Severe Thunderstorm Watch 287

URGENT - IMMEDIATE BROADCAST REQUESTED
SEVERE THUNDERSTORM WATCH NUMBER 287
NWS STORM PREDICTION CENTER NORMAN OK
1230 PM MDT FRI MAY 9 2008
THE NWS STORM PREDICTION CENTER HAS ISSUED A
SEVERE THUNDERSTORM WATCH FOR PORTIONS OF
NEBRASKA PANHANDLE
EXTREME SOUTHWEST SOUTH DAKOTA
EASTERN WYOMING
EFFECTIVE THIS FRIDAY AFTERNOON AND EVENING FROM 1230 PM UNTIL
900 PM MDT.
HAIL TO 1.5 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 75
STATUTE MILES EAST AND WEST OF A LINE FROM 110 MILES NORTH OF
DOUGLAS WYOMING TO 10 MILES SOUTHWEST OF SIDNEY NEBRASKA. 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.
DISCUSSION...STRONG SHRTWV TROUGH DVLPG EAST ACRS ROCKIES ATTM WILL
AID STORM INITIATION AND MAINTENENCE ACROSS AREA THROUGH LATE TODAY.
LIMITED MOISTURE AND WEAK CONVECTIVE INSTABILITY WILL BE SOMEWHAT
COUNTERED BY STEEPENING MID LEVEL LAPSE RATES...FORCING...AND SHEAR
AS THE MID LEVEL DISTURBANCE SPREADS EAST. GENERALLY HIGH-BASED
ORGANIZED STORMS/SUPERCELLS ARE ANTICIPATED WITH ATTENDANT THREATS
OF POTENTIALLY DAMAGING HAIL AND HIGH WINDS.
AVIATION...A FEW SEVERE THUNDERSTORMS WITH HAIL SURFACE AND ALOFT
TO 1.5 INCHES. EXTREME TURBULENCE AND SURFACE WIND GUSTS TO 60
KNOTS. A FEW CUMULONIMBI WITH MAXIMUM TOPS TO 350. MEAN STORM
MOTION VECTOR 28025.
...CARBIN