US police dashcam captures terrifying tornado footage

A police dashboard camera has captured footage of a tornado in the US which shows the vortex’s incredible last moments.

The video, shot in Woonsocket, South Dakota yesterday, shows two police cars driving through a storm when they make a routine left turn, revealing an enormous tornado spanning the sky.

The 12-minute video sees the system move slowly across Highway 37.

Sirens blaring, both patrol cars slowed down to observe the tornado.

Within minutes, what was a raging, terrifyingly strong tornado peters out into wisps of cloud.