Quad Cities, IA/IL – Drivers across the Quad Cities region should prepare for reduced visibility and potentially slick road conditions late Monday night into Tuesday morning as fog and freezing fog develop.
According to the National Weather Service Quad Cities office, warm air moving over snow-covered ground will lead to fog forming overnight. With temperatures expected to remain below 32 degrees, forecasters warn that freezing fog could develop, allowing ice to form on untreated roads, bridges, sidewalks, and overpasses.
Visibility may drop to one-quarter mile or less in some locations, particularly during the early morning hours. The greatest impacts are expected during the overnight period and throughout the Tuesday morning commute across eastern Iowa and western Illinois, including Scott, Rock Island, Clinton, and Muscatine counties.
Meteorologists say freezing fog can be especially dangerous because surfaces may appear wet while actually being icy. Areas with lingering snowpack are more susceptible, as moisture near the ground can quickly freeze on contact.
Road conditions may deteriorate rapidly, especially on secondary roads and less-traveled routes. While major highways are more likely to be treated, drivers are still urged to use caution as slick spots may develop unexpectedly.
The National Weather Service advises motorists to slow down, increase following distance, and use low-beam headlights while driving in foggy conditions. Sudden drops in visibility are possible, even over short distances.
Conditions are expected to gradually improve after sunrise Tuesday as temperatures rise and fog dissipates, though lingering slick spots may persist into the morning hours.
Residents are encouraged to monitor updated forecasts and be prepared to adjust travel plans if needed. Allowing extra time and staying alert can help reduce the risk of accidents during foggy and icy conditions.
