

000 

WWUS20 KWNS 120201

SEL9

SPC WW 120201

OKZ000-TXZ000-120800-



URGENT - IMMEDIATE BROADCAST REQUESTED

SEVERE THUNDERSTORM WATCH NUMBER 49

NWS STORM PREDICTION CENTER NORMAN OK

800 PM CST MON FEB 11 2008



THE NWS STORM PREDICTION CENTER HAS ISSUED A

SEVERE THUNDERSTORM WATCH FOR PORTIONS OF



       SOUTH CENTRAL AND SOUTHEAST OKLAHOMA

       NORTH CENTRAL AND NORTHEAST TEXAS



EFFECTIVE THIS MONDAY NIGHT AND TUESDAY MORNING FROM 800 PM UNTIL

200 AM CST.



HAIL TO 1.5 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 70

STATUTE MILES NORTH AND SOUTH OF A LINE FROM 30 MILES NORTH

NORTHWEST OF MINERAL WELLS TEXAS TO 15 MILES SOUTHEAST OF POTEAU

OKLAHOMA.  FOR A COMPLETE DEPICTION OF THE WATCH SEE THE

ASSOCIATED WATCH OUTLINE UPDATE (WOUS64 KWNS WOU9).



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...THUNDERSTORMS ARE EXPECTED TO CONTINUE DEVELOPING IN

VICINITY OF AND NORTH OF A BAROCLINIC ZONE ACROSS SERN OK AND WRN AR

AND EVENTUALLY SPREAD SEWD INTO PARTS OF N CNTRL AND NERN TX. MOST

STORMS WILL LIKELY BECOME UNDERCUT BY THE FRONT. EFFECTIVE BULK

SHEAR OF 40 KT..STEEP MID LEVEL LAPSE RATES AND MODERATE INSTABILITY

WILL SUPPORT POTENTIAL FOR ELEVATED SUPERCELLS AND LINE SEGMENTS

WITH LARGE HAIL THE MAIN THREAT. ISOLATED DAMAGING WIND GUSTS WILL

ALSO BE POSSIBLE.



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

TO 1.5 INCHES. EXTREME TURBULENCE AND SURFACE WIND GUSTS TO 60

KNOTS. A FEW CUMULONIMBI WITH MAXIMUM TOPS TO 450. MEAN STORM

MOTION VECTOR 24040.





...DIAL/CORFIDI

