Overview
- The National Weather Service extended dense fog advisories Thursday evening to 10:30 p.m. for St. Joseph, Branch and Hillsdale counties, noting fog would fade from south to north.
- Northern lower Michigan advisories issued early Thursday covered 13 counties until 10 a.m., with pockets along I-75 and the Lake Huron shoreline experiencing reduced visibility and potential icing on untreated surfaces.
- Mid-Michigan counties—Osceola, Clare, Mecosta, Isabella, Montcalm and Gratiot—were under an advisory until 7 a.m. Thursday with visibility near a quarter mile.
- Western New York counties—Wyoming, Chautauqua, Cattaraugus, Allegany and Erie—were under a dense fog advisory through 9 a.m. Thursday.
- NWS guidance emphasized slowing down, using low-beam headlights, leaving extra following distance, and pulling off safely with only hazard flashers on during near-zero visibility.