Severe Thunderstorm Watch 338

URGENT - IMMEDIATE BROADCAST REQUESTED
SEVERE THUNDERSTORM WATCH NUMBER 338
NWS STORM PREDICTION CENTER NORMAN OK
220 PM MDT THU MAY 22 2008
THE NWS STORM PREDICTION CENTER HAS ISSUED A
SEVERE THUNDERSTORM WATCH FOR PORTIONS OF
PORTIONS OF WESTERN AND NORTHERN NEBRASKA
SOUTHEASTERN WYOMING
EFFECTIVE THIS THURSDAY AFTERNOON AND EVENING FROM 220 PM UNTIL
900 PM MDT.
HAIL TO 2 INCHES IN DIAMETER...THUNDERSTORM WIND GUSTS TO 60
MPH...AND DANGEROUS LIGHTNING ARE POSSIBLE IN THESE AREAS.
THE SEVERE THUNDERSTORM WATCH AREA IS APPROXIMATELY ALONG AND 55
STATUTE MILES NORTH AND SOUTH OF A LINE FROM 65 MILES WEST
NORTHWEST OF TORRINGTON WYOMING TO 30 MILES EAST OF MULLEN
NEBRASKA. FOR A COMPLETE DEPICTION OF THE WATCH SEE THE
ASSOCIATED WATCH OUTLINE UPDATE (WOUS64 KWNS WOU8).
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 334
...
WW 335
...
WW
336
...
WW 337
...
DISCUSSION...SUPERCELLS IN NERN CO AND NRN KS ARE EXPECTED TO TRACK
NWD INTO SERN WY AND NRN/WRN NEB INTO THE EVENING HOURS. THESE
STORMS WILL MOVE OVER A COOL AND STABLE BOUNDARY LAYER...BUT
MODERATE ELEVATED INSTABILITY AND STRONG FORCING...ASSOCIATED WITH
SHORTWAVE TROUGH APPROACHING FROM CO...WILL BE FAVORABLE FOR
SUPERCELLS WITH SEVERE HAIL.
AVIATION...A FEW SEVERE THUNDERSTORMS WITH HAIL SURFACE AND ALOFT
TO 2 INCHES. EXTREME TURBULENCE AND SURFACE WIND GUSTS TO 50
KNOTS. A FEW CUMULONIMBI WITH MAXIMUM TOPS TO 450. MEAN STORM
MOTION VECTOR 18035.
...IMY