Storm clouds fill the sky above the grassy plains.
Rain and dull clouds, windy blue skies, cold snow, and sticky heat are very different conditions, yet they are all weather.
Weather Fronts
When a front passes over an area, it means a change in the weather. Many fronts cause weather events such as rain, thunderstorms, gusty winds and tornadoes.
NOAA weather forecast map
Learn about weather map symbols and how they are used to make predictions of the weather.
global map of clouds
Air moves around the planet in a consistent pattern, called atmospheric circulation. Learn how convection and the spinning of the Earth create the prevailing winds.
pressure gauge
How do we know what the pressure is? How do we know how it changes over time? Standing on the ground and looking up, it might not look like anything is there, especially if there are no clouds in the sky. But what you don’t see is air – lots of it. We live at the bottom of the atmosphere, and the weight of all the air above us is called air pressure.
Wind sock on pole
Wind is air moving from a place that has higher pressure to one that has lower pressure. Sometimes wind is just a light breeze and other times it is strong enough to blow the roofs off buildings.
The amount of water vapor in the air is called humidity.
The water cycle
Water can be in the atmosphere, on the land, in the ocean, and underground. It moves from place to place through the water cycle.
Weather Glossary
A glossary of common weather related words.
Weather Image Gallery

Photos, diagrams, and other images related to weather.

Weather Videos

Short video clips about weather - including weather measurements and several weather

weather games and simulations
Test your knowledge with one of our games or gain a deeper understanding of weather through a simulation.
How Weather Works Activities
Experience weather outside or investigate weather through data, graphs and maps. These activities range from simple explorations of snow, to more through analysis of climate change and weather.