Active Weather Alerts
River Flood Warning
Issued: 8:57 PM Apr. 18, 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 16.0 feet, Many county highways are closed or impassable. Highway 50 is closed. There is widespread flooding in the Town of Wheatland and Village of Salem Lakes, including Trevor. Some homes near the riverhave 1-2 ft of water on their main levels. * ADDITIONAL DETAILS... - At 3:00 PM CDT Saturday the stage was 14.8 feet. - Bankfull stage is 10.0 feet. - Recent Activity...The maximum river stage in the 24 hours ending at 3:00 PM CDT Saturday was 14.8 feet. - Forecast...The river is expected to rise to a crest of 15.8 feet tomorrow evening. - Flood stage is 11.0 feet. - Flood History...This crest compares to a previous crest of 15.2 feet on 06/15/2008. - 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 1 pm... Location stage stage stage/time Sun Mon Tue Wed New Munster 11.0 10.0 14.83 3 pm 4/18 15.6 15.8 15.3 14.8 - 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 14.83 3 pm 4/18 0.85 15.80 1 pm 4/20 &&
Flood Warning
Issued: 7:20 PM Apr. 18, 2026 – National Weather Service
...FLOOD WARNING IN EFFECT UNTIL 1 PM CDT SATURDAY... * WHAT...Flooding caused by excessive rainfall is expected. * WHERE...A portion of northeast Illinois, including the following counties, Lake IL and McHenry. * WHEN...Until 100 PM CDT Saturday Apr 25. * IMPACTS...Numerous roads, yards, structures, and park land are expected to flood along the Fox River Chain of Lakes. * ADDITIONAL DETAILS... - At 145 PM CDT, River gauges along the Fox River Chain of Lakes indicated slowly rises water levels due to recent rainfall across the area. - Water levels may near major flood stage by the middle of next week and remain above flood stage potentially for several weeks. 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... Now is the time to prepare for flooding that hasn't occurred in several years. Residents living along the immediate shorelines of the Fox River Chain of Lakes need to take precautions to protect property including moving valuables to higher ground. Turn around, don't drown when encountering flooded roads. Most flood deaths occur in vehicles. &&
Small Craft Advisory
Issued: 6:54 PM Apr. 18, 2026 – National Weather Service
...SMALL CRAFT ADVISORY REMAINS IN EFFECT UNTIL 10 PM CDT THIS EVENING... * WHAT...Northwest winds to 25 kt and significant waves to 5 ft. * WHERE...Illinois and Indiana nearshore from Winthrop Harbor IL to Michigan City IN. * WHEN...Until 10 PM CDT this evening. * IMPACTS...Conditions will be hazardous to small craft. PRECAUTIONARY/PREPAREDNESS ACTIONS... Inexperienced mariners, especially those operating smaller vessels, should avoid navigating in hazardous conditions. &&
Freeze Watch
Issued: 6:29 PM Apr. 18, 2026 – National Weather Service
...FROST ADVISORY IN EFFECT FROM MIDNIGHT CDT /1 AM EDT/ TONIGHT TO 9 AM CDT /10 AM EDT/ SUNDAY... ...FREEZE WATCH IN EFFECT FROM LATE SUNDAY NIGHT THROUGH MONDAY MORNING... * WHAT...For the Frost Advisory, temperatures as low as 33 will result in frost formation. For the Freeze Watch, sub-freezing temperatures as low as 28 possible. * WHERE...Portions of central, east central, north central, and northeast Illinois and northwest Indiana. * WHEN...For the Frost Advisory, from midnight CDT /1 AM EDT/ tonight to 9 AM CDT /10 AM EDT/ Sunday. For the Freeze Watch, from late Sunday night through Monday morning. * IMPACTS...Frost and freeze conditions could kill crops, other sensitive vegetation and possibly damage unprotected outdoor plumbing. Frost could harm sensitive outdoor vegetation. Sensitive outdoor plants may be killed if left uncovered. PRECAUTIONARY/PREPAREDNESS ACTIONS... Take steps now to protect tender plants from the cold. &&
Frost Advisory
Issued: 6:29 PM Apr. 18, 2026 – National Weather Service
