Weather Alerts For Isle Royale Natl Park, MI

URGENT - WINTER WEATHER MESSAGE National Weather Service Marquette MI 241 AM EDT Wed Mar 11 2026 Keweenaw-Northern Houghton- Including the cities of Hancock, Houghton, and Copper Harbor 241 AM EDT Wed Mar 11 2026 ...WINTER WEATHER ADVISORY REMAINS IN EFFECT UNTIL 2 PM EDT THIS AFTERNOON... * WHAT...Snow. Additional snow accumulations between 3 and 5 inches. * WHERE...Keweenaw and Northern Houghton Counties. * WHEN...Until 2 PM EDT this afternoon. * IMPACTS...Plan on slippery road conditions. The hazardous conditions will impact the Wednesday morning commute. PRECAUTIONARY/PREPAREDNESS ACTIONS... Slow down and use caution while traveling. &&