

885 

WWUS20 KWNS 191930

SEL3

SPC WW 191930

IAZ000-WIZ000-LMZ000-200100-



URGENT - IMMEDIATE BROADCAST REQUESTED

SEVERE THUNDERSTORM WATCH NUMBER 483

NWS STORM PREDICTION CENTER NORMAN OK

230 PM CDT MON SEP 19 2016



THE NWS STORM PREDICTION CENTER HAS ISSUED A



* SEVERE THUNDERSTORM WATCH FOR PORTIONS OF

  EXTREME NORTHEASTERN IOWA

  SOUTHERN WISCONSIN

  LAKE MICHIGAN



* EFFECTIVE THIS MONDAY AFTERNOON AND EVENING FROM 230 PM UNTIL

  800 PM CDT.



* PRIMARY THREATS INCLUDE...

  SCATTERED LARGE HAIL EVENTS TO 1.5 INCHES IN DIAMETER POSSIBLE

  ISOLATED DAMAGING WIND GUSTS TO 70 MPH POSSIBLE



SUMMARY...THUNDERSTORMS ARE FORMING ALONG AND IMMEDIATELY BEHIND A

SURFACE COLD FRONT THAT WILL MOVE SOUTHEASTWARD ACROSS NORTHEAST

IOWA AND SOUTHERN WISCONSIN THIS AFTERNOON.  THE ENVIRONMENT WILL BE

FAVORABLE FOR ORGANIZED SEVERE STORMS...INCLUDING SUPERCELLS...IN A

NARROW CORRIDOR NEAR THE FRONT.  LARGE HAIL AND ISOLATED DAMAGING

WINDS WILL BE THE MAIN THREATS THROUGH THIS EVENING.



THE SEVERE THUNDERSTORM WATCH AREA IS APPROXIMATELY ALONG AND 30

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

SOUTHWEST OF LONEROCK WISCONSIN TO 15 MILES NORTH NORTHEAST OF

MILWAUKEE WISCONSIN.  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 1.5 INCHES. EXTREME TURBULENCE AND SURFACE WIND GUSTS TO 60

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

MOTION VECTOR 29035.





...THOMPSON

