Timelapse footage of thunderstorms rolling through the night sky. In the first part of the clip, the Milky Way and the constellation Sagittarius are seen setting, before a large cumulonimbus cloud arrives and produces prodigious lightning. After that passes there is a short period of clear skies before a spectacular cumulonimbus with a distinct anvil develops, bringing more lightning. Filmed near Rapid City, South Dakota, USA.