{"station":{"icao":"KSEA","city":{"slug":"seattle","name":"Seattle","country":"United States"},"timezone":"America/Los_Angeles","lat":47.61,"lon":-122.33,"us":true,"html":"https://weathermarket.io/station/KSEA","json":"https://weathermarket.io/api/station/KSEA","nwsCli":{"html":"https://weathermarket.io/nws-cli/KSEA","json":"https://weathermarket.io/api/nws-cli/KSEA"}},"date":"2026-09-30","window":{"date":"2026-09-30","timezone":"America/Los_Angeles","dayStartUtc":"2026-09-30T07:00:00.000Z","dayEndUtc":"2026-10-01T07:00:00.000Z","utcOffsetStart":"-07:00","utcOffsetEnd":"-07:00","hours":24},"complete":true,"values":{"tmax":17.8,"tmaxAt":"2026-09-30T22:53:00.000Z","tmin":10,"tminAt":"2026-09-30T12:53:00.000Z","tavg":13.7,"humidityMean":71.3,"windMean":3.4,"windMax":4.6,"windMaxAt":"2026-09-30T09:53:00.000Z","precipObservedCount":0,"nObservations":26,"maxGapMinutes":60,"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 /api/station/{icao}/daily"},"extremes":{"tmax":{"obsTimeUtc":"2026-09-30T22:53:00.000Z","obsTimeLocal":"2026-09-30T15:53:00-07:00","metarType":"METAR","raw":"METAR KSEA 302253Z 35007KT 10SM FEW020 FEW040 SCT230 18/08 A3009 RMK AO2 SLP196 T01780083 $","temp":17.8,"dewpoint":8.3,"humidity":54,"wind":3.6,"precipObserved":false,"correctedAt":null,"originalRaw":null},"tmin":{"obsTimeUtc":"2026-09-30T12:53:00.000Z","obsTimeLocal":"2026-09-30T05:53:00-07:00","metarType":"METAR","raw":"METAR KSEA 301253Z 06004KT 10SM FEW010 FEW055 SCT250 10/08 A3009 RMK AO2 SLP194 T01000078 $","temp":10,"dewpoint":7.8,"humidity":86,"wind":2.1,"precipObserved":false,"correctedAt":null,"originalRaw":null},"windMax":{"obsTimeUtc":"2026-09-30T09:53:00.000Z","obsTimeLocal":"2026-09-30T02:53:00-07:00","metarType":"METAR","raw":"METAR KSEA 300953Z 03009KT 10SM SCT055 13/06 A3005 RMK AO2 SLP183 T01330056 $","temp":13.3,"dewpoint":5.6,"humidity":60,"wind":4.6,"precipObserved":false,"correctedAt":null,"originalRaw":null}},"finality":{"status":"final","finalAt":"2026-10-01T10:00:00.000Z","settleable":true,"coverage":{"ok":true,"maxGapMinutes":60,"normalIntervalMin":60,"thresholdMinutes":90},"reasons":[],"holdHours":3},"revision":"17c9b26de3dc02f6","lastChangedAt":"2026-10-01T06:56:38.426Z","corrections":[],"anchor":{"contract":"0x2B59812947B48B5988FaA805a9514a5162415091","chainId":14,"record":"https://weathermarket.io/api/station/KSEA/2026-09-30?format=record","status":"anchored","sha256":"85dadde315af8fadfeafdd79578cb6266ad9d0e3a17a59a0dc3b9ebd7e8f4d55","revision":"17c9b26de3dc02f6","flareTxHash":"0x249d9e706f59c57e359ac56df8428e8defd3e8c7033908cc096c8a56852b0c82","flareBlock":71105491,"anchoredAt":"2026-10-02T01:01:27.187Z","explorer":"https://flare-explorer.flare.network/tx/0x249d9e706f59c57e359ac56df8428e8defd3e8c7033908cc096c8a56852b0c82","matchesCurrent":true,"note":"GET the record bytes, SHA-256 them, and call SnapshotAnchor.isAnchored(sha256) on Flare - the anchored record is the one to settle