Grand Rapids, Mich. – Thunderstorms and triple-digit heat index values are converging on west Michigan by Friday, creating a volatile start to the weekend.
According to the National Weather Service in Grand Rapids, scattered thunderstorms are likely Friday afternoon and again Sunday night through Tuesday. While some will be routine summer storms, a few could turn severe with damaging wind gusts and small hail. Residents near and south of I-96, including Grand Rapids, Holland, and Kalamazoo, could see heat index values in the mid-90s Friday, heightening the risk for heat-related illnesses.
Rain chances begin increasing Friday afternoon (40%) and may spike again Sunday evening, when downpours could lead to localized street flooding. South winds may gust up to 22 mph during the day Friday before calming overnight. Saturday brings a break, with sunshine and highs in the low 80s.
From Sunday through Tuesday, the weather pattern grows more unsettled again, with a renewed chance of strong storms and heavy rain Sunday night (30%) and Monday night (40%). By Tuesday, dry air returns with sunshine and highs in the mid-80s.
📅 Five-Day Forecast (Grand Rapids, MI):
- Friday: 84°F, t-storms by late afternoon, gusty winds
- Saturday: 82°F, sunny, calm winds
- Sunday: 91°F, hot and sunny
- Monday: 87°F, chance of storms
- Tuesday: 84°F, sunny and drier
