Weather

Question 1

The atmosphere is made up of what?

Answer 1

78 % Nitrogen, 21 % Oxygen, and 1% other

Question 2

How high does the Troposphere extend?

Answer 2

Up to 20,000 feet over the northern and southern poles, 48,000 over the equatorial regions.

Question 3

In the Troposphere what is the Temperature and pressure decrease rate?

Answer 3

Temp. 2 for every 1,000

Pres. 1 in. per 1,000 feet gained

Question 4

Where is the tropopause?

Answer 4

Boundary layer above the troposphere.

Question 5

How high is the stratosphere?

Answer 5

Above the Tropopause up to 160,000 feet.

Question 6

What is standard level pressure and temp.?

Answer 6

29.92 and 15 degrees C.

Question 7

What is the conditions for Low Level Wind Shear?

Answer 7

Directional wind changes of 180 degrees and speed changes of 50 knots or more.

Question 8

What is a micro burst?

Answer 8

Occurs in a space of less than one mile horizontally and within 1,000 feet vertically. Life span of about 15 min. produce down drafts up to 6,000 per minute.

Question 9

What is the dry adiabatic lapse rate? (unsaturated air)

Answer 9

3 degrees C per 1,000 feet

Question 10

Moist Adiabatic lapse rate?

Answer 10

1.1 to 2.8 degrees C per 1,000 feet

Question 11

What are the three states that water can be present in the atmosphere?

Answer 11

Liquid, Solid, Gaseous

Question 12

What is humidity?

Answer 12

Refers to the amount of water vapor present in the atmosphere at a given time.

Question 13

What is dew point?

Answer 13

Is the temperature at which the air can hold no more moisture.

Question 14

What are the 4 methods that air can reach its saturation point?

Answer 14

1. when warm air moves over a cold surface, the air temp. drops and reaches saturation.
2. Cold air and warm air mix.
3. Air cools at night through contact with the cooler ground
4. air is lifted or is forced upward in the atmosphere

Question 15

What is fog?

Answer 15

A cloud that begins within 50 feet of the surface.

Question 16

Radiation Fog?

Answer 16

Ground cools rapidly and the surrounding air reaches saturation. If thicker than 20 feet is known as ground fog.

Question 17

Advection Fog

Answer 17

Same as radiation fog, but with a wind up to 15 knots.

Question 18

Up Slope Fog

Answer 18

When moist, stable air is forced up sloping land features like a mountain range.

Question 19

Steam fog

Answer 19

Cold dry air, moves over warm water. Low level turbulence and icing are commonly associated with steam fog.

Question 20

Ice Fog

Answer 20

Cold weather when the temp. is much below freezing and water vapor forms directly into crystals. Usually -25 degrees F or colder

Question 21

What is needed for clouds to form?

Answer 21

Adequate water vapor and condensation nuclei, as well as a method by which air can be cooled.

Question 22

What are cloud types determined by?

Answer 22

Height, Shape and Behavior.

Question 23

They are classified by their height bases as what?

Answer 23

Low, Middle, High, as well as clouds with vertical development.

Question 24

Low clouds

Answer 24

Earths surface up to 6,500 feet.

Question 25

What three clouds are normally associated with Low clouds?

Answer 25

Stratus, Stratocumulus, and Nimbostratus, fog is also classified as low cloud.

Question 26

Middle Clouds

Answer 26

6,500 feet to 20,000 feet

Question 27

What clouds are included in Middle Clouds?

Answer 27

Altostratus and altocumulus

Question 28

High Clouds

Answer 28

Above 20,000 feet and usually form in stable air

Question 29

Types of high clouds

Answer 29

Cirrus, Cirrostratus and Cirrocumulus

Question 30

What are the three stages of a thunderstorm?

Answer 30

Cumulus Stage, Mature Stage, Dissipating Stage

Question 31

Cumulus Stage of a thunderstorm

Answer 31

Lifting action begins

Question 32

Mature Stage

Answer 32

Reached within 15 mins. Most violent period in a thunderstorms life.

Question 33

Dissipating Stage

Answer 33

Anvil-like shape begins the dissipating stage, downdrafts spread out and replace updrafts.

Question 34

How many miles should you circumnavigate a thunderstorm?

Answer 34

20 miles.

Question 35

What is visibility?

Answer 35

the greatest horizontal distance at which prominent objects can be viewed with the naked eye.

Question 36

How is a drizzle classified?

Answer 36

Smaller than .02 inches in diameter.

Question 37

Verga

Answer 37

Rain that falls through the atmosphere bur evaporates prior to striking the ground.

Question 38

What are the four types of fronts?

Answer 38

Warm, Cold, Stationary, and Occluded

Question 39

Warm Front

Answer 39

Warm mass of air advances and replaces a body of colder air. Move slowly 10 to 25 miles per hour. Precipitation is probable, poor visibility, Barometric pressure falls till front passes.

Question 40

What happens during the passing of a warm front?

Answer 40

Stratiform clouds are visible and drizzle may be falling. Poor visibility, steady rise in temp.

Question 41

After the passage of a warm front?

Answer 41

Stratocumulus clouds predominate and rain showers are possible.

Question 42

Cold Front?

Answer 42

A mass of cold, dense and stable air advances and replaces a body of warmer air. Moves 25 to 30 MPH. So dense stays close to the ground. \

Question 43

Prior to the passage of a cold front?

Answer 43

Cirriform or towering cumulus clouds, Cumulonimbus clouds are possible. Rains showers or haze. High Dew point.

Question 44

During the passage of a cold front?

Answer 44

Towering cumulus or cumulonimbus clouds, Heavy rain showers with possibly of lightning/thunder and hail. Can possibly produce tornadoes. Poor visibility, winds variables and gusty, temp and dew point drop rapidly.

Question 45

After Cold Front

Answer 45

Towering Cumulus and cumulonimbus clouds begin to dissipate. Good visibility, temps remain cool.

Question 46

Occluded Front

Answer 46

Fast-moving cold front catches up with a slow-moving warm front.

Question 47

What is a squall line?

Answer 47

A narrow band of thunderstorms

Question 48

A tornado that does not reach the ground is what?

Answer 48

A funnel cloud

Question 49

What are the two types of icing?

Answer 49

RIme and Clear Ice