Last night’s bow echo certainly didn’t disappoint. I first spotted it in Wisconsin when it was a supercell putting down tornadoes near Milwaukee and thought, “That sucker is headed straight at us.” I watched as it hit Lake Michigan, maintaining rotation for a while but eventually morphing into a big bow echo. But what a bow echo! That northern book-end vortex really cranked as it moved inland and into the Kent County area. For a few scans of the radar, it looked like a small hurricane. Little wonder that it generated tornado warnings with a few reports of sightings by spotters and law enforcement.

But nasty a storm as it was, last night’s weather was probably just a prelude to what today, Wednesday, has in store. Veering surface winds taken into account, this could nevertheless be a tornado day for Michigan. The NAM shows a 70 knot 500 mb jet max blowing through the area, CAPE over 2,500, 70 degree dewpoints, and STPs to make a chaser happy.

Looks like it’ll be Kurt Hulst and me on this one. Bill is heading to Lansing to hang out with Ben Holcomb, and I think Mike Kovalchick is going to join them. That’s a good place to start. I’m not sure that I want to play quite so far east early in the game tomorrow, but I’m sure we’ll wind up well east of Lansing before the day is done. As of the 00Z run, it looks like the H5 will be nosing into West Michigan around 18Z, kissing an intensifying LLJ. Kurt and I had talked about setting up shop around I-96 and M-66. We’ll see what the 6Z run has to show us and play it from there.

At last, a Michigan chase with some real potential! And while I had guessed that storm motions would be in the neighborhood of 40 knots, the NAM decelerates them to a very manageable 25 knots. This could prove to be an interesting day, though I hope not a terribly impactful one. Southern Michigan has a lot of population centers, and I inevitably have mixed feelings whenever I see a big weather event shaping up for this area.