SEL7
SPC WW 160104
NEZ000-SDZ000-160600-
URGENT - IMMEDIATE BROADCAST REQUESTED
SEVERE THUNDERSTORM WATCH NUMBER 707
NWS STORM PREDICTION CENTER NORMAN OK
805 PM CDT SAT AUG 15 2009
THE NWS STORM PREDICTION CENTER HAS ISSUED A
SEVERE THUNDERSTORM WATCH FOR PORTIONS OF
CENTRAL NEBRASKA
CENTRAL SOUTH DAKOTA
EFFECTIVE THIS SATURDAY NIGHT AND SUNDAY MORNING FROM 805 PM
UNTIL 100 AM CDT.
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 80
STATUTE MILES EAST AND WEST OF A LINE FROM 45 MILES EAST
NORTHEAST OF PIERRE SOUTH DAKOTA TO 30 MILES EAST OF NORTH PLATTE
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.
OTHER WATCH INFORMATION...CONTINUE...WW 706...
DISCUSSION...BOWING LINE OF INTENSE THUNDERSTORMS OVER WESTERN NEB
AND WESTERN SD WILL TRACK EAST-NORTHEASTWARD FOR SEVERAL MORE HOURS
ACROSS THE WATCH AREA. STRONG WINDS ALOFT AND SUFFICIENT VERTICAL
SHEAR SUGGEST A CONTINUED THREAT OF LOCALLY DAMAGING WINDS AND HAIL
ALONG THE LEADING EDGE OF THE STORMS.
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 500. MEAN STORM
MOTION VECTOR 25035.
...HART
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