Flood Potential Outlook
Issued by NWS Chicago, IL

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FGUS73 KLOT 180830

Hydrologic Outlook
National Weather Service Chicago IL
330 AM CDT Tue Jul 18 2017

Multiple rounds of thunderstorms are possible over northern
Illinois during mid and late week, with the return of a more
humid air mass providing potential for storms to produce heavy
rainfall. While there is a high uncertainty in placement of
storms within the region, there is some signal that along and
north of Interstate 88 in northern Illinois and into Wisconsin may
be the most favored. Given wet antecedent conditions over the Des
Plaines, Fox River, and north branch of the Chicago River basins,
this portion of far northeast Illinois is more susceptible to
flooding than normal if multiple rounds of heavy rainfall were to
pan out.

Those with hydrologic concerns in that area should maintain a
close watch on the rainfall and river stage forecasts which will
become gradually more refined with time.



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