{
 "schema": "nephos.method.v1",
 "slug": "okeeffe-roof-with-snow-1917",
 "title": "Georgia O’Keeffe, Roof with Snow: testing Peck’s 11 March 1917",
 "urls": [
  "/studies/okeeffe-roof-with-snow-1917"
 ],
 "written": {
  "summary": "H. Daniel Peck (2007) dates the watercolor to early 1917 and, with a stated hedge, suggests an all-day snowfall on Sunday 11 March 1917 may have prompted it. The catalogue raisonné gives 1916 (CR 126).",
  "items": [
   {
    "quote": "O’Keeffe mentioned an all-day snowfall of Sunday, March 11, in a letter that day to Stieglitz.",
    "source": "Peck, American Art 21, no. 3 (2007), p. 106",
    "url": "https://doi.org/10.1086/526482"
   },
   {
    "quote": "it is tempting to speculate that the snowfall of March 11 inspired Roof with Snow; perhaps the sketches were painted that day.",
    "source": "Peck, p. 106",
    "url": "https://doi.org/10.1086/526482"
   },
   {
    "quote": "Abiquiú Notebooks dates 1917.",
    "source": "Access O’Keeffe, CR 126, General Remarks",
    "url": "https://access-ok.okeeffemuseum.org/object/7418/"
   }
  ]
 },
 "records": [
  {
   "name": "Amarillo City, WBAN 23075",
   "detail": "72 daily entries, 18 February to 30 April 1917, about 28 km from the house by archive coordinates. The later airport series is not substituted.",
   "url": "https://data.rcc-acis.org/StnData?params=%7B%22sid%22%3A%2223075%201%22%2C%22sdate%22%3A%221917-03-01%22%2C%22edate%22%3A%221917-03-31%22%2C%22elems%22%3A%5B%7B%22name%22%3A%22maxt%22%2C%22add%22%3A%22f%2Ct%2Ci%2Cn%2Cs%22%7D%2C%7B%22name%22%3A%22mint%22%2C%22add%22%3A%22f%2Ct%2Ci%2Cn%2Cs%22%7D%2C%7B%22name%22%3A%22pcpn%22%2C%22add%22%3A%22f%2Ct%2Ci%2Cn%2Cs%22%7D%2C%7B%22name%22%3A%22snow%22%2C%22add%22%3A%22f%2Ct%2Ci%2Cn%2Cs%22%7D%2C%7B%22name%22%3A%22snwd%22%2C%22add%22%3A%22f%2Ct%2Ci%2Cn%2Cs%22%7D%5D%2C%22meta%22%3A%22name%2Cll%2Csids%22%7D"
  }
 ],
 "gaps": [
  "The letters Peck and Von Lintel cite were not read; only their published quotations and dates.",
  "Snow depth is missing on all 72 dates. No Canyon observation or roof-cover record has been found."
 ],
 "tests": [
  {
   "claim": "Did snow or rain fall at Amarillo on Sunday 11 March 1917?",
   "result": "No: precipitation 0.00 in, new snow 0.0 in, high 73 °F, low 29 °F. 10 and 12 March were also dry."
  },
  {
   "claim": "How many dates from 18 February to 30 April 1917 have measurable snowfall at Amarillo?",
   "result": "1: 3 March (2.5 in). Traces on 1, 13 and 26 March and 1 April. April has none measurable."
  },
  {
   "claim": "Does this identify days when the painted roof held snow?",
   "result": "No. Snow can lie after it falls; snow depth was not reported, and no painting session is recorded."
  }
 ],
 "finding": "The record does not show snow on 11 March 1917. It does show 2.5 inches on 3 March, after the move. Neither date can be attached to the painting.",
 "verdicts": [
  {
   "claim": "Peck’s proposed day: an all-day snowfall on Sunday 11 March 1917",
   "verdict": "Contradicts",
   "reason": "Amarillo recorded no precipitation and a high of 73 °F that day, and none on 10 or 12 March. The verdict holds only if the letter is dated correctly and Amarillo, 28 km away, stands for Canyon."
  },
  {
   "claim": "Peck’s broader claim: a snowfall after the mid-February move could have been the occasion",
   "verdict": "Partially agrees",
   "reason": "2.5 inches fell at Amarillo on 3 March. The record cannot show which snow, if any, she painted; after 11 March it shows only traces."
  },
  {
   "claim": "The painted day",
   "verdict": "Unknown",
   "reason": "No object-linked session date, snow depth or roof record exists, and the 1916/1917 year remains disputed."
  }
 ],
 "limits": [
  "The catalogue-year disagreement remains open. The weather does not choose between 1916 and 1917.",
  "Peck dates the move to 18 February; Von Lintel’s timeline gives 5 February. Under the earlier date, Amarillo’s 2.2 inches of 14 February also fall after the move.",
  "Station distance gives context, not proof of identical local conditions. A local shower in Canyon cannot be fully excluded.",
  "The snowfall letter and the fine-day letter are both O’Keeffe’s, known here only through published quotations and dates."
 ]
}