WW 317 SEVERE TSTM KS OK TX 292055Z – 300400Z
URGENT - IMMEDIATE BROADCAST REQUESTED
SEVERE THUNDERSTORM WATCH NUMBER 317
NWS STORM PREDICTION CENTER NORMAN OK
355 PM CDT TUE MAY 29 2012
THE NWS STORM PREDICTION CENTER HAS ISSUED A
SEVERE THUNDERSTORM WATCH FOR PORTIONS OF
FAR SOUTHWEST AND SOUTH CENTRAL KANSAS
WESTERN AND CENTRAL OKLAHOMA
A SMALL PART OF NORTHWEST TEXAS
EFFECTIVE THIS TUESDAY AFTERNOON AND EVENING FROM 355 PM UNTIL
1100 PM CDT.
HAIL TO 3 INCHES IN DIAMETER...THUNDERSTORM WIND GUSTS TO 80
MPH...AND DANGEROUS LIGHTNING ARE POSSIBLE IN THESE AREAS.
THE SEVERE THUNDERSTORM WATCH AREA IS APPROXIMATELY ALONG AND 85
STATUTE MILES EAST AND WEST OF A LINE FROM 25 MILES NORTHWEST OF
MEDICINE LODGE KANSAS TO 30 MILES WEST SOUTHWEST OF ARDMORE
OKLAHOMA. FOR A COMPLETE DEPICTION OF THE WATCH SEE THE
ASSOCIATED WATCH OUTLINE UPDATE (WOUS64 KWNS WOU7).
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.
OTHER WATCH INFORMATION...CONTINUE...WW 313...WW 314...WW
315...WW 316...
DISCUSSION...VISIBLE IMAGERY SHOWS CU/TCU FIELD DEVELOPING FROM SWRN
KS INTO NWRN OK...AND WITH CAP CONTINUING TO WEAKEN...DEEP
CONVECTION IS EXPECTED TO DEVELOP WITHIN THE NEXT 1-2 HRS ACROSS
PARTS OF SWRN KS AND WRN OK. STEEP LAPSE RATES AND WARM SURFACE
TEMPERATURES WITH INCREASING MOISTURE OVER OK ARE CONTRIBUTING TO
VERY UNSTABLE CONDITIONS WITH MLCAPE OF 2500-3500 J/KG. VEERING
WINDS WITH HEIGHT AND RESULTANT STRONG DIRECTIONAL SHEAR WILL
PROVIDE A FAVORABLE ENVIRONMENT FOR INITIAL SUPERCELL DEVELOPMENT
WITH STORMS CAPABLE OF PRODUCING VERY LARGE HAIL AND DAMAGING WINDS.
STORMS MAY GROW UPSCALE INTO A SEWD MOVING MCS LATER THIS EVENING
WITH AN INCREASING THREAT FOR MORE WIDESPREAD DAMAGING WINDS.
AVIATION...A FEW SEVERE THUNDERSTORMS WITH HAIL SURFACE AND ALOFT
TO 3 INCHES. EXTREME TURBULENCE AND SURFACE WIND GUSTS TO 70
KNOTS. A FEW CUMULONIMBI WITH MAXIMUM TOPS TO 550. MEAN STORM
MOTION VECTOR 29025.
...WEISS
via SPC Forecast Products http://www.spc.noaa.gov/products/watch/ww0317.html
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