Cook County, IL Weather Alerts
Every National Weather Service alert issued for Cook County, Illinois, pushed to your phone within moments — county code ILC031, forecast zone 5 zones (ILZ104, ILZ103, ILZ105, ILZ013, ILZ108). Free with StormCast.
Download on Google PlayHow the NWS identifies Cook County
These are the identifiers the National Weather Service uses when it issues a warning here. StormCast watches ILC031 directly rather than matching on place names, which is why an alert arrives whether you are in Alsip or anywhere else in the county.
NWS County Code
ILC031
Forecast Zones
5 zones (ILZ104, ILZ103, ILZ105, ILZ013, ILZ108)
Forecast Office
Romeoville (LOT)
Radar Station
KLOT
Towns covered in Cook County
An NWS alert for Cook County applies to all 95 of these communities. You do not need a separate alert for each one.
River gauges in and around Cook County
StormCast tracks 12 gauges near Cook County. Set a flood-stage alert on any of them to get notified before the water reaches you.
- Des Plaines River at Lyons
- Des Plaines River at Riverside
- Summit Conduit at Summit
- Chicago Sanitary and Ship Canal at Stickney
- Mainstream Deep Tunnel at McCook Reservoir
- Des Plaines River at River Forest
- Salt Creek (IL) at Western Springs
- Addison Creek at Bellwood
- Chicago Sanitary and Ship Canal at Chicago (Western Ave)
- Flag Creek near Willow Springs
- Stony Creek at Worth
- Chicago River at Chicago (Columbus Dr)
Current conditions
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Alert types issued for Cook County
Tornado
Tornado Warning, Tornado Watch, Tornado Emergency and Severe Thunderstorm Warning.
How tornado alerts work →Flooding
Flash Flood Warning, Flood Watch, Flood Advisory and River Flood Warning.
How flood alerts work →Winter
Winter Storm Warning, Ice Storm Warning, Blizzard Warning and Winter Weather Advisory.
Winter warnings explained →Fire Weather
Red Flag Warning and Fire Weather Watch when conditions favor rapid fire spread.
Fire weather alerts →Heat & Cold
Excessive Heat Warning, Heat Advisory, Freeze Warning and Frost Advisory.
Frost & freeze alerts →Cook County weather alert questions
Which NWS forecast zone is Cook County in?
Cook County, Illinois is NWS county code ILC031 and spans 5 forecast zones (ILZ104, ILZ103, ILZ105, ILZ013, ILZ108). Alerts for it are issued by the Romeoville (LOT) Weather Forecast Office, and the nearest NEXRAD radar is KLOT.
Which towns in Cook County are covered?
All of them. NWS alerts are issued at the county and zone level, so a warning for Cook County covers every community inside it, including Alsip, Arlington Heights, Bedford Park, Bellwood, Berkeley, Berwyn, Blue Island, Bridgeview, Broadview, Brookfield, Burbank, Calumet City, Chicago, Chicago Heights, Chicago Ridge, Cicero, Country Club Hills, Des Plaines, Dolton, Elk Grove Village, Elmwood Park, Evanston, Evergreen Park, Flossmoor, Forest Park, Franklin Park, Glencoe, Glenview, Glenwood, Golf, Hanover Park, Harvey, Harwood Heights, Hazel Crest, Hickory Hills, Hillside, Hines, Hoffman Estates, Hometown, Homewood, Justice, Kenilworth, La Grange, La Grange Park, Lansing, Lemont, Lincolnwood, Lyons, Markham, Matteson, Maywood, Melrose Park, Midlothian, Morton Grove, Mount Prospect, Niles, Northbrook, Oak Forest, Oak Lawn, Oak Park, Olympia Fields, Orland Park, Palatine, Palos Heights, Palos Hills, Palos Park, Park Forest, Park Ridge, Posen, Prospect Heights, Richton Park, River Forest, River Grove, Riverdale, Riverside, Robbins, Rolling Meadows, Schaumburg, Schiller Park, Skokie, South Holland, Steger, Stone Park, Streamwood, Summit Argo, Techny, Thornton, Tinley Park, Westchester, Western Springs, Wheeling, Willow Springs, Wilmette, Winnetka and Worth.
Are there river gauges in Cook County?
Yes — StormCast monitors 12 river gauges in and around Cook County, including Des Plaines River at Lyons, Des Plaines River at Riverside, Summit Conduit at Summit. You can set a flood-stage alert on any of them and get a push notification when the water rises.
How fast are alerts for Cook County delivered?
StormCast polls the NWS alert feed every 30 seconds. When a warning is issued for ILC031, the push notification goes out within moments — even with your screen off.