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 type of low-altitude cloud that forms in uniform layers, often covering the entire sky and producing overcast conditions.
A low-pressure area with converging winds, rotating counterclockwise in the Northern Hemisphere and clockwise in the Southern...
A polar vortex is a circulating mass of air in the atmosphere, typically found in polar regions. This rotating air mass occurs...
A line on a weather map connecting points of equal atmospheric pressure, used to identify high and low-pressure systems.
In a severe storm, with a swirling motion in its left rear quadrant, a vertically rotating column of air, often seen with...
A mass of very cold, dry air that mostly originates over the Arctic Ocean.
A prefix used in cloud nomenclature to describe middle-altitude clouds that form between 6,500 and 20,000 feet, such as altostratus...
A small, intense downdraft that produces damaging winds at the surface, typically lasting a few minutes and often associated...
Cloud or rain droplets containing pollutants, such as oxides of sulfur and nitrogen, to make them acidic.
The formation of fog when warm and moist air passes over a cool or cold surface or, conversely, when cold air passes over...