WATCHES: Severe Thunderstorm Watch Number 401

WWUS20 KWNS 161944
SEL1
SPC WW 161944
IAZ000-ILZ000-MOZ000-170200-

URGENT - IMMEDIATE BROADCAST REQUESTED
SEVERE THUNDERSTORM WATCH NUMBER 401
NWS STORM PREDICTION CENTER NORMAN OK
245 PM CDT SAT JUN 16 2012

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

SOUTHEAST IOWA
NORTHWEST ILLINOIS
NORTHEAST MISSOURI

EFFECTIVE THIS SATURDAY AFTERNOON AND EVENING FROM 245 PM UNTIL
900 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 75
STATUTE MILES NORTH AND SOUTH OF A LINE FROM 30 MILES NORTH OF
KIRKSVILLE MISSOURI TO 65 MILES NORTH NORTHEAST OF PEORIA
ILLINOIS. FOR A COMPLETE DEPICTION OF THE WATCH SEE THE
ASSOCIATED WATCH OUTLINE UPDATE (WOUS64 KWNS WOU1).

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 400...

DISCUSSION...A CLUSTER OF INTENSE STORMS IS ONGOING OVER SOUTHEAST
IA...WHILE STORMS ASSOCIATED WITH AN APPROACHING MCV ARE INCREASING
ACROSS MO. ALL OF THIS ACTIVITY WILL SPREAD EASTWARD ACROSS THE
WATCH AREA THIS AFTERNOON AND EARLY EVENING. FAVORABLE WESTERLY
FLOW THROUGH THE MID TROPOSPHERE COUPLED WITH HIGH CAPE VALUES WILL
PROMOTE STRONG DOWNBURST WINDS IN THE STRONGER STORMS. LARGE HAIL
IS ALSO POSSIBLE.

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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