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What is Weather?

Weather is the day-to-day meteorological conditions that happen in our atmosphere. Weather can change within minutes, which is why it can be difficult to forecast.

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Glossary

A weather system refers to the movement of warm and cold air across the globe, usually in a recurring pattern. Systems can...

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

A term used to identify clouds with a base height below 6,000 feet in the observer's direction. Stratiform clouds consist...

A thin, white cloud layer that is intertwined or separate, arranged in regular order, and does not cast a shadow.

A weather warning means that a weather hazard is occurring, imminent, or likely. In other words, severe weather is happening...

The amount of radiation, heat, or light passing through or flowing from a unit area of a surface.

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

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

A cold core low is a low-pressure system where the coldest temperatures are found near the center. These systems are often...