Weather

Question 1

Lapse rates

Answer 1

Standard lapse rate: 2°C per 1000 feet
Dry adiabatic lapse rate: 3°C per 1000 feet
Moist adiabatic lapse rate: 1.1-2.8°C per 1000 feet
Standard pressure lapse rate: 1” per 1000 feet

Question 2

What is necessary for cloud formations

Answer 2

Condensation nuclei
Moisture
Small temperature/dew point spread

Question 3

Standard temperature and pressure

Answer 3

29.92 inches of mercury at sea level
14.7 psi
1014 millibars
15°C

Question 4

High pressure system

Answer 4

1. Air is more dense
2. Flows clockwise, down, and out
3. Surrounded by low pressure
4. Ridges are elongated highs
5. Usually fair weather (stable air)

Question 5

Low pressure system

Answer 5

1. Less dense
2. Air flow counter-clockwise, up and in
3. Trough - elongated low pressure
4. Usually bad weather (unstable air)

Question 6

Temperature inversion

Answer 6

Temperature increases with altitude in layers.
Stable air below layer, unstable (turbulence) below layer.

1. Frontal type- cool forced under warm (cold front) or warm spend over cold (warm front)
2. Surface based

Question 7

Low Clouds

Answer 7

1. Surface to 6,500 AGL
2. Small super cooled water droplets
3. Rime Ice (-15 to -20)

Question 8

Middle Clouds

Answer 8

1. 6,500 - 20,000 AGL
2. Large super cooled droplets
3. Mixed Ice (-10 to -15)

Question 9

High Clouds

Answer 9

1. 20,000 - 60,000 AGL
2. All ice crystals
3. No ice formation

Question 10

EVD Clouds

Answer 10

1. Any altitude

2. Very unstable and turbulence

Question 11

Fog formation

Answer 11

Fog is formed by adding moisture to the air and reducing the temperature to dew point.

Question 12

Temperature / dew point

Answer 12

When temp and dew point are equal, a parcel of air can no longer hold water and visible moisture occurs.

Question 13

Stable air

Answer 13

Cool dry air (Arctic)

V) poor
C) stratus
T) little to none
I) rime ice
P) steady
P) high