Dark blue cloudy sky

What is Heat Index?

A measure of how hot it feels when relative humidity is combined with the actual air temperature, often referred to as the 'apparent temperature.'

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Glossary

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

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

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

Although it is also used for light winds, it is the general name given to the daily cyclical winds that occur mostly between...

A sudden and rapid flow of snow masses accumulated on the slopes of mountainous areas under the influence of gravity or a...

A scale for estimating wind speed based on observed conditions of the sea or land. It ranges from 0 (calm) to 12 (hurricane)...

A long, narrow region in the atmosphere that transport water vapor, like a river in the sky.

The names given to the winds blowing from the four cardinal directions (north, east, south, and west - N, E, S, W) on a compass.

The trapping of heat in the Earth's atmosphere due to greenhouse gases, such as carbon dioxide and methane, which allows...

Snow that rises to 8 feet or higher.