CLASS 09-19 WMO CODE/FLAG TABLES ASSOCIATED WITH BUFR TABLE B

(Version 16.0.0 – 05/04/2011)

Notes: In developing code tables associated with BUFR/CREX Table B to specify units of elements, the following principles should be applied:

(a) Code tables specifying the units for an element which is defined, in the Manual on Codes, by a single symbolic letter shall be compatible with the relevant existing WMO code tables;

(b) Code tables combining two or more existing WMO code tables to specify the units for an element which is defined, in the Manual on Codes, by a group of symbolic letters shall be compatible with the combined code figures of the relevant group of symbolic letters;

(c) Code tables combining two or more existing WMO code tables to specify the units for an element which is defined, in the Manual on Codes, by different symbolic letters shall be compatible with the code figures of the relevant symbolic letters, with successive tens or hundreds values added, as different symbolic letters appropropriate;

(d) Code tables and flag tables should only be used for reporting qualitative information. Quantitative information should be reported as observed using entries in Table B.  "Data description operators" from Table C should be applied when a "scale change" or "data width change" is required;

(e) Reference to existing specification(s) and code table(s) in the Manual on Codes, with explanation of possible deviations, shall be given in an additional table annexed to the annexed to the code tables associated with BUFR/CREX Table B.

0 10 063

Characteristic of pressure tendency

Code figure
0	Increasing, then decreasing; atmospheric pressure the same or higher than 3 hours ago
1	Increasing, then steady; or Increasing, then Increasing more slowly.Atmospheric pressure now higher than 3 hours ago.
2	Increasing (steadily or unsteadily) Atmospheric pressure now higher than 3 hours ago.
3	Decreasing or steady, then increasing; or increasing, then increasing more rapidly Atmospheric pressure now higher than 3 hours ago.
4	Steady; atmospheric pressure the same as 3 hours ago
5	Decreasing, then increasing; atmospheric pressure the same or lower than 3 hours ago
6	Decreasing, then steady; or decreasing, then decreasing more slowly.Atmospheric pressure now lower than 3 hours ago.
7	Decreasing (steadily or unsteadily). Atmospheric pressure now lower than 3 hours ago.
8	Steady or increasing, then decreasing; or decreasing, then decreasing more rapidly. Atmospheric pressure now lower than 3 hours ago.
9-14	Reserved
15	Missing value

Notes:

(1) In reports from automatic stations, code figure 2 shall be used when tendency is positive, 7 when negative, and 4 when the pressure is the same as 3 hours before.

(2) In reports from tropical stations reporting 24-hour pressure changes, code figure 2 shall be used when tendency is positive, 7 when negative, and 4 when pressure Is the same as 24 hours before.

0 11 031

Degree of turbulence

Code figure
0	Nil	In cloud
1	Light
2	Moderate
3	Severe
4	Nil	In clear air
5	Light
6	Moderate
7	Severe
8	Nil	Cloud/clear air not specified
9	Light
10	Moderate
11	Severe
12	Extreme, In clear air
13	Extreme, In cloud
14	Extreme, cloud/clear air not specified
15	Missing value

0 11 037

Turbulence index

Code figure	Average Value of Eddy Dissipation Rate (ave) (m^2/3 s^-1)	Peak Value of Eddy Dissipation Rate (peak) (m^2/3 s^-1)
0	ave <0.1	peak <0.1
1	ave <0.1	0.1 < peak <0.2
2	0.1 < ave <0.2	0.1 < peak <0.2
3	ave <0.1	0.2 < peak <0.3
4	0.1 < ave <0.2	0.2 < peak <0.3
5	0.2 < ave <0.3	0.2 < peak <0.3
6	ave <0.1	0.3 < peak <0.4
7	0.1 < ave <0.2	0.3 < peak <0.4
8	0.2 < ave <0.3	0.3 < peak <0.4
9	0.3 < ave <0.4	0.3 < peak <0.4
10	ave <0.1	0.4 < peak <0.5
11	0.1 < ave <0.2	0.4 < peak <0.5
12	0.2 < ave <0.3	0.4 < peak <0.5
13	0.3 < ave <0.4	0.4 < peak <0.5
14	0.4 < ave <0.5	0.4 < peak <0.5
15	ave <0.1	0.5 < peak <0.8
16	0.1 < ave <0.2	0.5 < peak <0.8
17	0.2 < ave <0.3	0.5 < peak <0.8
18	0.3 < ave <0.4	0.5 < peak <0.8
19	0.4 < ave <0.5	0.5 < peak <0.8
20	0.5 < ave <0.8	0.5 < peak <0.8
21	ave <0.1	0.8 < peak
22	0.1 < ave <0.2	0.8 < peak
23	0.2 < ave <0.3	0.8 < peak
24	0.3 < ave <0.4	0.8 < peak
25	0.4 < ave <0.5	0.8 < peak
26	0.5 < ave <0.8	0.8 < peak
27	0.8 < ave	0.8 < peak
28	Nil	Nil
29-62	Reserved	Reserved
63	Missing value	Missing value