on"},"qc":{"summary":{"good":26,"suspect":0,"bad":0,"flagged":[]},"extremes":{"tmax":{"obsTimeUtc":"2026-09-30T22:53:00.000Z","flag":"good","reasons":[]},"tmin":{"obsTimeUtc":"2026-09-30T12:53:00.000Z","flag":"good","reasons":[]},"anyFlagged":false},"excludingBad":{"tmax":17.8,"tmin":10,"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":{"status":"issued","tmax":18.33,"tmin":9.44,"precip":0,"corrected":false,"issuedAt":"2026-10-01T08:31:00.000Z","html":"https://weathermarket.io/nws-cli/KSEA/2026-09-30","json":"https://weathermarket.io/api/nws-cli/KSEA/2026-09-30"},"observations":[{"obsTimeUtc":"2026-09-30T07:53:00.000Z","obsTimeLocal":"2026-09-30T00:53:00-07:00","metarType":"METAR","raw":"METAR KSEA 300753Z 04006KT 10SM OVC035 14/08 A3004 RMK AO2 SLP179 T01390078 401720117 $","temp":13.9,"dewpoint":7.8,"humidity":67,"wind":3.1,"precipObserved":false,"correctedAt":null,"originalRaw":null},{"obsTimeUtc":"2026-09-30T08:53:00.000Z","obsTimeLocal":"2026-09-30T01:53:00-07:00","metarType":"METAR","raw":"METAR KSEA 300853Z 05005KT 10SM BKN048 14/07 A3005 RMK AO2 SLP181 T01390067 51012 $","temp":13.9,"dewpoint":6.7,"humidity":62,"wind":2.6,"precipObserved":false,"correctedAt":null,"originalRaw":null},{"obsTimeUtc":"2026-09-30T09:53:00.000Z","obsTimeLocal":"2026-09-30T02:53:00-07:00","metarType":"METAR","raw":"METAR KSEA 300953Z 03009KT 10SM SCT055 13/06 A3005 RMK AO2 SLP183 T01330056 $","temp":13.3,"dewpoint":5.6,"humidity":60,"wind":4.6,"precipObserved":false,"correctedAt":null,"originalRaw":null},{"obsTimeUtc":"2026-09-30T10:53:00.000Z","obsTimeLocal":"2026-09-30T03:53:00-07:00","metarType":"METAR","raw":"METAR KSEA 301053Z 34003KT 10SM SCT055 11/07 A3007 RMK AO2 SLP189 T01060072 $","temp":10.6,"dewpoint":7.2,"humidity":79,"wind":1.5,"precipObserved":false,"correctedAt":null,"originalRaw":null},{"obsTimeUtc":"2026-09-30T11:53:00.000Z","obsTimeLocal":"2026-09-30T04:53:00-07:00","metarType":"METAR","raw":"METAR KSEA 301153Z 33003KT 10SM FEW010 FEW055 FEW250 11/08 A3008 RMK AO2 SLP192 70001 T01060083 10139 20100 53010 $","temp":10.6,"dewpoint":8.3,"humidity":86,"wind":1.5,"precipObserved":false,"correctedAt":null,"originalRaw":null},{"obsTimeUtc":"2026-09-30T12:53:00.000Z","obsTimeLocal":"2026-09-30T05:53:00-07:00","metarType":"METAR","raw":"METAR KSEA 301253Z 06004KT 10SM FEW010 FEW055 SCT250 10/08 A3009 RMK AO2 SLP194 T01000078 $","temp":10,"dewpoint":7.8,"humidity":86,"wind":2.1,"precipObserved":false,"correctedAt":null,"originalRaw":null},{"obsTimeUtc":"2026-09-30T13:53:00.000Z","obsTimeLocal":"2026-09-30T06:53:00-07:00","metarType":"METAR","raw":"METAR KSEA 301353Z 04005KT 10SM FEW010 FEW055 SCT250 11/07 A3010 RMK AO2 SLP198 T01060072 $","temp":10.6,"dewpoint":7.2,"humidity":79,"wind":2.6,"precipObserved":false,"correctedAt":null,"originalRaw":null},{"obsTimeUtc":"2026-09-30T14:53:00.000Z","obsTimeLocal":"2026-09-30T07:53:00-07:00","metarType":"METAR","raw":"METAR KSEA 301453Z 03009KT 10SM FEW010 SCT055 BKN250 11/08 A3011 RMK AO2 SLP203 T01110078 53011 $","temp":11.1,"dewpoint":7.8,"humidity":80,"wind":4.6,"precipObserved":false,"correctedAt":null,"originalRaw":null},{"obsTimeUtc":"2026-09-30T15:53:00.000Z","obsTimeLocal":"2026-09-30T08:53:00-07:00","metarType":"METAR","raw":"METAR KSEA 301553Z 01008KT 10SM FEW015 FEW060 SCT140 SCT250 12/08 A3014 RMK AO2 SLP211 T01220083 $","temp":12.2,"dewpoint":8.3,"humidity":77,"wind":4.1,"precipObserved":false,"correctedAt":null,"originalRaw":null},{"obsTimeUtc":"2026-09-30T16:53:00.000Z","obsTimeLocal":"2026-09-30T09:53:00-07:00","metarType":"METAR","raw":"METAR KSEA 301653Z 03007KT 10SM SCT015 SCT140 BKN250 13/09 A3014 RMK AO2 SLP212 