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Tornado Watch 258
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WW0258 Radar
Hazard Tornadoes EF2+ Tornadoes
Likelihood Moderate Low
Severe Wind 65 kt+ Wind
Moderate Moderate
Severe Hail 2"+ Hail
Moderate Moderate

Note:  The expiration time in the watch graphic is amended if the watch is replaced, cancelled or extended.
Note: Click for Watch Status Reports.
   SEL8
   
   URGENT - IMMEDIATE BROADCAST REQUESTED
   TORNADO WATCH NUMBER 258
   NWS STORM PREDICTION CENTER NORMAN OK
   145 PM CDT THU MAY 7 2009
   
   THE NWS STORM PREDICTION CENTER HAS ISSUED A
   TORNADO WATCH FOR PORTIONS OF 
   
          PARTS OF SOUTHWEST IOWA
          PARTS OF NORTHEAST KANSAS
          LARGE PART OF NORTHERN MISSOURI
          PARTS OF SOUTHEAST NEBRASKA
   
   EFFECTIVE THIS THURSDAY AFTERNOON AND EVENING FROM 145 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 90 STATUTE
   MILES NORTH AND SOUTH OF A LINE FROM 30 MILES WEST OF FALLS CITY
   NEBRASKA TO 35 MILES SOUTH SOUTHEAST OF KIRKSVILLE MISSOURI.  FOR
   A COMPLETE DEPICTION OF THE WATCH SEE THE ASSOCIATED WATCH
   OUTLINE UPDATE (WOUS64 KWNS WOU8).
   
   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...LOW LEVEL MOISTURE AND INSTABILITY RETURNING RAPIDLY
   ERN KS ON 30KT LLJ.  CONVERGENCE ALONG BOUNDARY SERN NEB EWD INTO
   SWRN IA WILL BE FOCUS FOR STORM INITIATION.  STRONG VEERING SHEAR
   PROFILES AND STEEP MID LEVEL LAPSE RATES SUPPORT RAPID DEVELOPMENT
   OF STRONG/SEVERE THUNDERSTORMS VICINITY OF BOUNDARY.  SUPERCELLS
   LIKELY...WHICH WILL THEN MOVE/DEVELOP E/SE INTO RETURNING
   INSTABILITY.  VERY LARGE HAIL IS LIKELY WITH ANY SUPERCELL AND
   TORNADO THREAT WILL INCREASE THRU THE AFTERNOON AS STORMS MOVE INTO
   GREATER INSTABILITY.
   
   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 30025.
   
   
   ...HALES
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