{ "slug": "thayer-winter-sunrise-monadnock-1917", "object": { "title": "Winter Sunrise, Monadnock", "accession": "17.180.1", "date": "1917" }, "window": { "start": "1917-10-15", "end": "1917-10-21", "days": 7, "basis": "Calendar interpretation of third week, 15–21 October; execution context only. No depicted day established." }, "station": { "id": "USC00274399", "name": "KEENE", "lat": 42.9389, "lon": -72.3247, "elevation_m": 155.8, "location_note": "Current GHCN inventory; historical instrument position not established." }, "daily": [ { "date": "1917-10-15", "tmin_c": 2.8, "tmax_c": 16.1, "tmin_f": 37, "tmax_f": 61, "raw_fields": { "TMAX": { "raw": 161, "mflag": " ", "qflag": " ", "sflag": "6", "value": 16.1, "reason": null }, "TMIN": { "raw": 28, "mflag": " ", "qflag": " ", "sflag": "6", "value": 2.8, "reason": null }, "PRCP": { "raw": 74, "mflag": " ", "qflag": " ", "sflag": "6", "value": 7.4, "reason": null }, "SNOW": { "value": null, "reason": "element_absent", "raw": null, "mflag": null, "qflag": null, "sflag": null }, "SNWD": { "value": null, "reason": "element_absent", "raw": null, "mflag": null, "qflag": null, "sflag": null } } }, { "date": "1917-10-16", "tmin_c": 0.0, "tmax_c": 16.7, "tmin_f": 32, "tmax_f": 62, "raw_fields": { "TMAX": { "raw": 167, "mflag": " ", "qflag": " ", "sflag": "6", "value": 16.7, "reason": null }, "TMIN": { "raw": 0, "mflag": " ", "qflag": " ", "sflag": "6", "value": 0.0, "reason": null }, "PRCP": { "raw": 0, "mflag": "P", "qflag": " ", "sflag": "6", "value": null, "reason": "missing_presumed_zero" }, "SNOW": { "value": null, "reason": "element_absent", "raw": null, "mflag": null, "qflag": null, "sflag": null }, "SNWD": { "value": null, "reason": "element_absent", "raw": null, "mflag": null, "qflag": null, "sflag": null } } }, { "date": "1917-10-17", "tmin_c": -3.9, "tmax_c": 13.9, "tmin_f": 25, "tmax_f": 57, "raw_fields": { "TMAX": { "raw": 139, "mflag": " ", "qflag": " ", "sflag": "6", "value": 13.9, "reason": null }, "TMIN": { "raw": -39, "mflag": " ", "qflag": " ", "sflag": "6", "value": -3.9, "reason": null }, "PRCP": { "raw": 0, "mflag": "P", "qflag": " ", "sflag": "6", "value": null, "reason": "missing_presumed_zero" }, "SNOW": { "value": null, "reason": "element_absent", "raw": null, "mflag": null, "qflag": null, "sflag": null }, "SNWD": { "value": null, "reason": "element_absent", "raw": null, "mflag": null, "qflag": null, "sflag": null } } }, { "date": "1917-10-18", "tmin_c": 3.3, "tmax_c": 15.0, "tmin_f": 38, "tmax_f": 59, "raw_fields": { "TMAX": { "raw": 150, "mflag": " ", "qflag": " ", "sflag": "6", "value": 15.0, "reason": null }, "TMIN": { "raw": 33, "mflag": " ", "qflag": " ", "sflag": "6", "value": 3.3, "reason": null }, "PRCP": { "raw": 3, "mflag": " ", "qflag": " ", "sflag": "6", "value": 0.3, "reason": null }, "SNOW": { "value": null, "reason": "element_absent", "raw": null, "mflag": null, "qflag": null, "sflag": null }, "SNWD": { "value": null, "reason": "element_absent", "raw": null, "mflag": null, "qflag": null, "sflag": null } } }, { "date": "1917-10-19", "tmin_c": 10.0, "tmax_c": 20.0, "tmin_f": 50, "tmax_f": 68, "raw_fields": { "TMAX": { "raw": 200, "mflag": " ", "qflag": " ", "sflag": "6", "value": 20.0, "reason": null }, "TMIN": { "raw": 100, "mflag": " ", "qflag": " ", "sflag": "6", "value": 10.0, "reason": null }, "PRCP": { "raw": 0, "mflag": "T", "qflag": " ", "sflag": "6", "value": null, "reason": "trace" }, "SNOW": { "value": null, "reason": "element_absent", "raw": null, "mflag": null, "qflag": null, "sflag": null }, "SNWD": { "value": null, "reason": "element_absent", "raw": null, "mflag": null, "qflag": null, "sflag": null } } }, { "date": "1917-10-20", "tmin_c": 4.4, "tmax_c": 18.9, "tmin_f": 40, "tmax_f": 66, "raw_fields": { "TMAX": { "raw": 189, "mflag": " ", "qflag": " ", "sflag": "6", "value": 18.9, "reason": null }, "TMIN": { "raw": 44, "mflag": " ", "qflag": " ", "sflag": "6", "value": 4.4, "reason": null }, "PRCP": { "raw": 74, "mflag": " ", "qflag": " ", "sflag": "6", "value": 7.4, "reason": null }, "SNOW": { "value": null, "reason": "element_absent", "raw": null, "mflag": null, "qflag": null, "sflag": null }, "SNWD": { "value": null, "reason": "element_absent", "raw": null, "mflag": null, "qflag": null, "sflag": null } } }, { "date": "1917-10-21", "tmin_c": -5.6, "tmax_c": 13.9, "tmin_f": 22, "tmax_f": 57, "raw_fields": { "TMAX": { "raw": 139, "mflag": " ", "qflag": " ", "sflag": "6", "value": 13.9, "reason": null }, "TMIN": { "raw": -56, "mflag": " ", "qflag": " ", "sflag": "6", "value": -5.6, "reason": null }, "PRCP": { "raw": 0, "mflag": "P", "qflag": " ", "sflag": "6", "value": null, "reason": "missing_presumed_zero" }, "SNOW": { "value": null, "reason": "element_absent", "raw": null, "mflag": null, "qflag": null, "sflag": null }, "SNWD": { "value": null, "reason": "element_absent", "raw": null, "mflag": null, "qflag": null, "sflag": null } } } ], "monthly_snow": { "source_sha256": "b611950058b020d42b03463f4042c76f7d3b22a3adc853d882e28544d265da22", "source_url": "https://www.ncei.noaa.gov/nerms/api/document/34AB3017348D48ABB4CB27E82B2AF0AB/download", "locator": "printed p. 76, PDF p. 4, Keene row, Total snowfall (unmelted) column", "station": "Keene", "month": "1917-10", "snowfall_in": 0, "verbatim": "0", "snow_depth": null, "snow_depth_reason": "not_reported_in_this_table" }, "regional_snow": { "source_sha256": "b611950058b020d42b03463f4042c76f7d3b22a3adc853d882e28544d265da22", "locator": "printed p. 75, PDF p. 3, General Summary", "date": "1917-10-12", "text": "Snow fell over a considerable portion of northern Maine, northern New Hampshire, and the mountain sections of northeastern Vermont on the 12th.", "locality_limit": "Monadnock is not named; this is before the execution window." }, "summary": { "min_f": 22, "max_f": 68, "below_freezing_days": [ "1917-10-17", "1917-10-21" ], "freezing_or_below_days": [ "1917-10-16", "1917-10-17", "1917-10-21" ] }, "sky": [ { "date": "1917-10-15", "source_sha256": "fa0b3e5017862a9fbb980f3e054ed6e57a854ba024e4a237bc82e860ee701ec9", "source_url": "https://library.oarcloud.noaa.gov/docs.lib/htdocs/rescue/dwm/1917/19171015.pdf", "locator": "PDF p. 1, Northeast station rings; central legend; 8 a.m., 75th-meridian time", "time": "08:00 EST", "albany": "cloudy", "boston": "cloudy", "local_sky": null, "local_sky_reason": "no_monadnock_or_dublin_station_on_map" }, { "date": "1917-10-16", "source_sha256": "90c2c731a9328d7b8779f3542c767d0b9e13882d4c80ef320f79617aa2f28e80", "source_url": "https://library.oarcloud.noaa.gov/docs.lib/htdocs/rescue/dwm/1917/19171016.pdf", "locator": "PDF p. 1, Northeast station rings; central legend; 8 a.m., 75th-meridian time", "time": "08:00 EST", "albany": "clear", "boston": "clear", "local_sky": null, "local_sky_reason": "no_monadnock_or_dublin_station_on_map" }, { "date": "1917-10-17", "source_sha256": "10e2ba4115fbe40009d52c5cd4650383d7507f0d517e548113a2612a00a1348f", "source_url": "https://library.oarcloud.noaa.gov/docs.lib/htdocs/rescue/dwm/1917/19171017.pdf", "locator": "PDF p. 1, Northeast station rings; central legend; 8 a.m., 75th-meridian time", "time": "08:00 