SEL3
SPC WW 142127
NEZ000-SDZ000-150500-
URGENT - IMMEDIATE BROADCAST REQUESTED
SEVERE THUNDERSTORM WATCH NUMBER 703
NWS STORM PREDICTION CENTER NORMAN OK
330 PM MDT FRI AUG 14 2009
THE NWS STORM PREDICTION CENTER HAS ISSUED A
SEVERE THUNDERSTORM WATCH FOR PORTIONS OF
WESTERN NEBRASKA
CENTRAL SOUTH DAKOTA
EFFECTIVE THIS FRIDAY AFTERNOON AND EVENING FROM 330 PM UNTIL
1100 PM MDT.
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 50
STATUTE MILES EAST AND WEST OF A LINE FROM 35 MILES NORTH
NORTHEAST OF PIERRE SOUTH DAKOTA TO 15 MILES SOUTH SOUTHEAST OF
IMPERIAL NEBRASKA. FOR A COMPLETE DEPICTION OF THE WATCH SEE THE
ASSOCIATED WATCH OUTLINE UPDATE (WOUS64 KWNS WOU3).
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 702...
DISCUSSION...THUNDERSTORMS ARE INCREASING AHEAD OF A WEAK UPPER
TROUGH MOVING OVER THE CENTRAL ROCKIES. THESE STORMS WILL BECOME
MORE WIDESPREAD THROUGH THE EVENING...WITH VERTICAL SHEAR
STRENGTHENING IN REGION OF MODERATE CAPE. A FEW SEVERE STORMS WILL
BE POSSIBLE WITH DAMAGING WINDS AND HAIL POSSIBLE.
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 450. MEAN STORM
MOTION VECTOR 25025.
...HART
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