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20 Cards in this Set
- Front
- Back
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Weather
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the condition of theatmosphere at a certain time and place
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Temperature
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how warm the air is
fahrenheit and celsius |
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Rain gauge
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measures precipitation (rain, sleet, snow, hail)
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Wind Vane and Anemometer
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measure wind speed and direction
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Barometer
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measures air pressure (the weight of the air)
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Clouds
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1. masses of tiny water droplets
2. clouds for when water vapor in the air cools and condenses around tiny pieces of dust in the air. |
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Stratus
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low, sheetlike gray clouds that bring rain sometimes
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Cumulus
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puffy, fair-weather cloud
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Cumulonimbus
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large thunderhead clouds that bring thunderstorms
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Cirrus
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wispy, high-level clouds that are associated with fair weather and approaching rain.
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Air Mass
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a large body of air with about the same temperature and humidity, or moisture, throughout
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Front
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where two air masses meet
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Cold Front
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cold air mass bumps against a warm air mass, bringing strong storms (thunderstorms or snowstorms). Causes a drop in temperature
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Warm Front
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a warm air mass meets a colder air mass and rises over it. Often brings rain, stratus clouds, and an increase in temperature.
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Stationary Front
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two air masses meet and stop moving; bringing clouds and precipitation that often lasts several days
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Prevailing Westerlies
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the global winds that affect the US - blow form West to East
Weather pattern most influences the weather in NC Winds deliver cold air to NC |
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Jet Stream
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an air current that flows from west to east
when the jet stream dips south, it brings cold arctic air down into the US When the jet stream bends north, it carries warm air from the south |
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Gulf Stream
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a warm ocean current in the Atlantic Ocean that carries warm waters out across the Atlantic Ocean towards the north; keeps weather along the coast mild
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El Nino
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the unusual warming of surface water in the Pacific Ocean
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La Nina
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the unusual cooling of surface water in the Pacific Ocean
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