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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

Condensation pressure deficit refers to the difference between the actual vapor pressure and the saturation vapor pressure...

Condensation is the process by which water vapor in the air cools and changes into liquid water. This process is crucial...

A term used to identify clouds with a base height below 6,000 feet in the observer's direction. Stratiform clouds consist...

A deviation from the normal or expected value in atmospheric or climatic conditions, often used in meteorology to identify...

Considerable cloudiness refers to weather conditions where a large portion of the sky is covered with clouds, but some clear...

A strong wind typically ranging from 34 to 40 knots (39 to 46 miles per hour) and often associated with rough seas and stormy...

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

A body that has the property of absorbing all electromagnetic radiation falling on it, and therefore is the theoretical body...

Occurs when centers of high pressure and/or low pressure set up over a region in such a way that they prevent other weather...

Bright and dark rays with changing colors and contrast in the sky. These rays become visible due to the reflection of atmospheric...