Aviation API

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28 Wind Temperature Charts

Wind and temperature forecasts are issued in chart form for specific times and levels. Wind direction and speed are indicated at selected points by wind arrows with feathers and shaded pennants, and spot temperatures are enclosed in circles. Charts are issued 4 times a day (valid at 00, 06, 12, and 18 UTC).

28.1 By Chart, Flight Level and Validity

28.1.1 Description:

Request the latest prognosis chart for the specified chart identifier, flight level, validity.

28.1.2 API Call:

GET /aviation/v2/chart/windtemp/{chart}/fl/{level}/{validity}

28.1.3 Path Parameters:

Parameter	Example	Description
chart	108	A supported chart identifier value as in the table below. This path parameter is Mandatory.
level	050	A supported flight level. This path parameter is Mandatory.
validity	18	A supported valid at time: 00,06,12,18. This path parameter is Mandatory.

28.1.4 Example:

This example would return a link to the Wind Temperature chart for identifier 108 and flight level 050 with a valid at time of 1800 hours UTC.

All Wind Temperature charts are forecasts and as such have a prognosis period of 18 hours from the issue time.

GET /aviation/v2/chart/windtemp/108/fl/050/18

28.1.5 API Response:

{
      "version": "1.0",
    "issue-time": "2025-08-28T00:25:39Z",
    "path": "/aviation/v2/chart/windtemp/108/fl/050/18",
    "response": [
        {
            "met:index-time": "2025-08-27T22:20:53Z",
            "met:locator": "https://test-api.metservice.com/aviation/assets/chart/windtemp/108/850/2025/08/27/18/202508271800_202508281800_202508272219.gif",
            "met:analysis-time": "2025-08-27T18:00:00Z",
            "met:product-name": "chart",
            "av:chart-level": "850",
            "met:domain": "aviation",
            "met:issue-time": "2025-08-27T22:19:00Z",
            "av:chart-type": "windtemp",
            "met:prognosis-period": "024",
            "met:valid-at": "2025-08-28T18:00:00Z",
            "av:chart-id": "108",
            "met:validity": "18"
        }
    ]
}

28.2 By Chart and Flight Level for the next n hours

28.2.1 Description:

Request the prognosis charts for the specified chart identifier and flight level that have a valid at time which is within the next n hours specified.

28.2.2 API Call:

GET /aviation/v2/chart/windtemp/{chart}/fl/{level}/next/{n}/hours

28.2.3 Path Parameters:

Parameter	Example	Description
chart	920	A supported chart identifier value as in the table below. This path parameter is Mandatory.
level	185	A supported flight level. This path parameter is Mandatory.
n	24	The number of hours into the future that the validity start time of the prognosis chart should fall within. This can be up to 30 hours. This parameter is Mandatory.

28.2.4 Example:

This example would return a set of links to charts for identifier 920 and flight level 185 with a valid at time that is within the next 24 hours from ‘now’.

GET /aviation/v2/chart/windtemp/920/fl/185/next/24/hours

28.2.5 API Response:

{
    "version": "1.0",
    "issue-time": "2021-10-04T23:05:34Z",
    "path": "/aviation/v2/chart/windtemp/920/fl/185/next/24/hours",
    "response": [
    ]
}

28.3 By Chart, Pressure Level and Validity

28.3.1 Description:

Request the latest prognosis chart for the specified chart identifier, pressure level, validity.

28.3.2 API Call:

GET /aviation/v2/chart/windtemp/{chart}/hpa/{level}/{validity}

28.3.3 Path Parameters:

Parameter	Example	Description
chart	795	A supported chart identifier value as in the table below. This path parameter is Mandatory.
level	850	A supported pressure level. This path parameter is Mandatory.
validity	18	A supported valid at time: 00, 06, 12, 18 This path parameter is Mandatory.

28.3.4 Example:

This example would return a link to the Wind Temperature chart for identifier 795 and pressure level 850 with a valid at time of 1800 hours UTC.