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000 

WWUS20 KWNS 090452

SEL5

SPC WW 090452

ARZ000-LAZ000-OKZ000-TXZ000-091000-



URGENT - IMMEDIATE BROADCAST REQUESTED

SEVERE THUNDERSTORM WATCH NUMBER 175

NWS STORM PREDICTION CENTER NORMAN OK

1150 PM CDT TUE APR 8 2008



THE NWS STORM PREDICTION CENTER HAS ISSUED A

SEVERE THUNDERSTORM WATCH FOR PORTIONS OF



       SOUTHWEST ARKANSAS

       FAR NORTHWEST LOUISIANA

       FAR SOUTHEAST OKLAHOMA

       NORTH CENTRAL TEXAS



EFFECTIVE THIS TUESDAY NIGHT AND WEDNESDAY MORNING FROM 1150 PM

UNTIL 500 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 55

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

STEPHENVILLE TEXAS TO 25 MILES EAST SOUTHEAST OF TEXARKANA

ARKANSAS.  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.



DISCUSSION...STRONG/SEVERE THUNDERSTORMS WITH POTENTIAL FOR LARGE

HAIL WILL CONTINUE TO INCREASE ACROSS WW OVERNIGHT WITHIN AXIS OF

ASCENT NORTH OF SURFACE COLD FRONT. SEVERAL REPORTS OF .75-1 INCH

HAIL HAVE ALREADY OCCURRED.  EFFECTIVE SHEAR REMAINS SUPPORTIVE OF

SUPERCELLS AND FURTHER INCREASE THE POTENTIAL FOR LARGE HAIL WITH

THE STRONGER CORES.



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 24035.





...EVANS

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