The National Weather Service (NWS) issued a tornado warning on April 28 as a storm brought dark rainclouds and lightning to the Tulsa, Oklahoma, area.
The NWS Tulsa bureau alerted the potential for “tornadoes, quarter size hail and wind gusts to around 70 mph” from severe storms heading east across Oklahoma into Arkansas.
Heavy mammatus – or ‘mammary’ – clouds were seen over Tulsa after severe storms swept through the city and surrounding counties. The cloud formation – made up of bulges or pouches at the base of other clouds – is said to form as a result of air turbulence within large cumulonimbus structures.
Hail was also reported in the area. Credit: Jake Ramos via Storyful