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Instrument > SU 9 Aviation weather services > Flashcards

SU 9 Aviation weather services Flashcards

1
Q

AIRMETs are issued on a schedule basis every

A

six hours

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2
Q

SIGMETs are issued as a warning of weather conditions potentially hazardous

A

to all aircraft

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3
Q

Consider this AIRMET which includes your route of flight:
DFWS WA 211445 AIRMET IFR… OK TX FROM END TO TXK TO HOU TO LBB TO END CIG BELOW 010. CONDS ENDH 15-18z
This indicates

A

the area will have low ceilings before 15Z

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4
Q

SIGMETs are issued as a warning of weather conditions potentially hazardous

A

to all aircraft regardless of size or operating environment

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5
Q

The reporting station originating this Aviation Routine Weather Report has a field elevation of 620 feet. If the reported sky cover is one continuous layer, what is its thickness (tops of OVC are reported at 6,500 feet)?

METAR KMDW 121856Z AUTO 32005KT 1 1/2 sm +RA BR OVC007 17/16 A2980

A

5,180 feet

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6
Q

The station originating the following weather report has a field elevation of 1,300 feet MSL. From the bottom of the overcast cloud layer, what is its thickness (tops of OVC are reported at 3,800 feet)?

SPECI KOKC 2228Z 28024G36KT 3/4SM BKN008
OVC020 28/23 A3000

A

500 feet

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7
Q

Interpret the remarks section of METAR surface report for KBNA

A

Rain ended 42 minutes past the hour, snow began 42 minutes past the hour

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8
Q

A ceiling is defined as the height of the

A

lowest layer of clouds or obscuring phenomena aloft that is reported as broken or overcast

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9
Q

What significant sky conditions= is reported in this METAR observation?

A

Sky is obscured with vertical visibility of 800 feet

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10
Q

What is the thickness of the cloud layer given a field elevation of 1,500 feet MSL with tops of the overcast at 7,000 feet MSL?
METAR KHOB 151250Z 17006KT 4SM OVC010 13/11 A2998

A

4,500 feet

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11
Q

Interpret this PIREP MRB UA/OV MRB/TM 1430/FL 060/TP C182/SK BKN BL /WX RA/TB MDT

A

At 6,000 feet; between layers; moderate turbulence; moderate rain

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12
Q

Which response most closely interprets the following PIREP
UA/OV OKC 063064/TM 1522/FL080/TP C172/TA04 /WV245040/TB LGT/RM IN CLR

A

64 nautical miles on the 63 degree radial from Oklahoma City VOR at 1522 UTC, flight level 8,000 feet. Type of aircraft is a Cessna 172

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13
Q

What is the base of the ceiling in the following pilot report?
KMOB UA/ OV APE230010/TM 1515/FL085/TP BE20/SK BKN065/WX FV03SM HZ FU/TA 20/TB LGT

A

There is a broken layer at 6,500 feet

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14
Q

What is indicated by the following report?
TYR UUA/OV TYR180015/TM 1757/FL310/TP B737/TB MOD-SEV CAT 350-390

A

An urgent pilot report for moderate to severe clean air turbulence

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15
Q

Use the TAAF to determine the wind shear forecast
TAF
KCVG 231051Z 2311212 12012KT 4SM -RA BR OVC008 WSA005/27050KT TEMPO 1719 1/2sm
-RA FG
FM1930 09012KT 1SM -DZ BR VV003

A

Wind shear at 500 feet AGL from 270degrees at 50KT

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16
Q

What is the forecast wind at 1800z in the following TAF?
KMEM 091740z 1818 00000KT 1/2SM RAFG OVC005

A

Calm

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17
Q

When the visibility is greater than 6 SM on a TAF, it is

A

expressed as P6SM

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18
Q

Which weather product is a concise statement of the expected weather for an airport’s runway complex?

