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108 

WWUS20 KWNS 161216

SEL1

SPC WW 161216

IAZ000-NEZ000-SDZ000-161900-



URGENT - IMMEDIATE BROADCAST REQUESTED

SEVERE THUNDERSTORM WATCH NUMBER 301

NWS STORM PREDICTION CENTER NORMAN OK

715 AM CDT MON JUN 16 2014



THE NWS STORM PREDICTION CENTER HAS ISSUED A



* SEVERE THUNDERSTORM WATCH FOR PORTIONS OF

  WESTERN IOWA

  CENTRAL AND EASTERN NEBRASKA

  SOUTHEAST SOUTH DAKOTA



* EFFECTIVE THIS MONDAY MORNING AND AFTERNOON FROM 715 AM UNTIL

  200 PM CDT.



* PRIMARY THREATS INCLUDE...

  SCATTERED LARGE HAIL LIKELY WITH ISOLATED VERY LARGE HAIL EVENTS

    TO 2.5 INCHES IN DIAMETER POSSIBLE

  ISOLATED DAMAGING WIND GUSTS TO 70 MPH POSSIBLE



THE SEVERE THUNDERSTORM WATCH AREA IS APPROXIMATELY ALONG AND 95

STATUTE MILES EAST AND WEST OF A LINE FROM 20 MILES SOUTH

SOUTHWEST OF BEATRICE NEBRASKA TO 10 MILES NORTH NORTHWEST OF

MITCHELL SOUTH DAKOTA.  FOR A COMPLETE DEPICTION OF THE WATCH SEE

THE ASSOCIATED WATCH OUTLINE UPDATE (WOUS64 KWNS WOU1).



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...ELEVATED TSTMS EXPECTED TO INCREASE IN

COVERAGE/STRENGTH ATOP NW-SE WARM FRONT DEVELOPING SLOWLY ENE ACROSS

REGION. QUALITY OF MOISTURE RETURN /PW AOA 1.50 INCHES/ AND PRESENCE

OF DEEP EML WITH AMPLE CLOUD-LAYER SHEAR FOR SUSTAINED

STORMS/SUPERCELLS SUGGESTS A RISK FOR LARGE HAIL AND POSSIBLY

LOCALLY DMGG WIND. ONE OR TWO STORMS MAY BECOME NEARLY SFC BASED

OVER ERN NEB/WRN IA LATER THIS MORNING OR EARLY THIS AFTN...AND MAY

POSE A MORE SIGNIFICANT SVR RISK AT THAT TIME.



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

TO 2.5 INCHES. EXTREME TURBULENCE AND SURFACE WIND GUSTS TO 60

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

MOTION VECTOR 23035.





...CORFIDI

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