SIGMET / AIRMET

Required roles: AIS PIB API — Roles
Base endpoint: https://ais-pib-api.ibosoft.net.tr:2087/opmet-sigmet-airmet
Reference documents: ICAO Doc 10157 PANS-MET, Ed. 1 (27/11/25)
Attribution: show ibonav.aero wherever this data is displayed
Data sources: NOAA Aviation Weather Center (international SIGMET).
Last updated: 17 OCT 2026

About the reference documents: Related Documents and Resources
Depending on your use, the original data sources may also need to be credited.

Current SIGMET and AIRMET information, as a message list (live) and as a GeoJSON layer with the areas of the phenomena (refreshed every 5 minutes, history kept for 7 days).

PANS-MET defines SIGMET and AIRMET in one template (Table A7-5), so both are served with the same schema; the type field tells them apart. The current data sources provide international SIGMETs; AIRMET messages appear when a data source provides them. To decode a message, pass its raw text to SIGMET / AIRMET (ICAO).

Endpoints

Endpoint Description
GET /opmet-sigmet-airmet/current Messages in force, requested from the data sources at the time of the call
GET /opmet-sigmet-airmet/geojson GeoJSON FeatureCollection of the latest snapshot (or a given one)
GET /opmet-sigmet-airmet/latest-snapshot Identifier of the newest snapshot
GET /opmet-sigmet-airmet/available All stored snapshot identifiers

For a map layer, poll /latest-snapshot and request /geojson only when the identifier changes.

Parameters

Parameter Endpoints Description
fir /current, /geojson Only messages of this FIR (ICAO location indicator of the FIR, e.g. LTAA). Case-insensitive.
date /geojson Snapshot identifier YYYYMMDD_HHMM (UTC) from /available; omit for the latest
source /current, /geojson Use only this data source (noaa); an unknown id returns 400

Snapshots are taken every 5 minutes and kept for 7 days.

Response

Message fields

The same fields are used in /current messages and in the GeoJSON feature properties:

Field Description
type SIGMET or AIRMET, read from the message identification; null if it cannot be identified
icao ICAO location indicator of the issuing meteorological watch office (MWO)
fir_id ICAO location indicator of the FIR
fir_name Name of the FIR
series_id Sequence number of the message (e.g. T02)
hazard Phenomenon group: TS, TURB, ICE, MTW, VA, TC …
valid_from / valid_to Validity period (ISO 8601, UTC)
raw Message text as published
source Name of the data source

/current

{
  "sources": ["NOAA"],
  "fetch_time": "2026-03-18T18:30:00+00:00",
  "count": 1,
  "messages": [
    {
      "type": "SIGMET",
      "icao": "LTAA",
      "fir_id": "LTAA",
      "fir_name": "LTAA ANKARA",
      "series_id": "T02",
      "hazard": "TURB",
      "valid_from": "2026-03-18T13:00:00+00:00",
      "valid_to": "2026-03-18T17:00:00+00:00",
      "raw": "WSIR31 LTAA 181300\nLTAA SIGMET T02 VALID 181300/181700 LTAA- ...",
      "source": "NOAA"
    }
  ]
}

/geojson

A GeoJSON FeatureCollection; each feature is the area of one message, with the message fields above as properties.

/latest-snapshot, /available

{"snapshot": "20260318_1830"}
{"count": 48, "snapshots": ["20260318_1830", "20260318_1825"]}

Errors

Code Meaning
400 Unknown source id
404 No snapshot yet, or no snapshot for the given date (see /available)
502 /current: none of the data sources could be reached
503 The service is starting up; retry shortly