The latest in a series of frontal boundaries is moving through the Great Lakes today. It will eventually end up in the I-95 corridor, where the threats will start to alter a touch. Let's talk about it.

WEDNESDAY

Storms look to ignite in an area that's used to seeing them. But not in a good way. The threat for a tornado or two is the greatest concern, in an area already experiencing a record year in that department.

Timing looks to start after 3 PM CT and run into the dinnertime hour.

Any sort of discrete cell along the front would need to be watched. Those are much more effecient at utilizing ingredients that might otherwise be hard to come by. Thankfully, these are going to be scattered enough and in and out of the area quick enough that flooding isn't a huge concern.

THURSDAY

As the front closes in on the East Coast, the threats shift slightly. The severe threat will continue - in the form of damaging winds primarily - but flash flooding is a growing concern.

What's of some concern is the fact that rain starts early and is so slow to back off in the evening. And it looks like it will be coming down at a decent clip, too. Somer areas could pick up more than 3-4 inches of rain, more than enough to lead to flooding by the evening commute.