Every severe weather report published for McDonough County, Illinois, newest first.
The National Weather Service Quad Cities IA IL warns of visibility of one quarter mile or less across six counties and cities through Friday morning, September 11, 2026.
The National Weather Service in Lincoln has pushed the end time of a dense fog advisory back, extending the window beyond its first issuance.
The National Weather Service St Louis MO has pushed the end time of a dense fog advisory back, saying it now runs longer than first issued.
The National Weather Service has issued a flood watch for parts of Illinois and Missouri, in effect from Thursday, September 3, 2026, through late Monday night.
The National Weather Service warns that heat-related illnesses increase significantly during the ongoing extreme heat and high humidity.
The National Weather Service has extended an Extreme Heat Warning for parts of Iowa, Illinois, and Missouri until 7 PM CDT Friday.
The National Weather Service has issued a Heat Advisory effective from 1 PM Monday to 7 PM CDT Wednesday, September 2, 2026.
The National Weather Service has issued a Heat Advisory for ten counties in central Illinois, with heat index values expected to exceed 100 degrees, in effect until 7 PM CDT Monday.
The National Weather Service has issued a Heat Advisory for parts of Illinois and Missouri, including Greene, Macoupin, and Montgomery counties in Illinois, with heat index values up to 105 expected.
Excessive runoff from heavy rainfall could flood rivers, creeks, and urban areas through early August 20.
A Flood Watch is in effect for 12 counties across central, east central, and west central Illinois from midnight through 10:00 AM CDT on August 16, 2026.
A developing weather situation has prompted a Flood Watch for six zones across west central Illinois and northeast Missouri.