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Timeline: When to expect wintry mix change into severe thunderstorms in Metro Detroit

Isolated tornado possible

The weather radar for noon April 2, 2025, in Southeast Michigan (WDIV)

Southeast Michigan is bracing for wet weather, and a winter weather advisory has been issued until 10 a.m. Wednesday for Sanilac County.

A Flood Watch is in effect for portions of Southeast Michigan including Metro Detroit 8 p.m. Wednesday until 8 a.m. Thursday.

1 to 2 inches of rainfall is expected as several rounds of heavy showers and thunderstorms move through the area.

Damaging wind and heavy rainfall will be the main threats along with a risk of tornadoes.

Here’s the timeline:

  • Early morning: A wintry mix is likely north of I-69.
  • 10 a.m. to 2 p.m.: Heavy, steady rainfall. Slight chance for a severe storm to develop due to a lifting warm front.
  • 2 p.m. to 8 p.m.: Scattered showers. Temperatures continue to rise.
  • 5 p.m. to Midnight: Line of strong to severe storms likely with approaching cold front.

The threat heightens after sunset. Here are the threats:

  • Damaging Wind Gusts of 70 mph possible.
  • Isolated Tornadoes possible.
  • Large hail up to an inch in diameter possible.
  • Flooding possible with an overall of 1-2 inches of rainfall forecasted through Thursday morning.

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