Watch as a bizarre "Hail Flow" resembling a moving blob of mud and ice overtakes Tabuk, Saudi Arabia. 😲⁣ ⁣ "Debris Flows" occur when rainfall picks up dirt and debris in the mountains, then flows downstream to areas that can be dry.⁣ ⁣ #hail #weather #storm #mud #debris #worldnews #international #news #accuweather