This is an updated outlook that has just been issued by the SPC (Storm Prediction Center) for today (May 1, 2017).
Thunderstorms are expected to develop and overspread much of the lower Great Lakes region, the upper Ohio Valley and central Appalachians into the Mid Atlantic region today, accompanied by potentially damaging wind gusts and the risk for a few tornadoes. This activity seems likely to eventually consolidate and grow upscale into an organizing squall line as it crosses the Allegheny mountains and plateau, and to the lee of the Blue Ridge, by early evening.
There is an increasing potential for damaging surface gusts, given the strength of the ambient wind fields, with damaging straight line winds becoming the predominant severe threat. However, supercell structures, within and perhaps ahead of the line as it evolves, may be accompanied by a risk for tornadoes, one or two of which could be strong.
Be alert and prepared in case these storms do spin-up some tornadoes and damaging winds. Be sure to keep an eye on any weather apps or weather radio that you may have, in case there are any watches and warnings issued.
(Image source: SPC, NOAA)