The overall severe threat is lower today (level 2 out of 5), but it is more expansive. Some cities at risk include Detroit, Indianapolis, St. Louis, Columbus, Cleveland, Louisville and Buffalo. Damaging winds and large hail will be the main threats, although an isolated tornado cannot be ruled out. The threat shifts east to include the Interstate 95 corridor, from Boston to Washington on Wednesday. Watch this for your latest hour-by-hour forecast.