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106 

WWUS20 KWNS 281927

SEL3

SPC WW 281927

IAZ000-KSZ000-MOZ000-NEZ000-290300-



URGENT - IMMEDIATE BROADCAST REQUESTED

TORNADO WATCH NUMBER 233

NWS STORM PREDICTION CENTER NORMAN OK

225 PM CDT TUE MAY 28 2013



THE NWS STORM PREDICTION CENTER HAS ISSUED A



* TORNADO WATCH FOR PORTIONS OF

  SOUTHERN IOWA

  NORTHEAST KANSAS

  NORTHERN MISSOURI

  FAR SOUTHEAST NEBRASKA



* EFFECTIVE THIS TUESDAY AFTERNOON AND EVENING FROM 225 PM UNTIL

  1000 PM CDT.



* PRIMARY THREATS INCLUDE...

  SEVERAL TORNADOES POSSIBLE

  SEVERAL VERY LARGE HAIL EVENTS TO 3 INCHES IN DIAMETER LIKELY

  SEVERAL DAMAGING WIND GUSTS TO 70 MPH POSSIBLE



THE TORNADO WATCH AREA IS APPROXIMATELY ALONG AND 80 STATUTE

MILES NORTH AND SOUTH OF A LINE FROM 25 MILES SOUTH SOUTHWEST OF

CONCORDIA KANSAS TO 60 MILES EAST OF KIRKSVILLE MISSOURI.  FOR A

COMPLETE DEPICTION OF THE WATCH SEE THE ASSOCIATED WATCH OUTLINE

UPDATE (WOUS64 KWNS WOU3).



PRECAUTIONARY/PREPAREDNESS ACTIONS...



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...TSTMS ARE EXPECTED TO INCREASE IN COVERAGE AND

INTENSITY THIS AFTERNOON ALONG SYNOPTIC FRONT EXTENDING FROM LOW

PRESSURE OVER CNTRL KS NEWD ACROSS SRN IA.  OTHER STORMS ONGOING

ALONG AN OUTFLOW BOUNDARY LIFTING NWD THROUGH THE I-70 CORRIDOR OF

MO SHOULD STRENGTHEN AS WELL.  GIVEN THE COMBINATION OF STRONG

INSTABILITY AND 40-50 KT OF DEEP-LAYER SHEAR THE POTENTIAL WILL

EXIST FOR INTENSE SUPERCELLS CAPABLE OF VERY LARGE HAIL AND DAMAGING

WINDS.  GIVEN THE MODEST LOW-LEVEL SHEAR...TORNADO POTENTIAL WILL BE

MODULATED BY MATURE STORMS INTERACTING WITH THE SYNOPTIC FRONT AND

OUTFLOW BOUNDARY WHERE VORTICITY IS ENHANCED.



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

550. MEAN STORM MOTION VECTOR 26025.





...MEAD

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