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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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Glossary

Nor'easter is a meteorological event commonly observed in the Northeastern United States and typically occurs during the...

A weather front where two air masses meet but neither is strong enough to move the other, often resulting in prolonged periods...

Nimbostratus clouds are thick, dark, gray clouds associated with rainy and gloomy days that block the Sun. These clouds,...

A rapidly rotating column of air extending from a thunderstorm to the ground, capable of causing significant damage.

A strong, downward wind caused by a localized column of air sinking rapidly, often resulting in damage similar to that caused...

A periodic cooling of sea surface temperatures in the central and eastern Pacific Ocean, often leading to altered global...

Convection is the vertical movement of air caused by temperature differences, where warm air rises and cool air sinks. It...

The upward movement of air caused by a topographic barrier, such as a mountain, which can lead to cloud formation and precipitation.

The heating of the Earth by the sun causes daily changes in both the direction and speed of the wind. During the day, ground...

Frozen drizzle is a dangerous type of frozen rain. It’s a light rain that falls in very fine drops, which freezes on contact...