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736 

WWUS20 KWNS 261748

SEL1

SPC WW 261748

IAZ000-MOZ000-NEZ000-270100-



URGENT - IMMEDIATE BROADCAST REQUESTED

TORNADO WATCH NUMBER 191

NWS STORM PREDICTION CENTER NORMAN OK

1250 PM CDT SUN APR 26 2009



THE NWS STORM PREDICTION CENTER HAS ISSUED A

TORNADO WATCH FOR PORTIONS OF



       PARTS OF WESTERN AND CENTRAL IOWA

       PARTS OF NORTHWEST MISSOURI

       PARTS OF SOUTHEAST NEBRASKA



EFFECTIVE THIS SUNDAY AFTERNOON AND EVENING FROM 1250 PM UNTIL

800 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 80 STATUTE

MILES EAST AND WEST OF A LINE FROM 15 MILES WEST OF FALLS CITY

NEBRASKA TO 20 MILES NORTHEAST OF FORT DODGE IOWA.  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.



OTHER WATCH INFORMATION...CONTINUE...WW 189...WW 190...



DISCUSSION...WARM FRONT MOVING NWD THRU WRN IA/SERN NE AHEAD OF

SURFACE WV NEAR CNK.  THIS PLACES WATCH AREA IN FAVORABLE

ENVIRONMENT FOR DEVELOPMENT OF TORNADIC SUPERCELLS AS SHEAR AND

INSTABILITY ARE QUITE STRONG IN WARM SECTOR.



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

SURFACE AND ALOFT TO 3 INCHES. EXTREME TURBULENCE AND SURFACE

WIND GUSTS TO 60 KNOTS. A FEW CUMULONIMBI WITH MAXIMUM TOPS TO

500. MEAN STORM MOTION VECTOR 24035.





...HALES

