Marathon County, Wisconsin FirstAlerts

Everything reported for Marathon County and within 40 miles of it, at every level. Warnings and official records name the county they apply to, which is the level most of them are issued at.

• Severe WeatherSep 1, 2026, 1:22 a.m. ETWisconsin, United States

  Dense Fog Advisory Issued for Vilas, Oneida, Forest Counties Until 9 AM CDT

  The National Weather Service has issued a Dense Fog Advisory for eight counties in northern Wisconsin, including Vilas, Oneida, and Forest, effective until 9 AM CDT this morning.

• Disaster DeclarationsAug 19, 2026, 1:42 p.m. ETMarathon County, Wisconsin, United States

  Major Disaster Declared for Marathon County Following Storms and Flooding

  Marathon County households are eligible to apply for FEMA grants after a federal major disaster declaration was issued.