Fog

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The following questions were answered by meteorologists Barbara McNaught Watson and Al Peterlin.

Q: Why does a thin layer of fog form over ponds and rivers in the early morning hours during the fall in New England?
A: Bodies of water, such as lakes, ponds, and rivers, are much slower to cool down than land areas are. During clear fall nights, the warmth of the land escapes into space. As the air over the land cools, it will drift over the warmer pond. A thin layer of air above the pond is warmed by the pond water. Water evaporates from the pond's surface into this thin layer. The thin, warm, moist layer of air over the pond then mixes with the cooler air from the land. As it cools, condensation occurs and a fog forms. It looks like steam rising off the water, hence the name "steam fog." In the spring, the ponds are usually colder than the surrounding land. Just as they are slow to cool, they are also slow to warm. (Barbara McNaught Watson)

Q: Why is fog down so low?
A: Fog can be thought of as a low-down cloud hugging the ground in valleys and along rivers and streams. A cloud is nothing but fog with an "attitude" the attitude is altitude (height). A stiff wind can lift a fog away from earth, becoming a cloud, but generally fog evaporates in the morning sun. (Al Peterlin)

Escaping the Storm
Learn about the annual hurricane season, which typically spans from June until November every year.

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Go inside the hurricane and find out what meteorologists mean when they talk about the eye of the storm.

Activity Plan 5-6: Meterologists
Children will learn about weather words and the work of meteorologists as they begin to observe, describe, record, and predict the weather in this ready-to-use teaching idea for five- and six-year-olds. Activity: Science

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