0 11 038

Time of occurrence of peak eddy dissipation rate

Code figure	Minutes prior to observation time (min)
0	min < 1
1	1 < min < 2
2	2 < min < 3
3	3 < min < 4
4	4 < min < 5
5	5 < min < 6
6	6 < min < 7
7	7 < min < 8
8	8 < min < 9
9	9 < min < 10
10	10 < min < 11
11	11 < min < 12
12	12 < min < 13
13	13 < min < 14
14	14 < min < 15
15	No timing information available
16-30	Reserved
31	Missing value

0 11 039

Extended time of occurrence of peak eddy dissipation rate

Code figure	Minutes prior to observation time (min)
0	min < 1
1	1 < min < 2
2	2 < min < 3
3	3 < min < 4
4	4 < min < 5
5	5 < min < 6
6	6 < min < 7
7	7 < min < 8
8	8 < min < 9
9	9 < min < 10
10	10 < min < 11
11	11 < min < 12
12	12 < min < 13
13	13 < min < 14
14	14 < min < 15
15-59	As above to 59 < min < 60
60	No timing information available
61-62	Reserved
63	Missing value

0 13 038

Superadabiatic indicator

Code figure
0	Not superadiabatic
1	Superadiabatic
2	Reserved
3	Missing value

0 13 039

Terrain type (ice/snow)

Code figure
0	Sea ice
1	Snow on land
2-6	Reserved
7	Missing value

0 13 040

Surface flag

Code figure
0	Land
1	Reserved
2	Near coast
3	Ice
4	Possible ice
5	Ocean
6	Coast
7-14	Reserved
7	Missing value

0 13 041

Pasquill-Gifford stability category

Code figure
1	A
2	A-B
3	B
4	B-C
5	C
6	D
7	E
8	F
9	G
10-14	Reserved
15	Missing value

0 13 051

Frequency group, precipitation

Code figure
0	Smaller than any value in the 30-year period
1	In the first quintile
2	In the second quintile
3	In the third quintile
4	In the fourth quintile
5	In the fifth quintile
6	Greater than any value in the 30-year period
7-14	Reserved
15	Missing value

0 15 025

Type of pollutant

Code figure
0	Ozone
1-10	Reserved
11	Fine particulate matter (diameter < 2.5 microns)
12	Fine particulate matter (diameter < 10 microns)
13-14	Reserved
15	Missing value

0 19 001

Type of synoptic feature

Code figure
0	Depression or low (extratroplcal)
1	Tropical depression
2	Tropical storm
3	Severe tropical storm
4	Typhoon
5-9	Reserved
10	Dust/sandstorm
11-62	Reserved
63	Missing value

Note: New local names for storm of various strengths shall be added as necessary.

0 19 008

Vertical extent of circulation

Code figure
0	Reserved
1	Shallow (top of circulation below 700 hPa level)
2	Medium (top between 700 hPa and 400 hPa level)
3	Deep (top above 400 hPa level)
4-6	Reserved
7	Missing value

0 19 010

Method for tracking the center of synoptic feature

Code figure
1	Minimum value of sea level pressure
2	Maximum value of 850 hPa relative vorticity
3-14	Reserved
15	Missing value

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