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URGENT - IMMEDIATE BROADCAST REQUESTED

TORNADO WATCH NUMBER 51

NWS STORM PREDICTION CENTER NORMAN OK

740 PM CDT MON APR 5 2010



THE NWS STORM PREDICTION CENTER HAS ISSUED A

TORNADO WATCH FOR PORTIONS OF



       PARTS OF SOUTHERN IOWA

       PARTS OF NORTHEAST KANSAS

       SMALL PART OF NORTHWEST MISSOURI

       SMALL PART OF SOUTHEAST NEBRASKA



EFFECTIVE THIS MONDAY NIGHT AND TUESDAY MORNING FROM 740 PM UNTIL

200 AM 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 50 STATUTE

MILES NORTH AND SOUTH OF A LINE FROM 15 MILES WEST NORTHWEST OF

CONCORDIA KANSAS TO 20 MILES SOUTH SOUTHEAST OF OTTUMWA 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...THIS TORNADO WATCH REPLACES SEVERE

THUNDERSTORM WATCH NUMBER 48. WATCH NUMBER 48 WILL NOT BE IN

EFFECT AFTER 740 PM CDT. CONTINUE...WW 50...



DISCUSSION...THUNDERSTORMS EXPECTED TO DEVELOP RAPIDLY VICINITY OF

WSW/ENE WARM FRONT ACROSS THE WATCH.  WITH STRONG VEERING SHEAR

PROFILES AND MDT INSTABILITY SUPERCELLS WILL DEVELOP.  PRIMARY

THREAT WILL  BE VERY LARGE HAIL...HOWEVER CONDITIONS FAVOR POSSIBLE

TORNADOES ASSOCIATED WITH ANY SUPERCELL FOR NEXT SEVERAL HOURS.



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

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