

066 

WWUS20 KWNS 071823

SEL1

SPC WW 071823

ILZ000-INZ000-KYZ000-MOZ000-080000-



URGENT - IMMEDIATE BROADCAST REQUESTED

TORNADO WATCH NUMBER 61

NWS STORM PREDICTION CENTER NORMAN OK

125 PM CDT WED APR 7 2010



THE NWS STORM PREDICTION CENTER HAS ISSUED A

TORNADO WATCH FOR PORTIONS OF



       CENTRAL AND SOUTHERN ILLINOIS

       WESTERN AND NORTHERN INDIANA

       WESTERN KENTUCKY

       SOUTHEAST MISSOURI



EFFECTIVE THIS WEDNESDAY AFTERNOON AND EVENING FROM 125 PM UNTIL

700 PM CDT.



TORNADOES...HAIL TO 2 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 75 STATUTE

MILES EAST AND WEST OF A LINE FROM 45 MILES NORTH NORTHWEST OF

LAFAYETTE INDIANA TO 25 MILES EAST SOUTHEAST OF POPLAR BLUFF

MISSOURI.  FOR A COMPLETE DEPICTION OF THE WATCH SEE THE

ASSOCIATED WATCH OUTLINE UPDATE (WOUS64 KWNS WOU1).



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...THUNDERSTORMS ARE INCREASING ALONG A SURFACE COLD FRONT

OVER PORTIONS OF CENTRAL IL AND EASTERN MO.  THESE STORMS ARE

EXPECTED TO TRACK EASTWARD THIS AFTERNOON INTO PARTS OF WESTERN IND

AND WESTERN KY.  BREAKS IN THE CLOUDS AND RETURNING LOW LEVEL

MOISTURE WILL PROVIDE SUFFICIENT INSTABILITY FOR A FEW SEVERE

STORMS...WHILE FAVORABLE VERTICAL SHEAR PROFILES PROMOTE

SUPERCELL/BOW STRUCTURES IN STORMS.  LARGE HAIL IS THE MAIN

THREAT...ALTHOUGH ISOLATED TORNADOES ARE ALSO POSSIBLE.



AVIATION...TORNADOES AND 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

450. MEAN STORM MOTION VECTOR 25030.





...HART

