Dense Fog Blankets Metro Detroit, Travel Disruptions Expected

Metro Detroit residents are experiencing unusually dense fog conditions, significantly reducing visibility and causing travel disruptions. The persistent fog, reminiscent of conditions in London, is expected to linger, prompting safety advisories for commuters.

What is Fog and Why is it So Prevalent?

Fog is essentially a cloud that forms at ground level. In winter, several factors contribute to its formation:

• Radiation Fog: This develops on clear, calm nights when the ground cools, chilling the air above it until saturation occurs.
• Advection Fog: This forms when mild, humid air moves over a colder surface – such as snow, ice, or frozen ground – and cools from below.
• Freezing Fog: When temperatures are at or below freezing, fog droplets can freeze upon contact with surfaces like roads, trees, and power lines, creating a thin coating of ice.

Metro Detroit’s Unique “Fog Fuel”

Metro Detroit’s proximity to the Great Lakes – the Detroit River, Lake St. Clair, and Lake Erie – exacerbates fog formation. Light winds blowing off these bodies of water introduce moisture into the lower atmosphere. High humidity combined with these light winds draws fog inland, particularly around Detroit. Damp conditions and melting snow further contribute to the problem, adding moisture to the air, especially overnight.

Current Conditions and Travel Advisories

As of February 20, 2026, a Dense Fog Advisory is in effect for Lapeer, Livingston, Macomb, Oakland and St. Clair counties, extending until 10 a.m. Visibility has dropped to as low as zero in some areas, including Port Huron, Pontiac, Windsor, and Adrian. Drivers are urged to use low beam headlights and allow extra travel time. High beams can actually worsen visibility by reflecting off the fog droplets.

Freezing fog is a concern in areas where temperatures are below freezing, such as Lapeer and Port Huron, potentially creating slick spots on roadways.

Looking Ahead: Rain and a Return to Winter

While the fog is expected to linger through the morning, conditions are forecast to become cloudy and dry today. Rain is anticipated to arrive overnight and continue into Wednesday morning, with temperatures potentially reaching near 60 degrees Fahrenheit. However, a return to colder temperatures and the possibility of snow are forecast for Sunday and Monday.

Sources: ClickOnDetroit, Fox2Detroit, National Today