Image of wall cloud, rain-free base of storm that would soon become tornado-warned & move over Baltimore, MD. View from Ridge Rd near 80, N. of Damascus, MD at 3:37 PM. 2nd image looking E. on 144 at 3:49 PM SW of Mt. Airy. Storm is T-warned. @capitalweather pic.twitter.com/2XdXJWaq51

— Bill Hark (@WTHark) September 4, 2020