EST", "albany": "clear", "boston": "clear", "local_sky": null, "local_sky_reason": "no_monadnock_or_dublin_station_on_map" }, { "date": "1917-10-18", "source_sha256": "e28f856f943708d44258dd69f961653ca45988fe799830c1f9ffd15e1b245fe4", "source_url": "https://library.oarcloud.noaa.gov/docs.lib/htdocs/rescue/dwm/1917/19171018.pdf", "locator": "PDF p. 1, Northeast station rings; central legend; 8 a.m., 75th-meridian time", "time": "08:00 EST", "albany": "cloudy", "boston": "cloudy", "local_sky": null, "local_sky_reason": "no_monadnock_or_dublin_station_on_map" }, { "date": "1917-10-19", "source_sha256": "f5970d15d879161b4ee1c965c539369b0604341b64f4029d602673334a0a0b5f", "source_url": "https://library.oarcloud.noaa.gov/docs.lib/htdocs/rescue/dwm/1917/19171019.pdf", "locator": "PDF p. 1, Northeast station rings; central legend; 8 a.m., 75th-meridian time", "time": "08:00 EST", "albany": "cloudy", "boston": "cloudy", "local_sky": null, "local_sky_reason": "no_monadnock_or_dublin_station_on_map" }, { "date": "1917-10-20", "source_sha256": "3f48b2f9bc10b932e6098ebdf9a3f33ba58777b79ec2738496a0e22938feb95b", "source_url": "https://library.oarcloud.noaa.gov/docs.lib/htdocs/rescue/dwm/1917/19171020.pdf", "locator": "PDF p. 1, Northeast station rings; central legend; 8 a.m., 75th-meridian time", "time": "08:00 EST", "albany": "cloudy", "boston": "cloudy", "local_sky": null, "local_sky_reason": "no_monadnock_or_dublin_station_on_map" }, { "date": "1917-10-21", "source_sha256": "505c204d205959927e1a1169515ef774b32767d130d36c86b2ad08bf30d6997b", "source_url": "https://library.oarcloud.noaa.gov/docs.lib/htdocs/rescue/dwm/1917/19171021.pdf", "locator": "PDF p. 1, Northeast station rings; central legend; 8 a.m., 75th-meridian time", "time": "08:00 EST", "albany": "clear", "boston": "clear", "local_sky": null, "local_sky_reason": "no_monadnock_or_dublin_station_on_map" } ], "solar": { "location": { "id": "USC00272136", "name": "DUBLIN", "lat": 42.9167, "lon": -72.0667, "elevation_m": 454.2, "location_note": "Current GHCN inventory; historical instrument position not established." }, "assumption": "Dublin locality proxy, not a verified easel location; level unobstructed horizon, solar centre −0.833°, EST (UTC−5); no terrain or cloud correction.", "method": "NOAA Solar Calculator / Meeus equations; Gregorian Julian day; bisection of geometric altitude.", "rows": [ { "date": "1917-10-15", "sunrise_est": "06:01", "utc_minutes": 661.089914, "azimuth_deg": 100.7, "map_after_sunrise_minutes": 119 }, { "date": "1917-10-16", "sunrise_est": "06:02", "utc_minutes": 662.282784, "azimuth_deg": 101.2, "map_after_sunrise_minutes": 118 }, { "date": "1917-10-17", "sunrise_est": "06:03", "utc_minutes": 663.480978, "azimuth_deg": 101.7, "map_after_sunrise_minutes": 117 }, { "date": "1917-10-18", "sunrise_est": "06:05", "utc_minutes": 664.684514, "azimuth_deg": 102.2, "map_after_sunrise_minutes": 115 }, { "date": "1917-10-19", "sunrise_est": "06:06", "utc_minutes": 665.893394, "azimuth_deg": 102.7, "map_after_sunrise_minutes": 114 }, { "date": "1917-10-20", "sunrise_est": "06:07", "utc_minutes": 667.107604, "azimuth_deg": 103.2, "map_after_sunrise_minutes": 113 }, { "date": "1917-10-21", "sunrise_est": "06:08", "utc_minutes": 668.327111, "azimuth_deg": 103.7, "map_after_sunrise_minutes": 112 } ] }, "rejected_candidates": [ { "id": "USC00272136", "name": "DUBLIN", "lat": 42.9167, "lon": -72.0667, "elevation_m": 454.2, "location_note": "Current GHCN inventory; historical instrument position not established.", "year": 1917, "usable": false, "reason": "no_1917_rows_in_downloaded_daily_file" }, { "id": "USC00276697", "name": "PETERBORO 2 S", "lat": 42.85, "lon": -71.95, "elevation_m": 