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WWUS20 KWNS 240008

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SPC WW 240008

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URGENT - IMMEDIATE BROADCAST REQUESTED

TORNADO WATCH NUMBER 84

NWS STORM PREDICTION CENTER NORMAN OK

710 PM CDT FRI APR 23 2010



THE NWS STORM PREDICTION CENTER HAS ISSUED A

TORNADO WATCH FOR PORTIONS OF



       WEST CENTRAL ILLINOIS

       NORTH CENTRAL AND NORTHEAST MISSOURI



EFFECTIVE THIS FRIDAY NIGHT FROM 710 PM UNTIL MIDNIGHT CDT.



TORNADOES...HAIL TO 1.5 INCHES IN DIAMETER...THUNDERSTORM WIND

GUSTS TO 60 MPH...AND DANGEROUS LIGHTNING ARE POSSIBLE IN THESE

AREAS.



THE TORNADO WATCH AREA IS APPROXIMATELY ALONG AND 45 STATUTE

MILES NORTH AND SOUTH OF A LINE FROM 45 MILES WEST SOUTHWEST OF

KIRKSVILLE MISSOURI TO 65 MILES EAST SOUTHEAST OF QUINCY

ILLINOIS.  FOR A COMPLETE DEPICTION OF THE WATCH SEE THE

ASSOCIATED WATCH OUTLINE UPDATE (WOUS64 KWNS WOU4).



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.



OTHER WATCH INFORMATION...CONTINUE...WW 80...WW 81...WW 82...WW

83...



DISCUSSION...SMALL AREA OF DESTABILIZATION NEAR SLOWLY-MOVING WARM

FRONT IN CNTRL MO/W CNTRL IL MAY SERVE AS SEAT OF STORM DEVELOPMENT

AND/OR AN AXIS FOR STRENGTHENING OF LOW LVL ROTATION IN STORMS

MOVING N TOWARD THE FRONT FROM CNTRL/SRN MO.  MOIST LOW LVLS AND

VEERING LOW LVL PROFILES SUGGEST POTENTIAL FOR TORNADOES IN ADDITION

TO HAIL.



AVIATION...TORNADOES AND A FEW SEVERE THUNDERSTORMS WITH HAIL

SURFACE AND ALOFT TO 1.5 INCHES. EXTREME TURBULENCE AND SURFACE

WIND GUSTS TO 50 KNOTS. A FEW CUMULONIMBI WITH MAXIMUM TOPS TO

450. MEAN STORM MOTION VECTOR 24030.





...CORFIDI

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