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196 

WWUS20 KWNS 101930

SEL7

SPC WW 101930

IAZ000-KSZ000-MOZ000-NEZ000-110300-



URGENT - IMMEDIATE BROADCAST REQUESTED

SEVERE THUNDERSTORM WATCH NUMBER 137

NWS STORM PREDICTION CENTER NORMAN OK

230 PM CDT SAT MAY 10 2014



THE NWS STORM PREDICTION CENTER HAS ISSUED A



* SEVERE THUNDERSTORM WATCH FOR PORTIONS OF

  SOUTHWEST IOWA

  EASTERN KANSAS

  NORTHWEST AND WEST-CENTRAL MISSOURI

  FAR SOUTHEAST NEBRASKA



* EFFECTIVE THIS SATURDAY AFTERNOON AND EVENING FROM 230 PM UNTIL

  1000 PM CDT.



* PRIMARY THREATS INCLUDE...

  SCATTERED LARGE HAIL LIKELY WITH ISOLATED VERY LARGE HAIL EVENTS

    TO 3 INCHES IN DIAMETER POSSIBLE

  ISOLATED DAMAGING WIND GUSTS TO 70 MPH POSSIBLE

  A TORNADO OR TWO POSSIBLE



THE SEVERE THUNDERSTORM WATCH AREA IS APPROXIMATELY ALONG AND 60

STATUTE MILES EAST AND WEST OF A LINE FROM 45 MILES SOUTH OF

CHANUTE KANSAS TO 40 MILES EAST NORTHEAST OF SHENANDOAH IOWA.

FOR A COMPLETE DEPICTION OF THE WATCH SEE THE ASSOCIATED WATCH

OUTLINE UPDATE (WOUS64 KWNS WOU7).



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.



&&



DISCUSSION...RAPID TSTM DEVELOPMENT IS ANTICIPATED ALONG A DRYLINE

AND WARM FRONT WHERE THE ENVIRONMENT HAS BECOME MODERATELY UNSTABLE.

WIND PROFILES ACROSS THE AREA INDICATE AN ENVIRONMENT FAVORABLE FOR

SUPERCELLS CAPABLE OF VERY LARGE HAIL. WHILE A TORNADO OR TWO IS

POSSIBLE...GROWING T-TD SPREADS AND MARGINALLY STRONG LOW-LEVEL

SHEAR SHOULD MITIGATE A MORE SUBSTANTIAL THREAT. SHOULD SUBSEQUENT

OBSERVATIONS DIVERGE FROM THIS NOTION...AN UPGRADE TO A TORNADO

WATCH MAY BE REQUIRED OVER A PORTION OF THE SEVERE THUNDERSTORM

WATCH AREA.



AVIATION...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 27030.





...MEAD

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