What is Hail?

The measure of the water vapor or moisture content in the air, expressed as the mass of water vapor per unit volume of air....

Cloud or rain droplets containing pollutants, such as oxides of sulfur and nitrogen, to make them acidic.

A cold core low is a low-pressure system where the coldest temperatures are found near the center. These systems are often...

The upward movement of air caused by a topographic barrier, such as a mountain, which can lead to cloud formation and precipitation.

Considerable cloudiness refers to weather conditions where a large portion of the sky is covered with clouds, but some clear...

Precipitation in the form of small balls or lumps of ice that form in thunderstorm updrafts and fall to the ground.

Ball lightning appears during thunderstorms, taking the shape of glowing, electric orbs in the sky. It can appear in a variety...

A strong, downward wind caused by a localized column of air sinking rapidly, often resulting in damage similar to that caused...

A distinct layer in a body of water where the temperature changes rapidly with depth, separating warmer surface water from...

A bomb cyclone is a large mid-latitude storm that forms when a storm’s central pressure drops (i.e. “bombs out”), resulting...