Westerly winds over Main Range caused an oscillating "mountain wave" effect which lasted a few hours on Monday.

This is the spectacular moment a stunning UFO-shaped cloud formation loomed over a village in the Philippines. Footage captured by Peter John Lebo shows thick, dark clouds blanketing the sky in Digos ...

As a round, orange-tinted cloud hovered Thursday over Bursa, Turkey, it might have looked like a flying saucer was about to land. But it was just a lenticular cloud — not uncommon in the ...

Have you ever looked up at the sky and been struck speechless by a cloud so strange it seemed like a message from another world? ... Read more The post 13 Rare Cloud Formations and What They Mean ...

Lenticular clouds form repeatedly in some places. Here is why and how they form, and how they trick some people into thinking they're UFOs.

Lenticular Clouds Shrouding the Peaks of Mount McKinley (Getty Images/Ron Sanford) On June 24, 1947, pilot Kenneth Arnold reported seeing multiple mysterious, gleaming circular objects along the ...

Last week, the internet gawked over a ruby-red, cinnamon-bun cloud that hung in the skies over Bursa, Turkey. This week, the same phenomenon was sighted in California — except this time it ...

These one-of-a-kind Lenticular clouds have fooled the best of ’em over the years — including an airborne pilot who saw the disk-shaped object by Mount Rainier of Washington in 1947.

Other formations known as lenticular clouds also took shape and sat in place over the valley, leaving what nearly resembles flying saucers hovering above the desert. Westerink said such clouds are ...

These are technically called standing waves. Finally, when a lenticular cloud is in contact with the top of the mountain, it is called a cap cloud.

Dome- and pancake-shaped clouds were seen across New Hampshire skies Thursday morning. These clouds are known as lenticular clouds or lens clouds. They're not uncommon at higher elevations. These ...

Lenticular Clouds Shrouding the Peaks of Mount McKinley (Getty Images/Ron Sanford) On June 24, 1947, pilot Kenneth Arnold reported seeing multiple mysterious, gleaming circular objects along the crest ...