WATCHES: Severe Thunderstorm Watch Number 755

WWUS20 KWNS 270204
SEL5
SPC WW 270204
NEZ000-SDZ000-WYZ000-270900-

URGENT - IMMEDIATE BROADCAST REQUESTED
SEVERE THUNDERSTORM WATCH NUMBER 755
NWS STORM PREDICTION CENTER NORMAN OK
805 PM MDT SAT JUL 26 2008

THE NWS STORM PREDICTION CENTER HAS ISSUED A
SEVERE THUNDERSTORM WATCH FOR PORTIONS OF

NEBRASKA PANHANDLE
WESTERN AND CENTRAL SOUTH DAKOTA
EXTREME SOUTHEAST WYOMING

EFFECTIVE THIS SATURDAY NIGHT AND SUNDAY MORNING FROM 805 PM
UNTIL 300 AM MDT.

HAIL TO 2 INCHES IN DIAMETER...THUNDERSTORM WIND GUSTS TO 80
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 40 MILES NORTHWEST OF
MOBRIDGE SOUTH DAKOTA TO 30 MILES SOUTH SOUTHWEST OF ALLIANCE
NEBRASKA. FOR A COMPLETE DEPICTION OF THE WATCH SEE THE
ASSOCIATED WATCH OUTLINE UPDATE (WOUS64 KWNS WOU5).

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 753...WW 754...

DISCUSSION...AREAS OF HIGH-BASED CONVECTION NOW DEVELOPING EAST INTO
ZONE OF MUCH STRONGER INSTABILITY AND A PERIOD OF SUSTAINED ASCENT
AND MASS INFLOW ON STRENGTHENING SLY LOW LEVEL JET. ACTIVITY APPEARS
TO BE ENCOUNTERING MORE FAVORABLE REGIME BASED ON LATEST RADAR
TRENDS AND EXPECT ONE OR TWO CLUSTERS TO CONTINUE TO POSE A THREAT
OF HIGH WINDS AND LARGE HAIL WHILE SPREADING SEWD INTO LLJ...AND
ALONG INSTABILITY AXIS THROUGH LATE TONIGHT.

AVIATION...A FEW SEVERE THUNDERSTORMS WITH HAIL SURFACE AND ALOFT
TO 2 INCHES. EXTREME TURBULENCE AND SURFACE WIND GUSTS TO 70
KNOTS. A FEW CUMULONIMBI WITH MAXIMUM TOPS TO 500. MEAN STORM
MOTION VECTOR 28035.

...CARBIN

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