URGENT - IMMEDIATE BROADCAST REQUESTED
SEVERE THUNDERSTORM WATCH NUMBER 621
NWS STORM PREDICTION CENTER NORMAN OK
225 PM CDT TUE JUL 13 2004
THE NWS STORM PREDICTION CENTER HAS ISSUED A
SEVERE THUNDERSTORM WATCH FOR PORTIONS OF
SOUTHWEST IOWA
EASTERN NEBRASKA
EFFECTIVE THIS TUESDAY AFTERNOON AND EVENING FROM 225 PM UNTIL 800
PM 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 ALONG AND 50 STATUTE MILES
NORTH AND SOUTH OF A LINE FROM 45 MILES WEST OF COLUMBUS NEBRASKA
TO 35 MILES EAST OF OMAHA NEBRASKA.
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 619...WW 620...
DISCUSSION...ELEVATED THUNDERSTORMS DEVELOPING IN NERN NEB N OF
FRONTAL ZONE ACROSS SRN NEB. WITH AIR MASS SEWD FROM STORMS INTO
SWRN IA VERY UNSTABLE...STORMS EXPECTED TO BECOME SEVERE AS THEY
MOVE ESEWD. PRIMARY THREAT WILL BE LARGE HAIL...WITH WIND DAMAGE
POTENTIAL INCREASING AS THEY DEVELOP INTO SHORT LINES/BOWS.
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 29030.
With no MD out, it came as a surprise!