admin / January 25, 2018
Question Answer
Air masses move from areas of _____ pressure to areas of ____ pressure. high to low
The ____ _____ is the deflection of wind due to the earth's rotation. Coriolis effect
Air masses are classified according to their _. source regions
_______ air masses tend to be moist. maritime
_ air masses tend to be dry. continental
The earth's rotation creates 3 major wind cells: trade, prevailing, and polar
Trade winds blow from _ to _. east; west
Prevailing ( _______) blow from _______ to ______. westerlies; west to east
Polar ( ______ )blow __ to _. easterlies; east to west
The USA is infuence by the ___ winds. prevailing
USA is infuenced by _ air masses in _ different regions. 7;7
All continental air is _. dry
All maritime is _. moist
Tropical are _. warm
Polar are _. cold
Sign for Polar Canadian cP
Polar Canadian moves _. southeast
Polar Canadian brings what to the US. brings cools masses to northern US in the summer and cold, dry air in the winter
Sign for Polar Pacific mP
Polar Pacific brings what to the US. very moist but extremely cold; makes Pacific coast snowy and rainy- this air mass loses its moisture as it moves across the Sierra Nevada and Rockies
Polar Atlantic Sign mP
Polar Atlantic forms over _. north Atlantic
Polar Atlantic affects US by _. affects New England with cold cloudy weather in winter and foggy, cool summers
Sign for Tropical continental. cT
Tropical continental forms over -. Mexico affects the Southwest; brings clear, dry, hot weather
Tropical gulf sign. mT
Describe Tropical gulf. forms over Gulf of Mexico- brings warm moist air to the US southeast summers are moist and hot, winters are mild and cloudy
Sign of Tropical Atlantic. mT
Describe the Tropical Atlantic. the same as Tropical gulf
Sign of Tropical Pacific. mT
Describe the Tropical Pacific. forms over the warmer Pacific- barely reaches the Pacific coast except during an El Nino when the warm moist air drifts closer to the Cali
What happens when in the mid-west, the warm moist air of the tropical gulf meets the dry cold air of the Polar Canadian when two opposite air masses meet: area is called tornado alley because of the violent storms that trigger tornadoes
Hurricanes which form in the tropics off the coast of Africa ride this path of the Tropical Atlantic bringing hurricanes to the ________. southeastern USA
When air masses meet, ________ usually keep the air masses separated. temperture differences
The air of a cool air mass is _, and does not mix with the less _ air of a warm air mass. dense
indefinite boundry between two air masses front
cold front symbol
the weather front was named because of the _ of air where two air masses meet battle
symbol points in the direction where -. the air is moving
cold air rushes in and _ warm air lifts
Warm moist air rises quickly to form _. clouds
Storms along a cold front are _ but _. short; violent
A squall line forms along a _. cold front
long line of heavy thunderstorms that may advance just ahead of a fast moving cold front squall line
warm front symbol
Slope of rising air is _ so clouds form _ over several hours. gradual, gradually
Clouds form _ _ of the appearing warm air. far ahead
What precedes a warm front? a distinct pattern of clouds
pattern of clouds: cirrus- cirrostratus- altostratus- stratus- nimbostratus
boundary formed where a cold air mass overtakes and lifts a warm air mass cold front
boundary formed where a warm air mass overtakes and rises above a cold air mass warm front
boundary formed where two air masses meet and neither is displaced stationary front
boundary formed where a fast moving cold air mass overtakes and lifts a warm air mass completely cutting it off from the ground occluded front
boundary formed where cold polar air meets the warmer air of the middle lats polar front
Cold air masses produce _ pressure areas. high
Cold air is heavy, so it is associated with a _ pressured area. high
Low pressure = warm air
fast moving cold front that overtakes warm front completely off the ground and the cold front then meets the cold front that was ahead of the lifted warm front and 2 cold air fronts meet and hold the warm air horizontally above them occluded front
when temperatures of 2 air masses is very similar, neither can displace the other and weather is like a warm front and typically stays the same stationary front
cap of cold air that is over the earth's polar region polar front
Polar front sinks toward the _ latitudes and circles the earth between _ to _ degrees latitude in both hemispheres middle; 40-60
In winter the air is colder and ___ and sinks farther _ toward the equator. heavier; south
In winter the polar front averages as far south as ___ in the USA. Florida
In summer, the air is not as _ so it retreats farther north. dense
In summer, the cold front is typically _ of the Great Lakes. north
high speed western river of air which separates the polar front from the warmer southern air jet stream
The jet stream travels _______ than the surrounding air. faster
cold front sign
warm front sign
occluded front sign
stationary front sign
______ form within a front. Waves
The waves within a front act like __ containing the air mass within its walls. barrier
_ _ is a very large body of air which blows in a circular path around a warm moist low pressure area in thhe center Wave cyclone
Winds circulate ______ in a ____ direction when in a wave cyclone. inward; counter clockwise
Warm moist air trapped in the middle begins to rise, _ causes clouds and storms to occur. condensation
So, low pressure areas are _ and _. rainy and cloudy
anti means _ or _. against or opposite
anti cyclones are waves of air moving in _ direction around a high pressure area. an outward
High pressure consists of cold, _ air we cannot compress it. dense
High pressure areas are associated with _ weather since sinking cold air has no _ factor. fair; condensation
Anticyclone winds move in a _ direction. clockwise
rates the intensity of a hurricane Saffir – Simpson scale
Hurricanes develop in _. doldrums at the equator
A hurricane is a wave cycle moving in a _ _ direction around a low pressure area. counter clockwise
Hurricanes are areas of low pressure with rapid _. evaporation
_ _ _ in the doldrums evaporate quickly. Warm ocean water
Latent heat is produced by _ _ and _ gives the storm power. rapid evaporation; condensation
As long as a hurricane is over water, _ intensifies the storm. evaporation
Over land, the lack of moisture causes the storm to _ _. die out
A hurricane affects a _ area. large
The higher tides along the coast called _ _,causes the most damage during a hurricane. storm surges
Hurricanes in the Atlantic were named by the natives of the Carribean from the word- Hurakean which means evil spirit in the Myan language
Pacific hurricane typhoon
smallest shortest most violent storm tornado
measures the intensity of a tornado Fujita scale
Tornado forms when a _. thunderstorm meets high altitude horizontal winds which cause it to spin
The result of a tornado forming is _. storm begins to rotate in the upper atmosphere
A tornado is a _ shaped cloud. funnel
A tornado watch suggests that the weather conditions are _______. favorable for a tornado.
A tornado warning is one that announces that a ________. tornado has been spotted
When do El Ninos occur? They occur when the easterly trade winds over the central and western pacific ocean weaken and that allows the wet moist air to go back eastward

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