310.9, "location_note": "Current GHCN inventory; historical instrument position not established.", "year": 1917, "usable": false, "reason": "no_1917_rows_in_downloaded_daily_file" } ], "witnesses": { "source_sha256": "bc71c2f6761f8930eeee0daa9b9962147e1a9955137db08d06aa9e10f7b735ca", "locator": "printed pp. 102–104; PDF pp. 143–145", "phrases": { "date": "third week of October 1917", "old_theme": "my old theme", "dawn": "winter dawn", "fresh": "too soon to retouch or varnish it" }, "basis": "Emma B. Thayer to John Gellatly, 26 November 1917, as described by the Met catalogue, p. 103; not a direct transcription of the manuscript." }, "unresolved": { "painted_day": null, "painted_day_reason": "execution_week_does_not_date_depicted_scene", "summit_snow": null, "summit_snow_reason": "no_local_snowfall_or_snow_depth_record_verified", "local_sunrise_sky": null, "local_sunrise_sky_reason": "regional_stations_observed_later", "viewing_direction": null, "viewing_direction_reason": "easel_site_and_canvas_bearing_not_established" }, "receipts": { "object": { "file": "thayer-winter-sunrise-monadnock-1917/met-object-browser.txt", "url": "https://www.metmuseum.org/art/collection/search/12786", "title": "The Met, Winter Sunrise, Monadnock, 17.180.1", "sha256": "7a807c7199bc2c6c0da0610d8c5a1fe60ad6028e8a5323b2a833b030b4b0f81d", "retrieved_at": "2026-10-15", "license": "Museum object text; brief quotations for research", "locator": "", "note": "Saved browser innerText, not downloaded HTML." }, "api": { "file": "thayer-winter-sunrise-monadnock-1917/met-api.json", "url": "https://collectionapi.metmuseum.org/public/collection/v1/objects/12786", "title": "The Met Collection API, object 12786", "sha256": "e87ee5c513bd55f5c9ebec571f57b3ce91a596e2e839cf3770a1a203cf1527dc", "retrieved_at": "2026-10-15", "license": "CC0 collection data", "locator": "isPublicDomain=true; accession 17.180.1" }, "rights": { "file": "thayer-winter-sunrise-monadnock-1917/met-rights-browser.txt", "url": "https://www.metmuseum.org/hubs/open-access", "title": "The Met, Open Access policy", "sha256": "62fd042beeb4ac84531a049b4840d8c91b0caf3a922c1201ee82d78dbf6c3286", "retrieved_at": "2026-10-15", "license": "Museum policy text; brief quotation", "locator": "", "note": "Saved browser innerText, not downloaded HTML." }, "image": { "file": "thayer-winter-sunrise-monadnock-1917/APS1318-original.jpg", "url": "https://images.metmuseum.org/CRDImages/ad/original/APS1318.jpg", "title": "The Met, full-resolution open image", "sha256": "4a21a3f6d952a855933ef23d971b5deebc1e6dd4d009e32df7b5db3875095241", "retrieved_at": "2026-10-15", "license": "Public domain artwork; Met Open Access CC0", "locator": "API primaryImage; reproduced without mirroring or cropping" }, "catalogue": { "file": "thayer-winter-sunrise-monadnock-1917/met-american-paintings-v3.pdf", "url": "https://cdn.sanity.io/files/cctd4ker/production/15bd0c79920937097b3316a939224159b1f0c453.pdf", "title": "Doreen Bolger Burke, American Paintings, vol. III (Met, 1980)", "sha256": "bc71c2f6761f8930eeee0daa9b9962147e1a9955137db08d06aa9e10f7b735ca", "retrieved_at": "2026-10-15", "license": "Publisher-provided research PDF; copyrighted text, no open republication licence", "locator": "pp. 102–104, PDF pp. 143–145; original letters not inspected" }, "monthly": { "file": "thayer-winter-sunrise-monadnock-1917/new-england-191710.pdf", "url": "https://www.ncei.noaa.gov/nerms/api/document/34AB3017348D48ABB4CB27E82B2AF0AB/download", "title": "US Weather Bureau, Climatological Data: New England, October 