An Air Force investigation later concluded that what Arnold really saw were disc-shaped wave clouds called lenticular clouds, which are not uncommon in the Cascades and on top of Mt. Rainier, the ...

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

At 1:47 p.m. on Tuesday, the NWS Medford OR released a fire weather watch valid for Thursday between 1 p.m. and 11 p.m. The watch is for Western Klamath National Forest, Central Siskiyou County ...

On Wednesday at 12:16 p.m. a red flag warning was released by the NWS Medford OR valid for Thursday between 1 p.m. and 11 p.m. The warning is for Western Klamath National Forest, Central Siskiyou ...

Landscape sketch showing a view of Mt. Katahdin from the southeast shore of Katahdin Lake in Maine. In the foreground, numerous rocks emerge from the water near the lake's shore, which is visible in ...

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 ...