What is Warning?
A weather warning means that a weather hazard is occurring, imminent, or likely. In other words, severe weather is happening now, developing as we speak, and is minutes away. This weather hazard poses a threat to life and property.
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The percentage of water vapor in the air relative to the maximum amount of water vapor the air can hold at a given temperature.
A very cold high pressure that originates over the Arctic Ocean.
The formation of ice crystals on surfaces when the temperature drops below freezing, typically overnight, causing potential...
A sudden electrostatic discharge during a thunderstorm between electrically charged regions of a cloud, between clouds, or...
A cloud that develops from Cirrus, completely or partially covering the sky, creating a halo effect, thin, sheet-like, milky...
A continental air mass is a large body of air that forms over land, characterized by dry conditions due to the lack of moisture...
An anvil is a cloud mostly composed of ice particles. Otherwise known as a cumulonimbus cloud, an anvil has reached the stratospheric...
A type of low-altitude cloud that forms in uniform layers, often covering the entire sky and producing overcast conditions.
The lowest level of a given cloud or cloud layer in the atmosphere, relative to the observer's position above the ground.
A polar vortex is a circulating mass of air in the atmosphere, typically found in polar regions. This rotating air mass occurs...