{"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":"2026-10-18","window":{"date":"2026-10-18","timezone":"America/Los_Angeles","dayStartUtc":"2026-10-18T07:00:00.000Z","dayEndUtc":"2026-10-19T07:00:00.000Z","utcOffsetStart":"-07:00","utcOffsetEnd":"-07:00","hours":24},"complete":true,"values":{"tmax":15,"tmaxAt":"2026-10-18T22:53:00.000Z","tmin":6.1,"tminAt":"2026-10-18T14:32:00.000Z","tavg":9.3,"humidityMean":83,"windMean":2.9,"windMax":5.7,"windMaxAt":"2026-10-18T07:53:00.000Z","precipObservedCount":0,"nObservations":33,"maxGapMinutes":120,"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":"2026-10-18T22:53:00.000Z","obsTimeLocal":"2026-10-18T15:53:00-07:00","metarType":"METAR","raw":"METAR KSEA 182253Z 34006KT 10SM FEW080 BKN230 15/06 A3004 RMK AO2 SLP180 T01500056 $","temp":15,"dewpoint":5.6,"humidity":53,"wind":3.1,"precipObserved":false,"correctedAt":null,"originalRaw":null},"tmin":{"obsTimeUtc":"2026-10-18T14:32:00.000Z","obsTimeLocal":"2026-10-18T07:32:00-07:00","metarType":"SPECI","raw":"SPECI KSEA 181432Z 34004KT 1/2SM R16L/1200VP6000FT FG VV001 06/06 A3019 RMK AO2 T00610061 $","temp":6.1,"dewpoint":6.1,"humidity":100,"wind":2.1,"precipObserved":false,"correctedAt":null,"originalRaw":null},"windMax":{"obsTimeUtc":"2026-10-18T07:53:00.000Z","obsTimeLocal":"2026-10-18T00:53:00-07:00","metarType":"METAR","raw":"METAR KSEA 180753Z 06011KT 10SM CLR 10/06 A3024 RMK AO2 SLP246 T01000056 401670094","temp":10,"dewpoint":5.6,"humidity":74,"wind":5.7,"precipObserved":false,"correctedAt":null,"originalRaw":null}},"finality":{"status":"final","finalAt":"2026-10-19T10:00:00.000Z","settleable":false,"coverage":{"ok":false,"maxGapMinutes":120,"normalIntervalMin":60,"thresholdMinutes":90},"reasons":["coverage_gap: longest stretch without a report was 120 min, above 90 min (station normal interval 60 + 30)"],"holdHours":3},"revision":"06fcb97f4dc8cbc1","lastChangedAt":"2026-10-19T06:56:38.557Z","corrections":[],"anchor":{"contract":"0x2B59812947B48B5988FaA805a9514a5162415091","chainId":14,"record":"https://weathermarket.io/api/station/KSEA/2026-10-18?format=record","status":"anchored","sha256":"d3d7c6cbf457f473ec2161587d164ae93b6838b8df30769368add93f9fb198fd","revision":"06fcb97f4dc8cbc1","flareTxHash":"0x4ae62783c94956b0a8fb8ac3868e725c4ba0ad761453422d265885bc1dab8567","flareBlock":72471451,"anchoredAt":"2026-10-19T10:02:01.146Z","explorer":"https://flare-explorer.flare.network/tx/0x4ae62783c94956b0a8fb8ac3868e725c4ba0ad761453422d265885bc1dab8567","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":33,"suspect":0,"bad":0,"flagged":[]},"extremes":{"tmax":{"obsTimeUtc":"2026-10-18T22:53:00.000Z","flag":"good","reasons":[]},"tmin":{"obsTimeUtc":"2026-10-18T14:32:00.000Z","flag":"good","reasons":[]},"anyFlagged":false},"excludingBad":{"tmax":15,"tmin":6.1,"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":15.56,"tmin":6.11,"precip":0,"corrected":false,"issuedAt":"2026-10-19T08:27:00.000Z","html":"https://weathermarket.io/nws-cli/KSEA/2026-10-18","json":"https://weathermarket.io/api/nws-cli/KSEA/2026-10-18"},"observations":[{"obsTimeUtc":"2026-10-18T07:53:00.000Z","obsTimeLocal":"2026-10-18T00:53:00-07:00","metarType":"METAR","raw":"METAR KSEA 180753Z 06011KT 10SM CLR 10/06 A3024 RMK AO2 SLP246 T01000056 401670094","temp":10,"dewpoint":5.6,"humidity":74,"wind":5.7,"precipObserved":false,"correctedAt":null,"originalRaw":null},{"obsTimeUtc":"2026-10-18T08:53:00.000Z","obsTimeLocal":"2026-10-18T01:53:00-07:00","metarType":"METAR","raw":"METAR KSEA 180853Z 07008KT 10SM CLR 09/06 A3023 RMK AO2 SLP244 T00940056 58004","temp":9.4,"dewpoint":5.6,"humidity":77,"wind":4.1,"precipObserved":false,"correctedAt":null,"originalRaw":null},{"obsTimeUtc":"2026-10-18T09:53:00.000Z","obsTimeLocal":"2026-10-18T02:53:00-07:00","metarType":"METAR","raw":"METAR KSEA 180953Z 06005KT 10SM CLR 09/05 A3022 RMK AO2 SLP241 T00890050","temp":8.9,"dewpoint":5,"humidity":77,"wind":2.6,"precipObserved":false,"correctedAt":null,"originalRaw":null},{"obsTimeUtc":"2026-10-18T10:53:00.000Z","obsTimeLocal":"2026-10-18T03:53:00-07:00","metarType":"METAR","raw":"METAR KSEA 181053Z 06006KT 10SM CLR 09/06 A3021 RMK AO2 SLP237 T00890056","temp":8.9,"dewpoint":5.6,"humidity":80,"wind":3.1,"precipObserved":false,"correctedAt":null,"originalRaw":null},{"obsTimeUtc":"2026-10-18T11:53:00.000Z","obsTimeLocal":"2026-10-18T04:53:00-07:00","metarType":"METAR","raw":"METAR KSEA 181153Z 03006KT 10SM CLR 08/06 A3021 RMK AO2 SLP235 T00780056 10111 20078 56008","temp":7.8,"dewpoint":5.6,"humidity":86,"wind":3.1,"precipObserved":false,"correctedAt":null,"originalRaw":null},{"obsTimeUtc":"2026-10-18T12:53:00.000Z","obsTimeLocal":"2026-10-18T05:53:00-07:00","metarType":"METAR","raw":"METAR KSEA 181253Z 34003KT 10SM CLR 07/06 A3020 RMK AO2 SLP234 T00720056 $","temp":7.2,"dewpoint":5.6,"humidity":90,"wind":1.5,"precipObserved":false,"correctedAt":null,"originalRaw":null},{"obsTimeUtc":"2026-10-18T13:47:00.000Z","obsTimeLocal":"2026-10-18T06:47:00-07:00","metarType":"SPECI","raw":"SPECI KSEA 181347Z 02003KT 9SM SCT001 SCT010 07/06 A3020 RMK AO2 $","temp":7,"dewpoint":6,"humidity":93,"wind":1.5,"precipObserved":false,"correctedAt":null,"originalRaw":null},{"obsTimeUtc":"2026-10-18T13:53:00.000Z","obsTimeLocal":"2026-10-18T06:53:00-07:00","metarType":"METAR","raw":"METAR KSEA 181353Z 04004KT 7SM BCFG SCT001 SCT010 07/07 A3019 RMK AO2 SLP232 T00720067 $","temp":7.2,"dewpoint":6.7,"humidity":97,"wind":2.1,"precipObserved":false,"correctedAt":null,"originalRaw":null},{"obsTimeUtc":"2026-10-18T13:59:00.000Z","obsTimeLocal":"2026-10-18T06:59:00-07:00","metarType":"SPECI","raw":"SPECI