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Severe Weather --for those who know enough to come in out of the rain.

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Presentation on theme: "Severe Weather --for those who know enough to come in out of the rain."— Presentation transcript:

1 Severe Weather --for those who know enough to come in out of the rain.

2 Flash flooding

3 Tornado

4 High winds

5 Lightning

6 Thunderstorm

7 Hurricane

8 Winter storms

9 Over 500 Americans die each year due to weather related incidents. Billions of dollars of damage is done to American homes, farms, cities, and businesses

10 Rule 1 Warm air tends to…

11 Rule 1 Warm air tends to rise! Just like warm water and warm magma Convective uplift—it is forced up by the cooler (and therefore more dense) fluid around it.

12 Four reasons air might rise:

13 Four reasons air might rise: 1. Convective uplift 2. Orographic uplift 3. Frontal wedging 4. Convergence

14 Four reasons air might rise: 1. Convective uplift --less dense air is forced up by surrounding air 2. Orographic uplift --if the land surface rises, the air has to rise 3. Frontal wedging --an air mass forces its way under another mass 4. Convergence --when two air masses come together, the only way to go is up

15 Air Masses --like water masses. A body of air with its own temperature and humidity

16 Air Masses --like water masses. A body of air with its own temperature and humidity Continental (dry) or Maritime (humid) Polar (cold) or Tropical (warm)

17 Front-where two air masses meet Cold air mass (moving southeast) Warm air mass Cold air mass Warm air mass (moving east)

18 Fronts

19 When a front advances…

20 …one air mass goes over the other. The warmer air mass usually goes over the other.

21 Clouds form…

22 …when an air mass cools enough to allow the water vapor to condense. When a warm air mass rises, it starts to cool due to expansion—air pressure is less up there Cold Air mass 

23 Clouds form… …or they don’t. Water vapor is clear and colorless-- Air has water vapor. Clouds have water droplets.

24 Clouds form… …or they don’t. Water vapor is clear and colorless-- Air has water vapor. Clouds have water droplets. Condensation nuclei make it more likely that water vapor can condense into water droplets

25 Cumulus clouds make thunderstorms

26 Cumulonimbus clouds (raining)

27 Air movement in a thunderstorm

28 Types of clouds Basically—three types are important: Stratus Cumulus and Cirrus

29 Types of clouds Basically—three types are important: Stratus Cumulus and Cirrus means “a layer” means “heaped” means “wispy”

30 Types of clouds Basically—three types are important: Stratus Cumulus and Cirrus Nimbus = “raining” Alto = “high” Combination types take both names

31 Types of clouds

32

33 Cirrus clouds

34 Stratus clouds

35 Cumulus clouds

36 Cumulonimbus

37 Complete numbskull

38 Above the clouds

39 Weather occurs in the troposphere

40 Above the clouds Air cools as you get higher

41 Above the clouds Top of Mt. Everest

42 Above the clouds The tropopause is the top of the troposphere

43 Above the clouds Highest clouds

44 Above the clouds Passenger jets fly here

45 Above the clouds Propeller plane altitude record

46 Above the clouds Jet plane altitude record

47 Above the clouds Air doesn’t get cooler with altitude in the stratosphere

48 Above the clouds Ozone layer

49 Above the clouds Cooling with altitude, again

50 Above the clouds NASA gives astronaut’s wings above the mesopause

51 Above the clouds Northern lights


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