Overview

• At 7:59 p.m. EDT, the National Weather Service issued a severe thunderstorm warning until 8:45 p.m. for Macomb and St. Clair counties, citing penny-size hail and wind gusts up to 60 mph.
• Radar at 7:58 p.m. showed a line from east of Yale to near Emmett to near Almont moving east at 30 mph, with expected damage to roofs, siding and trees.
• The warning outlined likely impacts for Armada, Richmond, Port Huron and Marysville through roughly 8:30 p.m., with advice to move to an interior room on the lowest floor.
• Earlier strong-storm alerts reported marble-size hail and 50 mph gusts in Bay and Tuscola counties, and pea-size hail with 40 mph gusts in Van Buren, Kalamazoo and St. Joseph counties.
• Additional short-term warnings covered Jackson, Washtenaw, Livingston and Oakland counties, with cautions for torrential rain, frequent cloud-to-ground lightning and localized flooding.