SPC Severe Thunderstorm Watch 390

WW 390 SEVERE TSTM KS NE 142015Z – 150400Z

URGENT - IMMEDIATE BROADCAST REQUESTED
SEVERE THUNDERSTORM WATCH NUMBER 390
NWS STORM PREDICTION CENTER NORMAN OK
315 PM CDT THU JUN 14 2012

THE NWS STORM PREDICTION CENTER HAS ISSUED A
SEVERE THUNDERSTORM WATCH FOR PORTIONS OF

       NORTHWEST AND NORTH-CENTRAL KANSAS
       SOUTH-CENTRAL AND SOUTHWEST NEBRASKA

EFFECTIVE THIS THURSDAY AFTERNOON AND EVENING FROM 315 PM UNTIL
1100 PM CDT.

HAIL TO 2.5 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 60
STATUTE MILES EAST AND WEST OF A LINE FROM 80 MILES SOUTHWEST OF
HILL CITY KANSAS TO 35 MILES NORTH NORTHEAST OF GRAND ISLAND
NEBRASKA.  FOR A COMPLETE DEPICTION OF THE WATCH SEE THE
ASSOCIATED WATCH OUTLINE UPDATE (WOUS64 KWNS WOU0).

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 389...

DISCUSSION...TSTMS ARE EXPECTED TO DEVELOP WITHIN THE NEXT HOUR OR
SO ALONG THE DECELERATING COLD FRONT WHERE AIR MASS HAS BECOME
MODERATE-STRONGLY UNSTABLE WITH MLCAPE OF 2000-4000+ J/KG.  DESPITE
THE MARGINAL VERTICAL SHEAR...THE DEGREE OF INSTABILITY WILL PROMOTE
INTENSE UPDRAFTS CAPABLE OF LARGE HAIL AND DAMAGING WIND GUSTS.

AVIATION...A FEW SEVERE THUNDERSTORMS WITH HAIL SURFACE AND ALOFT
TO 2.5 INCHES. EXTREME TURBULENCE AND SURFACE WIND GUSTS TO 60
KNOTS. A FEW CUMULONIMBI WITH MAXIMUM TOPS TO 550. MEAN STORM
MOTION VECTOR 27020.


...MEAD

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