As of today (Thursday, Sept. 6, 2018), a Flood Warning is in place for the Fox River at the Algonquin Tailwater and the Fox River at Montgomery.

Kane County also is under a Hazardous Weather Outlook, which includes a limited thunderstorm risk, elevated flooding risk and high swim risk, according to the National Weather Service Chicago.

Areas of showers with a few embedded non-severe thunderstorms are expected through this afternoon. Some locations may experience multiple rounds of thunderstorms that could produce localized flooding.

High waves will create dangerous swimming conditions at all of the southern Lake Michigan beaches today.

There will be additional chances for thunderstorms, mainly south of I-80 Friday though the weekend, the NWS said.

Flood Warnings

The Flood Warning for the Algonquin Tailwater is in place until late Monday night (Sept. 9, 2018), affecting residents in Kane and McHenry counties, according to the National Weather Service Chicago.

At 8:30 a..m., the stage was 9.9 feet. Flood stage is 9.5 feet.

Minor flooding is occurring and remains in the forecast until Monday evening.

The Flood Warning for the Fox River at Montgomery is due to a half inch to an inch of rain over Montgomery in the past 24 to 48 hours.

The Flood Warning is in place until late Friday night.

At 8:30 a.m., the stage was 13.1 feet. Flood stage is 13 feet.

Minor flooding is occurring and in the forecast through Friday afternoon, the NWS said.

Impact From Tropical Storm Gordon

According to the NWS, we should expect periods of rain showers through late this afternoon, mainly south of I-90. The rain focus for Thursday night through Sunday looks to be south of I-80.

(CREDIT: NWS Chicago)

As the remnants of Tropical Cyclone Gordon approach over the weekend, bands of heavy rain are possible, with a very sharp cutoff in the heavy rainfall amounts from south to north.

Depending on the track of the system, the axis of heaviest rain may shift either north or south. The latest thinking on potential rainfall totals for today through Sunday indicate a lighter rain for the Kane County area. However, the NWS Chicago suggests that there is still time for the heavy rain axis to shift north.

Stay tuned for the latest updates at weather.gov/Chicago.

Swim Risks

The Weather Service is warning of dangerous swimming conditions for southern Lake Michigan.

High waves of 3 feet to feet continue along the shores of Lake Michigan. Life threatening waves and currents are expected through Friday morning.

“If you are visiting southern Lake Michigan beaches, stay out of the water!” the NWS says.

For more details, visit the NWS Chicago beach forecast page.

Forecast

The map in the lower right portion of the graphic shows the latest thinking on potential rainfall totals for today through Sunday.

Stay tuned for the latest updates at weather.gov/Chicago.