Dark blue cloudy sky

What is Lightning?

A sudden electrostatic discharge during a thunderstorm between electrically charged regions of a cloud, between clouds, or between a cloud and the ground.

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Glossary

A strong wind typically ranging from 34 to 40 knots (39 to 46 miles per hour) and often associated with rough seas and stormy...

A measurement determined by the wave lengths and sea conditions caused by the effect of wind, and by the movement of tree...

A line of severe thunderstorms that can form along or ahead of a cold front, often producing strong winds and heavy rain.

The mass of air surrounding the earth and bound to it more or less permanently by the earth's gravitational attraction.

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

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

Local winds that blow from slopes to peaks as a result of the heating of the top slopes without being affected by general...

A tropical cyclone with sustained winds of at least 74 miles per hour, characterized by a central eye, strong winds, and...

A drainage wind that flows downhill due to gravity, often associated with cold air descending from elevated regions.