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Block 4 > Lesson 24 > Flashcards

Lesson 24 Flashcards

1
Q

Aviation Routine Weather Report (METAR)

A
  • reporting surface meteorological data

- scheduled reports transmitted at fixed intervals (at least once per hour)

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2
Q

Aviation Selected Special Weather Report (SPECI)

A
  • an unscheduled report taken when certain criteria have been observed
  • criteria denote weather changes important to aircraft safety
  • only applicable to stations which have the capability of evaluating the event
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3
Q

Announce the word “missing” when any item or component of a weather report is not reported, with the exception of what 4 items?

A
  • report modifier
  • runway visual range
  • present weather group
  • remarks
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4
Q

____ is coded if the wind direction is variable and the speed is 6 knots or less.

A

VRB

-example: VRB04KT “Wind Variable at Four”

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5
Q

00000KT means?

A

wind calm

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6
Q

“V” indicates what if used in the wind section?

A

wind direction is variable and the speed is greater than 6 knots
-example: 180V250 “wind variable between one eight zero and two five zero”

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7
Q

Prevailing Visibility

A

visibility considered representative of conditions at the station; the greatest distance that can be seen throughout at least half the horizon circle (180 degrees) not necessarily continuous

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8
Q

What is the lowest and highest visibility that can be reported by an automated station?

A

Lowest: M1/4SM “visibility less than one quarter”
Highest: 10SM “visibility one zero”

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9
Q

What is the lowest and highest visibility that can be reported by an automated station?

A

Lowest: M1/4SM “visibility less than one quarter”
Highest: 10SM “visibility one zero”

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10
Q

Runway Visual Range (RVR)

A

an instrumentally derived value, based on standard calibrations, that represent the horizontal distance a pilot may see down the runway from the approach end
-Example: R35R/P6000FT “Runway three five right visual range more than six thousand”

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11
Q

VC “vicinity”

A

indicates weather phenomena between 5 and 10 statute miles from the point of observation

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12
Q

Identify the descriptors below:

  • MI
  • PR
  • BC
  • DR
  • BL
  • SH
  • TS
  • FZ
A
  • MI= Shallow
  • PR= Partial
  • BC= Patches
  • DR= Low Drifting
  • BL= Blowing
  • SH= Showers
  • TS= Thunderstorms
  • FZ= Freezing
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13
Q

DZ

A

Drizzle

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14
Q

RA

A

Rain

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15
Q

SN

A

Snow

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16
Q

SG

A

Snow Grains

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17
Q

IC

A

Ice Crystals

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18
Q

PL

A

Ice Pellets

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19
Q

GR

A

Hail

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20
Q

GS

A

Small Hail and/or Snow Pellets

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21
Q

UP

A

Unknown Precipitation

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22
Q

BR

A

Mist

23
Q

FG

A

Fog

24
Q

FU

A

Smoke

25
Q

VA

A

Volcanic Ash

26
Q

DU

A

Widespread Dust

27
Q

SA

A

Sand

28
Q

HZ

A

Haze

29
Q

PY

A

Spray

30
Q

PO

A

Well Developed dust/sand whirls

31
Q

SQ

A

Squalls

32
Q

FC

A

Funnel Cloud, Tornado, Water Spout

33
Q

SS

A

Sandstorm

34
Q

DS

A

Duststorm

35
Q

DS

A

Duststorm

36
Q

VV

A

vertical visibility; 8/8; indefinite ceiling

-Example: VV005 “Indefinite Ceiling five hundred”

37
Q

SKC

A

Clear; 0; used at manual stations when no layers reported; “Clear”

38
Q

CLR

A

clear; 0; used by automated stations to indicate no layers are detected at or below 12,000 ft above the surface
-“Clear below one two thousand”

39
Q

FEW

A

few; 1/8 - 2/8

  • No Remarks: “Few Clouds at less than five zero”
  • Remarks: “Sky Partially Obscured”
40
Q

SCT

A

scattered; 3/8-4/8

  • No Remarks: “Less than five zero scattered”
  • Remarks: “Sky Partially Obscured”
41
Q

BKN

A

broken; 5/8-7/8

- if first BKN or OVC, precede with “Ceiling” ##### “Broken”

42
Q

BKN

A

broken; 5/8-7/8

- if first BKN or OVC, precede with “Ceiling” ##### “Broken”

43
Q

OVC

A

overcast; 8/8

-if first BKN or OVC, precede with “Ceiling” ##### “Broken”

44
Q

DSNT

A

indicates weather phenomena beyond 10 SM of the points of observation

45
Q

DSNT

A

indicates weather phenomena beyond 10 SM of the points of observation

46
Q

OCNL

A

occasional lightning; less than 1 flash/minute

47
Q

FRQ

A

frequent lightning; about 1 to 6 flashes/minute

48
Q

CONS

A

continuous lightning; more than 6 flashes/minute

49
Q

SNINCR 1/4

A

“Snow increase one inch during the past hour, four inches on the ground”

50
Q

Identify the descriptors below:

  • MI
  • PR
  • BC
  • DR
  • BL
  • SH
  • TS
  • FZ
A
  • MI= Shallow
  • PR= Partial
  • BC= Patches
  • DR= Low Drifting (height of less than 6 ft above the ground)
  • BL= Blowing (raised to a height of 6ft or more above the ground)
  • SH= Showers
  • TS= Thunderstorms
  • FZ= Freezing
51
Q

RA

A

Rain (drops larger than 0.02 inch)

52
Q

PL

A

Ice Pellets (diameter of 0.2 inch or less)

53
Q

BR

A

Mist (reduces visibility to less than 7 SM but greater than or equal to 5/8 SM)

54
Q

SQ

A

Squalls (sudden onset of wind speed increases at least 16 knots and is sustained at 22 knots or more for at least one minute)

Block 4 (5 decks)

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