This endpoint returns gridded forecast output for a single variable as NetCDF (default) or Zarr.
The variable and level parameters are used to specify the variable and level to retrieve.
A model parameter must be provided to specify which weather model's forecast to retrieve. You can find a list of available models here.
WM‑5c valid time
For WM‑5c, the valid time of a forecast is forecast_zero + forecast_hour , NOT initialization_time + forecast_hour .
WM‑5c runs every 20 minutes (initialization_time), but valid times stay on a fixed 3‑hourly cycle (forecast_zero). Multiple runs can share the same forecast_zero as later runs assimilate newer observations while keeping valid times stable.
Alternatively, you can use the time or valid_at (NetCDF/ZARR) parameter to request or use forecast data by valid time directly.
See Time in Forecasts for full details.
Individual variables are only available for active forecasts. For archived forecasts, only the complete dataset with all variables is available. Set the variable parameter to all .
For upper-level atmospheric variables, set the pressure level in hectopascals (hPa) using the level query parameter alongside the variable . To get the same list as JSON via the API, see the Variables endpoint
| Available levels (hPa) |
|---|
| 10 30 50 70 100 150 200 250 300 350 400 450 500 550 600 650 700 750 800 850 900 925 950 975 1000 Upper-level variables are provided for the mean and ensemble members 0–5 only, 6-hourly, forecast hours 0–168. Upper-level forecast hours depend on the run's forecast zero. When the initialization time coincides with the forecast zero, upper-level data is available at forecast hours 0, 6, 12, …, 168. Otherwise, upper-level data is available at forecast hours 3, 9, 15, …, 165. See the run_information endpoint for a specific run's forecast zero and available forecast hours. |
| Available levels (hPa) |
|---|
| Only surface level variables are available. |
| Available levels (hPa) |
|---|
| 10 30 50 70 100 150 200 250 300 350 400 450 500 550 600 650 700 750 800 850 900 925 950 975 1000 |
| Available levels (hPa) |
|---|
| Only surface level variables are available. |
| Available levels (hPa) |
|---|
| Only surface level variables are available. |
| Available levels (hPa) |
|---|
| Only surface level variables are available. |
| Available levels (hPa) |
|---|
| Only surface level variables are available. |
| Available levels (hPa) |
|---|
| Only surface level variables are available. |
All variables for each model are listed below. To get the same list as JSON via the API, see the Variables endpoint .
| Name | Type | Description | Unit |
|---|---|---|---|
| all | all | All variables at all heights. Only variable available for archived initialization_times. | - |
| temperature_2m | surface | 2m temperature | K |
| maximum_temperature_2m_3h | surface | maximum temperature over the next three hours | K |
| minimum_temperature_2m_3h | surface | minimum temperature over the next three hours | K |
| dewpoint_2m | surface | 2m dewpoint temperature | K |
| short_wave_radiation | surface | Mean surface net short wave radiation flux | W/m2 |
| total_cloud_cover | surface | Total cloud cover | % |
| pressure_msl | surface | Mean sea level pressure | hPa |
| total_precipitation_3h | surface | Total precipitation over the last three hours | mm |
| wind_speed_10m | surface | 10m wind speed Recommended for wind speed. Uses specialized computation methods that produce more accurate results than deriving speed from mean u/v vectors. | m/s |
| wind_speed_100m | surface | 100m wind speed Recommended for wind speed. Uses specialized computation methods that produce more accurate results than deriving speed from mean u/v vectors. | m/s |
| wind_u_10m | surface | 10m u-component of wind For wind speed, use wind_speed_10m instead of computing from u/v components. | m/s |
| wind_v_10m | surface | 10m v-component of wind For wind speed, use wind_speed_10m instead of computing from u/v components. | m/s |
| wind_u_100m | surface | 100m u-component of wind For wind speed, use wind_speed_100m instead of computing from u/v components. | m/s |
| wind_v_100m | surface | 100m v-component of wind For wind speed, use wind_speed_100m instead of computing from u/v components. | m/s |
| geopotential | upper-level | Geopotential Not geopotential height. Upper-level variables are provided for the mean and ensemble members 0–5 only, 6-hourly, forecast hours 0–168. Upper-level forecast hours depend on the run's forecast zero. When the initialization time coincides with the forecast zero, upper-level data is available at forecast hours 0, 6, 12, …, 168. Otherwise, upper-level data is available at forecast hours 3, 9, 15, …, 165. See the run_information endpoint for a specific run's forecast zero and available forecast hours. | m2/s2 |
| temperature | upper-level | Temperature Upper-level variables are provided for the mean and ensemble members 0–5 only, 6-hourly, forecast hours 0–168. Upper-level forecast hours depend on the run's forecast zero. When the initialization time coincides with the forecast zero, upper-level data is available at forecast hours 0, 6, 12, …, 168. Otherwise, upper-level data is available at forecast hours 3, 9, 15, …, 165. See the run_information endpoint for a specific run's forecast zero and available forecast hours. | K |
