Met Codes

Symbolic Letters

100

What is/are the symbolic letter(s) for the block number of a station

II

200

what i_x?

Indicator for type of station and present and past weather

300

Indicator for inclusion or omission of precipitation data.

i_R

400

What does h represent

The height of the base of the lowest cloud.

500

Identification letters of part of the report or the version of the code form

M_jM_j

refer to code table 2582

Hodgy Podgy

100

How many WMO Regions are there?

 Five regions plus Antartica

200

What kind of report is a SYNOP message

Report of surface observation from a fixed land station.

300

What are the agencies/ bodies that regulate your Met Service?

WMO, ICAO, Local Authority

400

What is a code group?

A collection of Symbolic Letters which represent some meteorological data

500

Wind flowing towards the North @18 kts and no cloud. 

Nddff= ?

01818

Code meh/ Decode meh

100

78955

CIMH

200

5/8 Ci- 22000 ft    3/8 Ac- 5600 ft  2/8 Cu-2200 ft

h=?

h= 5

300

i_{w= 0}

wind speed estimated in m/s

refer to code table 1855

400

i_Ri_xhVV= 42580

what time was this observation taken?

An intermediate hour

500

 The observer recorded the following values in his notebook:

5 km- S  4265 m- NW  4800m- E     5000m - NE

VV=?

VV= 42

refer to code table 4377

i(R)i(x)hVV

100

What instrument is used to measure visibility in the meteorological offices in the  Caribbean region?

Observer's eyes

200

70331

i_x = 

i_x = 1

refer to regulation 12.2.6.2

300

 Vincentian observer Akeem sent out a report with his VV = 91

If his report was not flagged as an 'error message', where was his observation done?

At sea.

refer to regulation 12.2.1.3.2 and Code table 4377

400

 What are the possible code figures for i_R in WMO Region IV?

1 and 4

500

h= /

height of the base of the cloud is not known, or the base of the cloud at a level lower and the top of the cloud at a level higher than the station. 

refer to code table 1600

Nddff

100

1 okta Cu 2400 ft      Smoke from the factory chimney near the station rises vertically.

Code:Nddff

10000

200

Altocumulus perlucidus covering the entire sky, 2/8 Cu Winds- blowing from the south at 15 kts.

code Nddff

71815

refer to regulation 12.2.2.2.2

300

 At 1159Z, the eye of Hurricane Kate is just east of Saint Lucia. The sky is overcast and the winds are coming from the west with sustained winds of 120 kts .

What will Saige code Nddff?

82799 00099

400

small trees in leaf begin to sway, crested wavelets form on inland water.

Based on the Beaufort scale, what are the descriptive term and mean velocity in kts?

Fresh Breeze      17-21 kts

500

 Code ddff for the following scenario:

1050z - 090 15 kts

1052z- 100 11kts

1054z- 080 9 kts

1056z 180 5kts

1058z 180  5 kts

1805

refer to reg 12.2.2.3.1 and notes with definition of discontinuity