Lenticular cloud photo gallery Rénald Fortier from Ingenium, Canada's Museums of Science and Innovation suggests that the Montreal sighting might have been lenticular clouds as well.

A UFO-shaped lenticular cloud stunned onlookers in Lianyungang, China, but forecasters say it was likely a result of the terrain. These clouds form when waves of moisture and mountain terrain interact ...

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.

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.

This incredible shot of a UFO-like lenticular cloud atop one of Chile’s most active volcanoes is among those shortlisted for this year’s Weather Photographer of the Year competition.

MANCHESTER, N.H. — A lenticular cloud was photographed over Mount Washington on Tuesday. This unique-looking cloud is caused by wind going over mountainous terrain and other tall obstacles.

Not surprisingly, the state of California has a lot of lenticular clouds due to its rapidly changing landscape from deep valleys to tall mountains. This classification of cloud has been featured ...