Bob Hartig
EF5
I thought folks here might find the attached radar grabs interesting. Right now there appear to be a couple storms firing up by Chicago withing the lake breeze zone. You can see a couple things going on, the most immediately evident being the boundary set up by the lake breeze itself. Nice line of convergence there, where the overall westerly surface flow butts up against the onshore breeze. A closer look at wind barbs reveals backing winds as high as 40 knots feeding into the northernmost cell.
Michigan gets a lot of this kind of lake-induced action. Depending on the time of day, you can find localized helicity to the west or east where you wouldn't normally find it. I'm sure this is why I often see a small sigtor in Berrien County.
EDIT: I regret that the attachments are too small for you to be able to make out the wind barbs very well. For those who are interested, I've posted a similar but more detailed article with larger and more images in my blog.
Michigan gets a lot of this kind of lake-induced action. Depending on the time of day, you can find localized helicity to the west or east where you wouldn't normally find it. I'm sure this is why I often see a small sigtor in Berrien County.
EDIT: I regret that the attachments are too small for you to be able to make out the wind barbs very well. For those who are interested, I've posted a similar but more detailed article with larger and more images in my blog.
Attachments
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