Freezing Fog Could Affect Motorists Tonight and Tuesday Morning

The National Weather Service warns motorists to be aware of freezing fog tonight through Tuesday morning in Lake, McHenry, Kane, DuPage, Cook, Kendall, Grundy and Will counties.

The light wind and chilly, moist conditions will continue through Tuesday, according to the National Weather Service forecast, and this should set the stage for areas of dense freezing fog late tonight into Tuesday morning. Plan for extra travel time during the Tuesday morning commute.

• Also on Patch: Authorities Identify Wheeling Man Killed in Snowmobile Accident

Scattered snow showers and flurries are then expected late Tuesday and Tuesday evening, with only a dusting to a few tenths of an inch of snow at most where it snows.

Freezing fog occurs when water droplets in the fog become supercooled. They stay in liquid form until they touch a surface upon which they can freeze and turn into ice. Freezing fog is most likely to form at night and can cause ice buildup on roads and dangerous driving conditions, particularly on bridges because there is no ground insulation beneath the roadway. Freezing fog can also cause ice to build up on power lines.

» learn more about forecast for the week ahead