KSEA 181359Z 04005KT 3SM BR BKN001 07/07 A3019 RMK AO2 T00720067 $","temp":7.2,"dewpoint":6.7,"humidity":97,"wind":2.6,"precipObserved":false,"correctedAt":null,"originalRaw":null},{"obsTimeUtc":"2026-10-18T14:21:00.000Z","obsTimeLocal":"2026-10-18T07:21:00-07:00","metarType":"SPECI","raw":"SPECI KSEA 181421Z 01004KT 1 1/2SM R16L/3500VP6000FT BR BKN001 07/07 A3019 RMK AO2 T00670067 $","temp":6.7,"dewpoint":6.7,"humidity":100,"wind":2.1,"precipObserved":false,"correctedAt":null,"originalRaw":null},{"obsTimeUtc":"2026-10-18T14:32:00.000Z","obsTimeLocal":"2026-10-18T07:32:00-07:00","metarType":"SPECI","raw":"SPECI KSEA 181432Z 34004KT 1/2SM R16L/1200VP6000FT FG VV001 06/06 A3019 RMK AO2 T00610061 $","temp":6.1,"dewpoint":6.1,"humidity":100,"wind":2.1,"precipObserved":false,"correctedAt":null,"originalRaw":null},{"obsTimeUtc":"2026-10-18T14:40:00.000Z","obsTimeLocal":"2026-10-18T07:40:00-07:00","metarType":"SPECI","raw":"SPECI KSEA 181440Z 33003KT 1/4SM R16L/1200V1400FT FG VV001 06/06 A3019 RMK AO2 T00610061 $","temp":6.1,"dewpoint":6.1,"humidity":100,"wind":1.5,"precipObserved":false,"correctedAt":null,"originalRaw":null},{"obsTimeUtc":"2026-10-18T14:44:00.000Z","obsTimeLocal":"2026-10-18T07:44:00-07:00","metarType":"SPECI","raw":"SPECI KSEA 181444Z 00000KT 2SM R16L/1200V1400FT BR BKN001 BKN070 06/06 A3019 RMK AO2 T00610061 $","temp":6.1,"dewpoint":6.1,"humidity":100,"wind":0,"precipObserved":false,"correctedAt":null,"originalRaw":null},{"obsTimeUtc":"2026-10-18T14:53:00.000Z","obsTimeLocal":"2026-10-18T07:53:00-07:00","metarType":"METAR","raw":"METAR KSEA 181453Z 04004KT 3SM R16L/1200VP6000FT BR SCT001 BKN005 BKN060 06/06 A3019 RMK AO2 SLP230 T00610061 56006 $","temp":6.1,"dewpoint":6.1,"humidity":100,"wind":2.1,"precipObserved":false,"correctedAt":null,"originalRaw":null},{"obsTimeUtc":"2026-10-18T15:21:00.000Z","obsTimeLocal":"2026-10-18T08:21:00-07:00","metarType":"SPECI","raw":"SPECI KSEA 181521Z 05005KT 1/2SM R16L/1400VP6000FT FG VV002 07/06 A3018 RMK AO2 T00670061 $","temp":6.7,"dewpoint":6.1,"humidity":96,"wind":2.6,"precipObserved":false,"correctedAt":null,"originalRaw":null},{"obsTimeUtc":"2026-10-18T15:33:00.000Z","obsTimeLocal":"2026-10-18T08:33:00-07:00","metarType":"SPECI","raw":"SPECI KSEA 181533Z 03006KT 1/4SM R16L/1000VP6000FT FG VV001 07/06 A3019 RMK AO2 T00670061 $","temp":6.7,"dewpoint":6.1,"humidity":96,"wind":3.1,"precipObserved":false,"correctedAt":null,"originalRaw":null},{"obsTimeUtc":"2026-10-18T15:53:00.000Z","obsTimeLocal":"2026-10-18T08:53:00-07:00","metarType":"METAR","raw":"METAR KSEA 181553Z 06004KT 2SM BR BKN001 BKN100 07/06 A3019 RMK AO2 SLP229 T00720061 $","temp":7.2,"dewpoint":6.1,"humidity":93,"wind":2.1,"precipObserved":false,"correctedAt":null,"originalRaw":null},{"obsTimeUtc":"2026-10-18T16:41:00.000Z","obsTimeLocal":"2026-10-18T09:41:00-07:00","metarType":"SPECI","raw":"SPECI KSEA 181641Z VRB04KT 7SM BKN001 BKN100 08/07 A3019 RMK AO2 T00780067 $","temp":7.8,"dewpoint":6.7,"humidity":93,"wind":2.1,"precipObserved":false,"correctedAt":null,"originalRaw":null},{"obsTimeUtc":"2026-10-18T16:45:00.000Z","obsTimeLocal":"2026-10-18T09:45:00-07:00","metarType":"SPECI","raw":"SPECI KSEA 181645Z VRB05KT 9SM SCT001 SCT010 BKN110 08/07 A3019 RMK AO2 T00780067 $","temp":7.8,"dewpoint":6.7,"humidity":93,"wind":2.6,"precipObserved":false,"correctedAt":null,"originalRaw":null},{"obsTimeUtc":"2026-10-18T16:53:00.000Z","obsTimeLocal":"2026-10-18T09:53:00-07:00","metarType":"METAR","raw":"METAR KSEA 181653Z 35004KT 10SM FEW001 SCT010 BKN110 08/07 A3018 RMK AO2 SLP229 T00780067 $","temp":7.8,"dewpoint":6.7,"humidity":93,"wind":2.1,"precipObserved":false,"correctedAt":null,"originalRaw":null},{"obsTimeUtc":"2026-10-18T17:53:00.000Z","obsTimeLocal":"2026-10-18T10:53:00-07:00","metarType":"METAR","raw":"METAR KSEA 181753Z 01007KT 10SM FEW005 FEW010 SCT160 11/06 A3017 RMK AO2 SLP224 T01110061 10111 20061 58006 $","temp":11.1,"dewpoint":6.1,"humidity":71,"wind":3.6,"precipObserved":false,"correctedAt":null,"originalRaw":null},{"obsTimeUtc":"2026-10-18T18:53:00.000Z","obsTimeLocal":"2026-10-18T11:53:00-07:00","metarType":"METAR","raw":"METAR KSEA 181853Z 01007KT 10SM FEW010 SCT200 13/05 A3015 RMK AO2 SLP217 T01280050 $","temp":12.8,"dewpoint":5,"humidity":59,"wind":3.6,"precipObserved":false,"correctedAt":null,"originalRaw":null},{"obsTimeUtc":"2026-10-18T19:53:00.000Z","obsTimeLocal":"2026-10-18T12:53:00-07:00","metarType":"METAR","raw":"METAR KSEA 181953Z 01007KT 10SM FEW060 BKN210 14/05 A3013 RMK AO2 SLP208 T01390050 $","temp":13.9,"dewpoint":5,"humidity":55,"wind":3.6,"precipObserved":false,"correctedAt":null,"originalRaw":null},{"obsTimeUtc":"2026-10-18T20:53:00.000Z","obsTimeLocal":"2026-10-18T13:53:00-07:00","metarType":"METAR","raw":"METAR KSEA 182053Z 03009KT 10SM FEW080 BKN230 14/06 A3009 RMK AO2 SLP197 T01440056 58026 $","temp":14.4,"dewpoint":5.6,"humidity":55,"wind":4.6,"precipObserved":false,"correctedAt":null,"originalRaw":null},{"obsTimeUtc":"2026-10-18T21:53:00.000Z","obsTimeLocal":"2026-10-18T14:53:00-07:00","metarType":"METAR","raw":"METAR KSEA 182153Z 36007KT 10SM FEW080 BKN230 14/06 A3007 RMK AO2 SLP187 T01440061 $","temp":14.4,"dewpoint":6.1,"humidity":57,"wind":3.6,"precipObserved":false,"correctedAt":null,"originalRaw":null},{"obsTimeUtc":"2026-10-18T22:53:00.000Z","obsTimeLocal":"2026-10-18T15:53:00-07:00","metarType":"METAR","raw":"METAR KSEA 182253Z 34006KT 10SM FEW080 BKN230 15/06 A3004 RMK AO2 SLP180 T01500056 $","temp":15,"dewpoint":5.6,"humidity":53,"wind":3.1,"precipObserved":false,"correctedAt":null,"originalRaw":null},{"obsTimeUtc":"2026-10-18T23:53:00.000Z","obsTimeLocal":"2026-10-18T16:53:00-07:00","metarType":"METAR","raw":"METAR KSEA 182353Z 35008KT 10SM FEW080 BKN230 14/06 A3003 RMK AO2 SLP174 T01390061 10156 20106 56022 $","temp":13.9,"dewpoint":6.1,"humidity":59,"wind":4.1,"precipObserved":false,"correctedAt":null,"originalRaw":null},{"obsTimeUtc":"2026-10-19T00:53:00.000Z","obsTimeLocal":"2026-10-18T17:53:00-07:00","metarType":"METAR","raw":"METAR KSEA 190053Z 35006KT 10SM FEW080 BKN230 12/07 A3000 RMK AO2 SLP166 T01220067 $","temp":12.2,"dewpoint":6.7,"humidity":69,"wind":3.1,"precipObserved":false,"correctedAt":null,"originalRaw":null},{"obsTimeUtc":"2026-10-19T01:53:00.000Z","obsTimeLocal":"2026-10-18T18:53:00-07:00","metarType":"METAR","raw":"METAR KSEA 190153Z 36007KT 10SM BKN230 11/07 A2999 RMK AO2 SLP162 T01060072 $","temp":10.6,"dewpoint":7.2,"humidity":79,"wind":3.6,"precipObserved":false,"correctedAt":null,"originalRaw":null},{"obsTimeUtc":"2026-10-19T02:53:00.000Z","obsTimeLocal":"2026-10-18T19:53:00-07:00","metarType":"METAR","raw":"METAR KSEA 190253Z 34007KT 10SM FEW080 BKN230 09/08 A2998 RMK AO2 SLP161 T00940078 56016 $","temp":9.4,"dewpoint":7.8,"humidity":90,"wind":3.6,"precipObserved":false,"correctedAt":null,"originalRaw":null},{"obsTimeUtc":"2026-10-19T03:53:00.000Z","obsTimeLocal":"2026-10-18T20:53:00-07:00","metarType":"METAR","raw":"METAR KSEA 190353Z 01007KT 10SM BKN170 09/08 A2997 RMK AO2 SLP156 T00940078 $","temp":9.4,"dewpoint":7.8,"humidity":90,"wind":3.6,"precipObserved":false,"correctedAt":null,"originalRaw":null},{"obsTimeUtc":"2026-10-19T04:53:00.000Z","obsTimeLocal":"2026-10-18T21:53:00-07:00","metarType":"METAR","raw":"METAR KSEA 190453Z 35006KT 10SM BKN170 10/07 A2997 RMK AO2 SLP156 T01000072 $","temp":10,"dewpoint":7.2,"humidity":83,"wind":3.1,"precipObserved":false,"correctedAt":null,"originalRaw":null},{"obsTimeUtc":"2026-10-19T06:53:00.000Z","obsTimeLocal":"2026-10-18T23:53:00-07:00","metarType":"METAR","raw":"METAR KSEA 190653Z 03006KT 10SM BKN170 OVC220 10/07 A2995 RMK AO2 SLP148 T01000072 $","temp":10,"dewpoint":7.2,"humidity":83,"wind":3.1,"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/2026-10-18","json":"https://weathermarket.io/api/station/KSEA/2026-10-18","record":"https://weathermarket.io/api/station/KSEA/2026-10-18?format=record","prev":"https://weathermarket.io/station/KSEA/2026-10-17","next":"https://weathermarket.io/station/KSEA/2026-10-19","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=10&day1=18&year2=2026&month2=10&day2=20&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=10&day=18&hora=7&anof=2026&mesf=10&dayf=19&horaf=6&minf=59&send=send","awcLive":"https://aviationweather.gov/data/metar/?ids=KSEA"}}}