WATCHES: Severe Thunderstorm Watch Number 400

WWUS20 KWNS 161736
SEL0
SPC WW 161736
IAZ000-MOZ000-170000-

URGENT - IMMEDIATE BROADCAST REQUESTED
SEVERE THUNDERSTORM WATCH NUMBER 400
NWS STORM PREDICTION CENTER NORMAN OK
1235 PM CDT SAT JUN 16 2012

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

SOUTHERN IOWA
NORTHERN MISSOURI

EFFECTIVE THIS SATURDAY AFTERNOON AND EVENING FROM 1235 PM UNTIL
700 PM 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 60
STATUTE MILES EAST AND WEST OF A LINE FROM 40 MILES WEST
NORTHWEST OF KNOXVILLE IOWA TO 35 MILES SOUTH OF CHILLICOTHE
MISSOURI. FOR A COMPLETE DEPICTION OF THE WATCH SEE THE
ASSOCIATED WATCH OUTLINE UPDATE (WOUS64 KWNS WOU0).

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...THUNDERSTORMS ARE FORMING RAPIDLY AHEAD OF AN MCV OVER
NORTHWEST MO. THESE STORMS ARE EXPECTED TO TRACK RAPIDLY
EAST-NORTHEASTWARD ACROSS SOUTHERN IA AND NORTHERN MO THIS
AFTERNOON. AMPLE CAPE AND MESOSCALE ORGANIZATION OF MCV SUGGEST AND
INCREASING RISK OF HAIL AND DAMAGING WINDS IN THE STRONGER STORMS.

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 26030.


...HART

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