Saturday, April 28, 2012

TORNADO WATCH FOR SOUTHERN ILLINOIS, SOUTHWEST INDIANA, NORTHERN KENTUCKY & EASTERN MISSOURI



URGENT - IMMEDIATE BROADCAST REQUESTED
TORNADO WATCH NUMBER 199 NWS STORM PREDICTION CENTER NORMAN OK
515 PM CDT SAT APR 28 2012

THE NWS STORM PREDICTION CENTER HAS ISSUED A
TORNADO WATCH FOR PORTIONS OF
  • SOUTHERN ILLINOIS
  • SOUTHWEST INDIANA
  • NORTHERN KENTUCKY
  • EASTERN MISSOURI
EFFECTIVE THIS SATURDAY AFTERNOON AND EVENING FROM 515 PM UNTIL 1000 PM CDT.

TORNADOES...HAIL TO 3 INCHES IN DIAMETER...THUNDERSTORM WIND

GUSTS TO 70 MPH...AND DANGEROUS LIGHTNING ARE POSSIBLE IN THESE AREAS.

THE TORNADO WATCH AREA IS APPROXIMATELY ALONG AND 30 STATUTE

MILES NORTH AND SOUTH OF A LINE FROM 30 MILES NORTHWEST OF
FARMINGTON MISSOURI TO 70 MILES EAST OF EVANSVILLE INDIANA. FOR
A COMPLETE DEPICTION OF THE WATCH SEE THE ASSOCIATED WATCH
OUTLINE UPDATE (WOUS64 KWNS WOU9).

REMEMBER...A TORNADO WATCH MEANS CONDITIONS ARE FAVORABLE FOR

TORNADOES AND 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.

DISCUSSION...SUPERCELLS EXPECTED TO CONTINUE FORMING ALONG AND N OF
NEARLY STNRY W-E FRONT FROM E CNTRL MO INTO SRN IL. 50 KT WLY DEEP
SHEAR...PRESENCE OF WEAK SFC WAVE/SLIGHTLY ENHANCED LOW LVL FLOW
NEAR STL...AND RELATIVELY SMALL TEMP-DEW POINT SPREADS SUGGEST
POTENTIAL FOR LOW LVL MESOCYLONES/ISOLD TORNADOES AS STORMS INTERACT
WITH FRONT AND/OR MORE SLOWLY-MOVING OUTFLOW BOUNDARIES FROM
EXISTING STORMS. OTHERWISE...VERY LARGE HAIL AND AREAS OF DMGG
OUTFLOW WINDS EXPECTED THROUGH MID EVE EWD INTO SW IND/N CNTRL KY.
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