Dark blue cloudy sky

What is Stationary Front?

A weather front where two air masses meet but neither is strong enough to move the other, often resulting in prolonged periods of cloudiness and precipitation.

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Glossary

A term used to identify clouds with a base height below 6,000 feet in the observer's direction. Stratiform clouds consist...

Jet streams are strong, fast-flowing air currents in the upper levels of the atmosphere. They form when warm air masses meet...

In a severe storm, with a swirling motion in its left rear quadrant, a vertically rotating column of air, often seen with...

An instrument for measuring atmospheric pressure.

Condensation pressure deficit refers to the difference between the actual vapor pressure and the saturation vapor pressure...

A weather system refers to the movement of warm and cold air across the globe, usually in a recurring pattern. Systems can...

A mass of very cold, dry air that mostly originates over the Arctic Ocean.

The reflectance rate of a surface, indicating the amount of electromagnetic radiation reflected from the surface. It depends...

A cloud of irregular appearance, composed of irregular cloud fragments.

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