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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A cloud that develops from Cirrus, completely or partially covering the sky, creating a halo effect, thin, sheet-like, milky...
The formation of ice crystals on surfaces when the temperature drops below freezing, typically overnight, causing potential...
Precipitation in the form of small balls or lumps of ice that form in thunderstorm updrafts and fall to the ground.
A sudden electrostatic discharge during a thunderstorm between electrically charged regions of a cloud, between clouds, or...
A deviation from the normal or expected value in atmospheric or climatic conditions, often used in meteorology to identify...
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 weather front where two air masses meet but neither is strong enough to move the other, often resulting in prolonged periods...
The reflectance rate of a surface, indicating the amount of electromagnetic radiation reflected from the surface. It depends...
A bomb cyclone is a large mid-latitude storm that forms when a storm’s central pressure drops (i.e. “bombs out”), resulting...
In a severe storm, with a swirling motion in its left rear quadrant, a vertically rotating column of air, often seen with...