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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The process by which a solid changes directly into a gas without first becoming a liquid, such as ice turning into water...
A condition in which the stratification of the atmosphere depends on both air temperature and pressure, and where surfaces...
Cloud condensation nuclei are tiny particles in the atmosphere, such as dust, salt, or pollutants, that provide surfaces...
Any form of water - liquid or solid - that falls from the atmosphere to the Earth's surface, including rain, snow, sleet,...
A polar vortex is a circulating mass of air in the atmosphere, typically found in polar regions. This rotating air mass occurs...
The heating of the Earth by the sun causes daily changes in both the direction and speed of the wind. During the day, ground...
Confluence refers to the area where two or more air streams or bodies of water meet and combine. In meteorology, it often...
The reflectance rate of a surface, indicating the amount of electromagnetic radiation reflected from the surface. It depends...
A cloud that develops from Cirrus, completely or partially covering the sky, creating a halo effect, thin, sheet-like, milky...
A very cold high pressure that originates over the Arctic Ocean.