Latest Version

Latest Version of the Machine Readable Codes

Manual on Codes (WMO-No. 306), Volume I.2

Valid: 1 June 2026

  1. 1 June 2026 is the implementation date.
  2. The zip files contain machine-readable codes of GRIB, BUFR, and the Common Code Tables that can be incorporated into encoders/decoders.
  3. If there are inconsistencies between the entries available below and the Manual on Codes, Volume I.2 (WMO-No. 306), the Manual prevails.
  4. All previous versions are available from https://wis.wmo.int/machine-readable-codes.
Machine Readable CodesVersionDownload
FM 92 GRIB edition 237zip
FM 94 BUFR edition 446zip
Common Code Tables2026-06-01zip

This page was last updated on 8 June 2026