After being skunked a couple times by forecasts for local storms that didn't pan out, Today we have a bit of a surprise. Shear was not especially great south of the warm front. However the best cape and weakest capping were occurring to the south, mostly south of Grand Rapids. Several vigorous updrafts formed early in the afternoon immediately along Lake Michigan. A small window existed where these new storms would stay discrete enough that they perhaps could generate an environment where tornadoes were more likely. A mature storm formed over Ottawa county, and another, newer, much closer storm over Allegan county. We chose the Allegan county target. Chased with my wife this time (really her first time on any serious storm hunt.)
We followed the storm to the Dumont lake area where we witnessed a nice clean rain-free base evolve to produce a boiling wall cloud. Rotation was weak but visible. Later we followed the base a bit further north where the RFD began to really take hold of this storm, as well as precip from a storm to it's south that would eventually merge into our target storm.
At the end of the day a QLCS emerged that was moving very slowly to the west. Giving us a chance to watch a shelf cloud ungulate in a nearly stationary position. The downdraft was a deep green, while the updraft was smooth and fast--much faster than any perceived storm motion. This gave us time to make a great video of the shelf cloud and and a very-wide high-res panorama!
On a local spotter mission I managed to take some pretty impressive video of a wall cloud and updraft complete with striations, in Michigan of all places! What luck. A NWS Skywarn trainer plans to add this footage for the GRR area Skywarn spotter training slides. His mission was to make all of the images and video represent Michigan storms, and this was specifically what he was looking for. Glad to help out!
Another storm that moved over this same area just 45 minutes earlier produced a brief EF-0 tornado touchdown just to the north and west of here in New Salem Twp, MI. Damage occurred to the DeBoer turkey farm there. The storm in my video however produced over 1" hail in northern Allegan county and even right at the GRR NWS office. I also shot video of the same wall cloud, looking rather anemic at that point, passing right over the radar tower there.
Later I was able to snap a few shot of some great updrafts! Here's a weak, rather low topped LP supercell (yet again a rare in Michigan) complete with mammatus forming.
And another much larger storm going on at the same time over in the Lansing area. This one was tornado warned much of the day but did not produce.