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Marano Weather #4

How do clouds and precipitation form? when air is cooled below its dew point and water vapor condenses into water droplets or ice crystals
condensation nuclei what the water vapor condesnses onto- salt, dust, or smoke
All clouds (do, do not) result in precipitation. do not
Why don't all clouds result in precipitation? water vapor or ice crystals must be heavy enough to fall
Clouds that cover large areas of sun and look like blankets of fog stratus
dark clouds usually resulting in continuous rain nimbostratus
puffy white clouds with flat bottoms that indicate fair weather cumulus
Cumulus clouds that can produce thunderstorms Cumulonimbus
Thin feathery white clouds found at high altitudes, forms when wind is strong, if they get thinker or lower they may indicate approaching bad weather Cirrus
any cloud that produces precipitation Nimbo/Nimbus
High clouds made of ice crystals classified by altitude cirro
middle clouds that can be made of both water and ice classified by altitude alto
low clouds made of water classified by altitude strato
precipitation water that falls from the air to the Earth- rain , snow , sleet or hail
rain liquid water that falls from clouds to the Earth, must get large enough to fall from the cloud
snow most common solid precipitation
sleet freezing rain that fall through layers of freezing air
hail solid precipitation that forms as balls or lumps of ice
rain gauge instrument that measures the amount of rainfall
air mass an area of the atmosphere where the characteristics of the air are the same
Air mass is represented on a map by two letter. The first is ___ and the second is _____. moisture, temperature
Air masses are determined by their _____ where the air came from source region
Maritime air mass- M- formed over water, air is ____ wet
Continental air mass formed over land, air is ____ dry
Arctic air mass (A), air is ____ cold
Polar air mass (P), air temperature is ____ relatively low
Tropical air mass (T), air temperature is _____ relatively high
Air masses are moved by _____ and _____ planetary winds and the jet stream
Acrtic and polar air masses are moved in what two directions? south and west over US
Tropical air masses are moved to the _____ and _____ by the southest wind belt between 30 and 60 degrees North north and east
Fronts area where two air masses meet
Cold front leading edge of cold air mass. Cold air forces the warm air upward
Cold air masses move (faster, slower) than warm air masses faster
Warm front a warm air mass follows a cold air mass. The warm lighter air rides over the top, cools and reaches its dew point and causes precipitation
Stationary front form where a cold air mass meets a warm air mass and neither moves
Occluded front when two cold air masses meet with a warm air mass in the middle and the warm air is pushed upwards
Frontal cyclones areas of high pressure move towards area of low pressure and are bent to the right due to Coriolis effect
cyclone- (high, low) pressure system in inward counterclockwise direction low
anticyclone- (high, low) pressure system in outward clockwise direction high
Created by: seagullq