WATCHES: Severe Thunderstorm Watch Number 309

WWUS20 KWNS 131726
SEL9
SPC WW 131726
ILZ000-MOZ000-140000-

URGENT - IMMEDIATE BROADCAST REQUESTED
SEVERE THUNDERSTORM WATCH NUMBER 309
NWS STORM PREDICTION CENTER NORMAN OK
1225 PM CDT SUN JUN 13 2010

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

CENTRAL ILLINOIS
NORTHEAST MISSOURI

EFFECTIVE THIS SUNDAY AFTERNOON AND EVENING FROM 1225 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 90
STATUTE MILES EAST AND WEST OF A LINE FROM 15 MILES NORTH
NORTHWEST OF PEORIA ILLINOIS TO 40 MILES EAST SOUTHEAST OF VICHY
MISSOURI. FOR A COMPLETE DEPICTION OF THE WATCH SEE THE
ASSOCIATED WATCH OUTLINE UPDATE (WOUS64 KWNS WOU9).

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 LIKELY TO INCREASE IN BOTH COVERAGE
AND INTENSITY THROUGH THE AFTERNOON AS MID LEVEL DISTURBANCE OVER IA
AND ERN KS MOVES EAST AND ACTS ON VERY MOIST AND UNSTABLE AIRMASS IN
PLACE ACROSS MO AND IL. MID LEVEL WINDS 25-35KT WILL STRENGTHEN
GRADUALLY AS THE STORMS DEVELOP AND LEND SUPPORT FOR
QUASI-ORGANIZED/PERSISTENT STORM CLUSTERS NON UNLIKE SATURDAY ACROSS
PARTS OF THIS SAME AREA. PRIMARY HAZARDS FROM THESE STORMS WILL BE
DAMAGING DOWNBURST WINDS...ALONG WITH SOME SCATTERED HAIL...PERHAPS
1-2 INCHES IN DIAMETER.

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 550. MEAN STORM
MOTION VECTOR 25025.

...CARBIN

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