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Flashcards in Chapter 16 (PPT) Deck (20):
1

Why do we care about mountain snow storms?

-Water Supply
-Hydroelectric Power
-Transportation Problems
-Avalanches
-Tourism

2

How much of the power generated in the west is Hydroelectric?

1/3 of power generated in the West is hydroelectric

3

Surface Hoar?

Frost on snow (Is also a real danger in CO. Tend to form cold, moist, windless nights.)

4

Can 'Surface Hoar's' be hidden by fallen snow, that weaken the layer, and slide?

Yes

5

How does the mean annual snowfall change as you move from south to north in the great plains?

It increases from south to north

6

What factors control the annual snowfall on the great plains?

Latitude and temperature (Also, blizzards tend to dump more snow on N. plains)

7

Does mean annual snowfall change smoothly from south to north in the Western US?

No, it does not

8

What factors control the annual snowfall in the Western US?

Elevation and mountains! their location, height, and steepness (Better lift)

9

How does the lifting air over mountains compare to the lifting of air along a front?

Values are comparable between leading edge of front and in mountains

10

Why are precipitation amounts often larger in the mountains then along a front?

Because fronts, and their associated lifting, move horizontally in time. The lifting over the mountains is stationary, thus the snow is produced continuously over the mountains

11

Orographic Lifting?

Air is forced to rise as it encounters a mountain

12

Windward side?

The upward side of the mountain

13

Leeward side

The downwind side of a mountain

14

What mountains does air coming from the pacific ocean encounter in the Western US?

-Coast Range
-Sierra Nevada
-Wasatch Range
-Rocky Mountains

15

What states are the Cacades in?

Washington, and Oregon

16

What state is the Sierra Nevada in?

California

17

What state is the Wasatch in?

The Idaho

18

What states is the Rocky Mountains in?

Montana, Wyoming, Colorado

19

What are the 2 limitations of Radar in mountains?

- Reflectivity and snowfall rates arent accurate because ice crystals are different shapes and sizes

-Mountains block radar beams

20

Upslope storm?

A winter storm that occurs along the eastern slope of the Rocky Mountains when the low level winds have an easterly component