Weather 1
Weather
Air Masses
Weather 2
Air Mass• A large body
of air with uniform temperature and moisture
Weather 3
Air Mass
• mP
• Maritime Polar
• Moist
• Cold
Weather 4
Air Mass
• cP
• Continental Polar
• Dry
• Cold
Weather 5
Air Mass
• cT
• Continental Tropical
• Dry
• Hot
Weather 6
Air Mass
• mT
• Maritime Tropical
• Moist
• Hot
Weather 7
Air Mass
• A
• Arctic
• Dry
• Cold
Weather 8
Fronts
• Where two unlike air masses meet
Weather 9
Cold Front• Boundary formed where a
cold air mass overtakes and lifts a warm air mass
Weather 10
Squall Line
• Long line of heavy thunderstorms
• May occur just ahead of a fast moving cold front
Weather 12
Warm Front• Boundary formed where a
warm air mass overtakes and rises over a cold air mass
Weather 13
Stationary Front
• Boundary between two air masses
• Neither one is displaced
Weather 14
Occluded Front • Formed where a fast
moving cold air mass overtakes and lifts a warm air mass, completely cutting it off from the ground
Weather 15
Polar Front• Boundary at
which cold polar air meets the warmer air of the middle latitudes
Weather 16
High-pressure Systems
• Spin outward and clockwise
Weather 17
Low-pressure Systems
• Spin inward and counter-clockwise
Weather 18
Wave Cyclone
• Large storm that develops along cold or stationary fronts, with winds that spiral in toward a central region of low air pressure
Weather 19
Anticyclone• Storm that spirals outward
from a high-pressure center
Weather 20
Hurricanes/Typhoon • A warm-core tropical cyclone• maximum winds greater than 64
knots (74 mph). • hurricane is used in the west. • typhoon is used for pacific
cyclones in the eastern hemisphere.
Weather 21
Hurricanes
• Low pressure system
• Feeds off
of warm
tropical
oceansHurricane Fran
Weather 22
Storm Surge • Unusual rise in sea level
accompanying a hurricane or other intense storm
Weather 23
Storm Surge
• Leading cause of death
• Cause of the most destruction
Weather 24
Camille Damage
Weather 25
Tornadoes
• Whirling funnel shaped cyclone
• Common on the great plains during spring
• Up to 300 mph winds
Weather 26
Study Guide• Air masses continental Polar• Maritime tropical • stationary front, cold front,
warm front, occluded front• Front, Wave Cyclone• High-pressure spin ?• Low-pressure systems spin ?• Tornado, hurricane
Weather 27
Study Guide
• Wave Cyclone