Active Weather Alerts
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: 5:44 PM Apr. 18, 2026 – National Weather Service
...FLOOD WARNING REMAINS IN EFFECT UNTIL FURTHER NOTICE... * WHAT...Minor flooding is occurring and minor flooding is forecast. * WHERE...Fox River from Red Gate Road in St. Charles downstream to Millington, including the Montgomery gauge. * WHEN...Until further notice. * IMPACTS...At 13.5 feet, Low-lying parking lots at city hall and Boy Scout Island are threatened in St. Charles. Fox River Trail is threatened at St. Mary Park in St. Charles. At 14.0 feet, Low-lying park land inundated along IL-25 between Montomgery and Oswego. Low-lying sections of Fabyan Forest Preserve near Batavia, Hurds Island and Gregory Island Park in Aurora, and Riverfront Park in North Aurora are inundated. * ADDITIONAL DETAILS... - At 12:00 PM CDT Saturday the stage was 13.7 feet. - Recent Activity...The maximum river stage in the 24 hours ending at 12:00 PM CDT Saturday was 13.7 feet. The river has climbed slowly due to rainfall yesterday. The river is currently cresting. - Forecast...The river is expected to remain relatively steady just above flood stage for the next several days. - Flood stage is 13.5 feet. - http://www.weather.gov/safety/flood &&
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