This picture is not of an alien invasion. It is a thunderstorm cloud called a supercell that was photographed in Glasgow, Montana.
Highway 89: The Best National Park Road Trip Route
Photography In The Parks
Jaw-dropping image of enormous 'supercell' cloud in Glasgow
Some Reflections on My Roadtrip Across the Western United States
Natural Disasters for Wildlife
On Top of Colorado – Mount Elbert – The Adventuring Heidi
Storm Front over Montana Fields
CT Days 23-24 - The Trek
Watch: Rare funnel cloud hovers over Montana mountains
7,983 Thunder Field Stock Photos - Free & Royalty-Free Stock