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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

An anvil is a cloud mostly composed of ice particles. Otherwise known as a cumulonimbus cloud, an anvil has reached the stratospheric...

The scientific study of climate, focusing on the analysis of long-term weather patterns and trends over time.

The horizontal transport of any feature within the atmosphere due to the movement of air (wind). This includes phenomena...

The lowest level of a given cloud or cloud layer in the atmosphere, relative to the observer's position above the ground.

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

Meteorology is the scientific study of the atmosphere and weather processes. It involves observing, analyzing, and forecasting...

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

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

The term used for turbulence occurring in the absence of clouds or cloud-like elements in the visible area. It is often observed...

Cloud or rain droplets containing pollutants, such as oxides of sulfur and nitrogen, to make them acidic.