WATCHES: Tornado Watch Number 404

WWUS20 KWNS 172047
SEL4
SPC WW 172047
MNZ000-NDZ000-SDZ000-180300-

URGENT - IMMEDIATE BROADCAST REQUESTED
TORNADO WATCH NUMBER 404
NWS STORM PREDICTION CENTER NORMAN OK
345 PM CDT SUN JUN 17 2012

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

WESTERN MINNESOTA
SOUTHEAST NORTH DAKOTA
NORTHEAST SOUTH DAKOTA

EFFECTIVE THIS SUNDAY AFTERNOON AND EVENING FROM 345 PM UNTIL
1000 PM CDT.

TORNADOES...HAIL TO 3 INCHES IN DIAMETER...THUNDERSTORM WIND
GUSTS TO 80 MPH...AND DANGEROUS LIGHTNING ARE POSSIBLE IN THESE
AREAS.

THE TORNADO WATCH AREA IS APPROXIMATELY ALONG AND 75 STATUTE
MILES NORTH AND SOUTH OF A LINE FROM 35 MILES WEST OF ABERDEEN
SOUTH DAKOTA TO 45 MILES SOUTHEAST OF ALEXANDRIA MINNESOTA. FOR
A COMPLETE DEPICTION OF THE WATCH SEE THE ASSOCIATED WATCH
OUTLINE UPDATE (WOUS64 KWNS WOU4).

REMEMBER...A TORNADO WATCH MEANS CONDITIONS ARE FAVORABLE FOR
TORNADOES AND 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.

DISCUSSION...SCATTERED SUPERCELL THUNDERSTORMS ARE EXPECTED TO FORM
OVER NORTHEAST SD IN THE NEXT COUPLE OF HOURS...SPREADING EASTWARD
ACROSS THE WATCH AREA THROUGH THE EARLY EVENING. LOCAL VAD/PROFILER
OBSERVATIONS SUGGEST LOW LEVEL AND DEEP LAYER VERTICAL SHEAR ARE
FAVORABLE FOR ROTATING STORMS CAPABLE OF VERY LARGE HAIL AND A FEW
TORNADOES. STORMS MAY ORGANIZE INTO A BOW ECHO LATER THIS EVENING
WITH AN ENHANCED THREAT OF DAMAGING WINDS AS WELL.

AVIATION...TORNADOES AND A FEW SEVERE THUNDERSTORMS WITH HAIL
SURFACE AND ALOFT TO 3 INCHES. EXTREME TURBULENCE AND SURFACE
WIND GUSTS TO 70 KNOTS. A FEW CUMULONIMBI WITH MAXIMUM TOPS TO
500. MEAN STORM MOTION VECTOR 27035.


...HART

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