On 12 May 2026, a new forecast stream will be produced by ECMWF's operational Artificial Intelligence Forecasting System ensemble model (AIFS ENS).
The new forecast stream is for wave forecast runs, marking ECMWF's first operational data-driven wave forecasts.
- 4 forecast runs per day (00/06/12/18)
- 6 hourly steps to 360 (15 days)
XIII-i: AIFS forecast
Product description
- 0.25° x 0.25° lat/lon grid or any multiple thereof (global or sub-area)
- On model (Reduced Gaussian) n320 grid
File-naming convention
See File naming convention and format for real-time data#Naming-AIFSviadissemination
XIII-i: AIFS Ensemble Wave forecast
Dissemination schedule
| Forecast Day 0 | 07:00 | 19:00 |
| Forecast Day 10 | 07:40 | 19:40 |
| Forecast Day 15 | 08:00 | 20:00 |
| Derived products Step 0 to 240 | 07:41 | 19:41 |
| Derived products Step 246 to 360 | 08:01 | 20:01 |
- XIII-i-a: Single level - forecast
| Short Name | ID | Long Name | Units |
|---|---|---|---|
| h1012 | 140114 | Significant wave height of all waves with periods within the inclusive range from 10 to 12 seconds | m |
| h1214 | 140115 | Significant wave height of all waves with periods within the inclusive range from 12 to 14 seconds | m |
| h1417 | 140116 | Significant wave height of all waves with periods within the inclusive range from 14 to 17 seconds | m |
| h1721 | 140117 | Significant wave height of all waves with periods within the inclusive range from 17 to 21 seconds | m |
| h2125 | 140118 | Significant wave height of all waves with periods within the inclusive range from 21 to 25 seconds | m |
| h2530 | 140119 | Significant wave height of all waves with periods within the inclusive range from 25 to 30 seconds | m |
| swh | 140229 | Significant height of combined wind waves and swell | m |
| mwd | 140230 | Mean wave direction | Degree true |
| mwp | 140232 | Mean wave period | s |
| cdww | 140233 | Coefficient of drag with waves | - |
| wmb | 140219 | Model bathymetry | m |
XIII-III-a: Event probabilities - Instantaneous weather events- Single level
| Forecast steps | Forecasts ranges |
|---|---|
| T+12h to T+360h |
12-hourly |
| Short Name | ID | Long Name | Units |
|---|---|---|---|
| swhg2 | 131074 | Significant wave height of at least 2 m | % |
| swhg4 | 131075 | Significant wave height of at least 4 m | % |
| swhg6 | 131076 | Significant wave height of at least 6 m | % |
| swhg8 | 131077 | Significant wave height of at least 8 m | % |
| mwpg8 | 131078 | Mean wave period of at least 8 s | % |
| mwpg10 | 131079 | Mean wave period of at least 10 s | % |
| mwpg12 | 131080 | Mean wave period of at least 12 s | % |
| mwpg15 | 131081 | Mean wave period of at least 15 s | % |
XIII-III-b: Event probabilities - Averaged weather events - Single level
| Forecast steps |
|---|
| 120-240, 120-168, 168-240, 240-360 |
| Short Name | ID | Long Name | Units |
|---|---|---|---|
| swhg2 | 131074 | Significant wave height of at least 2 m | % |
| swhg4 | 131075 | Significant wave height of at least 4 m | % |
| swhg6 | 131076 | Significant wave height of at least 6 m | % |
| swhg8 | 131077 | Significant wave height of at least 8 m | % |
| mwpg8 | 131078 | Mean wave period of at least 8 s | % |
| mwpg10 | 131079 | Mean wave period of at least 10 s | % |
| mwpg12 | 131080 | Mean wave period of at least 12 s | % |
| mwpg15 | 131081 | Mean wave period of at least 15 s | % |
Range
Provided by
ECMWF