SCT015 V BKN T01330089 $","temp":13.3,"dewpoint":8.9,"humidity":75,"wind":3.6,"precipObserved":false,"correctedAt":null,"originalRaw":null},{"obsTimeUtc":"2026-09-30T17:01:00.000Z","obsTimeLocal":"2026-09-30T10:01:00-07:00","metarType":"SPECI","raw":"SPECI KSEA 301701Z 36007KT 10SM BKN013 BKN140 BKN250 13/09 A3015 RMK AO2 T01330089 $","temp":13.3,"dewpoint":8.9,"humidity":75,"wind":3.6,"precipObserved":false,"correctedAt":null,"originalRaw":null},{"obsTimeUtc":"2026-09-30T17:53:00.000Z","obsTimeLocal":"2026-09-30T10:53:00-07:00","metarType":"METAR","raw":"METAR KSEA 301753Z 04008KT 10SM BKN014 BKN140 BKN250 13/09 A3014 RMK AO2 SLP212 T01330089 10139 20094 51008 $","temp":13.3,"dewpoint":8.9,"humidity":75,"wind":4.1,"precipObserved":false,"correctedAt":null,"originalRaw":null},{"obsTimeUtc":"2026-09-30T18:12:00.000Z","obsTimeLocal":"2026-09-30T11:12:00-07:00","metarType":"SPECI","raw":"SPECI KSEA 301812Z 01009KT 10SM SCT014 SCT140 BKN250 14/09 A3014 RMK AO2 SCT014 V BKN T01440094 $","temp":14.4,"dewpoint":9.4,"humidity":72,"wind":4.6,"precipObserved":false,"correctedAt":null,"originalRaw":null},{"obsTimeUtc":"2026-09-30T18:53:00.000Z","obsTimeLocal":"2026-09-30T11:53:00-07:00","metarType":"METAR","raw":"METAR KSEA 301853Z VRB06KT 10SM SCT016 SCT250 16/10 A3014 RMK AO2 SLP210 T01560100 $","temp":15.6,"dewpoint":10,"humidity":69,"wind":3.1,"precipObserved":false,"correctedAt":null,"originalRaw":null},{"obsTimeUtc":"2026-09-30T19:53:00.000Z","obsTimeLocal":"2026-09-30T12:53:00-07:00","metarType":"METAR","raw":"METAR KSEA 301953Z 35006KT 10SM FEW020 FEW250 16/09 A3014 RMK AO2 SLP210 T01610094 $","temp":16.1,"dewpoint":9.4,"humidity":64,"wind":3.1,"precipObserved":false,"correctedAt":null,"originalRaw":null},{"obsTimeUtc":"2026-09-30T20:53:00.000Z","obsTimeLocal":"2026-09-30T13:53:00-07:00","metarType":"METAR","raw":"METAR KSEA 302053Z 36009KT 10SM FEW023 FEW250 17/09 A3014 RMK AO2 SLP211 T01720089 55000 $","temp":17.2,"dewpoint":8.9,"humidity":58,"wind":4.6,"precipObserved":false,"correctedAt":null,"originalRaw":null},{"obsTimeUtc":"2026-09-30T21:53:00.000Z","obsTimeLocal":"2026-09-30T14:53:00-07:00","metarType":"METAR","raw":"METAR KSEA 302153Z 35007KT 10SM FEW026 FEW040 SCT230 17/09 A3011 RMK AO2 SLP201 T01720089 $","temp":17.2,"dewpoint":8.9,"humidity":58,"wind":3.6,"precipObserved":false,"correctedAt":null,"originalRaw":null},{"obsTimeUtc":"2026-09-30T22:53:00.000Z","obsTimeLocal":"2026-09-30T15:53:00-07:00","metarType":"METAR","raw":"METAR KSEA 302253Z 35007KT 10SM FEW020 FEW040 SCT230 18/08 A3009 RMK AO2 SLP196 T01780083 $","temp":17.8,"dewpoint":8.3,"humidity":54,"wind":3.6,"precipObserved":false,"correctedAt":null,"originalRaw":null},{"obsTimeUtc":"2026-09-30T23:53:00.000Z","obsTimeLocal":"2026-09-30T16:53:00-07:00","metarType":"METAR","raw":"METAR KSEA 302353Z 34006KT 10SM FEW040 FEW170 SCT230 18/09 A3008 RMK AO2 SLP192 T01780089 10183 20133 56019 $","temp":17.8,"dewpoint":8.9,"humidity":56,"wind":3.1,"precipObserved":false,"correctedAt":null,"originalRaw":null},{"obsTimeUtc":"2026-10-01T00:53:00.000Z","obsTimeLocal":"2026-09-30T17:53:00-07:00","metarType":"METAR","raw":"METAR KSEA 010053Z 34006KT 10SM FEW040 SCT170 BKN230 17/09 A3008 RMK AO2 SLP193 T01670094 $","temp":16.7,"dewpoint":9.4,"humidity":62,"wind":3.1,"precipObserved":false,"correctedAt":null,"originalRaw":null},{"obsTimeUtc":"2026-10-01T01:53:00.000Z","obsTimeLocal":"2026-09-30T18:53:00-07:00","metarType":"METAR","raw":"METAR KSEA 010153Z 34006KT 10SM FEW040 FEW110 SCT170 BKN230 14/08 A3009 RMK AO2 SLP194 ACSL DSNT SE T01440083 $","temp":14.4,"dewpoint":8.3,"humidity":67,"wind":3.1,"precipObserved":false,"correctedAt":null,"originalRaw":null},{"obsTimeUtc":"2026-10-01T02:53:00.000Z","obsTimeLocal":"2026-09-30T19:53:00-07:00","metarType":"METAR","raw":"METAR KSEA 010253Z 36007KT 10SM FEW040 SCT100 SCT160 BKN230 13/09 A3009 RMK AO2 SLP196 T01280089 53003 $","temp":12.8,"dewpoint":8.9,"humidity":77,"wind":3.6,"precipObserved":false,"correctedAt":null,"originalRaw":null},{"obsTimeUtc":"2026-10-01T03:53:00.000Z","obsTimeLocal":"2026-09-30T20:53:00-07:00","metarType":"METAR","raw":"METAR KSEA 010353Z 33004KT 10SM FEW100 FEW160 SCT230 12/08 A3010 RMK AO2 SLP198 T01170083 $","temp":11.7,"dewpoint":8.3,"humidity":80,"wind":2.1,"precipObserved":false,"correctedAt":null,"originalRaw":null},{"obsTimeUtc":"2026-10-01T04:53:00.000Z","obsTimeLocal":"2026-09-30T21:53:00-07:00","metarType":"METAR","raw":"METAR KSEA 010453Z 02008KT 10SM BKN120 BKN200 13/09 A3009 RMK AO2 SLP196 T01280089 $","temp":12.8,"dewpoint":8.9,"humidity":77,"wind":4.1,"precipObserved":false,"correctedAt":null,"originalRaw":null},{"obsTimeUtc":"2026-10-01T05:53:00.000Z","obsTimeLocal":"2026-09-30T22:53:00-07:00","metarType":"METAR","raw":"METAR KSEA 010553Z 36007KT 10SM SCT120 SCT200 12/09 A3010 RMK AO2 SLP198 T01220089 10178 20117 52002 $","temp":12.2,"dewpoint":8.9,"humidity":80,"wind":3.6,"precipObserved":false,"correctedAt":null,"originalRaw":null},{"obsTimeUtc":"2026-10-01T06:53:00.000Z","obsTimeLocal":"2026-09-30T23:53:00-07:00","metarType":"METAR","raw":"METAR KSEA 010653Z 03009KT 10SM BKN170 OVC200 13/09 A3009 RMK AO2 SLP196 T01280094 $","temp":12.8,"dewpoint":9.4,"humidity":80,"wind":4.6,"precipObserved":false,"correctedAt":null,"originalRaw":null}],"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). US markets usually settle on the official NWS CLI value instead - see the NWS CLI archive for this station; both values are shown side by side.","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/KSEA/YYYY-MM-DD (HTML) and https://weathermarket.io/api/station/KSEA/YYYY-MM-DD (JSON)."],"citation":"Settlement source: the METAR-derived station-day record for KSEA for the contract date (station-local calendar day), as published at https://weathermarket.io/station/KSEA/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/KSEA/2026-09-30","json":"https://weathermarket.io/api/station/KSEA/2026-09-30","record":"https://weathermarket.io/api/station/KSEA/2026-09-30?format=record","prev":"https://weathermarket.io/station/KSEA/2026-09-29","next":"https://weathermarket.io/station/KSEA/2026-10-01","station":"https://weathermarket.io/station/KSEA","external":{"iem":"https://mesonet.agron.iastate.edu/cgi-bin/request/asos.py?station=SEA&data=metar&year1=2026&month1=9&day1=30&year2=2026&month2=10&day2=2&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=KSEA&tipo=SA&ord=REV&nil=SI&fmt=html&ano=2026&mes=9&day=30&hora=7&anof=2026&mesf=10&dayf=1&horaf=6&minf=59&send=send","awcLive":"https://aviationweather.gov/data/metar/?ids=KSEA"}}}