A

Terminal Aerodrome Forecast (TAF)

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19
Q

A “VRB” wind entry in a Terminal Aerodrome Forecast (TAF) will be indicated when the wind is

A

6 knots or less

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20
Q

The body of a Terminal Aerodrome Forecast (TAF) covers a geographical proximity within a

A

5 statue mile radius from the center of an airport runway complex

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21
Q

Use the following TAF to determine the wind shear forecast
KOKC 051130Z 051212 14008KT 5SM BR BKN030 TEMPO 1316 1 1/2SM BR
FM1600 16010KT P6SM SKC
FM2224 20013G20KT 4SM SHRA OVC020
PROB30 0006 2SM TSRA OVC008CB
WS010/18040KT
FM0608 21015KT P6SM NSW SCT040

A

Wind shear at 1,000 feet, wind from the south at 40KTS

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22
Q

In the following METAR/TAR for HOU, what is the ceiling and visibility forecast on the 7th day of the month at 0600Z?

KHOU 061734Z 0618/0718 16014G22 P6SM
VCSH BKN018 BKN035
FM070100 17010KT P6SM BKN015 OVC025
FM070500 17008KT 4SM BR SCT008 OVC012
FM071000 18005KT 3SM BR OVC007
FM071500 23008KT 5SM BR VCSH SCT008 OVC015

A

4 statue miles visibility and an overcast ceiling at 1,200 feet AGL

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23
Q

A station is forecasting wind and temperature aloft at FL 390 to be 300 degrees at 200 knots; temperature -54 degrees Celsius. How would this data be encoded in the FB?

A

809954

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24
Q

What wind direction and speed is represented by the entry 9900+00 for 9,000 feet, on a Wind and temperature Aloft Forecast (FB)

A

Light and variable; less than 5 knots

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25
Q

When is the temperature at one of the forecast altitudes omitted at a specific location or station in the wind and temperature Aloft forecast (FB)

A

For the 3,000-foot altitude (level) or when the level is within 2,500 feet station elevation

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26
Q

How much colder than standard temperature is the forecast temperature at 9,000 feet, as indicated in the following excerpt from the wind temperature aloft forecast?
FT 6000 9000
0737-04 1043-10

A

7 degrees Celsius

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27
Q

When is the wind group at one of the forecast altitudes omitted at a specific location or station in the Wind and Temperature Aloft forecast (FB) When the wind

A

at the altitude is within 1,500 feet of the station elevation

28
Q

Which values are used for winds aloft forecasts?

A

True direction and knots

29
Q

Decode the excerpt from the Winds and temperature aloft forecast (FB) for OKC at 39,000 feet
FT 3000 9000 12000 2400 39000
OKC 9900 2018+00 2130-06 2361-30 830558

A

Wind 330 degrees at 105 knots, temperature -58 degrees celsius

30
Q

(Refer to figure 2 on page 391.) What approximate wind direction, speed, and temperature (relative to ISA) should a pilot expect when pilot expect when planning for a flight over ALB at FL 270?

A

275 degree true at 97 knots; ISA +4 degree Celsius

31
Q

(Refer to Figure 2 below.) What approximate wind direction, speed, and temperature (relative to ISA) should a pilot expect when planning for a flight over PSB at FL 270?

A

255 degrees true at 93 knots; ISA +6 degrees celsius

32
Q

(Refer to Figure 2 below.) What approximate wind direction, speed, and temperature (relative to ISA) should a pilot expect when planning for a flight over EMI at FL 270?

A

265 degrees true; 100 knots; ISA +3 Celsius degrees

33
Q

A prognostic chart depicts the conditions

A

forecast to exist at a specific time in the future

34
Q

The Low-Level significant weather prognostic chart depicts weather conditions

A

That are forecasted to exist at a valid time shown on the chart

35
Q

Which meteorological conditions are depicted by a prognostic chart?

A

Conditions forecasted to exist at a specific time shown on the chart

36
Q

(Refer to Figure 18 on page 393.) The U.S. Low-Level Significant weather Prognostic chart at 06z indicated that central Colorado and southeastern Wyoming can expect

A

moderate or greater turbulence from the FL 100 to FL 180

37
Q

(Refer to Figure 18 on page 393.) The 24-hour Low-Level significant weather prognostic chart at 06z indicates that Ohio will likely experience

A

ceiling less than 1,000 feet, visibility less than 3 miles

38
Q

What is the time frame for the validity of Low-Level Significant Weather Prog Charts?

