Met

Question 1

ATIS

Answer 1

Released every time significant change in weather
Cloud in AGL
Only forecast where wind is magnetic

Question 2

TAF

Answer 2

Terminal Area Forecast
Valid between time stated on TAF
Covers 8km radius from ARP

Question 3

TEMPO

Answer 3

Valid for no longer than an hour at a time and cumulatively no longer than half the period stated

Question 4

METAR

Answer 4

Released hourly, on the hour

Covers 8km radius from ARP

Question 5

TREND

Answer 5

Aerodrome forecast
Valid for 2hrs at end of METAR or SPECI stating any significant changes
While valid it supersedes TAF

Question 6

AUTO METAR

Answer 6

Released every 1/2 hour, 24 hrs a day, by auto weather station

Question 7

SPECI

Answer 7

Released outside normal time period of METAR when there is significant change in weather that lasts > 10 mins

Question 8

// = ?

Answer 8

Unable to detect weather

Question 9

///

Answer 9

Cloud detected, unsure if CB or TCU

Question 10

////

Answer 10

Vis not reported

Question 11

/////////

Answer 11

Cloud not reported

Question 12

NCD

Answer 12

No cloud detected

TAF and METAR use SKC

Question 13

NDV

Answer 13

No directional variation can be reported

Question 14

PLWR

Answer 14

Possibly lower

Question 15

VC

Answer 15

In the vicinity 8-16km from ARP

Question 16

Southern Hemisphere winds

Altitude increases =
Altitude decreases =

Answer 16

Alt. Increase = Wind backs and strengthens
Alt. Decrease = Wind beers and weakens

Veer = moves clockwise eg. From 270 to 290

Question 17

Environmental lapse rate

Answer 17

1.98*C per 1000ft

Question 18

Dry Adiabatic lapse rate

Answer 18

3*C per 1000ft

Question 19

Saturated adiabatic lapse rate

Answer 19

1.5* per 1000ft

Question 20

ELR > DALR and SALR =

Answer 20

Unstable atmosphere

Question 21

ELR < DALR and SALR =

Answer 21

Stable atmosphere

Question 22

DALR > ELR > SALR =

Answer 22

Conditionally stable atmosphere

Question 23

Characteristics of stable air

Answer 23

Cloud - stratiform
Precipitation - Light to moderate continuous
Vis - Poor
Turbulence - Light to moderate

Question 24

Characteristics of unstable air

Answer 24

Cloud - Cumuliform
Precipitation - Intermittent, showery, moderate to heavy
Vis - Good
Turbulence - Moderate to severe

Question 25

HZ vis =

Answer 25

< 5000m

Question 26

BR vis =

Answer 26

1000 - 5000m

Question 27

FG vis =

Answer 27

< 1000m