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URGENT - IMMEDIATE BROADCAST REQUESTED

SEVERE THUNDERSTORM WATCH NUMBER 941

NWS STORM PREDICTION CENTER NORMAN OK

940 PM CST MON DEC 8 2008



THE NWS STORM PREDICTION CENTER HAS ISSUED A

SEVERE THUNDERSTORM WATCH FOR PORTIONS OF



       NORTH CENTRAL AND NORTHEAST TEXAS



EFFECTIVE THIS MONDAY NIGHT AND TUESDAY MORNING FROM 940 PM UNTIL

300 AM CST.



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 80

STATUTE MILES EAST AND WEST OF A LINE FROM 15 MILES SOUTHEAST OF

WACO TEXAS TO 30 MILES NORTHWEST OF PARIS TEXAS.  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.



DISCUSSION...INTENSE MID/UPPER LEVEL SYSTEM IS SUPPORTING

DEVELOPMENT OF BROKEN LINE OF THUNDERSTORMS OVER N-CENTRAL TX LATE

THIS EVENING.  ALTHOUGH AIR MASS REMAINS CAPPED TO MOISTENING

SURFACE PARCELS...VERY STEEP LAPSE RATES AND DEEP ASCENT WILL

SUSTAIN RISK OF LARGE HAIL AND ISOLATED STRONG/DAMAGING WIND GUSTS

AS THIS ACTIVITY MOVES RAPIDLY EWD TONIGHT.  SHEAR IS QUITE STRONG

AND WILL SUPPORT SUPERCELLS...FURTHER ENHANCING THE THREAT OF

SEVERE.  SHOULD ACTIVITY SHOW SIGNS OF ROOTING INTO THE BOUNDARY

LAYER...UPGRADE TO TORNADO WATCH MAY BE NEEDED LATER TONIGHT OVER

NERN TX.



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 400. MEAN STORM

MOTION VECTOR 26040.





...EVANS

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