WATCHES: Tornado Watch Number 415

WWUS20 KWNS 261752
SEL5
SPC WW 261752
IAZ000-MNZ000-SDZ000-270100-

URGENT - IMMEDIATE BROADCAST REQUESTED
TORNADO WATCH NUMBER 415
NWS STORM PREDICTION CENTER NORMAN OK
1250 PM CDT SAT JUN 26 2010

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

NORTHWESTERN IOWA
SOUTHWESTERN MINNESOTA
SOUTHEASTERN SOUTH DAKOTA

EFFECTIVE THIS SATURDAY AFTERNOON AND EVENING FROM 1250 PM UNTIL
800 PM CDT.

TORNADOES...HAIL TO 4 INCHES IN DIAMETER...THUNDERSTORM WIND
GUSTS TO 90 MPH...AND DANGEROUS LIGHTNING ARE POSSIBLE IN THESE
AREAS.

THE TORNADO WATCH AREA IS APPROXIMATELY ALONG AND 70 STATUTE
MILES NORTH AND SOUTH OF A LINE FROM 15 MILES NORTHWEST OF
MITCHELL SOUTH DAKOTA TO 45 MILES EAST SOUTHEAST OF MANKATO
MINNESOTA. FOR A COMPLETE DEPICTION OF THE WATCH SEE THE
ASSOCIATED WATCH OUTLINE UPDATE (WOUS64 KWNS WOU5).

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...ELEVATED SUPERCELL WAS LOCATED IN SERN SD EAST OF
HURON. THIS STORM IS EXPECTED TO CONTINUE TRACKING EWD ALONG E-W
ORIENTED WARM FRONT AND EVENTUALLY BECOME SURFACE BASED. ONCE THIS
STORM IS ABLE TO TAP INTO THE BOUNDARY LAYER...ENVIRONMENTAL
CONDITIONS WILL BE VERY FAVORABLE FOR THIS STORM TO PRODUCE VERY
LARGE HAIL ...DAMAGING WINDS AS WELL AS TORNADOES. LATER THIS
AFTERNOON...OTHER SUPERCELLS ARE EXPECTED TO DEVELOP NEAR THE WARM
FRONT AND EAST OF SURFACE LOW IN SERN SD...WITH VERY LARGE
HAIL...WIND DAMAGE AND A FEW TORNADOES ALSO LIKELY.

AVIATION...TORNADOES AND A FEW SEVERE THUNDERSTORMS WITH HAIL
SURFACE AND ALOFT TO 4 INCHES. EXTREME TURBULENCE AND SURFACE
WIND GUSTS TO 80 KNOTS. A FEW CUMULONIMBI WITH MAXIMUM TOPS TO
600. MEAN STORM MOTION VECTOR 28020.

...IMY

+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-
To unsubscribe from WX-STORM send e-mail to LISTSERV@LISTSERV.ILLINOIS.EDU with
"unsub wx-storm" in the body of your message. For more information write cnovy@cox.net.