

190 

WWUS20 KWNS 262241

SEL3

SPC WW 262241

ILZ000-INZ000-270600-



URGENT - IMMEDIATE BROADCAST REQUESTED

SEVERE THUNDERSTORM WATCH NUMBER 443

NWS STORM PREDICTION CENTER NORMAN OK

640 PM EDT SAT JUL 26 2014



THE NWS STORM PREDICTION CENTER HAS ISSUED A



* SEVERE THUNDERSTORM WATCH FOR PORTIONS OF

  SOUTHEASTERN ILLINOIS

  CENTRAL AND SOUTHERN INDIANA



* EFFECTIVE THIS SATURDAY NIGHT AND SUNDAY MORNING FROM 640 PM

  UNTIL 200 AM EDT.



* PRIMARY THREATS INCLUDE...

  SCATTERED DAMAGING WINDS LIKELY WITH ISOLATED SIGNIFICANT GUSTS

    TO 75 MPH POSSIBLE

  ISOLATED VERY LARGE HAIL EVENTS TO 2 INCHES IN DIAMETER POSSIBLE

  A TORNADO OR TWO POSSIBLE



THE SEVERE THUNDERSTORM WATCH AREA IS APPROXIMATELY ALONG AND 90

STATUTE MILES EAST AND WEST OF A LINE FROM 75 MILES EAST

SOUTHEAST OF MOUNT VERNON ILLINOIS TO 40 MILES NORTH OF

INDIANAPOLIS INDIANA.  FOR A COMPLETE DEPICTION OF THE WATCH SEE

THE ASSOCIATED WATCH OUTLINE UPDATE (WOUS64 KWNS WOU3).



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.



&&



OTHER WATCH INFORMATION...CONTINUE...WW 442...



DISCUSSION...PREVIOUSLY ELEVATED CONVECTION AHEAD OF LONG-LIVED MCV

HAS BECOME SFC-BASED OVER SRN IL...AND SHOULD CONTINUE TO INTENSIFY

WHILE EXPANDING LATERALLY AND MOVING INTO FAVORABLY MOIST/UNSTABLE

AIR MASS INVOF OH VALLEY AND CENTRAL/SRN INDIANA.  NET RESULT WILL

BE SVR MCS WITH DAMAGING WIND BEING MAIN THREAT...SVR HAIL ALSO

POSSIBLE.  A TORNADO CANNOT BE RULED OUT EITHER FROM ANY EMBEDDED

SUPERCELL OR QLCS MESOVORTEX.



AVIATION...A FEW SEVERE THUNDERSTORMS WITH HAIL SURFACE AND ALOFT

TO 2 INCHES. EXTREME TURBULENCE AND SURFACE WIND GUSTS TO 65

KNOTS. A FEW CUMULONIMBI WITH MAXIMUM TOPS TO 600. MEAN STORM

MOTION VECTOR 28035.





...EDWARDS

