Dark blue cloudy sky

What is Relative Humidity?

The percentage of water vapor in the air relative to the maximum amount of water vapor the air can hold at a given temperature.

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Glossary

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

Weather is the day-to-day meteorological conditions that happen in our atmosphere. Weather can change within minutes, which...

A weather watch means there is a risk of weather hazards in the near future, which could pose a threat to life/property....

The occurrence of storms resulting from the horizontal advection of cold air at high levels or the horizontal advection of...

A blizzard is a storm that lasts 3 hours or more, with persistent winds/frequent gusts of 35 mph or more along with significant...

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

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

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

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

Local winds that blow from slopes to peaks as a result of the heating of the top slopes without being affected by general...