Compare
BUFR vs GRIB
BUFR and GRIB are WMO binary meteorological code forms, but BUFR represents varied observations while GRIB is mainly used for regularly distributed grid data.
Which format should you choose?
Consider BUFR for station, upper-air, or satellite observations and GRIB for numerical forecasts or gridded analyses. Check editions, tables, units, time, coordinates, and local definitions in either.
Good fit for BUFR
Encoding and exchanging surface, upper-air, satellite, and other weather observations
- Keeping observations with time, location, and instrument metadata
- Processing data with WMO-code-aware tools
Good fit for GRIB
Exchanging gridded weather and geophysical data such as forecasts and observations
- Keeping values with grid, time, and parameter metadata
- Efficient processing with GRIB-aware meteorological tools
Basic information
| Field | BUFR | GRIB |
|---|---|---|
| Extension | .bufr, .buf | .grib, .grb, .grib2, .grb2 |
| MIME type | ||
| Common uses | Encoding and exchanging surface, upper-air, satellite, and other weather observations | Exchanging gridded weather and geophysical data such as forecasts and observations |
| How to open | Use a BUFR-capable weather library or tool. Check edition, master table, originating centre, descriptor sequence, subsets, and compression; configure provider-specific local tables. | Use GRIB-aware meteorological analysis or visualization software or a library. Check edition, centre, parameter, grid, reference time, forecast step, and packing. Consult the provider's documentation for local tables and definitions. |
| Export or convert | When converting to CSV or netCDF, verify descriptor-to-column and type mappings, units, missing values, time, location, and repeated-subset structure. Flattening may lose relationships; compare with the source. | When converting to netCDF or another scientific format, verify grid and projection, time and forecast period, units, missing-value bitmap, packing precision, and parameter identifiers. Compare values and coordinates after conversion and keep the original. |
Choose by use case
Keeping observations with time, location, and instrument metadata
Encoding and exchanging surface, upper-air, satellite, and other weather observations
BUFRProcessing data with WMO-code-aware tools
Encoding and exchanging surface, upper-air, satellite, and other weather observations
BUFRKeeping values with grid, time, and parameter metadata
Exchanging gridded weather and geophysical data such as forecasts and observations
GRIBEfficient processing with GRIB-aware meteorological tools
Exchanging gridded weather and geophysical data such as forecasts and observations
GRIBKey point 1
BUFR uses descriptors and tables to define observation fields; GRIB sections describe grid, product, and data representation.
More on the differencesKey point 2
BUFR can combine observations with location and time; GRIB commonly carries forecast or analysis fields on a grid.
More on the differencesMore on the differences
Choose according to the data: BUFR for observation records from stations, balloons, satellites, and similar sources; GRIB for gridded forecast and analysis fields. Verify edition and provider tables, then validate values and metadata after conversion.
- BUFR descriptor sequences define the meaning and structure of observed values. GRIB messages describe regular grids and meteorological products through sections.
- BUFR messages can associate measurements with location and time in flexible subsets. GRIB is commonly organized as gridded forecast or analysis fields.
- When converting, check descriptor and parameter tables, edition, local definitions, grid and coordinates, time, units, missing values, and packing precision; retain the source.
Frequently asked questions
Can BUFR and GRIB be used interchangeably?
Usually not directly. They model different data structures and applications; conversion requires mapping fields and metadata and validating the result.