

746 

WWUS20 KWNS 221906

SEL3

SPC WW 221906

IAZ000-KSZ000-MOZ000-NEZ000-230200-



URGENT - IMMEDIATE BROADCAST REQUESTED

TORNADO WATCH NUMBER 53

NWS STORM PREDICTION CENTER NORMAN OK

205 PM CDT TUE MAR 22 2011



THE NWS STORM PREDICTION CENTER HAS ISSUED A

TORNADO WATCH FOR PORTIONS OF



       WESTERN AND SOUTHERN IOWA

       EASTERN KANSAS

       WESTERN MISSOURI

       EASTERN NEBRASKA



EFFECTIVE THIS TUESDAY AFTERNOON AND EVENING FROM 205 PM UNTIL

900 PM CDT.



TORNADOES...HAIL TO 2.5 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 90 STATUTE

MILES EAST AND WEST OF A LINE FROM 5 MILES EAST NORTHEAST OF

STORM LAKE IOWA TO 20 MILES SOUTH SOUTHWEST OF CHANUTE KANSAS.

FOR A COMPLETE DEPICTION OF THE WATCH SEE THE ASSOCIATED WATCH

OUTLINE UPDATE (WOUS64 KWNS WOU3).



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...SEVERE TSTMS ARE EXPECTED TO DEVELOP THROUGH MID/LATE

AFTERNOON ACROSS THE REGION. MODERATE INSTABILITY/STEEP LAPSE RATES

COMBINED WITH VERY STRONG VERTICAL SHEAR WILL SUPPORT SUPERCELLS

CAPABLE OF LARGE HAIL AND TORNADOES. WITH INITIAL DEVELOPMENT ACROSS

EASTERN KS AND SOUTHEAST NEB THIS AFTERNOON...THE SEVERE THREAT

SHOULD DEVELOP EASTWARD INTO WESTERN IA/WESTERN MO BY EARLY EVENING.



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

SURFACE AND ALOFT TO 2.5 INCHES. EXTREME TURBULENCE AND SURFACE

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

450. MEAN STORM MOTION VECTOR 24045.





...GUYER

