Dense Fog Advisory Extended to 9 AM CDT Friday for Six Central Illinois Counties
The National Weather Service in Lincoln has pushed the end time of a dense fog advisory back, extending the window beyond its first issuance.
Severe Weather in Mason County, Illinois
Every severe weather report published for Mason County, Illinois, newest first.
Extreme Heat Warning Continues in Peoria, Champaign, and Other Central Illinois Counties
The National Weather Service warns that heat-related illnesses increase significantly during the ongoing extreme heat and high humidity.
Heat Advisory in Effect for Central Illinois Counties Until 7 PM Monday
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.
Weather Service Details Flood Risks for 16 Illinois Counties
Excessive runoff from heavy rainfall could flood rivers, creeks, and urban areas through early August 20.
National Weather Service Issues Flood Watch for Central Illinois Counties
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.