{ "$schema": "https://json-schema.org/draft/2019-09/schema", "$id": "https://aviationweather.gov/data/schema/metar1_0.json", "description": "Set of surface observations (METARs)", "type": "array", "default": [], "title": "Observations", "items": { "type": "object", "default": {}, "title": "METAR", "required": [ "metar_id", "icaoId", "receiptTime", "obsTime", "reportTime", "temp", "dewp", "wdir", "wspd", "wgst", "visib", "altim", "slp", "qcField", "wxString", "presTend", "maxT", "minT", "maxT24", "minT24", "precip", "pcp3hr", "pcp6hr", "pcp24hr", "snow", "vertVis", "metarType", "rawOb", "mostRecent", "lat", "lon", "elev", "prior", "name", "clouds" ], "properties": { "metar_id": { "type": "integer", "default": 0, "title": "Unique id number (autoincrement)", "examples": [ 93352910 ] }, "icaoId": { "type": "string", "default": "", "title": "ICAO identifier", "examples": [ "KORD" ] }, "receiptTime": { "type": "string", "default": "", "title": "The time the observation was received (yyyy-mm-dd hh:mm:ss)", "examples": [ "2023-11-03 21:54:03" ] }, "obsTime": { "type": "integer", "default": 0, "title": "The observation time (unix timestamp)", "examples": [ 1699048260 ] }, "reportTime": { "type": "string", "default": "", "title": "The time of the report (yyyy-mm-dd hh:mm:ss)", "examples": [ "2023-11-03 22:00:00" ] }, "temp": { "type": "number", "default": 0.0, "title": "Temperature in Celcius", "examples": [ 14.4 ] }, "dewp": { "type": ["number","null"], "default": null, "title": "Dewpoint temperature in Celcius", "examples": [ 2.8 ] }, "wdir": { "type": ["integer","string"], "default": 0, "title": "Wind direction in degrees or VRB for variable winds", "examples": [ 230, "VRB" ] }, "wspd": { "type": ["integer","null"], "default": null, "title": "Wind speed in knots", "examples": [ 6 ] }, "wgst": { "type": ["integer","null"], "default": null, "title": "Wind gusts in knots", "examples": [ 12 ] }, "visib": { "type": ["number","string","null"], "default": null, "title": "Visibility in statute miles, 10+ is greater than 10 sm", "examples": [ 3, "10+", null ] }, "altim": { "type": "number", "default": null, "title": "Altimeter setting in hectoPascals", "examples": [ 1016.3 ] }, "slp": { "type": ["number","null"], "default": null, "title": "Sea level pressure in hectoPascals", "examples": [ 1016.2, null ] }, "qcField": { "type": "integer", "default": 0, "title": "Quality control bitfield - 0x1=corrected, 0x2=auto, 0x4=auto_station, 0x8=maintenance_indicator_on, 0x10=no_signal, 0x20=lightning_sensor_off, 0x40=freezing_rain_sensor_off, 0x80=present_weather_sensor_off", "examples": [ 4 ] }, "wxString": { "type": ["string","null"], "default": null, "title": "Encoded present weather string", "examples": [ "-RA", "SN", "TSRA" ] }, "presTend": { "type": ["number","null"], "default": null, "title": "Pressure tendency over last 3 hours in hectoPascals", "examples": [ null ] }, "maxT": { "type": ["number","null"], "default": null, "title": "Maximum temperature over last 6 hours in Celcius", "examples": [ 23.4, null ] }, "minT": { "type": ["number","null"], "default": null, "title": "Minimum temperature over last 6 hours in Celcius", "examples": [ 12.3, null ] }, "maxT24": { "type": ["number","null"], "default": null, "title": "Maximum temperature over last 24 hours in Celcius", "examples": [ 23.4 ] }, "minT24": { "type": ["number","null"], "default": null, "title": "Minimum temperature over last 24 hours in Celcius", "examples": [ 12.3 ] }, "precip": { "type": ["number","null"], "default": null, "title": "Precipitation over last hour in inches", "examples": [ 0.01, null ] }, "pcp3hr": { "type": ["number","null"], "default": null, "title": "Precipitation over last 3 hours in inches", "examples": [ 0.10, null ] }, "pcp6hr": { "type": ["number","null"], "default": null, "title": "Precipitation over last 6 hours in inches", "examples": [ 0.23, null ] }, "pcp24hr": { "type": ["number","null"], "default": null, "title": "Precipitation over last 24 hours in inches", "examples": [ 0.53, null ] }, "snow": { "type": ["number","null"], "default": null, "title": "Snow depth in inches", "examples": [ 1, null ] }, "vertVis": { "type": ["integer","null"], "default": null, "title": "Vertical visibility in feet", "examples": [ 100, null ] }, "metarType": { "type": "string", "default": "", "title": "Type of encoding", "enum": ["METAR", "SPECI", "SYNOP", "BUOY", "CMAN"], "examples": [ "METAR" ] }, "rawOb": { "type": "string", "default": "", "title": "Raw text of observation", "examples": [ "KORD 032151Z 23006KT 10SM BKN110 OVC250 14/03 A3000 RMK AO2 SLP162 VIRGA OHD T01440028" ] }, "mostRecent": { "type": "integer", "default": 0, "title": "Most recent flag (1=most recent, 0=not)", "examples": [ 1 ] }, "lat": { "type": "number", "default": 0.0, "title": "Latitude of site in degrees", "examples": [ 41.9602 ] }, "lon": { "type": "number", "default": 0.0, "title": "Longitude of site in degrees", "examples": [ -87.9316 ] }, "elev": { "type": "integer", "default": 0, "title": "Elevation of site in meters", "examples": [ 202 ] }, "prior": { "type": "integer", "default": 0, "title": "Priority of site for proessive disclosure (0-9)", "examples": [ 0 ] }, "name": { "type": "string", "default": "", "title": "Full name of the site", "examples": [ "Chicago/O'Hare Intl, IL, US" ] }, "clouds": { "type": "array", "default": [], "title": "Clouds", "items": { "type": "object", "title": "Cloud layer", "required": [ "cover", "base" ], "properties": { "cover": { "type": "string", "title": "Cover coverage", "enum": ["CLR","CAVOK","FEW","SCT","BKN","OVC","OVX"], "examples": [ "BKN", "OVC" ] }, "base": { "type": "integer", "title": "Cloud base in feet", "examples": [ 11000, 25000 ] } } } } }, "examples": [{ "metar_id": 93352910, "icaoId": "KORD", "receiptTime": "2023-11-03 21:54:03", "obsTime": 1699048260, "reportTime": "2023-11-03 22:00:00", "temp": 14.4, "dewp": 2.8, "wdir": 230, "wspd": 6, "wgst": null, "visib": "10+", "altim": 1016, "slp": 1016.2, "qcField": 4, "wxString": null, "presTend": null, "maxT": null, "minT": null, "maxT24": null, "minT24": null, "precip": null, "pcp3hr": null, "pcp6hr": null, "pcp24hr": null, "snow": null, "vertVis": null, "metarType": "METAR", "rawOb": "KORD 032151Z 23006KT 10SM BKN110 OVC250 14/03 A3000 RMK AO2 SLP162 VIRGA OHD T01440028", "mostRecent": 1, "lat": 41.9602, "lon": -87.9316, "elev": 202, "prior": 0, "name": "Chicago/O'Hare Intl, IL, US", "clouds": [{ "cover": "BKN", "base": 11000 }, { "cover": "OVC", "base": 25000 }] }] } }