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167 

WWUS20 KWNS 302317

SEL5

SPC WW 302317

OKZ000-TXZ000-310700-



URGENT - IMMEDIATE BROADCAST REQUESTED

SEVERE THUNDERSTORM WATCH NUMBER 325

NWS STORM PREDICTION CENTER NORMAN OK

615 PM CDT WED MAY 30 2012



THE NWS STORM PREDICTION CENTER HAS ISSUED A

SEVERE THUNDERSTORM WATCH FOR PORTIONS OF



       WESTERN AND CENTRAL OKLAHOMA

       A SMALL PART OF NORTH TEXAS



EFFECTIVE THIS WEDNESDAY NIGHT AND THURSDAY MORNING FROM 615 PM

UNTIL 200 AM CDT.



HAIL TO 2.5 INCHES IN DIAMETER...THUNDERSTORM WIND GUSTS TO 75

MPH...AND DANGEROUS LIGHTNING ARE POSSIBLE IN THESE AREAS.



THE SEVERE THUNDERSTORM WATCH AREA IS APPROXIMATELY ALONG AND 85

STATUTE MILES EAST AND WEST OF A LINE FROM 20 MILES NORTHEAST OF

ALVA OKLAHOMA TO 40 MILES SOUTH OF WICHITA FALLS TEXAS.  FOR A

COMPLETE DEPICTION OF THE WATCH SEE THE ASSOCIATED WATCH OUTLINE

UPDATE (WOUS64 KWNS WOU5).



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 321...WW 322...WW

323...WW 324...



DISCUSSION...TSTMS ARE STARTING TO FORM OVER W CNTRL AND SW OK.

CURRENT CHARACTER/MOVEMENT OF THIS ACTIVITY SUGGEST THAT STORMS ARE

ROOTED ABOVE THE BOUNDARY LAYER.  THE TSTMS MAY CONTINUE TO INCREASE

IN COVERAGE/STRENGTH AS FORCING FOR ASCENT INCREASES WITH CONTINUED

ESE MOTION OF UPR LVL IMPULSES...AND WITH NOCTURNAL INCREASE IN LLJ.

SETUP APPEARS AT LEAST CONDITIONALLY FAVORABLE FOR LOCALLY DMGG WIND

GUSTS / HEAT BURSTS...AND POSSIBLY SVR HAIL.  ADDITIONAL STORMS...OR

A COMPLEX OF STORMS...MAY MOVE SSE INTO NRN OK FROM KS LATER THIS

EVE...POSING A FURTHER THREAT FOR HIGH WIND...SVR HAIL ...AND

POSSIBLY ISOLD TORNADOES.



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

TO 2.5 INCHES. EXTREME TURBULENCE AND SURFACE WIND GUSTS TO 65

KNOTS. A FEW CUMULONIMBI WITH MAXIMUM TOPS TO 550. MEAN STORM

MOTION VECTOR 30025.





...CORFIDI

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