I am only an amatuer meterologist, but I'm pretty sure what I saw. Sunday the 30th, about 14:30 CDT, between Ely and Silver Bay, the weather exploded.
Most of the time, I imagine, weather is the product of two contrasting air masses, about the size of Delaware at least, slowly rubbing up against each other. What Mrs. Octane a I drove through was more like two trains colliding.
We were about here, letting the dogs do their thing inbetween moderate rain showers, when we got up close and personal with two lighning strikes. Loud cracks to be sure, but then the thunder rumbled constantly for several minutes without a break. I got way dark very quickly, and some hail stared to fall. It wasn't the usual white, opaque, round stuff, this was clear and jagged; exatly like what you see on the street when a car window has been smashed.
Time to go.
We headed south and drove right into it. The rain was so hard I slowed to Ford Motor Company's idle speed. The car was darting on the road over the bumpy weird hail, which was of the pea to marble size; just below the sheet metal damage threshhold. It was the thickest 10 minutes of precipitation I ever saw, and in 15 minutes, the sun was shinng and the roads were dry.