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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Frozen drizzle is a dangerous type of frozen rain. It’s a light rain that falls in very fine drops, which freezes on contact...
A rapidly rotating column of air extending from a thunderstorm to the ground, capable of causing significant damage.
A cold core low is a low-pressure system where the coldest temperatures are found near the center. These systems are often...
A mass of very cold, dry air that mostly originates over the Arctic Ocean.
A sudden electrostatic discharge during a thunderstorm between electrically charged regions of a cloud, between clouds, or...
Observation of the sky from the observer's location where there are no clouds, and there is no obstruction to visibility....
A polar vortex is a circulating mass of air in the atmosphere, typically found in polar regions. This rotating air mass occurs...
Coastal flooding occurs when water from the ocean, sea, or large lakes inundates land areas along the coast, usually due...
A cloud that develops from Cirrus, completely or partially covering the sky, creating a halo effect, thin, sheet-like, milky...
The term used for semi-stationary high-pressure centers such as the Azores and North Pacific Highs, which occur in the narrow...