Section 10 - Met

Question 1

What are:

METAR

SPECI

TAF

Answer 1

METAR: routine weather report, trend may be added

SPECI: special/significant change, SPEC M or SPEC B for worse or better

Terminal Aerodrome Forecast 9hrs but up to 24.

Question 2

Define CAVOK?

Answer 2

Vis 10km+
Cloud: No CB or TCU below 5000ft
Weather: Nil Sig Wx

Question 3

How is cloud expressed in a Met Ob?

Answer 3

FEW: 1-2 oktas
SCT: 3-4 oktas
BKN: 5/7 oktas
OVC: 8 oktas

Followed by cloud in 100’s of feet

Question 4

What information should be passed for a units short weather?

Answer 4

Info Code
Time
Runway
Surface Wind
Colour State
Pressure setting
U/S facilities

Question 5

Example of high, medium and low cloud

Answer 5

Cirrus, cirrostratus, cirrocumulus

Altocumulus, altostratus

Stratus, stratocumulus, cumulus, cumulonimbus

Question 6

What are the idea conditions for the formation of radiation fog?

Answer 6

High RH

Little or no cloud so heat is lost from the surface

Little wind so cooling is confined to surface layers

Question 7

How is advection fog formed?

Answer 7

When air moves over a cooler surface which is below the dew point of the moving air