Package Compatibility - wmo-im/iwxxm GitHub Wiki
The following table shows the versions of IWXXM and its individual packages (e.g. METAR/SPECI) and their relationships to ICAO Annex 3 requirements. If more than one version are indicated for an IWXXM report, it means the information model of the report has not been changed across the versions and either one of them can be used. After IWXXM 3.0, a new version scheme has been adopted in which individual package will maintain its own version number instead of inheriting the version number from IWXXM. This eliminates the need to advance the version number of a package with no apparent change with its schema.
| IWXXM Version(Publication date) | METAR/ SPECI | TAF | SIGMET | AIRMET | TCA | VAA | SWA | WAFS SIGWX F/C | VONA | QVA | Requirements(Applicable date) |
|---|---|---|---|---|---|---|---|---|---|---|---|
| 1.1(Jun 2015) | 1.1.0 | 1.1.0 | 1.1.0 | N/A | N/A | N/A | N/A | N/A | N/A | N/A | Annex 3 Am76(14 Nov 2013) |
| 2.1(Nov 2017) | 2.1.1 | 2.1.1 | 2.1.1 | 2.1.1 | 2.1.1 | 2.1.1 | N/A | N/A | N/A | N/A | Annex 3 Am77(10 Nov 2016) |
| 3.0(7 Nov 2019) | 3.0.0 | 3.0.0 | 3.0.0 | 3.0.0 | 3.0.0 | 3.0.0 | 3.0.0 | N/A | N/A | N/A | Annex 3 Am78(8 Nov 2018) |
| 2021-2(15 Nov 2021) | 3.1.0 | 3.0.1 | 4.0.0 | 3.1.0 | 3.1.0 | 3.1.0 | 3.0.1 | 1.0.0 | N/A | N/A | Annex 3 Am79 + Am80(5 Nov 2020) |
| 2023-1(15 Jul 2023) | 3.1.0 | 3.0.1 | 4.0.1 | 3.1.1 | 3.1.0 | 3.1.0 | 3.0.1 | 1.1.0 | N/A | N/A | Annex 3 Am79 + Am80 + Am81(5 Nov 2020) |
| 2025-2(19 Nov 2025) | 3.2.0 | 3.0.2 | 4.0.2 | 3.1.2 | 3.1.1 | 3.2.0 | 3.1.0 | 1.2.0 | 1.0.0 | 1.0.0 | Annex 3 Am82/PANS-MET first edition(27 Nov 2025) |
(#) Release Candidates (RC) are published for review and approval purposes. They are NOT for operational use. (*) A decision had been made in ICAO METP WG-MIE that, following the official release of version 2025-2 in November 2025, only versions 2023-1 and later should be exchanged operationally.