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PPL > Weather > Flashcards

Weather Flashcards

1
Q

What are the 3 types of weather information?

A

Observation
forecast
analysis

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2
Q

What sigments can last 6 hours

A

While sigments tipically last 4 hours

hurricanes
tropical cyclones
volcanic ash

can last 6hrs

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3
Q

what is a Sierra

A

mountain obscurations or IFR conditions

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4
Q

A airmet, sigment, and convective sigment is a forecast, observation, or analysis?

A

Forecast (weather advisory) they are expected to occur

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5
Q

What is an FA

A

Area Forecast

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6
Q

what is orographic lifting?

A
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7
Q

Virga

A

Precipitation that evaporates before hitting the ground

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8
Q

What are the characteristics of a micro-bust

A

an extreme downdraft up to 6,000 ft and can last 15 min with a horizontal diameter of 2.5 miles and depth of 1,000 feet

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9
Q

what could happen in a temperature inversion

A

at the inversion there could be strong wind shears but stable air above. there can also be poor visibility due to the dust particles stabilizing

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10
Q

What are 3 primary forces that effect the flow of wind

A

surface friction

pressure gradient force

Coriolis force

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11
Q

high pressure

A

good performance
better weather
poor visibility

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12
Q

Low pressure

A

Bad performance
worse weather
Better visibility

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13
Q

stratiform Clouds

A

stable air
constant precipitation
poor visibility

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14
Q

What are the 3 types of icing

A

Instrument icing

structural icing
Forms (rime, mix, clear)

Induction Icing
(engine)

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15
Q

What are the types of fog

A

Steam
upslope
Ground
Advection
Radiation
Precipitation
Ice

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16
Q

How can you tell if we have a stable or unstable rate

A

laps rate

17
Q

what can we expect with a cold front?

A

(clouds)

cumulus clouds

visibility good

showering precipitations

18
Q

What can we expect with a warm front?

A

(clouds)

stratiform clouds

poor visibility

constant precipitations

19
Q

What is the difference between the bolded and unbolded millibars in the prog chart?

A

bolded - forecasted pressure values for significant weather systems

unbolded - represent area of less significant pressure variations ( less intense weather changes)

20
Q

occluded front

A

embedded thunderstorm and Squall lines

21
Q

what is a cold and warm occluded front

A
22
Q

What are general weather characteristics of a cold and warm front

A

PPL (3 decks)

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