

574 

WWUS20 KWNS 110058

SEL1

SPC WW 110058

KSZ000-110500-



URGENT - IMMEDIATE BROADCAST REQUESTED

SEVERE THUNDERSTORM WATCH NUMBER 371

NWS STORM PREDICTION CENTER NORMAN OK

800 PM CDT SUN JUN 10 2012



THE NWS STORM PREDICTION CENTER HAS ISSUED A

SEVERE THUNDERSTORM WATCH FOR PORTIONS OF



       SOUTH CENTRAL KANSAS



EFFECTIVE THIS SUNDAY NIGHT FROM 800 PM UNTIL MIDNIGHT CDT.



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 55

STATUTE MILES EAST AND WEST OF A LINE FROM 35 MILES WEST

NORTHWEST OF EMPORIA KANSAS TO 45 MILES SOUTH OF WICHITA KANSAS.

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.



OTHER WATCH INFORMATION...CONTINUE...WW 369...WW 370...



DISCUSSION...CONVECTION IS INCREASING ALONG THE SURFACE COLD

FRONT...AND THIS TREND MAY CONTINUE FOR ANOTHER COUPLE OF HOURS AS

CONVERGENCE INCREASES ALONG THE BOUNDARY THIS EVENING.  MLCAPE IN

EXCESS OF 3000 J/KG...STEEP MIDLEVEL LAPSE RATES...AND EFFECTIVE

BULK SHEAR OF 25-30 KT WILL SUPPORT ORGANIZED MULTICELL CLUSTERS

/AND PERHAPS MARGINAL SUPERCELL STRUCTURES/ WITH AN ATTENDANT RISK

FOR LARGE HAIL/DAMAGING WINDS THE NEXT FEW HOURS.



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 550. MEAN STORM

MOTION VECTOR 27015.





...THOMPSON

