Mammatus clouds and lightning were spotted in various locations in Oklahoma, as severe thunderstorms struck the state on May 2.
The National Weather Service in Norman, Oklahoma, warned of severe storms with “all hazards possible” on Monday. A tornado watch was also issued by the National Weather Service for parts of Kansas and Oklahoma.
Storm chaser Chad Casey filmed videos that show mammatus clouds and flashes of lighting as he was traveling through Oklahoma on Monday. Credit: Chad Casey via Storyful