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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Bright and dark rays with changing colors and contrast in the sky. These rays become visible due to the reflection of atmospheric...
A mass of very cold, dry air that mostly originates over the Arctic Ocean.
A drainage wind that flows downhill due to gravity, often associated with cold air descending from elevated regions.
A sudden electrostatic discharge during a thunderstorm between electrically charged regions of a cloud, between clouds, or...
A scale for estimating wind speed based on observed conditions of the sea or land. It ranges from 0 (calm) to 12 (hurricane)...
A thin, white cloud layer that is intertwined or separate, arranged in regular order, and does not cast a shadow.
A bomb cyclone is a large mid-latitude storm that forms when a storm’s central pressure drops (i.e. “bombs out”), resulting...
The jet stream forming the boundary between tropical air and sub-tropical air, characterized by isothermal compression and...
The expected rate of temperature decrease in an adiabatically rising air parcel when there is no heat exchange with the environment....
The state of the atmosphere when it contains the maximum amount of water vapor possible at a given temperature and pressure.