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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

A line of severe thunderstorms that can form along or ahead of a cold front, often producing strong winds and heavy rain.

Confluence refers to the area where two or more air streams or bodies of water meet and combine. In meteorology, it often...

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

Weather conditions are the components that comprise the state of the atmosphere. The six main weather conditions are temperature,...

Thermodynamic changes occurring within a system without any exchange of heat with the surroundings. In the atmosphere, changes...

An elongated area of relatively low atmospheric pressure, often associated with unsettled weather conditions like storms...

The large-scale movement of air that distributes heat and moisture around the Earth, influencing weather patterns and climatic...

A middle cloud type within the B family in the international cloud classification. These are shaded clouds that can be white...

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

A periodic cooling of sea surface temperatures in the central and eastern Pacific Ocean, often leading to altered global...