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 trapping of heat in the Earth's atmosphere due to greenhouse gases, such as carbon dioxide and methane, which allows...
A cloud of irregular appearance, composed of irregular cloud fragments.
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 rapidly rotating column of air extending from a thunderstorm to the ground, capable of causing significant damage.
A very cold high pressure that originates over the Arctic Ocean.
The horizontal transport of any feature within the atmosphere due to the movement of air (wind). This includes phenomena...
A polar vortex is a circulating mass of air in the atmosphere, typically found in polar regions. This rotating air mass occurs...
An instrument that continuously records atmospheric pressure over time. It uses a barometer to measure pressure and creates...
The state of the atmosphere when it contains the maximum amount of water vapor possible at a given temperature and pressure.