Form when two different large air masses meet and usually bring changes in the weather.
fronts
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Marked on weather maps as a blue line with triangles on it.
cold front
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The capital letter H stands for this on a weather map.
high pressure center
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The name given to a scientist that studies weather.
meteorologist
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An air mass that is dry and forms over land.
continental air mass
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A type of front made of cold, dense air. Rain, snow, thunderstorms and sometimes tornadoes are caused by this front. Usually, the precipitation does not last very long.
cold front
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Marked on a weather map as a red line with half circles on it.
warm front
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A capital letter L stands for this on a weather map.
low pressure center
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Carries weather instruments as far up as the stratosphere.
weather balloons
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An air mass that forms over the polar regions and is cold.
polar air mass
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The front that forms when two air masses meet and neither one takes over. Often causes many cloudy days to occur in a row.
stationary front
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Marked on a weather map as a blue line with blue triangles on one side and red half circles on the other side.
stationary front
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Represented by a small circle that is completely white (not colored in).
clear skies
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An air mass that forms over the tropics and is warm.
tropical air mass
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The type of front formed when a large mass of warm air takes over the cooler air mass. Usually produce rain, fog, or snow that lis light but steady.
warm front
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The type of weather forecast that is within the next 5 days.
short-range weather forecast
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Lines that connect areas with the same air pressure on a map.
isobars
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Often represented by asterisks or stars on a weather map.
snow
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The layer of the atmosphere where weather satellites are located.
exosphere
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An air mass that is wet and forms over water.
maritime air mass
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The type of front that develops when two cool air masses merge, forcing the warm air to rise and become trapped. Usually brings wind and precipitation.
occluded front
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Marked on the weather map as a purple line with half circles and triangles on the same side.
occluded front
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Lines that connect areas with equal temperature on a weather map.
isotherms
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States that a small change or disturbance, such as a butterfly flapping its wings, may play a part in the weather outcomes in the future.
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