| specific_humidity | upper-level | The mass of water vapor per unit mass of dry air Upper-level variables are provided for the mean and ensemble members 0–5 only, 6-hourly, forecast hours 0–168. Upper-level forecast hours depend on the run's forecast zero. When the initialization time coincides with the forecast zero, upper-level data is available at forecast hours 0, 6, 12, …, 168. Otherwise, upper-level data is available at forecast hours 3, 9, 15, …, 165. See the run_information endpoint for a specific run's forecast zero and available forecast hours. | kg/kg |
| wind_u | upper-level | U-component of wind Upper-level variables are provided for the mean and ensemble members 0–5 only, 6-hourly, forecast hours 0–168. Upper-level forecast hours depend on the run's forecast zero. When the initialization time coincides with the forecast zero, upper-level data is available at forecast hours 0, 6, 12, …, 168. Otherwise, upper-level data is available at forecast hours 3, 9, 15, …, 165. See the run_information endpoint for a specific run's forecast zero and available forecast hours. | m/s |
| wind_v | upper-level | V-component of wind Upper-level variables are provided for the mean and ensemble members 0–5 only, 6-hourly, forecast hours 0–168. Upper-level forecast hours depend on the run's forecast zero. When the initialization time coincides with the forecast zero, upper-level data is available at forecast hours 0, 6, 12, …, 168. Otherwise, upper-level data is available at forecast hours 3, 9, 15, …, 165. See the run_information endpoint for a specific run's forecast zero and available forecast hours. | m/s |
| Name | Type | Description | Unit |
|---|---|---|---|
| all | all | All variables at all heights. Only variable available for archived initialization_times. | - |
| temperature_2m | surface | 2m temperature | K |
| dewpoint_2m | surface | 2m dewpoint temperature | K |
| wind_speed_10m | surface | 10m wind speed Recommended for wind speed. Uses specialized computation methods that produce more accurate results than deriving speed from mean u/v vectors. | m/s |
| wind_speed_100m | surface | 100m wind speed Recommended for wind speed. Uses specialized computation methods that produce more accurate results than deriving speed from mean u/v vectors. | m/s |
| wind_u_10m | surface | 10m u-component of wind For wind speed, use wind_speed_10m instead of computing from u/v components. | m/s |
| wind_v_10m | surface | 10m v-component of wind For wind speed, use wind_speed_10m instead of computing from u/v components. | m/s |
| wind_u_100m | surface | 100m u-component of wind For wind speed, use wind_speed_100m instead of computing from u/v components. | m/s |
| wind_v_100m | surface | 100m v-component of wind For wind speed, use wind_speed_100m instead of computing from u/v components. | m/s |
| pressure_msl | surface | Mean sea level pressure | hPa |
| total_precipitation_1h | surface | Total precipitation over the last hour | mm |
| total_precipitation_6h | surface | Total precipitation over the last 6 hours | mm |
| Name | Type | Description | Unit |
|---|---|---|---|
| all | all | All variables at all heights. Only variable available for archived initialization_times. | - |
| temperature_2m | surface | 2m temperature | K |
| wind_u_10m | surface | 10m u-component of wind | m/s |
| wind_v_10m | surface | 10m v-component of wind | m/s |
| wind_u_100m | surface | 100m u-component of wind | m/s |
| wind_v_100m | surface | 100m v-component of wind | m/s |
| pressure_msl | surface | Mean sea level pressure | hPa |
| short_wave_radiation | surface | Mean surface net short wave radiation flux | W/m2 |
| total_cloud_cover | surface | Total cloud cover | % |
| dewpoint_2m | surface | 2m dewpoint temperature | K |
| total_precipitation_1h | surface | Total precipitation over the last hour | mm |
| total_precipitation_6h | surface | Total precipitation over the last 6 hours | mm |
| geopotential | upper-level | Geopotential Not geopotential height | m2/s2 |
| temperature | upper-level | Temperature | K |
| wind_u | upper-level | U-component of wind | m/s |
| wind_v | upper-level | V-component of wind | m/s |
| specific_humidity | surface | The mass of water vapor per unit mass of dry air | kg/kg |
| Name | Type | Description | Unit |
|---|---|---|---|
| all | all | All variables at all heights. Only variable available for archived initialization_times. | - |
| temperature_2m | surface | 2m temperature | K |
| dewpoint_2m | surface | 2m dewpoint temperature | K |
| pressure_msl | surface | Mean sea level pressure | hPa |
| total_precipitation_1h | surface | Total precipitation over the last hour | mm |
| wind_u_10m | surface | 10m u-component of wind | m/s |
| wind_v_10m | surface | 10m v-component of wind | m/s |
| wind_u_100m | surface | 100m u-component of wind | m/s |
| wind_v_100m | surface | 100m v-component of wind | m/s |
| Name | Type | Description | Unit |
|---|---|---|---|
