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021 

WWUS20 KWNS 292109

SEL7

SPC WW 292109

IAZ000-MOZ000-NEZ000-300400-



URGENT - IMMEDIATE BROADCAST REQUESTED

TORNADO WATCH NUMBER 367

NWS STORM PREDICTION CENTER NORMAN OK

405 PM CDT SUN JUN 29 2014



THE NWS STORM PREDICTION CENTER HAS ISSUED A



* TORNADO WATCH FOR PORTIONS OF

  WESTERN AND CENTRAL IOWA

  NORTHERN MISSOURI

  EASTERN NEBRASKA



* EFFECTIVE THIS SUNDAY AFTERNOON AND EVENING FROM 405 PM UNTIL

  1100 PM CDT.



* PRIMARY THREATS INCLUDE...

  A COUPLE TORNADOES POSSIBLE

  SCATTERED LARGE HAIL LIKELY WITH ISOLATED VERY LARGE HAIL EVENTS

    TO 3 INCHES IN DIAMETER POSSIBLE

  SCATTERED DAMAGING WIND GUSTS TO 70 MPH POSSIBLE



THE TORNADO WATCH AREA IS APPROXIMATELY ALONG AND 65 STATUTE

MILES NORTH AND SOUTH OF A LINE FROM 20 MILES WEST NORTHWEST OF

GRAND ISLAND NEBRASKA TO 25 MILES EAST SOUTHEAST OF DES MOINES

IOWA.  FOR A COMPLETE DEPICTION OF THE WATCH SEE THE ASSOCIATED

WATCH OUTLINE UPDATE (WOUS64 KWNS WOU7).



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...WDLY SCTD TSTMS EXPECTED TO FORM LATER THIS AFTN AND

EVE WITH CONTINUED HEATING ALONG DIFFUSE W-E BOUNDARY ROUGHLY

PARALLELING INTERSTATE ROUTE 80 OVER ERN NEB/WRN IA. LOW-LVL FLOW

LIKELY WILL REMAIN WEAK GIVEN LINGERING PRESENCE OF E CNTRL KS

MCS/MCV...AND UPR-LVL FORCING FOR ASCENT ESSENTIALLY NEUTRAL. BUT

GIVEN DEGREE OF BUOYANCY /SBCAPE AROUND 4000 J PER KG/...RICH

MOISTURE /PW AOA 1.50 INCHES/...40-50 KT WNWLY DEEP SHEAR...AND

POTENTIAL FOR A FEW DISCRETE SUPERCELLS...A CONDITIONAL RISK FOR

LARGE HAIL...DMGG WIND...AND TORNADOES WILL EXIST.



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 28025.





...CORFIDI

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