AREAS OF DENSE FOG ACROSS PORTIONS OF EASTERN UPPER AND NORTHERN LOWER MICHIGAN THIS MORNING... A combination of surface observations and satellite imagery show areas of dense fog that have developed over portions of eastern upper and northern lower Michigan. Fog will drop visibilities to a quarter of a mile or less at times through early morning. Be sure to slow down, use low-beam headlights, and leave plenty of room to stop if driving this morning. Fog is expected to dissipate shortly after sunrise.