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164 

WWUS20 KWNS 110803

SEL0

SPC WW 110803

IAZ000-KSZ000-NEZ000-111500-



URGENT - IMMEDIATE BROADCAST REQUESTED

SEVERE THUNDERSTORM WATCH NUMBER 140

NWS STORM PREDICTION CENTER NORMAN OK

300 AM CDT SUN MAY 11 2014



THE NWS STORM PREDICTION CENTER HAS ISSUED A



* SEVERE THUNDERSTORM WATCH FOR PORTIONS OF

  SOUTHWEST IOWA

  NORTHERN KANSAS

  SOUTHERN NEBRASKA



* EFFECTIVE THIS SUNDAY MORNING FROM 300 AM UNTIL 1000 AM CDT.



* PRIMARY THREATS INCLUDE...

  SCATTERED LARGE HAIL AND ISOLATED VERY LARGE HAIL EVENTS TO 2

    INCHES IN DIAMETER POSSIBLE

  ISOLATED DAMAGING WIND GUSTS TO 70 MPH POSSIBLE



THE SEVERE THUNDERSTORM WATCH AREA IS APPROXIMATELY ALONG AND 55

STATUTE MILES NORTH AND SOUTH OF A LINE FROM 30 MILES WEST

SOUTHWEST OF KEARNEY NEBRASKA TO 50 MILES SOUTH SOUTHEAST OF

OMAHA NEBRASKA.  FOR A COMPLETE DEPICTION OF THE WATCH SEE THE

ASSOCIATED WATCH OUTLINE UPDATE (WOUS64 KWNS WOU0).



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 139...



DISCUSSION...TSTMS EXPECTED TO INCREASE IN COVERAGE/STRENGTH ALONG

STRENGTHENING WSW-ENE WARM FRONT NOW ALONG THE KS-NEB BORDER. WAA

AND MOISTURE TRANSPORT NEAR THE BOUNDARY SHOULD INTENSIFY THROUGH

LATER THIS MORNING IN RESPONSE TO /1/ ARRIVAL OF RICHER MOISTURE NOW

OVER CNTRL KS...AND /2/ STRENGTHENING OF SLY LLJ AHEAD OF IMPULSE

NOW ENTERING WRN NEB IN SWLY UPR-LVL FLOW. AMPLE CLOUD-LAYER

BUOYANCY/SHEAR SHOULD DEVELOP TO SUPPORT A RISK FOR SLIGHTLY

ELEVATED SUPERCELLS CAPABLE OF LARGE HAIL AND POSSIBLY DMGG WIND.



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 500. MEAN STORM

MOTION VECTOR 21035.





...CORFIDI

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