

332 

WWUS20 KWNS 280233

SEL2

SPC WW 280233

IAZ000-KSZ000-MOZ000-281000-



URGENT - IMMEDIATE BROADCAST REQUESTED

SEVERE THUNDERSTORM WATCH NUMBER 232

NWS STORM PREDICTION CENTER NORMAN OK

930 PM CDT MON MAY 27 2013



THE NWS STORM PREDICTION CENTER HAS ISSUED A



* SEVERE THUNDERSTORM WATCH FOR PORTIONS OF

  EXTREME SOUTHWEST IOWA

  EXTREME NORTHEAST KANSAS

  NORTHWEST MISSOURI



* EFFECTIVE THIS MONDAY NIGHT AND TUESDAY MORNING FROM 930 PM

  UNTIL 500 AM CDT.



* PRIMARY THREATS INCLUDE...

  SEVERAL LARGE HAIL EVENTS WITH A FEW VERY LARGE HAIL EVENTS TO 2

    INCHES IN DIAMETER POSSIBLE

  SEVERAL DAMAGING WIND GUSTS TO 70 MPH POSSIBLE

  A FEW TORNADOES POSSIBLE



THE SEVERE THUNDERSTORM WATCH AREA IS APPROXIMATELY ALONG AND 60

STATUTE MILES NORTH AND SOUTH OF A LINE FROM 40 MILES WEST

SOUTHWEST OF FALLS CITY NEBRASKA TO 25 MILES SOUTH OF KIRKSVILLE

MISSOURI.  FOR A COMPLETE DEPICTION OF THE WATCH SEE THE

ASSOCIATED WATCH OUTLINE UPDATE (WOUS64 KWNS WOU2).



PRECAUTIONARY/PREPAREDNESS ACTIONS...



REMEMBER...A SEVERE THUNDERSTORM WATCH MEANS CONDITIONS ARE

FAVORABLE FOR 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. SEVERE THUNDERSTORMS CAN AND OCCASIONALLY

DO PRODUCE TORNADOES.



&&



OTHER WATCH INFORMATION...CONTINUE...WW 230...WW 231...



DISCUSSION...THE EARLIER SUPERCELL CLUSTER NEAR THE KS/NEB BORDER

CONTINUES TO SPREAD EWD WHILE GRADUALLY EVOLVING INTO A LARGER MCS.

GIVEN THE EXPECTED UPSCALE GROWTH AND LIKELY COLD POOL

FORMATION...THE MCS SHOULD MOVE EWD/ESEWD ALONG THE RESIDUAL

FRONT/OUTFLOW INTO NW MO OVERNIGHT.  A CONTINUED INFLUX OF

MOISTURE/INSTABILITY ON THE NOSE OF A DEVELOPING LLJ WILL SUPPORT

THE RISK FOR DAMAGING WINDS/LARGE INTO THE OVERNIGHT HOURS.

MEANWHILE..THE TORNADO THREAT SHOULD CONTINUE TO DIMINISH COMPARED

TO AREAS FARTHER W...THOUGH THE PRESENCE OF THE RESIDUAL BOUNDARY

AND FAIRLY STRONG LOW-LEVEL SHEAR SUGGEST THAT THE RISK OF A BRIEF

TORNADO IS NOT COMPLETELY NEGLIGIBLE.



AVIATION...A FEW SEVERE THUNDERSTORMS WITH HAIL SURFACE AND ALOFT

TO 2 INCHES. EXTREME TURBULENCE AND SURFACE WIND GUSTS TO 60

KNOTS. A FEW CUMULONIMBI WITH MAXIMUM TOPS TO 550. MEAN STORM

MOTION VECTOR 28030.





...THOMPSON

