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Flashcards in Exam 3 review guide Deck (26):
1

4 Mountain chains from east coast to west?

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

2

Which Mountain chain receives the most snow annually?

Sierra Nevada

3

3 Physical Reasons why Sierra Nevada gets Most snow?

-Proximity to Ocean
-Elevation
-Steepness of winward slope

4

Which mountain range receves the most rain annually?

Coast range

5

In the winter, why is the 0 degree isotherm higher in the west coast over san fransisco, than over Denver?

The pacific is relatively warm in winter, thus the freezing levels there are higher.

6

What is the name of the type of storms that produce heavy snow in Denver?

Upslopes

7

3 ways Santa Ana winds are different than Chinook Winds?

- Santa Anas blow from east to west, which is opposite the windflow of Chinooks

• Santa Anas are more frequent (events per year) than Chinooks

• Santa Anas are less intense (lower velocity) typically than Chinooks

8

Give 3 weather features that are required for Chinook winds to form.

• An inversion just above mtn top levels (say 600mb). This accelerates the flow, and directs it downward
• Strong surface PGF (high to west, low to east)
• Strong winds at mtn top level (say 700mb)

9

Give 3 factors that determine the temperature of air reaching the leeward base of a mountain in a mountain windstorm.

• Upstream air temperature
• Latent heat adds to air during ascent on windward side
• Adiabatic compression on leeward side

10

Tend to grow far from frontal boundaries

Airmass Storms

11

Always have a mesocyclone (rotating Updraft)

Supercells

12

Tend to occur to the south of a developing extratropical cyclone

Frontal Squall lines

13

Produce the most total Great Plains rainfall in midsummer

Mesoscale Convective Storm

14

Require a pre-existing large scale front to form

Frontal Squall Lines

15

They Do not require a pre-existing large scale front to form

-airmass storms
-Mesoscale Convective Storms

16

Tend to form at frontal boundary intersections

Supercells

17

Have a downdraft that is collected with the updraft

Airmass Storms

18

they Tend to grow in low wind shear environments

-Airmass Storms
-Mesocale Convective Storms

19

They typically have a line of sever storms followed by lighter rain

-Frontal Squall Lines
-Mesoscale Convective Storms

20

Is associated with derechos and bookend vortices

Mesoscale Convective Storms

21

They tend to be most prevelent around mid-may on the great plains

-Frontal Squall Lines
-Supercells

22

They tend to occue in the afternoon or early evening

-Airmass Storms
-Mesoscale Convective Storms
-Supercells
-Frontal Squall Lines

23

Tend to move from SW to NE over the great plains

-Supercells
-Frontal Squall Lines

24

Produce the worlds strongest tornados and largest hail

Supercells

25

Explain how vortex stretching can lead to more rapid rotation in a mesocyclone or tornado. What law governs this effect?

For vortex stretching, mass is constant so the conservation of angular momentum law become

26

Name the 3 theories that we went over in class on how supercells create tornadoes?

• Vortex breakdown of the mesocyclone
• Dynamic pipe effect (top-down approach)
• Stretching of a vortex tube introduced by the rear flank downdraft in the late stages of a
supercell’s updraft.