

921 

WWUS20 KWNS 210152

SEL9

SPC WW 210152

IAZ000-KSZ000-MOZ000-NEZ000-210800-



URGENT - IMMEDIATE BROADCAST REQUESTED

SEVERE THUNDERSTORM WATCH NUMBER 339

NWS STORM PREDICTION CENTER NORMAN OK

855 PM CDT FRI JUN 20 2014



THE NWS STORM PREDICTION CENTER HAS ISSUED A



* SEVERE THUNDERSTORM WATCH FOR PORTIONS OF

  SOUTHWESTERN IOWA

  EXTREME NORTHERN KANSAS

  NORTHWESTERN MISSOURI

  CENTRAL AND SOUTHERN NEBRASKA



* EFFECTIVE THIS FRIDAY NIGHT AND SATURDAY MORNING FROM 855 PM

  UNTIL 300 AM CDT.



* PRIMARY THREATS INCLUDE...

  SCATTERED DAMAGING WIND GUSTS TO 70 MPH POSSIBLE

  ISOLATED VERY LARGE HAIL EVENTS TO 2 INCHES IN DIAMETER POSSIBLE



THE SEVERE THUNDERSTORM WATCH AREA IS APPROXIMATELY ALONG AND 60

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

KEARNEY NEBRASKA TO LAMONI IOWA.  FOR A COMPLETE DEPICTION OF THE

WATCH SEE THE ASSOCIATED WATCH OUTLINE UPDATE (WOUS64 KWNS WOU9).



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 336...WW 337...WW 338...



DISCUSSION...TWO PRIMARY TSTM COMPLEXES ARE EXPECTED TO CONTINUE

UPSCALE EVOLUTION FOR ANOTHER FEW HOURS...WITH NET MOTION SWD TO

SEWD ACROSS WW AREA TOWARD NRN KS AND NWRN MO.  TSTMS WILL OFFER

PRIMARILY DAMAGING-GUST THREAT.  ISOLATED LARGE HAIL ALSO REMAINS

POSSIBLE.  REF SPC MESOSCALE DISCUSSION 1100 FOR FURTHER INITIAL

DETAILS.



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 29025.





...EDWARDS

