WATCHES: Severe Thunderstorm Watch Number 704

WWUS20 KWNS 142238
SEL4
SPC WW 142238
MNZ000-NDZ000-SDZ000-150600-

URGENT - IMMEDIATE BROADCAST REQUESTED
SEVERE THUNDERSTORM WATCH NUMBER 704
NWS STORM PREDICTION CENTER NORMAN OK
540 PM CDT FRI AUG 14 2009

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

WEST CENTRAL MINNESOTA
SOUTHEAST NORTH DAKOTA
NORTHEAST SOUTH DAKOTA

EFFECTIVE THIS FRIDAY AFTERNOON AND SATURDAY MORNING FROM 540 PM
UNTIL 100 AM 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 APPROXIMATELY ALONG AND 65
STATUTE MILES EAST AND WEST OF A LINE FROM 55 MILES NORTH
NORTHWEST OF FARGO NORTH DAKOTA TO 15 MILES SOUTH OF ABERDEEN
SOUTH DAKOTA. FOR A COMPLETE DEPICTION OF THE WATCH SEE THE
ASSOCIATED WATCH OUTLINE UPDATE (WOUS64 KWNS WOU4).

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...WW 703...

DISCUSSION...A CLUSTER OF INTENSE THUNDERSTORMS WILL TRACK FROM
NORTHEAST SD/SOUTHEAST ND INTO WESTERN MN DURING THE NEXT SEVERAL
HOURS AS A SURFACE COLD FRONT SAGS SOUTHWARD INTO REGION. THESE
STORMS ARE IN A REGION OF VERY UNSTABLE CAPE VALUES AND SUFFICIENT
DEEP LAYER SHEAR FOR ORGANIZED/SEVERE STORMS CAPABLE OF DAMAGING
WINDS AND HAIL.

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 500. MEAN STORM
MOTION VECTOR 24025.

...HART

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