORMS

WILL REMAIN IN A VERY UNSTABLE AIRMASS FOR THE NEXT FEW HOURS WITH

DEWPOINTS IN THE 70S AND MUCAPE VALUES OF 2500-3500 J/KG.

THEREFORE...STORMS ARE EXPECTED TO MAINTAIN A RISK OF LARGE HAIL AND

DAMAGING WINDS FOR A FEW MORE HOURS.



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

TO 2 INCHES. EXTREME TURBULENCE AND SURFACE WIND GUSTS TO 60

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

MOTION VECTOR 27030.





...HART

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