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376 

WWUS20 KWNS 260306

SEL9

SPC WW 260306

IAZ000-ILZ000-MOZ000-WIZ000-261100-



URGENT - IMMEDIATE BROADCAST REQUESTED

TORNADO WATCH NUMBER 719

NWS STORM PREDICTION CENTER NORMAN OK

1005 PM CDT MON OCT 25 2010



THE NWS STORM PREDICTION CENTER HAS ISSUED A

TORNADO WATCH FOR PORTIONS OF



       EASTERN IOWA

       WESTERN ILLINOIS

       MUCH OF MISSOURI

       SOUTHWEST WISCONSIN



EFFECTIVE THIS MONDAY NIGHT AND TUESDAY MORNING FROM 1005 PM

UNTIL 600 AM CDT.



TORNADOES...HAIL TO 1 INCH IN DIAMETER...THUNDERSTORM WIND GUSTS

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



THE TORNADO WATCH AREA IS APPROXIMATELY ALONG AND 100 STATUTE

MILES EAST AND WEST OF A LINE FROM 30 MILES NORTHWEST OF LONEROCK

WISCONSIN TO 50 MILES WEST SOUTHWEST OF WEST PLAINS MISSOURI.

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...THUNDERSTORM DEVELOPMENT IS EXPECTED IN THE NEXT 1-2

HOURS AS A COLD FRONT SURGES EWD FROM KS INTO MO...IN ASSOCIATION

WITH A RAPIDLY DEEPENING LOW OVER WRN IA AND A 100+ KT JET STREAK

ALOFT.  INTENSE FORCING FOR ASCENT ALONG THE FRONT SHOULD PROMOTE

SQUALL LINE FORMATION WITH AN ATTENDANT RISK FOR INCREASINGLY

WIDESPREAD WIND DAMAGE OVERNIGHT AS THE LOW-LEVELS

MOISTEN/DESTABILIZE.  OTHER MORE SCATTERED STORMS WILL ALSO BE

POSSIBLE IN THE WARM ADVECTION ZONE FROM NE MO NEWD TOWARD SW WI.

EMBEDDED BOWS AND SUPERCELLS WILL ALSO BE CAPABLE OF PRODUCING A FEW

TORNADOES GIVEN THE VERY STRONG LOW-LEVEL SHEAR...AND DESPITE THE

RELATIVELY WEAK INSTABILITY.



AVIATION...TORNADOES AND 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 450.

MEAN STORM MOTION VECTOR 26040.





...THOMPSON

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