1 active National Weather Service alert for Washtenaw County right now. This page updates continuously and shows every watch, warning, and advisory issued by NWS Detroit/Pontiac for Washtenaw County and the surrounding Southeast Lower Peninsula (Metro Detroit).
Southeast Michigan — the Metro Detroit region — combines the highest population density in the state with significant severe-weather exposure. Wayne, Oakland, Macomb, Washtenaw, Livingston, and surrounding counties face frequent severe thunderstorms, occasional tornadoes (most notably in Washtenaw and Lenawee), winter storms that can paralyze freeways, and growing concern about urban flash flooding as drainage infrastructure ages. Lakeshore flooding affects Wayne, Macomb, Monroe, and St. Clair counties along Lakes Erie, St. Clair, and Huron.
Washtenaw County is served by NWS Detroit/Pontiac, headquartered in White Lake, MI, which issues all official severe-weather watches, warnings, and advisories for the county under the SAME geographic code MIC161. Alerts shown above come directly from the National Weather Service public-alerts feed and update within seconds of issuance.
Based on Washtenaw County's southeast lower peninsula (metro detroit) geography, residents and visitors should be prepared for these recurring weather threats:
A Tornado Warning means a tornado has been sighted or indicated by radar in Washtenaw County or an adjacent area — take shelter immediately. Move to the lowest floor of a sturdy building, away from windows, and into an interior room (basement, bathroom, or closet). Mobile homes and vehicles are not safe; if you're in either, leave for a sturdy structure if you can do so safely. Tornado Warnings are typically issued for 30–60 minutes; stay sheltered until the warning expires or NWS Detroit/Pontiac confirms the threat has passed. Washtenaw County residents should monitor a NOAA Weather Radio (programmed for SAME code MIC161), local TV, or this page.
A Flood Warning means flooding is occurring or imminent in Washtenaw County. Do not drive through flooded roads — most flood-related deaths in Michigan occur in vehicles attempting to cross water. If you live in a low-lying area near Ann Arbor or along major waterways in the county, monitor official water-level reports from the U.S. Geological Survey and prepare to move to higher ground. Flash Flood Warnings carry the same urgency on a shorter time horizon — typically less than an hour to act.
Winter Storm Warnings in Washtenaw County indicate hazardous winter weather (heavy snow, freezing rain, sleet, or blizzard conditions) is occurring or imminent. Avoid travel; if you must drive, carry an emergency kit (blankets, food, water, flashlight, charged phone). Heating-source safety is critical: never run generators or grills indoors, and check carbon-monoxide detectors before relying on alternative heat sources.
Weather rarely respects county lines — check active alerts in Washtenaw County's neighbors:
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