I don't know about the coverage, but I was caught in it! We, and a ton of other people are by the lakeshore waiting for the fireworks to start. Like prize dopes, we just sit there as we all see these very big and very dark, ominous clouds with a slightly greenish tint approaching, and there's not a wisp of wind in the air. It's the classic calm before the storm. Then suddenly the wind picks up quickly. We all go rushing for our cars as all hell breaks loose with the addition of heavy rains.
My family (Dad, brother, and I) get in the car, close the doors and immediatley a large tree trunk comes crashing down on our front hood. I start praying out loud. Dad says "Oh, shut up" as he gets out, pushes it off the car, revs up the motor and starts driving very slowly as you couldn't see much, but could tell that there was a huge traffic jam of everybody trying to get out. The storm passed quite quickly, but it did drop a pretty good amount of water.