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Flight Dispatch > Section 5 > Flashcards

Section 5 Flashcards

1
Q

How often are Surface Analysis Charts transmitted?

A

Every three hours

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2
Q

Are surface analysis charts forecasts or reports?

A

Reports

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3
Q

Solid lines depicting sea level pressure patterns are called

A

Isobars

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4
Q

Isobars are usually spaced out in intervals of

A

4 millibars

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5
Q

When overall pressure gradient is weak, dashed isobars are inserted at ____ intervals to more clearly define the pressure pattern.

A

2 millibars

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6
Q

L on a surface analysis chart means?

A

Low pressure center

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7
Q

H on a surface analysis chart means?

A

High pressure center

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8
Q

The symbols on a front point in the direction the front is

A

heading to

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9
Q

Two short lines across a front indicates ________ of front ___________

A

Change Type

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10
Q

A trough will be depicted as

A

thick dashed line

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11
Q

Aviation surface analysis chart will contain:

A

Temperature in F, wind (kt), ceiling, sky cover, visibility, weather

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12
Q

Visibility less than 1sm are coded as

A

0

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13
Q

Where could you look to find the visibility if it said 0?

A

METAR

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14
Q

What are surface analysis charts mainly used for?

A

Pressure systems and Fronts

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15
Q

Are Radar charts reported or forecast weather?

A

Reported

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16
Q

Radar images are primarily used to identify areas of

A

Precipitation

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17
Q

Echoes displayed indicate the _______ of precipitation

A

Intensity

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18
Q

What are the four levels of intensity for precipitation (RADAR)

A

light, moderate, heavy, extreme

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19
Q

What does Tornado Watch mean?

A

severe weather is possible during the watch valid time

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20
Q

What does Tornado Warning mean?

A

Severe weather has been observed or is expected within the hour.

21
Q

Convective precipitation echoes tend to form as ___________

A

lines or cells

22
Q

Which is better at detecting embedded CBs? Aircraft on board radar or surface based radar?

A

Surfaced based radar

23
Q

Upper air sounding are _____________ weather

A

reported

24
Q

Upper air sounding are issued how many times per day?

A

2

25
Q

lifted index is a measure of atmospheric ___________

A

stability

26
Q

What does a positive LI value mean for a lifted surface parcel?

A

it is stable

27
Q

What does a negative LI value mean for a lifted surface parcel?

A

it is unstable

28
Q

What would a LI value of -6 or less mean?

A

Very unstable air

29
Q

KI value is and indicator of the _________
and coverage of storms.

A

Probability

30
Q

Large positive KI value implies _______

A

moist and unstable air

31
Q

winds and temperatures aloft charts is a ___________ weather.

A

forecast

32
Q

Winds and Temperature Aloft charts are published how many times per day?

A

4

33
Q

What unit is used for Winds and Temperature Aloft Charts?

A

Celsius

34
Q

In Winds and Temperature aloft charts do positive and negative temps both have signs TRUE/FALSE

A

FALSE
Positive temps will not have signs

35
Q

Wind direction in a Winds and Temp aloft chart are in reference to __________ North?

A

TRUE

36
Q

G-Airmets will display moderate or severe conditions?

A

Moderate

37
Q

What kind of weather does G-Airmets exclude?

A

Convective

38
Q

Short-Range SFC Prog charts are _______
weather?

A

Forecast

39
Q

How often are Short-Range SFC Progs issued?

A

4 times a day

40
Q

What does the green area represent on a Short-range SFC Prog?

A

Possibility of rain

41
Q

If weather is likely in a Short-Range SFC Prog what is the percentage of probability?

A

More than or equal to 55%

42
Q

To what height does a low level prog chart start and extend to?

A

Surface to FL240/400mb

43
Q

Solid lines on a low level prog chart represent?

A

Ceiling less than 1000ft and or VV less than 3sm (IFR conditions)

44
Q

Scalloped lines on a low level prog chart represent?

A

ceiling 1000-3000 ft and or VV 3-5 sm
(Marginal VFR)

45
Q

Freezing levels aloft on a Low level prog chart are depicted by

A

dashes

46
Q

Moderate or greater turbulence/CAT on a low level prog chart are depicted by

A

bold long dashed lines enclosing the area

47
Q

What is omitted on a low level prog chart when turbulence reaches the surface?

A

base

48
Q

What is depicted by zig-zag lines on a low level prog?

A

freezing level at surface

Flight Dispatch (10 decks)

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