West Michigan is heading into two rough days: dangerous heat in the lower or middle 90s and two chances for strong to severe thunderstorms. Jeff Porter said the region has "two major weather events to tackle in the next two days," and the combination of heat and humidity could push it to feel like 100 degrees.
The heat is building under dew points in the lower 70s, which is why temperatures that reach the lower or middle 90s on Wednesday and Thursday would feel far hotter than the thermometer shows. Porter said that if highs get there, "it will easily feel like 100 degrees." The National Weather Service in northern Indiana is weighing Heat Advisories for Berrien, Cass, St. Joseph and Branch counties, but cloud cover and the chance for thunderstorms have kept those alerts from going up yet.
That uncertainty runs through the storm forecast, too. Strong to severe thunderstorms could develop Wednesday night, but the window for the needed ingredients is small, and storms may slide around West Michigan instead of hitting it directly. They could split to the north and south, miss the area to the south in Indiana or just to the immediate north, and some strong storms may linger early Thursday morning, especially closer to I-96.
The larger risk comes Thursday night. The Storm Prediction Center has placed the western half of the Lower Peninsula under a 15% risk of damaging winds, then raised the threat to an enhanced 30% risk for Thursday night as an incoming wave, strong winds aloft, an approaching front and leftover boundaries from morning activity line up. That setup could bring damaging wind gusts after 8 or 9 p.m. near and north of Ottawa County and toward northern Lower, with large hail and tornadoes possible, though those remain lower-end threats.
There is still room for the forecast to shift. The strongest storms may end up tracking from Wisconsin toward Muskegon and then into northern Lower, which would leave some communities with little more than heat while others deal with damaging weather. For now, the clearest answer is that West Michigan faces a two-day stretch of oppressive heat and a later, stronger severe-weather threat that has not yet locked onto one exact track.
