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 condition in which the stratification of the atmosphere depends on both air temperature and pressure, and where surfaces...
The jet stream forming the boundary between tropical air and sub-tropical air, characterized by isothermal compression and...
The branch of science dealing with the laws of motion of air or other gases.
A cold front is the leading edge of a cold air mass that replaces a warmer air mass. It is typically associated with sudden...
The amount of radiation, heat, or light passing through or flowing from a unit area of a surface.
In a severe storm, with a swirling motion in its left rear quadrant, a vertically rotating column of air, often seen with...
Occurs when centers of high pressure and/or low pressure set up over a region in such a way that they prevent other weather...
The formation of ice crystals on surfaces when the temperature drops below freezing, typically overnight, causing potential...
An instrument that continuously records atmospheric pressure over time. It uses a barometer to measure pressure and creates...
Cloud or rain droplets containing pollutants, such as oxides of sulfur and nitrogen, to make them acidic.