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000 

WWUS20 KWNS 170830

SEL3

SPC WW 170830

OKZ000-TXZ000-171600-



URGENT - IMMEDIATE BROADCAST REQUESTED

SEVERE THUNDERSTORM WATCH NUMBER 123

NWS STORM PREDICTION CENTER NORMAN OK

325 AM CDT MON MAR 17 2008



THE NWS STORM PREDICTION CENTER HAS ISSUED A

SEVERE THUNDERSTORM WATCH FOR PORTIONS OF



       WESTERN AND CENTRAL OKLAHOMA

       NORTHWEST TEXAS



EFFECTIVE THIS MONDAY MORNING FROM 325 AM UNTIL 1100 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 85

STATUTE MILES EAST AND WEST OF A LINE FROM 10 MILES NORTH OF ALVA

OKLAHOMA TO 50 MILES SOUTH OF WICHITA FALLS TEXAS.  FOR A

COMPLETE DEPICTION OF THE WATCH SEE THE ASSOCIATED WATCH OUTLINE

UPDATE (WOUS64 KWNS WOU3).



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 122...



DISCUSSION...EVOLVING SQUALL LINE WILL SPREAD ACROSS WESTERN

OKLAHOMA AND PARTS OF NORTHWEST TEXAS...TOWARD THE INTERSTATE 35

CORRIDOR THROUGH MID MORNING.  THIS LIKELY WILL BE ACCOMPANIED BY

THE RISK FOR LARGE HAIL AS ENVIRONMENT BECOMES MODERATELY UNSTABLE.

AND...POTENTIAL FOR DAMAGING WINDS WILL INCREASE AS

WELL...PARTICULARLY IN CLOSER PROXIMITY TO WARM FRONT...ACROSS

NORTHWEST TEXAS THROUGH SOUTHWEST/ CENTRAL OKLAHOMA...AS 50-70 KT

SOUTHERLY LOW-LEVEL JET CORE SHIFTS NORTHWARD INTO THE INTERSTATE 35

CORRIDOR OF OKLAHOMA BY 15-16Z.



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 450. MEAN STORM

MOTION VECTOR 24050.





...KERR/CARBIN

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