I have seen cumulonimbus clouds (thunderheads) with classic anvil formations at the top. What air mass is above the anvil causing it to flatten? Scott, Bloomingdale, Ill. Dear Scott, The troposphere, ...

A massive cumulonimbus incus cloud is captured from above during an active thunderstorm. The towering anvil-shaped formation ...

HOUSTON — Anvil clouds can often look like an alien spacecraft trying to land, We’ve had emails suggesting there is a UFO in the sky and immediately when I see the picture, it’s an anvil cloud. What ...

Yesterday evening brought with it another round of showers and storms, some of which went severe-warned and produced locally strong winds and some fairly large hail up to the size of quarters at times ...