AD WRNG (ICAO)

Required roles: AIS PIB API — Roles
Base endpoint: https://ais-pib-api.ibosoft.net.tr:2087/opmet-decoder-ad-wrng-icao
Reference documents: ICAO Doc 10157 PANS-MET, Ed. 1 (27/11/25) · ICAO Doc 8400 PANS-ABC, Ed. 9, Amend. 33 (8/11/18)
Attribution: show ibonav.aero or "Decoded by Ibosoft" wherever decoded output is displayed
Data sources: none — decodes the message supplied in the request.
Last updated: 17 OCT 2026

About the reference documents: Related Documents and Resources

Decodes an aerodrome warning into readable fields, following the PANS-MET template strictly. Optionally returns machine-readable values (parsed).

The format is that of PANS-MET Table A7-6 (see also Chapter 6, 6.6). To get warnings to decode, see AD WRNG; converted warnings end with an RMK … part that is not a template element and is therefore listed as undecodable.

Endpoints

POST /opmet-decoder-ad-wrng-icao/decode?parsed=false
Content-Type: application/json

{ "raw": "<aerodrome warning text>" }

Parameters

Parameter	In	Default	Description
`raw`	body	—	Warning text, at least 10 characters
`parsed`	query	`false`	`true`: add the `parsed` object

How the template is processed

Field names and wording come from PANS-MET Table A7-6 and its notes: output keys are the template element names; phenomena are written out with the template's terms (e.g. HVY SN 25CM → "Heavy snow, expected total snowfall 25 cm", RIME → "Hoar frost or rime"). Abbreviations are expanded as defined in PANS-MET and PANS-ABC (Doc 8400).
M (mandatory) elements are always present (null when missing or not following the template). C (conditional) elements — changes in intensity, cancellation — appear only when present. A cancellation (CNL AD WRNG …) has no phenomenon.
Several phenomena are returned as a list; a single phenomenon as a string.
Free text: text that is not a template phenomenon is accepted as free text up to 32 characters; longer text is undecodable.
Numbers: a numeric placeholder means "up to that many digits" (nn[n]MPS accepts 20MPS); day-time groups and nnnnZ are fixed.
Strict template: groups that do not follow the template are listed under Undecodable elements (neighbouring groups form one entry).

For the full list of phenomena and forms, see PANS-MET Table A7-6.

Response

YUCC AD WRNG 4 VALID 211230/211530 SFC WIND 240/20KT MAX 35 TS GR FCST WKN

{
  "Location indicator of the aerodrome": "YUCC",
  "Identification of the type of message": "Aerodrome warning",
  "Sequence number": "4",
  "Validity period": "Valid from Day 21, 12:30 UTC to Day 21, 15:30 UTC",
  "Phenomenon": ["Surface wind 20 kt from 240°T, maximum 35 kt", "Thunderstorm", "Hail"],
  "Observed or forecast phenomenon": "Forecast",
  "Changes in intensity": "Weakening",
  "positions": [{"start": 0, "end": 4}, "…"],
  "corrected_raw": "YUCC AD WRNG 4 VALID 211230/211530 SFC WIND 240/20KT MAX 35 TS GR FCST WKN",
  "raw": "YUCC AD WRNG 4 VALID 211230/211530 SFC WIND 240/20KT MAX 35 TS GR FCST WKN",
  "parsed": {
    "location_indicator": "YUCC", "sequence_number": 4,
    "utc_day": 21, "utc_time": "1230",
    "valid_to": {"day": 21, "time": "1530"}
  }
}

Key	Description
element keys	Decoded elements, in template order
`Undecodable elements`	Groups that do not follow the template (only when there are any)
`corrected_raw`	The message after normalization (single spaces, upper case, no final `=`); `positions` refer to this text
`positions`	Character spans `{start, end}` in `corrected_raw`, one per decoded value in output order (one per list item), then one per undecodable entry
`parsed`	With `parsed=true`: `location_indicator`, `sequence_number`, start of validity (`utc_day`, `utc_time`), end of validity (`valid_to`); for a cancellation also `cancelled_sequence_number`

Errors

Code	Meaning
`400`	The message could not be parsed at all; `detail` explains why
`422`	`raw` is missing or shorter than 10 characters

AD WRNG (ICAO)#

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How the template is processed#

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