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 very cold high pressure that originates over the Arctic Ocean.

A scale for estimating wind speed based on observed conditions of the sea or land. It ranges from 0 (calm) to 12 (hurricane)...

The occurrence of storms resulting from the horizontal advection of cold air at high levels or the horizontal advection of...

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

The percentage of water vapor in the air relative to the maximum amount of water vapor the air can hold at a given temperature.

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

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

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

A thermodynamic change process in the system without any exchange of heat or transfer of energy between systems. This process...

The names given to the winds blowing from the four cardinal directions (north, east, south, and west - N, E, S, W) on a compass.