Dark blue cloudy sky

What is Trough?

An elongated area of relatively low atmospheric pressure, often associated with unsettled weather conditions like storms and rain.

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Glossary

A small, intense downdraft that produces damaging winds at the surface, typically lasting a few minutes and often associated...

A tropical cyclone with sustained winds of at least 74 miles per hour, characterized by a central eye, strong winds, and...

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

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

A weather warning means that a weather hazard is occurring, imminent, or likely. In other words, severe weather is happening...

A thin, white cloud layer that is intertwined or separate, arranged in regular order, and does not cast a shadow.

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 elongated area of relatively low atmospheric pressure, often associated with unsettled weather conditions like storms...

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

An instrument that continuously records atmospheric pressure over time. It uses a barometer to measure pressure and creates...