WATCHES: Severe Thunderstorm Watch Number 290

WWUS20 KWNS 091909
SEL0
SPC WW 091909
ILZ000-INZ000-KYZ000-MOZ000-100200-

URGENT - IMMEDIATE BROADCAST REQUESTED
SEVERE THUNDERSTORM WATCH NUMBER 290
NWS STORM PREDICTION CENTER NORMAN OK
205 PM CDT SUN JUN 9 2013

THE NWS STORM PREDICTION CENTER HAS ISSUED A

* SEVERE THUNDERSTORM WATCH FOR PORTIONS OF
CENTRAL AND SOUTHERN ILLINOIS
SOUTHWEST INDIANA
WESTERN KENTUCKY
SOUTHEAST MISSOURI

* EFFECTIVE THIS SUNDAY AFTERNOON AND EVENING FROM 205 PM UNTIL
900 PM CDT.

* PRIMARY THREATS INCLUDE...
SEVERAL DAMAGING WIND GUSTS TO 70 MPH POSSIBLE
SEVERAL LARGE HAIL EVENTS TO 1 INCH IN DIAMETER POSSIBLE

THE SEVERE THUNDERSTORM WATCH AREA IS APPROXIMATELY ALONG AND 70
STATUTE MILES EAST AND WEST OF A LINE FROM 35 MILES NORTH
NORTHWEST OF CHAMPAIGN ILLINOIS TO 40 MILES SOUTH SOUTHWEST OF
PADUCAH KENTUCKY. FOR A COMPLETE DEPICTION OF THE WATCH SEE THE
ASSOCIATED WATCH OUTLINE UPDATE (WOUS64 KWNS WOU0).

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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...TSTMS FORMING ALONG LOW-LVL CONFLUENCE AXIS ATTM
EXTENDING NNE FROM NEAR THE MO BOOTHEEL TO JUST E OF STL TO JUST W
OF SPRINGFIELD IL EXPECTED INTENSIFY AS THEY MOVE/DEVELOP NNE INTO
MORE STRONGLY-HEATED...MOISTENING ENVIRONMENT. MODERATE/LARGELY
UNIDIRECTIONAL SWLY DEEP SHEAR...AND FORCING FOR ASCENT ASSOCIATED
WITH VORT LOBE MOVING E AROUND BASE OF IA/MO UPR LOW...SUGGEST
STORMS WILL EVOLVE INTO ONE OR MORE BANDS...WITH EMBEDDED LEWPS/BOWS
POSING A RISK FOR LOCALLY DMGG WIND...MARGINALLY SVR HAIL...AND
PERHAPS A TORNADO.

AVIATION...A FEW SEVERE THUNDERSTORMS WITH HAIL SURFACE AND ALOFT
TO 1 INCH. EXTREME TURBULENCE AND SURFACE WIND GUSTS TO 60 KNOTS.
A FEW CUMULONIMBI WITH MAXIMUM TOPS TO 500. MEAN STORM MOTION
VECTOR 22030.


...CORFIDI

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