Mammatus clouds create a dramatic evening sky in Newark, USA

On October 17, 2026, in Newark, Delaware, USA, @tflo_wx1317 shared a video showing dramatic mammatus cloud formations over the University of Delaware campus. In the video, heavily textured clouds with distinctive pouch-like formations hang from the cloud base, creating a striking scene at dusk. A tree line, a streetlamp casting a warm orange glow, and a distant intersection are visible beneath the unusual sky. According to reports, mammatus clouds commonly form beneath large thunderstorm clouds and are associated with turbulent weather systems. The display coincided with autumn showers and thunderstorms moving through the Delaware Valley and the Mid-Atlantic region.