| all | all | All variables at all heights. Only variable available for archived initialization_times. | - |
| temperature_2m | surface | 2m temperature | K |
| Name | Type | Description | Unit |
|---|---|---|---|
| all | all | All variables at all heights. Only variable available for archived initialization_times. | - |
| temperature_2m | surface | 2m temperature | K |
| dewpoint_2m | surface | 2m dewpoint temperature | K |
| pressure_msl | surface | Mean sea level pressure | hPa |
| total_precipitation_1h | surface | Total precipitation over the last hour | mm |
| wind_u_10m | surface | 10m u-component of wind | m/s |
| wind_v_10m | surface | 10m v-component of wind | m/s |
| wind_u_100m | surface | 100m u-component of wind | m/s |
| wind_v_100m | surface | 100m v-component of wind | m/s |
| Name | Type | Description | Unit |
|---|---|---|---|
| all | all | All variables at all heights. Only variable available for archived initialization_times. | - |
| temperature_2m | surface | 2m temperature | K |
| dewpoint_2m | surface | 2m dewpoint temperature | K |
| pressure_msl | surface | Mean sea level pressure | hPa |
| total_precipitation_1h | surface | Total precipitation over the last hour | mm |
| wind_u_10m | surface | 10m u-component of wind | m/s |
| wind_v_10m | surface | 10m v-component of wind | m/s |
| wind_u_100m | surface | 100m u-component of wind | m/s |
| wind_v_100m | surface | 100m v-component of wind | m/s |
| Name | Type | Description | Unit |
|---|---|---|---|
| all | all | All variables at all heights. Only variable available for archived initialization_times. | - |
| temperature_2m | surface | 2m temperature | K |
| dewpoint_2m | surface | 2m dewpoint temperature | K |
| pressure_msl | surface | Mean sea level pressure | hPa |
| total_precipitation_1h | surface | Total precipitation over the last hour | mm |
| wind_u_10m | surface | 10m u-component of wind | m/s |
| wind_v_10m | surface | 10m v-component of wind | m/s |
| Name | Description | Format |
|---|---|---|
| variable Required | Variable to download. Use the Variables endpoint to list what's available for your model. Specify a surface variable (e.g., temperature_2m) or combine with level for upper-level variables (e.g., temperature at 500 hPa). | string |
| level Optional | Pressure level in hectopascals for upper-level variables. | number |
| time Required | The time at which the forecast is valid. Alternatively, you can specify initialization_time and forecast_hour. This looks solely at the date and the hour; minutes and seconds are discarded. If there is no forecast available within an hour of the requested time, it will return a 404. | YYYY-MM-DDThh:mm:ssZ |
| initialization_time Alternative | The initialization time for the forecast. Must be used with forecast_hour. Cannot be used with time. Uses only date, hour and minutes. Seconds are discarded. | YYYY-MM-DDThh:mm:ssZ |
| forecast_hour Alternative | Hours from the initialization_time for which to get the forecast. Must be used with initialization_time. Cannot be used with time. If initialization_time is 2023-01-01T00:00:00 and forecast_hour is 6, the forecast will be for 2023-01-01T06:00:00. | integer |
| ens_member Optional | The ensemble member to get forecasts for. | mean or 0-23 |
| format Optional | Output file format, defaults to NetCDF. | netcdf or zarr |
| Name | Description | Format |
|---|---|---|
| variable Required | Variable to download. Use the Variables endpoint to list what's available for your model. Specify a surface variable (e.g., temperature_2m) or combine with level for upper-level variables (e.g., temperature at 500 hPa). | string |
| time Required | The time at which the forecast is valid. Alternatively, you can specify initialization_time and forecast_hour. This looks solely at the date and the hour; minutes and seconds are discarded. If there is no forecast available within an hour of the requested time, it will return a 404. | YYYY-MM-DDThh:mm:ssZ |
| initialization_time Alternative | The initialization time for the forecast. Must be used with forecast_hour. Cannot be used with time. Uses only date, hour and minutes. Seconds are discarded. | YYYY-MM-DDThh:mm:ssZ |
| forecast_hour Alternative | Hours from the initialization_time for which to get the forecast. Must be used with initialization_time. Cannot be used with time. If initialization_time is 2023-01-01T00:00:00 and forecast_hour is 6, the forecast will be for 2023-01-01T06:00:00. | integer |
| ens_member Optional | The ensemble member to get initialization times for. | mean or 0-23 |
| format Optional | Output file format, defaults to NetCDF. | netcdf or zarr |
| Name | Description | Format |
|---|---|---|
| variable Required | Variable to download. Use the Variables endpoint to list what's available for your model. Specify a surface variable (e.g., temperature_2m) or combine with level for upper-level variables (e.g., temperature at 500 hPa). | string |
| level Optional | Pressure level in hectopascals for upper-level variables. | number |
