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

An instrument for measuring atmospheric pressure.

Perhaps you have come across them, maybe you are seeing them for the first time. These clouds, known as wave clouds, resemble...

A very cold high pressure that originates over the Arctic Ocean.

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

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

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

A drainage wind that flows downhill due to gravity, often associated with cold air descending from elevated regions.

Anticyclones are areas of high atmospheric pressure that bring hot, dry weather in the summer and cold fronts in the winter.

The formation of ice crystals on surfaces when the temperature drops below freezing, typically overnight, causing potential...