Severe Thunderstorm Watch 226

URGENT - IMMEDIATE BROADCAST REQUESTED
SEVERE THUNDERSTORM WATCH NUMBER 226
NWS STORM PREDICTION CENTER NORMAN OK
605 PM CDT THU APR 24 2008
THE NWS STORM PREDICTION CENTER HAS ISSUED A
SEVERE THUNDERSTORM WATCH FOR PORTIONS OF
NORTHWEST KANSAS
SOUTHWEST NEBRASKA
EFFECTIVE THIS THURSDAY NIGHT AND FRIDAY MORNING FROM 605 PM
UNTIL 100 AM 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 70
STATUTE MILES NORTH AND SOUTH OF A LINE FROM 35 MILES SOUTHWEST
OF IMPERIAL NEBRASKA TO 60 MILES NORTH NORTHEAST OF HILL CITY
KANSAS. FOR A COMPLETE DEPICTION OF THE WATCH SEE THE ASSOCIATED
WATCH OUTLINE UPDATE (WOUS64 KWNS WOU6).
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...CONVECTION WILL INCREASE IN COVERAGE/INTENSITY THROUGH
THE EVENING AS A MID LEVEL TROUGH AND ASSOCIATED SURFACE LOW MOVE
EWD FROM CO TO KS/NEB. STEEP LAPSE RATES AND 0-6 KM BULK SHEAR IN
EXCESS OF 50 KT WILL SUPPORT ORGANIZED SEVERE STORMS...INCLUDING
SUPERCELLS...CAPABLE OF PRODUCING LARGE HAIL AND DAMAGING WINDS. AN
ISOLATED TORNADO CANNOT BE RULED OUT...BUT RELATIVELY WEAK LOW-LEVEL
SHEAR AND MODEST BOUNDARY LAYER MOISTURE SUGGEST THIS THREAT IS
LIMITED THROUGH MUCH OF THE EVENING.
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 500. MEAN STORM
MOTION VECTOR 26020.
...THOMPSON