| time Required | The time at which the forecast is valid. Alternatively, you can specify initialization_time and forecast_hour. This looks solely at the date and the hour; minutes and seconds are discarded. If there is no forecast available within an hour of the requested time, it will return a 404. | YYYY-MM-DDThh:mm:ssZ |
| initialization_time Alternative | The initialization time for the forecast. Must be used with forecast_hour. Cannot be used with time. Uses only date, hour and minutes. Seconds are discarded. | YYYY-MM-DDThh:mm:ssZ |
| forecast_hour Alternative | Hours from the initialization_time for which to get the forecast. Must be used with initialization_time. Cannot be used with time. If initialization_time is 2023-01-01T00:00:00 and forecast_hour is 6, the forecast will be for 2023-01-01T06:00:00. | integer |
| format Optional | Output file format, defaults to NetCDF. | netcdf or zarr |
| Name | Description | Format |
|---|---|---|
| variable Required | Variable to download. Use the Variables endpoint to list what's available for your model. Specify a surface variable (e.g., temperature_2m) or combine with level for upper-level variables (e.g., temperature at 500 hPa). | string |
| time Required | The time at which the forecast is valid. Alternatively, you can specify initialization_time and forecast_hour. This looks solely at the date and the hour; minutes and seconds are discarded. If there is no forecast available within an hour of the requested time, it will return a 404. | YYYY-MM-DDThh:mm:ssZ |
| initialization_time Alternative | The initialization time for the forecast. Must be used with forecast_hour. Cannot be used with time. Uses only date, hour and minutes. Seconds are discarded. | YYYY-MM-DDThh:mm:ssZ |
| forecast_hour Alternative | Hours from the initialization_time for which to get the forecast. Must be used with initialization_time. Cannot be used with time. If initialization_time is 2023-01-01T00:00:00 and forecast_hour is 6, the forecast will be for 2023-01-01T06:00:00. | integer |
| format Optional | Output file format, defaults to NetCDF. | netcdf or zarr |
| Name | Description | Format |
|---|---|---|
| variable Required | Variable to download. Use the Variables endpoint to list what's available for your model. Specify a surface variable (e.g., temperature_2m) or combine with level for upper-level variables (e.g., temperature at 500 hPa). | string |
| time Required | The time at which the forecast is valid. Alternatively, you can specify initialization_time and forecast_hour. This looks solely at the date and the hour; minutes and seconds are discarded. If there is no forecast available within an hour of the requested time, it will return a 404. | YYYY-MM-DDThh:mm:ssZ |
| initialization_time Alternative | The initialization time for the forecast. Must be used with forecast_hour. Cannot be used with time. Uses only date, hour and minutes. Seconds are discarded. | YYYY-MM-DDThh:mm:ssZ |
| forecast_hour Alternative | Hours from the initialization_time for which to get the forecast. Must be used with initialization_time. Cannot be used with time. If initialization_time is 2023-01-01T00:00:00 and forecast_hour is 6, the forecast will be for 2023-01-01T06:00:00. | integer |
| format Optional | Output file format, defaults to NetCDF. | netcdf or zarr |
| Name | Description | Format |
|---|---|---|
| variable Required | Variable to download. Use the Variables endpoint to list what's available for your model. Specify a surface variable (e.g., temperature_2m) or combine with level for upper-level variables (e.g., temperature at 500 hPa). | string |
| time Required | The time at which the forecast is valid. Alternatively, you can specify initialization_time and forecast_hour. This looks solely at the date and the hour; minutes and seconds are discarded. If there is no forecast available within an hour of the requested time, it will return a 404. | YYYY-MM-DDThh:mm:ssZ |
| initialization_time Alternative | The initialization time for the forecast. Must be used with forecast_hour. Cannot be used with time. Uses only date, hour and minutes. Seconds are discarded. | YYYY-MM-DDThh:mm:ssZ |
| forecast_hour Alternative | Hours from the initialization_time for which to get the forecast. Must be used with initialization_time. Cannot be used with time. If initialization_time is 2023-01-01T00:00:00 and forecast_hour is 6, the forecast will be for 2023-01-01T06:00:00. | integer |
| format Optional | Output file format, defaults to NetCDF. | netcdf or zarr |
| Name | Description | Format |
|---|---|---|
| variable Required | Variable to download. Use the Variables endpoint to list what's available for your model. Specify a surface variable (e.g., temperature_2m) or combine with level for upper-level variables (e.g., temperature at 500 hPa). | string |
| time Required | The time at which the forecast is valid. Alternatively, you can specify initialization_time and forecast_hour. This looks solely at the date and the hour; minutes and seconds are discarded. If there is no forecast available within an hour of the requested time, it will return a 404. | YYYY-MM-DDThh:mm:ssZ |
