Aviation Weather Center · Schema

AviationWeather METAR Observation

Decoded METAR (or SPECI/SYNOP/BUOY/CMAN) aviation weather observation as returned by GET /api/data/metar?format=json.

AviationWeatherGovernmentNOAANWSMETARTAFPIREPSIGMETAIRMETOpen DataPublic APIs

Properties

Name Type Description
icaoId string ICAO identifier of the reporting station.
receiptTime string Time the observation was received (yyyy-mm-dd hh:mm:ss.sssZ).
obsTime integer Observation time (UNIX epoch seconds).
reportTime string Time of the report (yyyy-mm-dd hh:mm:ss.sssZ).
temp numbernull Temperature in degrees Celsius.
dewp numbernull Dewpoint temperature in degrees Celsius.
wdir integerstringnull Wind direction in degrees, or VRB for variable.
wspd integernull Wind speed in knots.
wgst integernull Wind gust in knots.
visib numberstringnull Visibility in statute miles; "10+" denotes >10 SM.
altim numbernull Altimeter setting in hectopascals.
slp numbernull Sea level pressure in hectopascals.
wxString stringnull Encoded present weather string (e.g. -RA, +TSRA).
presTend numbernull Pressure tendency over last 3 hours in hPa.
maxT numbernull Maximum temperature over last 6 hours (C).
minT numbernull Minimum temperature over last 6 hours (C).
maxT24 numbernull Maximum temperature over last 24 hours (C).
minT24 numbernull Minimum temperature over last 24 hours (C).
precip numbernull Precipitation over last hour (inches).
pcp3hr numbernull Precipitation over last 3 hours (inches).
pcp6hr numbernull Precipitation over last 6 hours (inches).
pcp24hr numbernull Precipitation over last 24 hours (inches).
snow numbernull Snow depth (inches).
vertVis integernull Vertical visibility in feet.
metarType string Observation encoding type.
rawOb string Raw text of the observation.
lat number Latitude of site (decimal degrees).
lon number Longitude of site (decimal degrees).
elev integer Elevation in meters.
name string Full name of the site.
clouds array Cloud layers reported.
fltCat string Flight category.
View JSON Schema on GitHub

JSON Schema

aviationweather-metar-schema.json Raw ↑ 
{
  "$schema": "https://json-schema.org/draft/2020-12/schema",
  "$id": "https://api-evangelist.github.io/aviationweather/json-schema/aviationweather-metar-schema.json",
  "title": "AviationWeather METAR Observation",
  "description": "Decoded METAR (or SPECI/SYNOP/BUOY/CMAN) aviation weather observation as returned by GET /api/data/metar?format=json.",
  "type": "object",
  "required": ["icaoId", "obsTime", "rawOb"],
  "properties": {
    "icaoId":     { "type": "string", "description": "ICAO identifier of the reporting station.", "examples": ["KORD"] },
    "receiptTime":{ "type": "string", "description": "Time the observation was received (yyyy-mm-dd hh:mm:ss.sssZ)." },
    "obsTime":    { "type": "integer", "description": "Observation time (UNIX epoch seconds)." },
    "reportTime": { "type": "string", "description": "Time of the report (yyyy-mm-dd hh:mm:ss.sssZ)." },
    "temp":       { "type": ["number","null"], "description": "Temperature in degrees Celsius." },
    "dewp":       { "type": ["number","null"], "description": "Dewpoint temperature in degrees Celsius." },
    "wdir":       { "type": ["integer","string","null"], "description": "Wind direction in degrees, or VRB for variable." },
    "wspd":       { "type": ["integer","null"], "description": "Wind speed in knots." },
    "wgst":       { "type": ["integer","null"], "description": "Wind gust in knots." },
    "visib":      { "type": ["number","string","null"], "description": "Visibility in statute miles; \"10+\" denotes >10 SM." },
    "altim":      { "type": ["number","null"], "description": "Altimeter setting in hectopascals." },
    "slp":        { "type": ["number","null"], "description": "Sea level pressure in hectopascals." },
    "wxString":   { "type": ["string","null"], "description": "Encoded present weather string (e.g. -RA, +TSRA)." },
    "presTend":   { "type": ["number","null"], "description": "Pressure tendency over last 3 hours in hPa." },
    "maxT":       { "type": ["number","null"], "description": "Maximum temperature over last 6 hours (C)." },
    "minT":       { "type": ["number","null"], "description": "Minimum temperature over last 6 hours (C)." },
    "maxT24":     { "type": ["number","null"], "description": "Maximum temperature over last 24 hours (C)." },
    "minT24":     { "type": ["number","null"], "description": "Minimum temperature over last 24 hours (C)." },
    "precip":     { "type": ["number","null"], "minimum": 0, "description": "Precipitation over last hour (inches)." },
    "pcp3hr":     { "type": ["number","null"], "minimum": 0, "description": "Precipitation over last 3 hours (inches)." },
    "pcp6hr":     { "type": ["number","null"], "minimum": 0, "description": "Precipitation over last 6 hours (inches)." },
    "pcp24hr":    { "type": ["number","null"], "minimum": 0, "description": "Precipitation over last 24 hours (inches)." },
    "snow":       { "type": ["number","null"], "minimum": 0, "description": "Snow depth (inches)." },
    "vertVis":    { "type": ["integer","null"], "minimum": 0, "description": "Vertical visibility in feet." },
    "metarType":  { "type": "string", "enum": ["METAR","SPECI","SYNOP","BUOY","CMAN"], "description": "Observation encoding type." },
    "rawOb":      { "type": "string", "description": "Raw text of the observation." },
    "lat":        { "type": "number", "description": "Latitude of site (decimal degrees)." },
    "lon":        { "type": "number", "description": "Longitude of site (decimal degrees)." },
    "elev":       { "type": "integer", "description": "Elevation in meters." },
    "name":       { "type": "string", "description": "Full name of the site." },
    "clouds": {
      "type": "array",
      "description": "Cloud layers reported.",
      "items": {
        "type": "object",
        "properties": {
          "cover": { "type": "string", "enum": ["CLR","SKC","NSC","FEW","SCT","BKN","OVC","VV","NCD","TCU","CB"], "description": "Cloud cover code." },
          "base":  { "type": ["integer","null"], "description": "Cloud base in feet AGL." },
          "type":  { "type": ["string","null"], "description": "Cloud type qualifier." }
        }
      }
    },
    "fltCat":     { "type": "string", "enum": ["VFR","MVFR","IFR","LIFR",""], "description": "Flight category." }
  }
}