When the clouds are thin and nearly opaque, it’s cirrostratus. When it's thicker and lower in the atmosphere, it is an ...

Is it a UFO? Is it a hole in the sky? It's neither — the clouds spotted in the Colorado sky on Wednesday morning are actually ...

Altocumulus castellatus is an indicator of atmospheric instability and a common precursor to thunderstorm development. The example (3.1) below was photographed during mid-morning above the city of ...

Virginia’s northwest sky glowed red for a few hours on Tuesday night into early Wednesday. Additional auroras visible at our latitude are possible in the next few nights.

Monday brought the earliest accumulating snow in over a decade to several locations in western Virginia, but many others got only flurries or no flakes at all.