Weather Alerts for Chicago, IL
Cook County, Illinois
Chicago is located in Cook County,
Illinois. This page shows active weather alerts
affecting Chicago issued by the National Weather Service.
NWS Forecast Office: Weather alerts for this area are issued by the
National Weather Service LOT office.
2 Currently Active
Alerts for Chicago
Flood Warning
Flood Warning issued April 21 at 8:47PM CDT until April 24 at 1:00PM CDT
Issued 2026-04-21 20:47:00 ·
Expires 2026-04-24 13:00:00 ·
NWS Chicago IL
View full alert ›
Flood Warning
Flood Warning issued April 21 at 8:47PM CDT until April 25 at 1:00AM CDT
Issued 2026-04-21 20:47:00 ·
Expires 2026-04-25 01:00:00 ·
NWS Chicago IL
View full alert ›
Weather Overview for Chicago
Chicago sits on the southwestern shore of Lake Michigan in Cook County, Illinois, where lake-effect snow, blizzards, and bitter Arctic cold dominate winter weather. Spring and summer bring severe thunderstorms with damaging wind and hail, occasional tornadoes, and lakeshore flooding during strong northeast wind events.
Common alert types for this area:
- Winter Storm Warning
- Blizzard Warning
- Severe Thunderstorm Warning
- Tornado Warning
- Wind Chill Warning
- Flash Flood Warning
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