| initialization_time Alternative | The initialization time for the forecast. Must be used with forecast_hour. Cannot be used with time. Uses only date, hour and minutes. Seconds are discarded. | YYYY-MM-DDThh:mm:ssZ |
| forecast_hour Alternative | Hours from the initialization_time for which to get the forecast. Must be used with initialization_time. Cannot be used with time. If initialization_time is 2023-01-01T00:00:00 and forecast_hour is 6, the forecast will be for 2023-01-01T06:00:00. | integer |
| format Optional | Output file format, defaults to NetCDF. | netcdf or zarr |
| Name | Description | Format |
|---|---|---|
| variable Required | Variable to download. Use the Variables endpoint to list what's available for your model. Specify a surface variable (e.g., temperature_2m) or combine with level for upper-level variables (e.g., temperature at 500 hPa). | string |
| time Required | The time at which the forecast is valid. Alternatively, you can specify initialization_time and forecast_hour. This looks solely at the date and the hour; minutes and seconds are discarded. If there is no forecast available within an hour of the requested time, it will return a 404. | YYYY-MM-DDThh:mm:ssZ |
| initialization_time Alternative | The initialization time for the forecast. Must be used with forecast_hour. Cannot be used with time. Uses only date, hour and minutes. Seconds are discarded. | YYYY-MM-DDThh:mm:ssZ |
| forecast_hour Alternative | Hours from the initialization_time for which to get the forecast. Must be used with initialization_time. Cannot be used with time. If initialization_time is 2023-01-01T00:00:00 and forecast_hour is 6, the forecast will be for 2023-01-01T06:00:00. | integer |
| format Optional | Output file format, defaults to NetCDF. | netcdf or zarr |
| Name | Description |
|---|---|
| -m, --model | Set to wm-5c . |
| variable Required | Variable to download. Can be 'all', a surface variable (e.g., temperature_2m), or an upper-level variable (e.g., 500/temperature). |
| level Optional | Pressure level in hectopascals for upper-level variables (e.g., 500). |
| time Required | An ISO 8601 date string representing the time at which the forecast is valid. Format: YYYY-MM-DDThh:mm:ssZ. Minutes/seconds are typically ignored by the backend when finding the closest cycle. |
| initialization_time Alternative | The initialization time for the forecast. Must be used with forecast_hour. Cannot be used with time. Format: YYYY-MM-DDThh:mm:ssZ. Uses only date, hour and minutes. Seconds are discarded. |
| forecast_hour Alternative | Hours from the initialization_time for which to get the forecast. Must be used with initialization_time. Cannot be used with time. If initialization_time is 2023-01-01T00:00:00Z and forecast_hour is 6, the forecast will be for 2023-01-01T06:00:00Z. |
| output_file Required | Path to save the NetCDF (.nc) file. |
| -e --ens-member Optional | The ensemble member to get initialization times for. Can be "mean" or a number between 0 and 23. |
| -f --format Optional | Output file format, defaults to NetCDF. Can be "netcdf" or "zarr". |
| Name | Description |
|---|---|
| -m, --model | Set to wm-4.5-ens . |
| variable Required | Variable to download. Can be 'all', a surface variable (e.g., temperature_2m), or an upper-level variable (e.g., 500/temperature). |
| time Required | An ISO 8601 date string representing the time at which the forecast is valid. Format: YYYY-MM-DDThh:mm:ssZ. Minutes/seconds are typically ignored by the backend when finding the closest cycle. |
| initialization_time Alternative | The initialization time for the forecast. Must be used with forecast_hour. Cannot be used with time. Format: YYYY-MM-DDThh:mm:ssZ. Uses only date, hour and minutes. Seconds are discarded. |
| forecast_hour Alternative | Hours from the initialization_time for which to get the forecast. Must be used with initialization_time. Cannot be used with time. If initialization_time is 2023-01-01T00:00:00Z and forecast_hour is 6, the forecast will be for 2023-01-01T06:00:00Z. |
| output_file Required | Path to save the NetCDF (.nc) file. |
| -e --ens-member Optional | The ensemble member to get initialization times for. Can be "mean" or a number between 0 and 23. |
| -f --format Optional | Output file format, defaults to NetCDF. Can be "netcdf" or "zarr". |
| Name | Description |
|---|---|
| -m, --model | Set to wm-4 . |
| variable Required | Variable to download. Can be 'all', a surface variable (e.g., temperature_2m), or an upper-level variable (e.g., 500/temperature). |
| level Optional | Pressure level in hectopascals for upper-level variables (e.g., 500). |
| time Required | An ISO 8601 date string representing the time at which the forecast is valid. Format: YYYY-MM-DDThh:mm:ssZ. Minutes/seconds are typically ignored by the backend when finding the closest cycle. |
| initialization_time Alternative | The initialization time for the forecast. Must be used with forecast_hour. Cannot be used with time. Format: YYYY-MM-DDThh:mm:ssZ. Uses only date, hour and minutes. Seconds are discarded. |
