

000 

WWUS20 KWNS 312030

SEL3

SPC WW 312030

COZ000-KSZ000-OKZ000-TXZ000-010300-



URGENT - IMMEDIATE BROADCAST REQUESTED

TORNADO WATCH NUMBER 313

NWS STORM PREDICTION CENTER NORMAN OK

330 PM CDT THU MAY 31 2007



THE NWS STORM PREDICTION CENTER HAS ISSUED A

TORNADO WATCH FOR PORTIONS OF



       SOUTHEAST COLORADO

       SOUTHWEST KANSAS

       OKLAHOMA PANHANDLE

       TEXAS PANHANDLE



EFFECTIVE THIS THURSDAY AFTERNOON AND EVENING FROM 330 PM UNTIL

1000 PM CDT.



TORNADOES...HAIL TO 2 INCHES IN DIAMETER...THUNDERSTORM WIND

GUSTS TO 70 MPH...AND DANGEROUS LIGHTNING ARE POSSIBLE IN THESE

AREAS.



THE TORNADO WATCH AREA IS APPROXIMATELY ALONG AND 90 STATUTE

MILES NORTH AND SOUTH OF A LINE FROM 35 MILES WEST NORTHWEST OF

DALHART TEXAS TO 60 MILES EAST SOUTHEAST OF LIBERAL KANSAS.  FOR

A COMPLETE DEPICTION OF THE WATCH SEE THE ASSOCIATED WATCH

OUTLINE UPDATE (WOUS64 KWNS WOU3).



REMEMBER...A TORNADO WATCH MEANS CONDITIONS ARE FAVORABLE FOR

TORNADOES AND 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.



OTHER WATCH INFORMATION...CONTINUE...WW 312...



DISCUSSION...STRONG/SEVERE STORMS CONTINUE TO DEVELOP/INTENSITY

ALONG LEE TROUGH/DRYLINE OVER SERN CO INTO NERN NM.  AIR MASS IS

QUITE UNSTABLE SOUTH OF A BOUNDARY THAT EXTENDS FROM SERN CO ESEWD

ACROSS NRN OK WHERE MLCAPE IS 1000-2500 J/KG.  LOOKS LIKE THIS

ACTIVITY WILL MOVE INTO SWRN KS...INTO THE OK/TX PANHANDLES BEFORE

LOW LEVEL JET INCREASES THIS EVENING RESULTING IN MORE WIDESPREAD

ACTIVITY.  ANALYSIS ALSO SHOWS DEEP LAYER SHEAR OF 45-55 KT ACROSS

THIS REGION ALONG THE BOUNDARY FOR THE SUPPORT OF STRONG

UPDRAFTS/ROTATING STORMS.



AVIATION...TORNADOES AND 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 27030.





...MCCARTHY

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