

175 

WWUS20 KWNS 172336

SEL1

SPC WW 172336

IAZ000-KSZ000-MOZ000-NEZ000-180600-



URGENT - IMMEDIATE BROADCAST REQUESTED

SEVERE THUNDERSTORM WATCH NUMBER 511

NWS STORM PREDICTION CENTER NORMAN OK

635 PM CDT THU SEP 17 2015



THE NWS STORM PREDICTION CENTER HAS ISSUED A



* SEVERE THUNDERSTORM WATCH FOR PORTIONS OF

  SOUTHERN IOWA

  NORTHEASTERN KANSAS

  NORTHERN MISSOURI

  EXTREME SOUTHEASTERN NEBRASKA



* EFFECTIVE THIS THURSDAY NIGHT AND FRIDAY MORNING FROM 635 PM

  UNTIL 100 AM CDT.



* PRIMARY THREATS INCLUDE...

  SCATTERED LARGE HAIL AND ISOLATED VERY LARGE HAIL EVENTS TO 2.5

    INCHES IN DIAMETER POSSIBLE

  ISOLATED DAMAGING WIND GUSTS TO 70 MPH POSSIBLE



SUMMARY...SEVERE THUNDERSTORMS ARE EXPECTED TO BECOME MORE

CONCENTRATED DURING THE NEXT FEW HOURS AS ACTIVITY SHIFTS EASTWARD

ACROSS THE MISSOURI VALLEY AND OVER MORE OF THE WATCH AREA.

DAMAGING GUSTS AND LARGE HAIL ARE EXPECTED.  FOR METEOROLOGICAL

DETAILS...SEE SPC MESOSCALE DISCUSSION 1811.



THE SEVERE THUNDERSTORM WATCH AREA IS APPROXIMATELY ALONG AND 80

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

SOUTHWEST OF SAINT JOSEPH MISSOURI TO 45 MILES NORTH NORTHEAST OF

LAMONI IOWA.  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.



&&



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 27025.





...EDWARDS