1917", "sha256": "b611950058b020d42b03463f4042c76f7d3b22a3adc853d882e28544d265da22", "retrieved_at": "2026-10-15", "license": "Public domain US federal publication", "locator": "pp. 75, 76, 78, 80; issued 19 November 1917" }, "stations": { "file": "thayer-winter-sunrise-monadnock-1917/ghcnd-stations.txt", "url": "https://www.ncei.noaa.gov/pub/data/ghcn/daily/ghcnd-stations.txt", "title": "NOAA GHCN-Daily station inventory", "sha256": "428eabc955883187935bce283766d5646e3ed7484b92eb0803874c0e8dd9b342", "retrieved_at": "2026-10-15", "license": "NOAA public data", "locator": "Keene, Dublin and Peterborough; present inventory is not verified 1917 location" }, "readme": { "file": "thayer-winter-sunrise-monadnock-1917/ghcnd-readme.txt", "url": "https://www.ncei.noaa.gov/pub/data/ghcn/daily/readme.txt", "title": "NOAA GHCN-Daily format and flag definitions", "sha256": "0e4e6f0e6947cf1add884c328a01760f31c56ef5fb86b85ed57dd5dc4c4aeaa6", "retrieved_at": "2026-10-15", "license": "NOAA public data", "locator": "Fixed-width .dly fields, units, missing and trace codes" }, "keene": { "file": "thayer-winter-sunrise-monadnock-1917/USC00274399.dly", "url": "https://www.ncei.noaa.gov/pub/data/ghcn/daily/all/USC00274399.dly", "title": "NOAA GHCN-Daily, Keene (USC00274399)", "sha256": "ec824d45d4c4aebc8222afba29fe27fbbae211faf455f9fe7546ba4bf578cb3b", "retrieved_at": "2026-10-15", "license": "NOAA public observations", "locator": "1917 search; Keene 15–21 October used" }, "dublin": { "file": "thayer-winter-sunrise-monadnock-1917/USC00272136.dly", "url": "https://www.ncei.noaa.gov/pub/data/ghcn/daily/all/USC00272136.dly", "title": "NOAA GHCN-Daily, Dublin (USC00272136)", "sha256": "99a915117a40ef9ec5a5d379b5ce59f19ddb4c5450ba0d7043efeb440569364e", "retrieved_at": "2026-10-15", "license": "NOAA public observations", "locator": "1917 search; Keene 15–21 October used" }, "peterborough": { "file": "thayer-winter-sunrise-monadnock-1917/USC00276697.dly", "url": "https://www.ncei.noaa.gov/pub/data/ghcn/daily/all/USC00276697.dly", "title": "NOAA GHCN-Daily, Peterborough (USC00276697)", "sha256": "f69e0302a324f8d8fb50ac8e5b626594f8f55f741c4269dd441a5ae4509edb3b", "retrieved_at": "2026-10-15", "license": "NOAA public observations", "locator": "1917 search; Keene 15–21 October used" }, "map-15": { "file": "thayer-winter-sunrise-monadnock-1917/map-19171015.pdf", "url": "https://library.oarcloud.noaa.gov/docs.lib/htdocs/rescue/dwm/1917/19171015.pdf", "title": "US Weather Bureau daily map, 15 October 1917", "sha256": "fa0b3e5017862a9fbb980f3e054ed6e57a854ba024e4a237bc82e860ee701ec9", "retrieved_at": "2026-10-15", "license": "Public domain US federal publication", "locator": "PDF p. 1, 8 a.m. 75th-meridian time; Albany and Boston sky rings" }, "map-16": { "file": "thayer-winter-sunrise-monadnock-1917/map-19171016.pdf", "url": "https://library.oarcloud.noaa.gov/docs.lib/htdocs/rescue/dwm/1917/19171016.pdf", "title": "US Weather Bureau daily map, 16 October 1917", "sha256": "90c2c731a9328d7b8779f3542c767d0b9e13882d4c80ef320f79617aa2f28e80", "retrieved_at": "2026-10-15", "license": "Public domain US federal publication", "locator": "PDF p. 1, 8 a.m. 75th-meridian time; 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ideal horizon" }, "solar-method": { "file": "thayer-winter-sunrise-monadnock-1917/solar-details.html", "url": "https://gml.noaa.gov/grad/solcalc/calcdetails.html", "title": "NOAA Solar Calculator method and limitations", "sha256": "3da7e18c6d2a9e4b0070214cdda1ab3d6fa02c3e700f0b4964982e355ce891ef", "retrieved_at": "2026-10-15", "license": "NOAA public resource", "locator": "Meeus solar equations; ideal horizon" } } }