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 small, intense downdraft that produces damaging winds at the surface, typically lasting a few minutes and often associated...
The mass of air surrounding the earth and bound to it more or less permanently by the earth's gravitational attraction.
An instrument that continuously records atmospheric pressure over time. It uses a barometer to measure pressure and creates...
The decrease in temperature with height in an adiabatically rising air parcel (lapse rate). For dry air, this value is 1...
Ice forms on the surface of highways in a very thin layer that is difficult to distinguish from the color of the asphalt...
A tropical cyclone with sustained winds of at least 74 miles per hour, characterized by a central eye, strong winds, and...
The percentage of water vapor in the air relative to the maximum amount of water vapor the air can hold at a given temperature.
A term used to identify clouds with a base height below 6,000 feet in the observer's direction. Stratiform clouds consist...
A periodic warming of sea surface temperatures in the central and eastern Pacific Ocean, significantly influencing global...
A mass of very cold, dry air that mostly originates over the Arctic Ocean.