Weather Theory Pt.3
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1
What is ceiling when pertaining to weather?
How much cloud coverage do we have when we look up, partiucularly with broken and overcast
2
How is ceiling measured when pertaining to weather?
With a device that devides the sky up into 8ths
3
What does CLR/SKC mean?
0/8
Sky clear
Sky clear
4
What does Few mean?
1/8-2/8 of the sky being filled with clouds
"FEW"
"FEW"
5
What does Scattered mean?
"SCT"
3/8-4/8 of sky being filled
3/8-4/8 of sky being filled
6
What does Broken mean?
"BKN"
5/8 - 7/8 of sky being filled
5/8 - 7/8 of sky being filled
7
What is Overcast?
"OVC"
8/8 of the sky being filled
8/8 of the sky being filled
8
What is visibility?
Greatest horizontal distance at which prominent objects can be viewed with the naked eye
9
What is a statute mile?
The distance in a straight line basically (SM)
10
What is the max reported statute mile (SM)?
10SM and can be 1/4 mile incrementas for low visibility
11
Stability of an air mass is defined by what?
Its ability to resist vertical motion
12
What is stability determined by?
Moisture and temperature
13
What air mass is very stable?
Coll and dry air
14
What air mass is not stable?
Warm and humid air, think of florida in the summer
15
What is a lapse rate?
How quickly an air mass is cooling down as it gets lifted up
16
What makes vertical development difficult?
Stable air mass
17
Does unstable or stable air typically have beter visibility?
Unstable
18
What three things do you need for a thunderstorm to form?
Sufficeient water vapor
Unstable lapse rate
An initial lifting action of airmass, like heat
Unstable lapse rate
An initial lifting action of airmass, like heat
19
What are the three stages of a thunderstorm?
Cumulus Stage (3-5 mile height), builds into cumulus clouds
Mature Stage (5-10 mile height), when we see water coming to the ground
Dissipating Stage (5-7 mile height), Not much upward movement anymore, the storm is falling on its self till it dissapears
Mature Stage (5-10 mile height), when we see water coming to the ground
Dissipating Stage (5-7 mile height), Not much upward movement anymore, the storm is falling on its self till it dissapears
20
What is a front?
When two large airmasses of different characteristics come in contact with each other acros bodies of water
will cause a change in temperature and wind direction
will cause a change in temperature and wind direction
21
What is a squall line?
Typically related with a cold front, its a narrow band of thunderstorms
22
What are the four types of fronts?
Warm
Cold
Stationary
Occluded
Cold
Stationary
Occluded
23
What does this mean?
Warm front
24
What does this mean?
Cold front
25
What does this mean?
Stationary Front
26
What does this mean?
Occluded front
27
What is a warm front?
A warm air mass moving in land
28
What is a cold front?
Cold air moving in land
29
What is a stationary front?
A front thats not moving
30
What is an occluded front?
When a cold front has caught up to a warm front and becoming a combination of the two
31
What is structural icing?
When ice collects on objects such as your drone
32
When can structural icing occure?
Flying through visable water (rain, cloud, fog)
Temperature where the moisturre strikes is at 0ºC or colder
Temperature where the moisturre strikes is at 0ºC or colder
33
In which environment is aircraft structural ice most likely to have the highest accumulation rate?
Freezing rain