NAME
IsobaricGRIB - GRIB files for air traffic
DESCRIPTION
These files are used by Avinor ATM systems but possibly also of interest to others. They contain temperature and wind forecasts for a set of isobaric layers (i.e. altitudes having the same pressure). There are two different formats, GRIB1 and GRIB2.
The files are (normally) produced every 6 hours. You can check the time when generated using the Last-Modified header or the `updated` key in `available`.
DATA FORMAT
grib1
These files are in GRIB1 format (filetype GRB) for the following regions:
- europe
-
Area 90N -30W 40S 60E, resolution 1.25 degrees (?)
The following isobaric layers are included (in hectoPascal)
grib2
These files are in GRIB2 format (filetype BIN) for the following regions:
- southern_norway
-
Area 64.25N -1.45W 55.35S 14.51E, resolution .1 degrees (?)
The following isobaric layers are included (in hectoPascal)
USAGE
Parameters
- area
-
Name of geographical area covered
- time
-
The time for when the forecast is valid (every 3 hours starting from midnight UTC)
- type
-
grib1orgrib2, used only for filtering in available
Sample request URLs
https://api.met.no/weatherapi/isobaricgrib/1.0/grib1?area=europe&time=2025-11-05T00:00:00Zhttps://api.met.no/weatherapi/isobaricgrib/1.0/grib2?area=southern_norway&time=2025-11-05T00:00:00Z
Methods
- available
-
A list of available data may be retrieved using the 'available' action, using the url:
https://api.met.no/weatherapi/isobaricgrib/1.0/availableOptionally, you can specify the "type" and/or "area" parameters to filter the listing:
https://api.met.no/weatherapi/isobaricgrib/1.0/available.json?type=grib2 - updated
-
Returns a timestamp when the files were last updated
CHANGELOG
All changes are available as an RSS feed at the following URL: https://api.met.no/weatherapi/isobaricgrib/1.0/changelog
Version 1.0: : 2024-11-28
Assumed to be in regular production
Version 1.0: : 2023-11-28
First version in beta