41°36'N / 87°31'W / Altitude 179 m / 20:54 2026/08/01, America/Chicago (UTC-5)
From: 2026/08/01, 17:30
To: 2026/08/02, 07:00
...The National Weather Service in Chicago has issued a Flood Warning for the following rivers in Indiana...Illinois... Little Calumet River at Munster (Hohman Avenue) affecting Cook and Lake IN Counties. For the Little Calumet River...including South Holland, Munster (Hohman Avenue)...Minor flooding is forecast. * WHAT...Minor flooding is forecast. * WHERE...Little Calumet River from IN-912 in Hammond downstream to confluence with Thorn Creek in South Holland, including the Munster (Hohman Avenue) gauge. * WHEN...Until Sunday morning. * IMPACTS...At 12.5 feet, Most areas outside of the levee-protected area are inundated in Hammond and Munster. * ADDITIONAL DETAILS... - At 4:00 PM CDT Saturday the stage was 11.5 feet. - Forecast...The river is expected to rise above flood stage late this afternoon to a crest of 12.5 feet this evening. It will then fall below flood stage just after midnight tonight. - Flood stage is 12.0 feet. - http://www.weather.gov/safety/flood
Cook, IL; Lake, IN
A Flood Warning means water levels above flood stage are imminent or
may already be occurring. Persons along rivers and streams in the
warned area should take immediate precautions to protect life and
property.
These forecasts are based on observed precipitation as well as
forecast precipitation 24 hours into the future. Changes to the
rainfall forecast, or any additional rainfall after 24 hours, may
cause changes to these river forecasts.
Additional information is available at www.weather.gov.
The next statement will be issued Sunday morning at 700 AM CDT.
NWS Chicago IL
2026/08/01, 16:50From: 2026/08/01, 19:44
To: 2026/08/01, 23:45
* WHAT...Flooding caused by earlier excessive rainfall continues. * WHERE...Southeastern Cook County in northeastern Illinois... Central Will County in northeastern Illinois... Northwestern Lake IN County in northwestern Indiana... * WHEN...Until 1145 PM CDT. * IMPACTS...Creeks and streams may rise out of their banks. Flooding may occur in poor drainage and urban areas. Underpasses may be flooded. Roads and streets may be flooded. * ADDITIONAL DETAILS... - At 739 PM CDT, Doppler radar and automated rain gauges indicated that very heavy rainfall occurred across the warned area earlier. Up to 3 inches of rain fell in the past 3 to 6 hours. - Some locations that will experience flooding include... Hammond, Gary, Tinley Park, Calumet City, Chicago Heights, East Chicago, Lansing, Oak Forest, Harvey, Highland, Munster, Dolton, Park Forest, Homewood, Matteson, Mokena, Frankfort, and South Holland. - http://www.weather.gov/safety/flood
Cook, IL; Will, IL; Lake, INA Flood Warning means flooding is imminent or may already be
occurring. Persons along rivers, creeks, and other waterways should
take immediate precautions to protect life and property.
Turn around, don't drown when encountering flooded roads. Most flood
deaths occur in vehicles.
Be aware of your surroundings and do not drive on flooded roads.NWS Chicago IL2026/08/01, 19:44
From: 2026/08/01, 15:43
To: 2026/08/01, 23:45
* WHAT...High wave action and dangerous currents expected at Lake Michigan beaches. Waves 6 to 9 ft expected. * WHERE...Lake IL, Northern Cook and Central Cook Counties. * WHEN...Through Monday morning. * IMPACTS...Swimming conditions will be life threatening, especially for inexperienced swimmers. For information on swim advisories or bans at Chicago beaches: www. cpdbeaches. com.
CookRemain out of the water to avoid dangerous swimming conditions
and do not venture out onto piers, jetties, breakwalls, or other
shoreline structures.NWS Chicago IL2026/08/01, 15:43From: 2026/08/01, 19:00
To: 2026/08/02, 01:00
* WHAT...Flooding caused by excessive rainfall is expected. * WHERE...Southeastern Cook County in northeastern Illinois... Southeastern DuPage County in northeastern Illinois... Will County in northeastern Illinois... Northern Lake IN County in northwestern Indiana... * WHEN...Until 100 AM CDT. * IMPACTS...Creeks and streams may rise out of their banks. Flooding may occur in poor drainage and urban areas. Underpasses may be flooded. Roads and streets may be flooded. * ADDITIONAL DETAILS... - At 656 PM CDT, Doppler radar and automated rain gauges indicated light to moderate rain occurring in areas where heavy rainfall occurred earlier. Minor flooding is ongoing or expected to begin shortly in the advisory area. - Some locations that will experience flooding include... Chicago, Joliet, Hammond, Gary, Bolingbrook, Orland Park, Tinley Park, Oak Lawn, Romeoville, Plainfield, Calumet City, Merrillville, Woodridge, Chicago Heights, Roseland, Chicago Lawn, Englewood, and South Shore. - http://www.weather.gov/safety/flood
Cook, IL; DuPage, IL; Will, IL; Lake, INA Flood Advisory means minor flooding along waterways and other poor
drainage areas is imminent or may already be occurring. Persons in
the advisory area should use caution and avoid flood waters.NWS Chicago IL2026/08/01, 19:00