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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

Jet streams are strong, fast-flowing air currents in the upper levels of the atmosphere. They form when warm air masses meet...

The occurrence of storms resulting from the horizontal advection of cold air at high levels or the horizontal advection of...

A thick cloud of tiny water droplets suspended in the atmosphere near the Earth's surface, significantly reducing visibility.

A periodic warming of sea surface temperatures in the central and eastern Pacific Ocean, significantly influencing global...

A tropical cyclone, also called a hurricane, is a severe tropical storm with wind speeds in excess of 74 mph. Known as a...

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 upward movement of air caused by a topographic barrier, such as a mountain, which can lead to cloud formation and precipitation.

A cold core high is a high-pressure system with cold air at its center. These systems are typically associated with clear...

A weather front where two air masses meet but neither is strong enough to move the other, often resulting in prolonged periods...

A tropical cyclone with sustained winds of at least 74 miles per hour, characterized by a central eye, strong winds, and...