A “roll cloud” spotted off the coast of Portugal looked like something out of a movie. Here’s the science behind it.

As the month wraps up with hot temperatures, the first wave of monsoon moisture is moving in, bringing increased cloud cover ...

Monday brought strange skies to the Coachella Valley, with unusual clouds — some evoking UFOs or otherworldly scenes from the film “Interstellar” — hovering over the San Jacinto mountains ...

Cirrus clouds at the level of the jet stream – often about 6 miles (10 kilometers), above the ground – can sometimes move at over 200 miles per hour (320 kilometers per hour).

Monsoonal moisture will mainly affect the mountains with daily afternoon thunderstorms. There is an isolated chance for ...

Clouds move out and ... It will be another windy day with gusts near 35 mph in the Upstate and near 40 mph in the mountains. ... Authorities seek tips after multiple bomb threats in WNC town over ...

Clouds increased Monday afternoon, and they’ll be with us through the night and Tuesday. Rain and snow is showing up on radar well west of us - over Nevada and moving into western Utah. That’s ...

Early Tuesday morning, a delicate, wispy cloud type rarely seen formed over western Montana, lighting up the pre-dawn sky.

A viral video shows clouds of lovebugs swarming a man visiting Gyeyangsan mountain outside Seoul, South Korea. The clip has ...

Portland will see a partly sunny day Friday with high temps reaching about 77 degrees. The evening will see continued mixed ...

More clouds are expected Monday night, especially in the mountains where snow begins after sunset. Winter weather advisories go into effect at 9 p.m. and will last through 6 a.m. Wednesday.

Chief Meteorologist Tom Tasselmyer said temperatures will dip into the mid-70s on Friday. There will be a chance for rain ...