It looks like something from a disaster film.
The mass of grey clouds swirling and twisting in the sky seem too huge, too oppressive to be real.
But this isn’t the work of special effects.
This incredible time-lapse video shows the moment a supercell storm forms.
A rotating thunderstorm, supercells are made up of mesocyclones – deep, rotating updrafts that contort the clouds around them into a disc shape.
As dangerous as they are breathtaking, supercell storms can manipulate weather up to 20 miles away and last for hours at a time. They tend to produce hail, torrential rainfall and strong winds.
Their rarity is due to the specific conditions required for them to form, so capturing one on camera in this level of detail is quite an achievement.
Oklahoma-based storm chasers Basehunters caught this particular supercell in east Wyoming.
20 May 2014 | 4:50 pm – Source: metro.co.uk