

693 

WWUS20 KWNS 112053

SEL3

SPC WW 112053

IAZ000-NEZ000-SDZ000-120400-



URGENT - IMMEDIATE BROADCAST REQUESTED

SEVERE THUNDERSTORM WATCH NUMBER 443

NWS STORM PREDICTION CENTER NORMAN OK

355 PM CDT THU AUG 11 2016



THE NWS STORM PREDICTION CENTER HAS ISSUED A



* SEVERE THUNDERSTORM WATCH FOR PORTIONS OF

  MUCH OF IOWA

  EASTERN NEBRASKA

  SOUTHEAST SOUTH DAKOTA



* EFFECTIVE THIS THURSDAY AFTERNOON AND EVENING FROM 355 PM UNTIL

  1100 PM CDT.



* PRIMARY THREATS INCLUDE...

  ISOLATED VERY LARGE HAIL EVENTS TO 2 INCHES IN DIAMETER POSSIBLE

  ISOLATED DAMAGING WIND GUSTS TO 70 MPH POSSIBLE

  A TORNADO OR TWO POSSIBLE



SUMMARY...SCATTERED THUNDERSTORMS WILL CONTINUE TO DEVELOP AND

INCREASE IN AREAL COVERAGE AND INTENSITY ALONG A CORRIDOR FROM

NORTHEAST NEBRASKA INTO NORTHERN IOWA.  THIS ACTIVITY WILL PROPAGATE

SLOWLY SOUTHEAST THROUGH THE LATE EVENING HOURS.  LARGE HAIL AND

DAMAGING WINDS ARE THE PRIMARY THREATS.



THE SEVERE THUNDERSTORM WATCH AREA IS APPROXIMATELY ALONG AND 80

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

NORFOLK NEBRASKA TO 20 MILES SOUTH SOUTHEAST OF WATERLOO IOWA.

FOR A COMPLETE DEPICTION OF THE WATCH SEE THE ASSOCIATED WATCH

OUTLINE UPDATE (WOUS64 KWNS WOU3).



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 INCHES. EXTREME TURBULENCE AND SURFACE WIND GUSTS TO 60

KNOTS. A FEW CUMULONIMBI WITH MAXIMUM TOPS TO 500. MEAN STORM

MOTION VECTOR 27025.





...DARROW

