World Area Forecast System(WAFS) Wind/TMP/RH/HGT (via EGRR WIFS)
GET
/faa/wafs/egrr
This data is created and distributed by the World Area Forecast Center (WAFC) in London (EGRR), which operates WAFS, and consists of a high-resolution grid with intervals of 1.25 degrees (approx. 140 km mesh (near the equator)) in lat and lon.
Weather elements are digitized in a grid format using a standard format called GRIB (Gridded Binary) and provided as forecast data for each location.
The forecast elements provided include the following:
- Wind(UGRD: U-component of Wind)
Wind speed component in the east-west direction. Positive values indicate eastward winds, while negative values indicate westward winds. - Wind(VGRD: V-component of Wind)
Wind speed component in the north-south direction. Positive values indicate northward winds, while negative values indicate southward winds. - Temperature(TMP)
Temperature is expressed in Kelvin (K). - Relative Humidity(RH)
The amount of water vapor in the air is expressed as a percentage (%). 100% means saturation. - Geopotential Height(HGT)
Forecasts are issued every three hours and cover the next six to 36 hours.
Update Times (UTC)
- 00:40
- 06:35
- 12:40
- 18:35
- Updates may be performed manually as necessary at times other than those listed above.
Responses
Wx data (EGRR) obtained from the FAA with a resolution of 1.25 degrees.
application/json
JSON
{
"list": [
{
"BaseTime": "2025080100",
"ForecastTime": "2025080212",
"URL": "https://example.com/contents/faa/wafs/egrr/grib2/FAA_WAFS_EGRR_2025080100_036.grib2?Expires=1753855923&Signature=...&Key-Pair-Id=...""
}
]
}