| forecast_hour Alternative | Hours from the initialization_time for which to get the forecast. Must be used with initialization_time. Cannot be used with time. If initialization_time is 2023-01-01T00:00:00Z and forecast_hour is 6, the forecast will be for 2023-01-01T06:00:00Z. |
| output_file Required | Path to save the NetCDF (.nc) file. |
| -f --format Optional | Output file format, defaults to NetCDF. Can be "netcdf" or "zarr". |
| Name | Description |
|---|---|
| -m, --model | Set to ecmwf-det . |
| variable Required | Variable to download. Can be 'all', a surface variable (e.g., temperature_2m), or an upper-level variable (e.g., 500/temperature). |
| time Required | An ISO 8601 date string representing the time at which the forecast is valid. Format: YYYY-MM-DDThh:mm:ssZ. Minutes/seconds are typically ignored by the backend when finding the closest cycle. |
| initialization_time Alternative | The initialization time for the forecast. Must be used with forecast_hour. Cannot be used with time. Format: YYYY-MM-DDThh:mm:ssZ. Uses only date, hour and minutes. Seconds are discarded. |
| forecast_hour Alternative | Hours from the initialization_time for which to get the forecast. Must be used with initialization_time. Cannot be used with time. If initialization_time is 2023-01-01T00:00:00Z and forecast_hour is 6, the forecast will be for 2023-01-01T06:00:00Z. |
| output_file Required | Path to save the NetCDF (.nc) file. |
| -f --format Optional | Output file format, defaults to NetCDF. Can be "netcdf" or "zarr". |
| Name | Description |
|---|---|
| -m, --model | Set to ecmwf-ens . |
| variable Required | Variable to download. Can be 'all', a surface variable (e.g., temperature_2m), or an upper-level variable (e.g., 500/temperature). |
| time Required | An ISO 8601 date string representing the time at which the forecast is valid. Format: YYYY-MM-DDThh:mm:ssZ. Minutes/seconds are typically ignored by the backend when finding the closest cycle. |
| initialization_time Alternative | The initialization time for the forecast. Must be used with forecast_hour. Cannot be used with time. Format: YYYY-MM-DDThh:mm:ssZ. Uses only date, hour and minutes. Seconds are discarded. |
| forecast_hour Alternative | Hours from the initialization_time for which to get the forecast. Must be used with initialization_time. Cannot be used with time. If initialization_time is 2023-01-01T00:00:00Z and forecast_hour is 6, the forecast will be for 2023-01-01T06:00:00Z. |
| output_file Required | Path to save the NetCDF (.nc) file. |
| -f --format Optional | Output file format, defaults to NetCDF. Can be "netcdf" or "zarr". |
| Name | Description |
|---|---|
| -m, --model | Set to aifs . |
| variable Required | Variable to download. Can be 'all', a surface variable (e.g., temperature_2m), or an upper-level variable (e.g., 500/temperature). |
| time Required | An ISO 8601 date string representing the time at which the forecast is valid. Format: YYYY-MM-DDThh:mm:ssZ. Minutes/seconds are typically ignored by the backend when finding the closest cycle. |
| initialization_time Alternative | The initialization time for the forecast. Must be used with forecast_hour. Cannot be used with time. Format: YYYY-MM-DDThh:mm:ssZ. Uses only date, hour and minutes. Seconds are discarded. |
| forecast_hour Alternative | Hours from the initialization_time for which to get the forecast. Must be used with initialization_time. Cannot be used with time. If initialization_time is 2023-01-01T00:00:00Z and forecast_hour is 6, the forecast will be for 2023-01-01T06:00:00Z. |
| output_file Required | Path to save the NetCDF (.nc) file. |
| -f --format Optional | Output file format, defaults to NetCDF. Can be "netcdf" or "zarr". |
| Name | Description |
|---|---|
| -m, --model | Set to gfs . |
| variable Required | Variable to download. Can be 'all', a surface variable (e.g., temperature_2m), or an upper-level variable (e.g., 500/temperature). |
| time Required | An ISO 8601 date string representing the time at which the forecast is valid. Format: YYYY-MM-DDThh:mm:ssZ. Minutes/seconds are typically ignored by the backend when finding the closest cycle. |
| initialization_time Alternative | The initialization time for the forecast. Must be used with forecast_hour. Cannot be used with time. Format: YYYY-MM-DDThh:mm:ssZ. Uses only date, hour and minutes. Seconds are discarded. |
| forecast_hour Alternative | Hours from the initialization_time for which to get the forecast. Must be used with initialization_time. Cannot be used with time. If initialization_time is 2023-01-01T00:00:00Z and forecast_hour is 6, the forecast will be for 2023-01-01T06:00:00Z. |
| output_file Required | Path to save the NetCDF (.nc) file. |
| -f --format Optional | Output file format, defaults to NetCDF. Can be "netcdf" or "zarr". |
| Name | Description |
|---|---|
| -m, --model | Set to hrrr . |
| variable Required | Variable to download. Can be 'all', a surface variable (e.g., temperature_2m), or an upper-level variable (e.g., 500/temperature). |
| time Required | An ISO 8601 date string representing the time at which the forecast is valid. Format: YYYY-MM-DDThh:mm:ssZ. Minutes/seconds are typically ignored by the backend when finding the closest cycle. |
