pinniped

Morning flights are *usually* better than evening flights when airports start backing up and canceling flights due to weather. So there's that in your favor... (Unless there's something weird about Detroit weather that brings a lot of morning precipitation...)

In the winter, I usually book the first flight out if I can. That way, I generally know the night before if the plane made it into town... Then, as long as they can deice it safely, we're on time.

If it's a giant storm, your best hope is to leave ahead of it. Leaving after it is going to be hard unless you have a very high Delta elite status.