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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Cloud condensation nuclei are tiny particles in the atmosphere, such as dust, salt, or pollutants, that provide surfaces...
A polar vortex is a circulating mass of air in the atmosphere, typically found in polar regions. This rotating air mass occurs...
A towering cloud that often reaches great altitudes and is associated with thunderstorms, heavy rain, and sometimes severe...
The heating of the Earth by the sun causes daily changes in both the direction and speed of the wind. During the day, ground...
Any form of water - liquid or solid - that falls from the atmosphere to the Earth's surface, including rain, snow, sleet,...
A sudden electrostatic discharge during a thunderstorm between electrically charged regions of a cloud, between clouds, or...
An anvil is a cloud mostly composed of ice particles. Otherwise known as a cumulonimbus cloud, an anvil has reached the stratospheric...
Condensation pressure deficit refers to the difference between the actual vapor pressure and the saturation vapor pressure...
A weather front where two air masses meet but neither is strong enough to move the other, often resulting in prolonged periods...
A condition in which the stratification of the atmosphere depends on both air temperature and pressure, and where surfaces...