...FROST ADVISORY IN EFFECT FROM MIDNIGHT CDT /1 AM EDT/ TONIGHT TO 9 AM CDT /10 AM EDT/ SUNDAY... ...FREEZE WATCH IN EFFECT FROM LATE SUNDAY NIGHT THROUGH MONDAY MORNING... * WHAT...For the Frost Advisory, temperatures as low as 33 will result in frost formation. For the Freeze Watch, sub-freezing temperatures as low as 28 possible. * WHERE...Portions of central, east central, north central, and northeast Illinois and northwest Indiana. * WHEN...For the Frost Advisory, from midnight CDT /1 AM EDT/ tonight to 9 AM CDT /10 AM EDT/ Sunday. For the Freeze Watch, from late Sunday night through Monday morning. * IMPACTS...Frost and freeze conditions could kill crops, other sensitive vegetation and possibly damage unprotected outdoor plumbing. Frost could harm sensitive outdoor vegetation. Sensitive outdoor plants may be killed if left uncovered. PRECAUTIONARY/PREPAREDNESS ACTIONS... Take steps now to protect tender plants from the cold. &&
River Flood Warning
Issued: 5:44 PM Apr. 18, 2026 – National Weather Service
...FLOOD WARNING REMAINS IN EFFECT UNTIL FURTHER NOTICE... * WHAT...Moderate flooding is occurring and moderate 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 11:30 AM CDT Saturday the stage was 11.1 feet. - Recent Activity...The maximum river stage in the 24 hours ending at 11:30 AM CDT Saturday was 11.2 feet. The river climbed overnight due to rainfall yesterday. - Forecast...The river is expected to rise to near 11.5 feet by tomorrow. The river will then slowly climb to a crest near 11.8 feet next Wednesday. - 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 &&
River Flood Warning
Issued: 5:16 PM Apr. 18, 2026 – National Weather Service
...FLOOD WARNING NOW IN EFFECT UNTIL THURSDAY MORNING... * WHAT...Moderate flooding is occurring and major 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 Thursday morning. * IMPACTS...At 16.0 feet, Numerous structures threatened along US-45 (Milwaukee Avenue) between IL-22 (Half Day Road) and Deerfield Road. Access route threatened for numerous residences near US-45 (Milwaukee Avenue) and Deerfield Road. IL-60 (Townline Road) threatened near the river. * ADDITIONAL DETAILS... - At 11:45 AM CDT Saturday the stage was 14.8 feet. - Recent Activity...The maximum river stage in the 24 hours ending at 11:45 AM CDT Saturday was 14.8 feet. The river has been climbing due to rainfall yesterday evening. - Forecast...The river is expected to rise to a crest near 15.8 feet tomorrow. - Flood stage is 12.5 feet. - Flood History...This crest compares to a previous crest of 15.8 feet on 05/18/2020. - http://www.weather.gov/safety/flood &&
River Flood Warning
Issued: 5:16 PM Apr. 18, 2026 – National Weather Service
...FLOOD WARNING NOW 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 11:30 AM CDT Saturday the stage was 10.3 feet. - Recent Activity...The maximum river stage in the 24 hours ending at 11:30 AM CDT Saturday was 10.3 feet. The river has been climbing due to rainfall yesterday evening. - Forecast...The river is expected to crest near 10.9 feet by tomorrow morning. - Flood stage is 7.0 feet. - Flood History...This crest compares to a previous crest of 10.5 feet on 09/15/2019. - http://www.weather.gov/safety/flood &&
River Flood Warning
Issued: 5:16 PM Apr. 18, 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 11:30 AM CDT Saturday the stage was 9.5 feet. - Recent Activity...The maximum river stage in the 24 hours ending at 11:30 AM CDT Saturday was 9.5 feet. The river is now cresting. - Forecast...The river is expected to begin a slow fall by late tonight. - Flood stage is 7.0 feet. - Flood History...This crest compares to a previous crest of 9.5 feet on 06/11/2008. - http://www.weather.gov/safety/flood &&
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