Met Renewal

Question 1

What does the descriptor VC mean?

Answer 1

Vicinity.

Question 2

Give 3 examples of phenomena that can be reported as VC

Answer 2

SH
FG
TS

Question 3

The descriptor FZ can only be used with which Phenomena?

Answer 3

FG
RA
DZ

Question 4

Mixed precipitation types are recorded in what order?

Answer 4

The dominant precipitation is reported first. And only preceded by the intensifier e.g. +/-

Question 5

When are RVR readings required?

Answer 5

When the visibility is below 1500m.

Question 6

What are the criteria for reporting minimum vis along side prevailing vis?

Answer 6

When the vis is less than 1500m or less than 50% of prevailing vis. It is is reported after the prevailing vis.

Question 7

The nearest 50m is used when the vis is less than?

Answer 7

800m

Question 8

When the vis is less than 800m the vis is rounded down to the nearest?

Answer 8

50m

Question 9

The nearest 100m is used when the vis is?

Answer 9

800m or more but less than 5000m.

Question 10

When the vis is greater than 800m but less than 5000m the vis will be rounded down to the nearest?

Answer 10

100m

Question 11

The nearest 1000m will be used when the vis is?

Answer 11

5000m but less than 10km.

Question 12

The nearest 1000m will be used when the vis is ?

Answer 12

5000m or more but less than 10km.

Question 13

What’s the reporting criteria for mist(br)?

Answer 13

Vis 5000m or less but greater than 1000m
RH 95% or more
(Difference between dry bulb and dewpoint 1 degrees or less)

Question 14

What’s the reporting criteria for Haze(hz)?

Answer 14

Vis 5000m or less but greater than 1000m

RH less than 95%

Question 15

Criteria for reporting Fog (fg)

Answer 15

Vis less than 1000m

RH 100% or close

Question 16

What’s significant about 5000m or less.

Answer 16

A reason/descriptor must be reported.

Question 17

When would you report recent weather?

Answer 17

After the ceasation or decrease in

• Freezing precipitation
• Moderate/heavy precipitation including ice pellets (PL) snow pellets, Hail(GR)/Small Hail(GS)
• Funnel Cloud(FC), Volcanic Ash
• Thunder storm (TS) with or without precipitation

Question 18

What are the rules for reporting clouds?

Answer 18

Lowest layer, whatever the amount
(below 5000ft or TS/CB)
2nd layer if the amount is 3 oktas or more
(SCT, BKN, OVC)
3rd layer if amount is 5oktas or more
(BKN, OVC)
4 insert any TCU or CB omitted by the above rules, whilst retaining the base height order from lowest to highest.

Question 19

What code is used to report no cloud below 5000ft but CAVOK is not applicable?

Answer 19

NSC

Question 20

Are temperatures rounded up or down?

Answer 20

Rounded to the warmest temp.

Question 21

How would you obtain QNH or QFE without the Vaisala DD50?

Answer 21

Through the Precision aneroid Barometer and doing the calculations in the book or on the.computer.

Question 22

How do you report precipitation not at the airfield but within 8km?

Answer 22

VCSH

Question 23

When would you use sky obscured and how would you code it?

Answer 23

In foggy conditions as well as snow.

VV///

Question 24

Can you report a thurderstorm if there is no lightning?

Answer 24

Yes, but you can’t report one if there is no thunder.

Question 25

What is the requirement for reporting recent TS?

Answer 25

It has ceased.

Question 26

What conditions are required to report variable wind?

Answer 26

Wind speed is greater than 3kts and wind direction is 180 degrees or more from 10 min average from the mean.

Or

Wind speed 3kts or less and when the direction of the past 10 mins is 60 degrees or more but less than 180 degrees.

Question 27

How would you code a recent TS with moderate rain?

Answer 27

RETSRA

Question 28

Define a Squall

Answer 28

A strong wind that rises suddenly by at least 16kts, increasing to 22kts+ and sustained for at least a minute.

Question 29

Define a squall

Answer 29

A sudden increase in wind by 16 kts increasing to 22kts + and sustained for at least a minute.