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WWUS20 KWNS 060055

SEL1

SPC WW 060055

ILZ000-WIZ000-LMZ000-060600-



URGENT - IMMEDIATE BROADCAST REQUESTED

Severe Thunderstorm Watch Number 331

NWS Storm Prediction Center Norman OK

800 PM CDT Sun Aug 5 2018



The NWS Storm Prediction Center has issued a



* Severe Thunderstorm Watch for portions of

  Northeast Illinois

  Southeast Wisconsin

  Lake Michigan



* Effective this Sunday night and Monday morning from 800 PM

  until 100 AM CDT.



* Primary threats include...

  Isolated damaging wind gusts to 70 mph possible

  Isolated large hail events to 1.5 inches in diameter possible



SUMMARY...A cluster of thunderstorms over northwest Illinois will

persist for a few more hours, tracking across the watch area.  The

strongest storms may contain gusty/damaging winds and hail.



The severe thunderstorm watch area is approximately along and 30

statute miles north and south of a line from 25 miles west southwest

of Rockford IL to 75 miles east of Rockford IL. 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.



&&



OTHER WATCH INFORMATION...CONTINUE...WW 330...



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

27025.



...Hart

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