| initialization_time Alternative | The initialization time for the forecast. Must be used with forecast_hour. Cannot be used with time. Format: YYYY-MM-DDThh:mm:ssZ. Uses only date, hour and minutes. Seconds are discarded. |
| forecast_hour Alternative | Hours from the initialization_time for which to get the forecast. Must be used with initialization_time. Cannot be used with time. If initialization_time is 2023-01-01T00:00:00Z and forecast_hour is 6, the forecast will be for 2023-01-01T06:00:00Z. |
| output_file Required | Path to save the NetCDF (.nc) file. |
| -f --format Optional | Output file format, defaults to NetCDF. Can be "netcdf" or "zarr". |
| Name | Description |
|---|---|
| variable Required | Specifies the forecast variable(s) to download. Options: 'all' (all variables), surface variable (e.g., temperature_2m), or level/variable (e.g., 500/temperature). |
| level Optional | Pressure level in hectopascals for upper-level variables (e.g., 500). |
| model Required | Set to wm-5c . |
| time Required | An ISO 8601 date string representing the time at which the forecast is valid. Format: YYYY-MM-DDThh:mm:ssZ. Minutes/seconds are typically ignored by the backend when finding the closest cycle. |
| initialization_time Alternative | The initialization time for the forecast. Must be used with forecast_hour. Cannot be used with time. Format: YYYY-MM-DDThh:mm:ssZ. Uses only date, hour and minutes. Seconds are discarded. |
| forecast_hour Alternative | Hours from the initialization_time for which to get the forecast. Must be used with initialization_time. Cannot be used with time. If initialization_time is 2023-01-01T00:00:00Z and forecast_hour is 6, the forecast will be for 2023-01-01T06:00:00Z. |
| output_file Required | Path to save the file. |
| ens_member Optional | The ensemble member to get initialization times for. Can be "mean" or a number between 0 and 23. |
| format Optional | Output file format, defaults to NetCDF. Can be "netcdf" or "zarr". |
| Name | Description |
|---|---|
| variable Required | Specifies the forecast variable(s) to download. Options: 'all' (all variables), surface variable (e.g., temperature_2m), or level/variable (e.g., 500/temperature). |
| model Required | Set to wm-4.5-ens . |
| time Required | An ISO 8601 date string representing the time at which the forecast is valid. Format: YYYY-MM-DDThh:mm:ssZ. Minutes/seconds are typically ignored by the backend when finding the closest cycle. |
| initialization_time Alternative | The initialization time for the forecast. Must be used with forecast_hour. Cannot be used with time. Format: YYYY-MM-DDThh:mm:ssZ. Uses only date, hour and minutes. Seconds are discarded. |
| forecast_hour Alternative | Hours from the initialization_time for which to get the forecast. Must be used with initialization_time. Cannot be used with time. If initialization_time is 2023-01-01T00:00:00Z and forecast_hour is 6, the forecast will be for 2023-01-01T06:00:00Z. |
| output_file Required | Path to save the file. |
| ens_member Optional | The ensemble member to get initialization times for. Can be "mean" or a number between 0 and 23. |
| format Optional | Output file format, defaults to NetCDF. Can be "netcdf" or "zarr". |
| Name | Description |
|---|---|
| variable Required | Specifies the forecast variable(s) to download. Options: 'all' (all variables), surface variable (e.g., temperature_2m), or level/variable (e.g., 500/temperature). |
| level Optional | Pressure level in hectopascals for upper-level variables (e.g., 500). |
| model Required | Set to wm-4 . |
| time Required | An ISO 8601 date string representing the time at which the forecast is valid. Format: YYYY-MM-DDThh:mm:ssZ. Minutes/seconds are typically ignored by the backend when finding the closest cycle. |
| initialization_time Alternative | The initialization time for the forecast. Must be used with forecast_hour. Cannot be used with time. Format: YYYY-MM-DDThh:mm:ssZ. Uses only date, hour and minutes. Seconds are discarded. |
| forecast_hour Alternative | Hours from the initialization_time for which to get the forecast. Must be used with initialization_time. Cannot be used with time. If initialization_time is 2023-01-01T00:00:00Z and forecast_hour is 6, the forecast will be for 2023-01-01T06:00:00Z. |
| output_file Required | Path to save the file. |
| format Optional | Output file format, defaults to NetCDF. Can be "netcdf" or "zarr". |
| Name | Description |
|---|---|
| variable Required | Specifies the forecast variable(s) to download. Options: 'all' (all variables), surface variable (e.g., temperature_2m), or level/variable (e.g., 500/temperature). |
| model Required | Set to ecmwf-det . |
| time Required | An ISO 8601 date string representing the time at which the forecast is valid. Format: YYYY-MM-DDThh:mm:ssZ. Minutes/seconds are typically ignored by the backend when finding the closest cycle. |
| initialization_time Alternative | The initialization time for the forecast. Must be used with forecast_hour. Cannot be used with time. Format: YYYY-MM-DDThh:mm:ssZ. Uses only date, hour and minutes. Seconds are discarded. |
