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URGENT - IMMEDIATE BROADCAST REQUESTED

SEVERE THUNDERSTORM WATCH NUMBER 28

NWS STORM PREDICTION CENTER NORMAN OK

1140 PM CST SAT FEB 9 2013



THE NWS STORM PREDICTION CENTER HAS ISSUED A

SEVERE THUNDERSTORM WATCH FOR PORTIONS OF



       PARTS OF WEST CENTRAL AND NORTH CENTRAL TEXAS



EFFECTIVE THIS SATURDAY NIGHT AND SUNDAY MORNING FROM 1140 PM

UNTIL 700 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 105

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

NORTHWEST OF SHERMAN TEXAS TO 60 MILES SOUTH SOUTHEAST OF

BROWNWOOD TEXAS.  FOR A COMPLETE DEPICTION OF THE WATCH SEE THE

ASSOCIATED WATCH OUTLINE UPDATE (WOUS64 KWNS WOU8).



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...THUNDERSTORM ACTIVITY DEVELOPING ALONG AND AHEAD OF A

COLD ADVANCING EASTWARD INTO AND THROUGH WEST CENTRAL AND NORTH

TEXAS IS EXPECTED TO CONTINUE TO INCREASE IN COVERAGE AND INTENSIFY

OVERNIGHT...AS MID-LEVEL COOLING AND LOW-LEVEL MOISTENING CONTRIBUTE

TO FURTHER DESTABILIZATION.  IN THE PRESENCE OF 40-50 KT

SOUTHWESTERLY DEEP LAYER MEAN FLOW AND STRONG SHEAR...AN

INCREASINGLY ORGANIZED STORM CLUSTER COULD EVOLVE...WITH A RISK FOR

STRONG SURFACE GUSTS...IN ADDITION TO LARGE HAIL.



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 24040.





...KERR

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