Dark blue cloudy sky

What is Cold Front?

A cold front is the leading edge of a cold air mass that replaces a warmer air mass. It is typically associated with sudden drops in temperature, thunderstorms, and heavy rain as the colder air forces the warmer air upward.

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Glossary

Observation of the sky from the observer's location where there are no clouds, and there is no obstruction to visibility....

Ice forms on the surface of highways in a very thin layer that is difficult to distinguish from the color of the asphalt...

Any form of water - liquid or solid - that falls from the atmosphere to the Earth's surface, including rain, snow, sleet,...

A polar vortex is a circulating mass of air in the atmosphere, typically found in polar regions. This rotating air mass occurs...

A type of cloud consisting mostly of small particles such as ice particles.

A bomb cyclone is a large mid-latitude storm that forms when a storm’s central pressure drops (i.e. “bombs out”), resulting...

Cloud condensation nuclei are tiny particles in the atmosphere, such as dust, salt, or pollutants, that provide surfaces...

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 periodic warming of sea surface temperatures in the central and eastern Pacific Ocean, significantly influencing global...

Large, fluffy white clouds with flat bases, typically indicating fair weather, though they can develop into storm clouds...