| forecast_hour Alternative | Hours from the initialization_time for which to get the forecast. Must be used with initialization_time. Cannot be used with time. If initialization_time is 2023-01-01T00:00:00Z and forecast_hour is 6, the forecast will be for 2023-01-01T06:00:00Z. |
| output_file Required | Path to save the file. |
| format Optional | Output file format, defaults to NetCDF. Can be "netcdf" or "zarr". |
| Name | Description |
|---|---|
| variable Required | Specifies the forecast variable(s) to download. Options: 'all' (all variables), surface variable (e.g., temperature_2m), or level/variable (e.g., 500/temperature). |
| model Required | Set to ecmwf-ens . |
| time Required | An ISO 8601 date string representing the time at which the forecast is valid. Format: YYYY-MM-DDThh:mm:ssZ. Minutes/seconds are typically ignored by the backend when finding the closest cycle. |
| initialization_time Alternative | The initialization time for the forecast. Must be used with forecast_hour. Cannot be used with time. Format: YYYY-MM-DDThh:mm:ssZ. Uses only date, hour and minutes. Seconds are discarded. |
| forecast_hour Alternative | Hours from the initialization_time for which to get the forecast. Must be used with initialization_time. Cannot be used with time. If initialization_time is 2023-01-01T00:00:00Z and forecast_hour is 6, the forecast will be for 2023-01-01T06:00:00Z. |
| output_file Required | Path to save the file. |
| format Optional | Output file format, defaults to NetCDF. Can be "netcdf" or "zarr". |
| Name | Description |
|---|---|
| variable Required | Specifies the forecast variable(s) to download. Options: 'all' (all variables), surface variable (e.g., temperature_2m), or level/variable (e.g., 500/temperature). |
| model Required | Set to aifs . |
| time Required | An ISO 8601 date string representing the time at which the forecast is valid. Format: YYYY-MM-DDThh:mm:ssZ. Minutes/seconds are typically ignored by the backend when finding the closest cycle. |
| initialization_time Alternative | The initialization time for the forecast. Must be used with forecast_hour. Cannot be used with time. Format: YYYY-MM-DDThh:mm:ssZ. Uses only date, hour and minutes. Seconds are discarded. |
| forecast_hour Alternative | Hours from the initialization_time for which to get the forecast. Must be used with initialization_time. Cannot be used with time. If initialization_time is 2023-01-01T00:00:00Z and forecast_hour is 6, the forecast will be for 2023-01-01T06:00:00Z. |
| output_file Required | Path to save the file. |
| format Optional | Output file format, defaults to NetCDF. Can be "netcdf" or "zarr". |
| Name | Description |
|---|---|
| variable Required | Specifies the forecast variable(s) to download. Options: 'all' (all variables), surface variable (e.g., temperature_2m), or level/variable (e.g., 500/temperature). |
| model Required | Set to gfs . |
| time Required | An ISO 8601 date string representing the time at which the forecast is valid. Format: YYYY-MM-DDThh:mm:ssZ. Minutes/seconds are typically ignored by the backend when finding the closest cycle. |
| initialization_time Alternative | The initialization time for the forecast. Must be used with forecast_hour. Cannot be used with time. Format: YYYY-MM-DDThh:mm:ssZ. Uses only date, hour and minutes. Seconds are discarded. |
| forecast_hour Alternative | Hours from the initialization_time for which to get the forecast. Must be used with initialization_time. Cannot be used with time. If initialization_time is 2023-01-01T00:00:00Z and forecast_hour is 6, the forecast will be for 2023-01-01T06:00:00Z. |
| output_file Required | Path to save the file. |
| format Optional | Output file format, defaults to NetCDF. Can be "netcdf" or "zarr". |
| Name | Description |
|---|---|
| variable Required | Specifies the forecast variable(s) to download. Options: 'all' (all variables), surface variable (e.g., temperature_2m), or level/variable (e.g., 500/temperature). |
| model Required | Set to hrrr . |
| time Required | An ISO 8601 date string representing the time at which the forecast is valid. Format: YYYY-MM-DDThh:mm:ssZ. Minutes/seconds are typically ignored by the backend when finding the closest cycle. |
| initialization_time Alternative | The initialization time for the forecast. Must be used with forecast_hour. Cannot be used with time. Format: YYYY-MM-DDThh:mm:ssZ. Uses only date, hour and minutes. Seconds are discarded. |
| forecast_hour Alternative | Hours from the initialization_time for which to get the forecast. Must be used with initialization_time. Cannot be used with time. If initialization_time is 2023-01-01T00:00:00Z and forecast_hour is 6, the forecast will be for 2023-01-01T06:00:00Z. |
| output_file Required | Path to save the file. |
| format Optional | Output file format, defaults to NetCDF. Can be "netcdf" or "zarr". |
Returns a netCDF (.nc) file containing gridded forecast data for the specified variable. This will generally be a redirect to a presigned URL on R2, so you will need to follow the redirect to get the file. Use the -L flag in curl. Only in the short time it takes for the file to be uploaded will it be served directly.