What is Circulation?

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

A prefix used in cloud nomenclature to describe middle-altitude clouds that form between 6,500 and 20,000 feet, such as altostratus...

Occurs when centers of high pressure and/or low pressure set up over a region in such a way that they prevent other weather...

A thick cloud of tiny water droplets suspended in the atmosphere near the Earth's surface, significantly reducing visibility.

The term used for semi-stationary high-pressure centers such as the Azores and North Pacific Highs, which occur in the narrow...

Frozen drizzle is a dangerous type of frozen rain. It’s a light rain that falls in very fine drops, which freezes on contact...

An anvil is a cloud mostly composed of ice particles. Otherwise known as a cumulonimbus cloud, an anvil has reached the stratospheric...

A type of low-altitude cloud that forms in uniform layers, often covering the entire sky and producing overcast conditions.

The term 'cloudy' refers to weather conditions characterized by a significant amount of cloud cover in the sky. This may...

The heating of the Earth by the sun causes daily changes in both the direction and speed of the wind. During the day, ground...