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...
A weather front where two air masses meet but neither is strong enough to move the other, often resulting in prolonged periods...
A term used to identify clouds with a base height below 6,000 feet in the observer's direction. Stratiform clouds consist...
The temperature at which air becomes saturated with moisture and water vapor begins to condense into liquid form, leading...
A very cold high pressure that originates over the Arctic Ocean.
A tropical cyclone, also called a hurricane, is a severe tropical storm with wind speeds in excess of 74 mph. Known as a...
The formation of fog when warm and moist air passes over a cool or cold surface or, conversely, when cold air passes over...
Thermodynamic changes occurring within a system without any exchange of heat with the surroundings. In the atmosphere, changes...
A line of severe thunderstorms that can form along or ahead of a cold front, often producing strong winds and heavy rain.
A long, narrow region in the atmosphere that transport water vapor, like a river in the sky.