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Elev 774 ft, 42.27 °N, 88.2 °W

Island Lake, IL Severe Weather Alertstar_ratehome

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Current Station
Personal Weather Station
Location: Island Lake, IL
Elevation: 774ft
Nearby Weather Stations

Active Weather Alerts

Flood Warning
Issued: 9:40 PM Apr. 20, 2026 – National Weather Service
...FLOOD WARNING 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 park land are
expected to flood along the Fox River Chain of Lakes.

* ADDITIONAL DETAILS...
- At 438 PM CDT, River gauges along the Fox River Chain of
Lakes indicated water levels continuing to rise slowly. Water
levels exceeded moderate flood stage earlier today. The
latest forecast from the Illinois Department of Natural
Resources indicates that water levels may near major flood
stage by the middle of this week.
- Water levels are expected to remain above flood stage at
least through the middle of next week, assuming no additional
rainfall occurs. Impacts from this flood may be similar to
those experienced in May of 1973, October of 1986, or June of
2008.
- 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: 9:36 PM Apr. 20, 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 Lower near New Munster.

* WHEN...Until further notice.

* IMPACTS...At 15.0 feet, Highway 50 is closed due to floodwaters
over the highway. There is widespread flooding in the Town of
Wheatland and Village of Salem Lakes.  Floodwaters are into the
lower levels of some homes in those areas along Riverside Drive,
Shorewood Drive, 101st Street and Shorewood Terrace.

* ADDITIONAL DETAILS...
- At 4:00 PM CDT Monday the stage was 14.7 feet.
- Bankfull stage is 10.0 feet.
- Recent Activity...The maximum river stage in the 24 hours
ending at 4:00 PM CDT Monday was 15.0 feet.
- Forecast...The river is expected to fall to 11.3 feet Monday,
April 27.
- Flood stage is 11.0 feet.
- Flood History...This crest compares to a previous crest of
14.5 feet on 04/20/2013.
- http://www.weather.gov/safety/flood

&&

River forecasts are available for some but not all river gaging
locations. The 7 day river forecast takes into account past
precipitation, soil moisture conditions, and predicted
precipitation for the basin. Precipitation is for the next 24 hours
in the future from April through September and for 48 hours in the
future from October through March.

(Stages in ft.)       Bank-       Latest         Forecast stages
-               Flood full       observed        ...for 7 pm...
Location        stage stage     stage/time    Tue  Wed  Thu  Fri
New Munster     11.0  10.0  14.72 4 pm 4/20   14.0 13.5 12.9 12.4

-                    Highest       24 hour change
-                    observed      in river stage
-                    stage in        (ft.) up to     Highest stage
-                    the last      latest observed    forecast in
-                     7 days            stage         next 7 days
New Munster     15.04 7 am 4/19        -0.25       14.80 1 pm 4/20


&&



River Flood Warning
Issued: 4:37 PM Apr. 20, 2026 – National Weather Service
...FLOOD WARNING REMAINS IN EFFECT UNTIL FURTHER NOTICE...

* WHAT...Moderate flooding is occurring and moderate flooding is
forecast.

* WHERE...Des Plaines River from Townline Road in Libertyville
downstream to Palatine Road in Prospect Heights, including the
Lincolnshire gauge.

* WHEN...Until further notice.

* IMPACTS...At 15.0 feet, Structures threatened along IL-22
(Half-Day Road) just east of the river. Multiple structures
threatened near and west of US-45 (Milwaukee Avenue) and Deerfield
Road. Deerfield Road threatened near the river. Multiple trails
inundated in Half-Day Forest Preserve.

* ADDITIONAL DETAILS...
- At 10:45 AM CDT Monday the stage was 15.2 feet.
- Recent Activity...The river is currently cresting near 15.2
feet.
- Forecast...The river is expected to begin a slow fall by
tomorrow.
- Flood stage is 12.5 feet.
- http://www.weather.gov/safety/flood

&&



River Flood Warning
Issued: 4:37 PM Apr. 20, 2026 – National Weather Service
...FLOOD WARNING REMAINS IN EFFECT UNTIL FURTHER NOTICE...

* WHAT...Moderate flooding is occurring and moderate flooding is
forecast.

* WHERE...Des Plaines River from US-41 in Gurnee downstream to
Townline Road in Vernon Hills, including the Gurnee gauge.

* WHEN...Until further notice.

* IMPACTS...At 11.0 feet, US-41 (Skokie Highway) threatened near the
river in Gurnee. Mundelein Water Reclamation Facility property is
threatened near Libertyville.

* ADDITIONAL DETAILS...
- At 10:30 AM CDT Monday the stage was 10.6 feet.
- Recent Activity...The river crested yesterday at 10.7 feet
and has begun a slow fall.
- Forecast...The river is expected to continue a slow fall the
next several days.
- Flood stage is 7.0 feet.
- http://www.weather.gov/safety/flood

&&



River Flood Warning
Issued: 4:37 PM Apr. 20, 2026 – National Weather Service
...FLOOD WARNING REMAINS IN EFFECT UNTIL FURTHER NOTICE...

* WHAT...Moderate flooding is occurring and moderate flooding is
forecast.

* WHERE...Des Plaines River from IL/WI state line downstream to
US-41 in Gurnee, including the Russell gauge.

* WHEN...Until further notice.

* IMPACTS...At 9.5 feet, Residential structures threatened along
Russell Road between the river and Kilbourne Road. Industrial
parking lots threatened along Kilbourne Road.

* ADDITIONAL DETAILS...
- At 10:30 AM CDT Monday the stage was 9.4 feet.
- Recent Activity...The river crested yesterday at 9.6 feet and
has begun a slow fall.
- Forecast...The river is expected to continue a slow fall the
next several days.
- Flood stage is 7.0 feet.
- http://www.weather.gov/safety/flood

&&



River Flood Warning
Issued: 4:08 PM Apr. 20, 2026 – National Weather Service
...FLOOD WARNING REMAINS IN EFFECT UNTIL FURTHER NOTICE...

* WHAT...Moderate 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.
At 12.5 feet, Residences threatened along Edwards Avenue in East
Dundee. Prairie Trail is threatened at the river in Algonquin.
Parking lots threatened in downtown Carpentersville. Low-lying
parking lots threatened at Judson College in Elgin.

* ADDITIONAL DETAILS...
- At 10:30 AM CDT Monday the stage was 11.7 feet.
- Recent Activity...The river stage has been climbing slowly
over the last several days.
- Forecast...The river is expected to crest near 12.2 feet on
Thursday.
- Flood stage is 9.5 feet.
- Flood History...This crest compares to a previous crest of
11.8 feet on 05/23/2020.
- http://www.weather.gov/safety/flood

&&



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