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 11

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