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 term used for semi-stationary high-pressure centers such as the Azores and North Pacific Highs, which occur in the narrow...
A blizzard is a storm that lasts 3 hours or more, with persistent winds/frequent gusts of 35 mph or more along with significant...
A polar vortex is a circulating mass of air in the atmosphere, typically found in polar regions. This rotating air mass occurs...
Nimbostratus clouds are thick, dark, gray clouds associated with rainy and gloomy days that block the Sun. These clouds,...
A scale for estimating wind speed based on observed conditions of the sea or land. It ranges from 0 (calm) to 12 (hurricane)...
The expected rate of temperature decrease in an adiabatically rising air parcel when there is no heat exchange with the environment....
Cloud or rain droplets containing pollutants, such as oxides of sulfur and nitrogen, to make them acidic.
The state of the atmosphere when it contains the maximum amount of water vapor possible at a given temperature and pressure.
The term used for turbulence occurring in the absence of clouds or cloud-like elements in the visible area. It is often observed...
A mass of very cold, dry air that mostly originates over the Arctic Ocean.