{"station":{"icao":"LTFM","city":{"slug":"istanbul","name":"Istanbul","country":"Türkiye"},"timezone":"Europe/Istanbul","lat":41.01,"lon":28.98,"us":false,"html":"https://weathermarket.io/station/LTFM","json":"https://weathermarket.io/api/station/LTFM","nwsCli":null},"date":"2026-10-22","window":{"date":"2026-10-22","timezone":"Europe/Istanbul","dayStartUtc":"2026-10-21T21:00:00.000Z","dayEndUtc":"2026-10-22T21:00:00.000Z","utcOffsetStart":"+03:00","utcOffsetEnd":"+03:00","hours":24},"complete":true,"values":{"tmax":24,"tmaxAt":"2026-10-22T12:20:00.000Z","tmin":13,"tminAt":"2026-10-21T22:20:00.000Z","tavg":17.8,"humidityMean":72.6,"windMean":3.7,"windMax":5.1,"windMaxAt":"2026-10-22T04:50:00.000Z","precipObservedCount":2,"nObservations":48,"maxGapMinutes":30,"units":{"temperature":"°C","wind":"m/s","humidity":"%"},"source":"Extremes over the METAR observations listed in this record (hourly plus special reports) - the same record values.metarDerived carries in 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is the one to settle on"},"qc":{"summary":{"good":48,"suspect":0,"bad":0,"flagged":[]},"extremes":{"tmax":{"obsTimeUtc":"2026-10-22T12:20:00.000Z","flag":"good","reasons":[]},"tmin":{"obsTimeUtc":"2026-10-21T22:20:00.000Z","flag":"good","reasons":[]},"anyFlagged":false},"excludingBad":{"tmax":24,"tmin":13,"differsFromRecord":false},"note":"Flags are attached beside the anchored record and are not part of its bytes; the record's extremes are unchanged. A suspect extreme is usable but worth checking against the raw text (extremes.*.reasons); a bad report is physically impossible and excludingBad shows the extremes without it."},"official":null,"observations":[{"obsTimeUtc":"2026-10-21T21:20:00.000Z","obsTimeLocal":"2026-10-22T00:20:00+03:00","metarType":"METAR","raw":"METAR LTFM 212120Z 19004KT 150V230 CAVOK 15/13 Q1021 NOSIG","temp":15,"dewpoint":13,"humidity":88,"wind":2.1,"precipObserved":false,"correctedAt":null,"originalRaw":null},{"obsTimeUtc":"2026-10-21T21:50:00.000Z","obsTimeLocal":"2026-10-22T00:50:00+03:00","metarType":"METAR","raw":"METAR LTFM 212150Z 17005KT 150V210 CAVOK 14/13 Q1021 NOSIG","temp":14,"dewpoint":13,"humidity":94,"wind":2.6,"precipObserved":false,"correctedAt":null,"originalRaw":null},{"obsTimeUtc":"2026-10-21T22:20:00.000Z","obsTimeLocal":"2026-10-22T01:20:00+03:00","metarType":"METAR","raw":"METAR LTFM 212220Z 18006KT CAVOK 13/12 Q1021 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LTFM 222020Z 18005KT CAVOK 17/13 Q1018 NOSIG RMK RWY17L 18006KT RWY34L 19004KT RWY16R 19005KT RWY36 17005KT RWY18 19007KT","temp":17,"dewpoint":13,"humidity":77,"wind":2.6,"precipObserved":false,"correctedAt":"2026-10-22T20:29:39.000Z","originalRaw":"METAR LTFM 222020Z 18005KT CAVOK 17/13 Q1018 NOSIG"},{"obsTimeUtc":"2026-10-22T20:50:00.000Z","obsTimeLocal":"2026-10-22T23:50:00+03:00","metarType":"METAR","raw":"METAR LTFM 222050Z 18005KT CAVOK 17/13 Q1018 NOSIG RMK RWY17L 19006G16KT 160V230 RWY34L 19005KT RWY16R 19006KT RWY36 17004KT RWY18 19007KT","temp":17,"dewpoint":13,"humidity":77,"wind":2.6,"precipObserved":false,"correctedAt":"2026-10-22T20:58:43.376Z","originalRaw":"METAR LTFM 222050Z 18005KT CAVOK 17/13 Q1018 NOSIG"}],"about":{"record":"Station-day record: the daily extremes over every METAR observation (hourly plus special reports) received for the station's local calendar day - local midnight to local midnight, daylight saving applied. Temperatures are whole degrees Celsius as reported in METAR; a short-lived peak between reports can be missed. This is not a model or an aggregate - every value points at the report that produced it, and every report in the day is listed verbatim.","settlementRule":"The settlement value is the daily maximum (or minimum) of this record once it is final: the local day has ended and the 3-hour correction hold has passed. A day whose longest gap between reports exceeds the station's normal interval plus 30 minutes is final but flagged not settleable - a market should treat it as a review case. Once final, the canonical record bytes are hashed (SHA-256) and the hash is written to the SnapshotAnchor contract on Flare; the anchored record is the settlement record even if reports change afterwards (matchesCurrent then reads false).","verify":["Every METAR in the day is listed with its raw text; compare it with the independent archives linked under links.external (IEM ASOS archive, Ogimet).","GET links.record for the canonical record bytes, SHA-256 them and compare with anchor.sha256; call SnapshotAnchor.isAnchored(sha256) on Flare (anchor.contract, anchor.chainId) to confirm the hash is on-chain. anchor.explorer opens the anchoring transaction.","Permalink pattern for market rules: https://weathermarket.io/station/LTFM/YYYY-MM-DD (HTML) and https://weathermarket.io/api/station/LTFM/YYYY-MM-DD (JSON)."],"citation":"Settlement source: the METAR-derived station-day record for LTFM for the contract date (station-local calendar day), as published at https://weathermarket.io/station/LTFM/YYYY-MM-DD with every observation used, the finality status and the Flare anchor of the record. The daily value is the extreme over the hourly and special METAR reports in that day; a short-lived peak between reports may be missed. If the record is not final and settleable by the resolution deadline, the market is flagged for review."},"links":{"html":"https://weathermarket.io/station/LTFM/2026-10-22","json":"https://weathermarket.io/api/station/LTFM/2026-10-22","record":"https://weathermarket.io/api/station/LTFM/2026-10-22?format=record","prev":"https://weathermarket.io/station/LTFM/2026-10-21","next":"https://weathermarket.io/station/LTFM/2026-10-23","station":"https://weathermarket.io/station/LTFM","external":{"iem":"https://mesonet.agron.iastate.edu/cgi-bin/request/asos.py?station=LTFM&data=metar&year1=2026&month1=10&day1=21&year2=2026&month2=10&day2=23&tz=Etc%2FUTC&format=onlycomma&latlon=no&elev=no&missing=M&trace=T&direct=no&report_type=3&report_type=4","ogimet":"https://www.ogimet.com/display_metars2.php?lang=en&lugar=LTFM&tipo=SA&ord=REV&nil=SI&fmt=html&ano=2026&mes=10&day=21&hora=21&anof=2026&mesf=10&dayf=22&horaf=20&minf=59&send=send","awcLive":"https://aviationweather.gov/data/metar/?ids=LTFM"}}}