Some thunderstorms may produce damaging winds and heavy rainfall.
The storms will be mainly south of I-96. Large hail to around 1 inch is possible. Heavy rains may lead to flash floods south of I-96 late this evening and overnight.
Meteorologists say tornadoes are possible tonight, mainly across Illinois, Indiana and Ohio.
Forecast for the Grand Haven area tonight: Showers and thunderstorms, mainly before 5 a.m. Some storms could be severe, with damaging winds and heavy rain. Low around 65. Northeast wind 6 to 11 mph increasing to 12 to 17 mph in the evening. Chance of precipitation is 90 percent. New rainfall amounts between a quarter and half of an inch possible.
Thursday: A 30 percent chance of showers and thunderstorms before 9 a.m. Mostly sunny, with temperatures falling to around 65 by 9 a.m. Breezy, with a north-northwest wind 14 to 20 mph.