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Weather Fronts

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the area where two different air masses meet

Air masses that form from different areas do not mix because

there are density differences between the two masses

Fronts occur in which latitudes

the middle latitudes where there are both cold and warm air masses.

Cold Front

Air moves under the less dense warm air and pushes it up.

What kind of weather will a cold front bring?

thunderstorms, heavy rain and snow

What kind of weather usually follows a cold front?

cooler weather because the warm air is pushed away from the earth’s surface

Warm Front

warm, less dense air moves over cold dense air and gradually replaces the cold air

What kind of weather do warm fronts bring?

drizzly rain

What kind of weather usually follows a warm front?

clear and warm

Occluded front

a warm air mass is caught between two colder air masses. The colder air moves under the warmer air pushing it up and then moves forward until it meets a mass that is warmer and pushes it up too.

What kind of weather do occluded fronts bring?

cool temperatures and large amounts of rain and snow

Stationary Front

a cold air mass meets a warm air mass but nothing happens because the cold air mass does not have enough force to push the warm mass up.

What kind of weather does a stationary front bring?

same as a warm front, drizzly rain

Symbol for cold front

Symbol for warm front

Symbol for stationary front

Symbol for occluded front


maritime polar air mass (originated over water in a polar region)


maritime tropical air mass (originated over water in a tropical region)


continental polar (originated over land in a polar region)


continental tropical (originated over land in a tropical region

a maritime polar air mass will be

moist and cool

a continental polar air mass will be

dry and cold

a maritime tropical air mass will be

moist and warm

a continental tropical air mass will be

dry and hot

weather vane

measures wind direction


used to measure wind speed


used to measure air pressure


one who studies the science of weather and weather conditions; reports and forecasts weather conditions


the amount of water vapor in the air

air pressure increases as

altitude increases

what creates wind?

differences in air pressure

warm, less dense air rises creating

low pressure zones

cold, more dense air sinks creating

high pressure zones

Differences in air pressure is caused by

the unequal heating of the Earth

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