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The complete WMO compliant GRIB2 definitions of all wave parameters are linked in the page Wave verification
General encoding details
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width | 50% |
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Specific details which should be encoded in GRIB2 sections 1 and 4:
Section 1 | |||
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Octets | Key name | Value | Description |
6-7 | centre | X | Centre's code ( |
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table below) | |||
8-9 | subCentre | X | If centre is not sufficient ( |
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table below) | |||
10 | tablesVersion | 19 | latest WMO table |
20 | productionStatusOfProcessedData | 0 | Operational products |
1 | Operational test products | ||
21 | typeOfProcessedData | 1 | Forecast products |
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Section 4 | |||
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Octets | Key name | Value | Description |
8-9 | productDefinitionTemplateNumber | 0 | Analysis and Forecast products (instantaneous) (Analysis or forecast at a horizontal level or in a horizontal layer at a point in time (grib2/tables/17/4.0.table)) |
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Centre codes (WMO Manual 306 - WMO Codes)
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Organisation | Acronym |
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WMO Centre | WMO Sub-Centre |
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European Centre for Medium-Range Weather, UK | ECMWF |
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98 |
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N/A |
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ECMWF (RSMC)
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Met office, UK | UKMO |
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74 | N/A |
Fleet Numerical Meteorology and Oceanography |
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Center, USA | FNMOC |
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58 | N/A |
Environment and Climate Change Canada, Canada | ECCC |
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54 |
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N/A |
National Centres for Environmental Prediction, USA | NCEP |
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7 |
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N/A |
Météo France, France | METFR |
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84 |
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N/A |
Deutscher Wetterdienst, Germany | DWD |
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78 |
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N/A | |
Bureau of Meteorology, Australia | BoM |
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1 |
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Service Hydrographique et Océanographique de la Marine, France | SHOM |
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TBD |
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N/A | |
Japan Meteorological Agency, Japan | JMA |
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34 |
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N/A | |
Korea Meteorological Administration, Republic of Korea | KMA |
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40 |
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N/A | |
Puertos del Estado, Spain | PRTOS |
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214 | N/A |
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Danmarks Meteorologiske Institut, Denmark | DMI |
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94 |
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N/A |
National Institute of Water |
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and Atmospheric Research, New Zealand | NIWA |
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TBD |
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N/A |
Det Norske Meteorologiske Institutt, Norway | METNO |
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88 |
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N/A | |
Servicio de Hidrografía Naval, Servicio Meteorológico, Argentina | SHNSM |
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41 |
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N/A |
New Zealand MetService | NZMS |
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TBD |
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N/A | |
Servizio Meteorologico dell'Aeronautica Militare, Italy | METEOAM |
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nazdar
TBD | N/A |
Value
Description
0
Analysis and Forecast products (instantaneous)
(Analysis or forecast at a horizontal level or in a horizontal layer at a point in time (grib2/tables/17/4.0.table))Example of the validity type encoding
This example describes an instantaneous field valid on 20120103 00Z from a forecast starting on 20120101 00Z (time step=48 hours) .
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Time ( instantaneous ) | ||||
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Start of forecast ( section 1 ) | ||||
Octets | values | Meaning of values | Grib_api values | |
12 | Significance of Reference Time | 1 | Start of forecast | |
13-14 | Year (four digits) | 2012 | year of start of forecast |
dataDate=20120101 dataTime=0 |
15 | Month | 01 | month of start of forecast | |
16 | Day | 01 | day of start of forecast | |
17 | Hour | 00 | hour of start of forecast | |
section 4 e.g. template 4.1 | ||||
18 | Indicator of unit of time range | 1 | Hour | |
19-22 | Forecast time | 48 | Forecast step | stepType=instant, step=48 |
Examples of the required GRIB2 files
parameter | Sample file |
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10 metre U wind component | WAVE_165.128_1x1.grb2 |
10 metre V wind component | WAVE_166.128_1x1.grb2 |
Mean wave period based on second moment | WAVE_221.140_1x1.grb2 |
Mean wave direction | WAVE_230.140_1x1.grb2 |
Peak wave period | WAVE_231.140_1x1.grb2 |
Significant height of combined wind waves and swell | WAVE_229.140_1x1.grb2 |
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