WATCHES: Severe Thunderstorm Watch Number 525

WWUS20 KWNS 271837
SEL5
SPC WW 271837
MNZ000-NDZ000-SDZ000-280200-

URGENT - IMMEDIATE BROADCAST REQUESTED
SEVERE THUNDERSTORM WATCH NUMBER 525
NWS STORM PREDICTION CENTER NORMAN OK
140 PM CDT SAT JUN 27 2009

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

WESTERN MINNESOTA
MUCH OF NORTH DAKOTA
NORTHERN SOUTH DAKOTA

EFFECTIVE THIS SATURDAY AFTERNOON AND EVENING FROM 140 PM UNTIL
900 PM 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 110
STATUTE MILES NORTH AND SOUTH OF A LINE FROM 10 MILES NORTH OF
DICKINSON NORTH DAKOTA TO 25 MILES NORTH OF DETROIT LAKES
MINNESOTA. 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.

DISCUSSION...CLUSTERS OF STRONG/SEVERE THUNDERSTORMS ARE INCREASING
IN COVERAGE ACROSS ND IN VICINITY OF UPPER VORT MAX. COOL
TEMPERATURES ALOFT AND STEEP LAPSE RATES WILL PROMOTE THE THREAT OF
HAIL IN STRONGER STORMS...ALONG WITH GUSTY/DAMAGING WINDS.

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 400. MEAN STORM
MOTION VECTOR 24035.

...HART

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