Fog and low clouds have expanded into portions of eastern upper Michigan, along with north central and northeast lower Michigan. Fog is most widespread near Lake Huron. Visibilities are occasionally dipping to a quarter mile or less. Fog will burn over interior sections after sunrise this morning. However, for places very near Lake Huron, fog could persist for much of the morning. Travelers should expect low visibilities in fog at times this morning. Slow down, use low beam headlights, and leave extra space between yourself and the vehicle in front of you.

* WHAT. Dense fog will reduce visibility to less than 1 NM. * WHERE. All of Lake Huron. * WHEN. Until noon EDT Saturday. * IMPACTS. Low visibility will make navigation difficult.