Chapter 8Weather

  Geosystems 6eAn Introduction to Physical Geography

Robert W. ChristophersonCharles 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 LiftingCold Fronts

Cold air forces warm air aloft400 km wide (250 mi)

Warm FrontsWarm air moves up and over cold air1000 km wide (600 mi)

Cold Front

Figure 8.11

Cold Frontand

Squall Line

Figure 8.12

Warm Front

Figure 8.13

Life Cycle of a Midlatitude Cyclone CyclogenesisOpen stageOccluded stage

Occluded frontStationary front

Dissolving stageStorm 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 WeatherThunderstorms  Tornadoes  Tropical Cyclones  

Thunderstorms

Figure 8.19

Thunderstorms

Figure 8.20

Hailstones

Figure 8.21

Thunderstorms

Figure 8.22

Mesocyclone andTornado

Figure 8.23

Tornadoes

Figure 8.23 Figure 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 6eAn Introduction to Physical Geography

Robert W. ChristophersonCharles E. Thomsen