The ECMWF AIFS determenistic model generates single forecast runs at 00, 06, 12, and 18 UTC. All AIFS parameters are freely and openly available.
The AIFS products are released as soon as the data are produced. The open data are produced at 0.25 degrees resolution in GRIB edition 2 format.
More information about the file-naming convention is available on the IFS (Integrated Forecasting System) Data webpage.
Table 1:File-naming convention of the ECMWF AIFS model outputs.
| File-naming convention | Values |
|---|---|
| ROOT | URL of a site hosting the open data |
| yyyymmdd | reference date |
| HH | 00, 06, 12, or 18 |
| model | AIFS |
| resol | 0p25 |
| stream | oper |
| step | forecast time step |
| U | unit of the time step (h) |
| type | fc |
| format | grib2 or bufr |
Index files¶
To find out more about index files, visit the IFS (Integrated Forecasting System) Data website.
{"domain": "g", "date": "20250608", "time": "0000", "expver": "0001", "class": "ai", "type": "fc", "stream": "oper", "step": "0", "levtype": "sfc", "param": "100v", "_offset": 0, "_length": 1382370}