Publication Messages - METAR.ws Docs

Every message a channel produces arrives as a publication frame, with the channel name and a data payload whose shape depends on the namespace.

{
    "type": "publication",
    "channel": "metar.obs.eglc",
    "data": {
          "station": "EGLC",
          "temp_c": "25",
          "report_time": "2026-07-12T18:20:00Z",
          "raw": "METAR EGLC 121820Z AUTO 08019KT 9999 NCD 25/04 Q1024"
    }
}

The full field reference for each namespace lives on its own page:

METAR Observations

Fields for the metar.obs and metar.atis namespaces

Model Forecasts

Fields for the metar.forecast namespace

A frame replayed from cache right after subscribing carries "cached": true. Never use a cached frame to measure delivery latency.

Next: Errors

See every error code the server can send.