Did bunnies just attack that sailboat, or was it a narwhal playing with a school of fish? Are you going crazy, or are you just watching the clouds? See more »

We hear about humidity in just about every weather report on the nightly news. There are several different ways meteorologists measure humidity, but relative humidity is the most common measurement. What is relative humidity, though? Find out in this See more »

American Meteorological Society, a scientific, educational, and professional society of meteorologists and others interested in the atmospheric sciences. See more »

Atmosphere, the mass of gases surrounding a planet or any other celestial object. See more »

Blizzard, a blinding snowstorm with cold, high winds. In severe blizzards, the wind speed typically is more than 45 mph (72 km/h), the temperature below 10 F. See more »

Chinook, the American name for a warm, dry wind that blows down a mountainside. See more »

Climate, the average condition of the weather in an area for a period of years. See more »

Condensation, the formation of a liquid from a vapor or gas. It occurs in the formation of clouds and when cooled, water vapor turns into dew or rain. See more »

Dew Point, the temperature at which water vapor in air will begin to condense, that is, change into a liquid or solid. See more »

Fog, a cloud that occurs at the earth's surface. It usually consists of tiny water droplets suspended in the air, but in very cold conditions it may consist of ice particles. See more »