Chapter 8 Weather Geosystems 6e An Introduction to Physical Geography Robert W. Christopherson Charles E. Thomsen

Weather Air Masses Atmospheric Lifting Mechanisms Midlatitude Cyclonic Systems Violent Weather

Air Masses Air Masses Affecting North America Air Mass Modification

Air Masses Figure 8.2

Atmospheric Lifting Mechanisms Convergent Lifting Convectional Lifting Orographic Lifting Frontal Lifting (Cold and Warm Fronts)

Lake Effect Snowbelts Figure 8.5

Atmospheric Lifting Mechanisms Figure 8.6

Local Heating and Convection Figure 8.7

Convection over Florida Figure 8.8

Orographic Precipitation Figure 8.9

Orographic Patterns Figure 8.10

Frontal Lifting Cold Fronts Cold air forces warm air aloft 400 km wide (250 mi) Warm Fronts Warm air moves up and over cold air 1000 km wide (600 mi)

Cold Front Figure 8.11

Cold Front and Squall Line Figure 8.12

Warm Front Figure 8.13

Life Cycle of a Midlatitude Cyclone Cyclogenesis Open stage Occluded stage Occluded front Stationary front Dissolving stage Storm tracks

Midlatitude Cyclone Figure 8.14

Midlatitude Cyclone Figure 8.15

Average and Actual Storm Tracks Figure 8.16

Weather Forecasting Figure 8.17

Violent Weather Thunderstorms Tornadoes Tropical Cyclones

Thunderstorms Figure 8.19

Thunderstorms Figure 8.20

Hailstones Figure 8.21

Thunderstorms Figure 8.22

Mesocyclone and Tornado Figure 8.23

Tornadoes Figure 8.23Figure 8.24

Tornado Damage Figure 8.23

Tornadoes Figure 8.25

Easterly Wave Figure 8.26

Tropical Cyclones Figure 8.27

Canadian and Brazilian Hurricanes Figure 8.28

Hurricane Isabel, Cape Hatteras and the Outer Banks Figure 8.29

Profile of a Hurricane Figure 8.30

1995 Atlantic Storm Season Figure FS 8.1.1

1995 Atlantic Storm Season Figure FS 8.1.2

Hurricane Andrew Figure 8.31

End of Chapter 8 Geosystems 6e An Introduction to Physical Geography Robert W. Christopherson Charles E. Thomsen