Illinois, Indiana Severe Lakeshore Flood Warning | Effective 08/11/2026 09:24

Headline: 
Lakeshore Flood Warning issued August 11 at 11:24AM CDT until August 11 at 5:00PM CDT by NWS Chicago IL
Event: 
Lakeshore Flood Warning
Urgency: 
Expected
Effective: 
August 11, 2026 - 9:24am
Expires: 
August 11, 2026 - 3:00pm
Description: 
* WHAT...Lakeshore Flood Warning. * WHERE...Central and Southern Cook County Illinois, Lake County Indiana, and Cook County Indiana. * WHEN...Through 5pm this Evening. * IMPACTS...FORECAST WAVE HEIGHTS... 3 to 6 feet, with significant, rapid water level fluctuations with potential to flood areas along the lakeshore multiple feet deep.
Instruction: 
A Lakeshore Flood Warning means that flooding is occurring or imminent along the lake. Residents on or near the shore in the warned area should be alert for rising water, and take appropriate action to protect life and property.
Area Description: 
Central Cook; Lake; Porter
Forcast Office: 
NWS Chicago IL
Sender: 
w-nws.webmaster@noaa.gov