A

12 to 24 hours in the future

39
Q

(Refer to Figure 260 below.) What will the predominant weather be at 1600z in area A

A

Light to moderate rain

40
Q

(refer to Figure 261 above.) What weather condition is forecast to exist in area B

A

Fog

41
Q

The best product to provide an overview of forecast weather conditions creating a complete picture of weather affecting regions across the United States is

A

Graphical Forecast for Aviation (GFA)

42
Q

(Refer to Figure 262 above.) When was this forecast issued?

A

1358Z

43
Q

(Refer to Figure 263 above.) What cloud coverage is forecast to exist in area C?

A

Overcast ceiling at 1,500 ft. MSL

44
Q

(Refer to Figure 264 above.) What does the term “cirrus” in area A indicate?

A

Clouds above FL180

45
Q

(Refer to Figure 20 on page 399.) What is the maximum wind velocity forecast in the jet stream shown on the high-level significant weather prognostic chart over eastern Canada

A

150 knots

46
Q

(Refer to Figure 20 below.) What is the height of the center of the low tropopause height over eastern Canada?

A

FL 290

47
Q

(refer to Figure 7 on page 401.) What weather conditions are predicted within area 3?

A

Severe turbulence from FL 300 to FL 370

48
Q

(refer to Figure 7 on page 401.) What weather conditions are depicted within area 7?

A

Occasional cumulonimbus, bases below 25,000 feet MSL and tops at 53,000 feet MSL

49
Q

(Refer to Figure 7 on page 401.) The U.S. High-Level Significant Weather Prog, area 8 represents the

A

height of the tropopause

50
Q

(refer to figure 7 on page 401.) What type of weather can be expected in the red scalloped area near area 9?

A

Isolated embedded cumulonimbus with tops to FL 330

51
Q

Pilots of IFR flights seeking ATC in-flight weather avoidance assistance should keep in mind that

A

ATC radar limitations and, frequency congestion may limit the controllers capability to provide this service

52
Q

How could you receive in-flight weather information about your destination while still 150NM away?

A

review the destination METAR and TAF through FIS-B

53
Q

A pilot planning to depart at 1100Z on an IFR flight is particularly concerned about the hazard of icing. What sources reflect the most accurate information on icing conditions (current and forecast) at the time of departure?

A

Pilot weather reports (PIREPSs), AIRMETSs, and SIGMETSs

54
Q

What determines how icing is reported on a PIREP

A

Rate of accumulation

55
Q

What flight planning information can a pilot derive from constant pressure charts?

A

Winds and temperature aloft

56
Q

The surface analysis chart depicts

A

actual frontal positions, pressure patterns, temperature, dew point, wind weather, and obstructions to vision at the valid time of the chart

57
Q

What conclusion(s) can be drawn from a 500-milibar Constant Pressure Chart for a planned flight at FL 180?

A

Observed temperature, wind, and temperature/dew point spread along the proposed route can be approximated

58
Q

Which weather forecast describes prospects for an area coverage of both severe and general thunderstorms during the following 24 hours?

A

Convective outlook

59
Q

What information is provided by a Convective Outlook (AC)?

A

It provides prospects of both general and severe thunderstorm activity during the following 24 hours

60
Q

When are Aviation Watch Notification Messages (SAW) issued

A

Unscheduled and issued as required

61
Q

What does a Convective outlook (AC) describe for a following 24-hr period?

A

General thunderstorm activity

62
Q

If you encounter in-flight icing and ATC asks you to report your conditions, what are the official reportable icing values that you are expected to use?

A

Trace, light, moderate, severe

63
Q

When does the National weather service release an Aviation Watch Notification Message (SAW)?

A

Unscheduled and issued as required

64
Q

The distance measured in millibars separating isobars on surface analysis charts is typically

A

4 mb

65
Q

The locations of fronts and pressure systems as of chart time are best determined by referring to a

A

surface analysis chart

Instrument (10 decks)

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