TOC > MSC data > HRDPS-North > HRDPS-North on MSC Datamart
GRIB2 data from the High Resolution Deterministic Prediction System North (HRDPS-North)
This page describes all the data from the experimental High Resolution Deterministic Prediction System North (HRDPS-North) available in GRIB2 format on a rotated lat-lon grid at 3km resolution over an extended domain.
Data address
MSC Datamart data can be automatically retrieved with the Advanced Message Queuing Protocol (AMQP) as soon as it becomes available. An overview and examples to access and use Meteorological Service of Canada's open data is also available.
The data is available using the HTTPS protocol and resides in a directory that is plainly accessible to a web browser. Visiting that directory with an interactive browser will yield a raw listing of links, each link being a downloadable GRIB2 file.
The data can be accessed at the following URLs:
where :
- HH: UTC run time [00, 12]
- hhh : Forecast hour [000, 001, 002, ..., 048]
Note: Some weather elements on the grid algorithms ("WEonG") require variable values at t-1, so in order to standardize data supply, forecast times start at 001h.
Technical specification of the grid
Values given to rotated lat-lon grid parameters at 3km resolution:
| Parameter | Value |
|---|---|
| ni | 2230 |
| nj | 1830 |
| resolution at 60° N | 3 km |
| coordinates of first grid point | 0°N ; 97°W |
Note : The most recent versions of wgrib2 and GDAL support these rotated grids.
Nomenclature of file names
Files have the following nomenclature:
{YYYYMMDD}T{HH}Z_MSC_HRDPS-North_{VAR}_{LVLTYPE-LVL}_{Grid}{resolution}_PT{hhh}H.grib2{YYYYMMDD}T{HH}Z_MSC_HRDPS-North-WEonG_{VAR}_{LVLTYPE-LVL}_{Grid}{resolution}_PT{hhh}H.grib2
where :
- YYYYMMDD : Year, month and day of the beginning of the forecast
- T: Time delimiter according to ISO8601 standards
- HH: UTC run time [00, 12]
- Z: Time zone (UTC time)
- MSC: Constant string for Meteorological Service of Canada, the data source
- HRDPS-North: Constant string indicating that the data come from the High Resolution Deterministic Prediction System North
- HRDPS-WEonG: Constant character string indicating that the data originates from the weather elements on the grid ("WEonG") of the High Resolution Deterministic Prediction System North
- VAR: Type of variable contained in the file (e.g. UGRD)
- LVLTYPE-LVL : Vertical level and height [ex: Sfc for the surface, EATM for the integral of the column, DBS-10-20cm layer between 10 and 20cm below the surface, AGL-10m for the height of 10m above ground]
- Grid : Horizontal grid [RLatLon]
- resolution : 0.03. Means a resolution of 0.03° (approx. 3km) in longitudinal and latitudinal directions
- PT{hhh}H: Timing according to ISO8601. P, T and H are constant characters for Period, Time and Hour. "hhh" represents the forecast time [000, 001, 002, ..., 048].
- grib2: Constant character string indicating that the format is GRIB2.
Examples of file names:
- 20231210T00Z_MSC_HRDPS-North_GUST_AGL-10m_RLatLon0.03_PT012H.grib2
- 20231211T12Z_MSC_HRDPS-North-WEonG_VISIFG_Sfc_RLatLon0.03_PT024H.grib2
Variable list
This list contains both the parameters generated from HRDPS-North outputs and the weather elements on the grid (HRDPS-WEonG) calculated in post-processing.
Support
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dd_info mailing list announcements
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