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Elev 844 ft, 42.41 °N, 88.21 °W

McHenry, IL Severe Weather Alertstar_ratehome

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Current Station
Personal Weather Station
Location: McHenry, IL
Elevation: 844ft
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Active Weather Alerts

Flood Warning
Issued: 6:53 PM Apr. 23, 2026 – National Weather Service
...FLOOD WARNING REMAINS IN EFFECT UNTIL FURTHER NOTICE...

* WHAT...Flooding caused by excessive rainfall continues.

* WHERE...A portion of northeast Illinois, including the following
counties, Lake IL and McHenry.

* WHEN...Until further notice.

* IMPACTS...Numerous roads, yards, structures, and areas of park
land are flooding along the Fox River Chain of Lakes. Flooding
will continue through at least next week.

* ADDITIONAL DETAILS...
- At 138 PM CDT, River gauges along the Fox River Chain of
Lakes indicate that water levels have remained nearly steady
for the past 24 hours and are likely at a crest in major
flood stage. The latest forecast from the Illinois Department
of Natural Resources indicates that water levels should
begin to slowly fall by Friday.
- Some locations that will experience flooding include areas
along the Fox River Chain of Lakes, including Nippersink
Lake, Fox Lake, Pistakee Lake, Petite Lake, Lake Marie,
Channel Lake, and Lake Catherine.
- http://www.weather.gov/safety/flood

PRECAUTIONARY/PREPAREDNESS ACTIONS...

Turn around, don't drown when encountering flooded roads. Most flood
deaths occur in vehicles.

&&



River Flood Warning
Issued: 3:14 PM Apr. 23, 2026 – National Weather Service
...FLOOD WARNING REMAINS IN EFFECT UNTIL FURTHER NOTICE...

* WHAT...Major flooding is occurring and major flooding is forecast.

* WHERE...Fox River from Johnsburg downstream to Red Gate Road in
St. Charles, including the Algonquin Lock & Dam tailwater gauge.

* WHEN...Until further notice.

* IMPACTS...At 12.0 feet, Structures threatened along River Street,
Johnson Street, and Maiden Lane in East Dundee. North Harrison
Street threatened near Riverside Park in Algonquin. Washington
Street threatened in Carpentersville. Water Street, Edwards
Avenue, and Elgin Avenue threatened in East Dundee. Bayview Road
threatened in Elgin. Low-lying areas of Festival Park are
threatened in Elgin.

* ADDITIONAL DETAILS...
- At 9:30 AM CDT Thursday the stage was 12.0 feet.
- Forecast...The river is expected to crest around 12.0 to 12.1
feet this afternoon through Friday, then begin a very slow
fall but remain above flood stage through next week.
- Flood stage is 9.5 feet.
- http://www.weather.gov/safety/flood

&&



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