2b:null 2c:["$","title",null,{"children":"Boston White Christmases | Garrett Dash Nelson | Observable"}] 31:[{"id":"e0a9d57f6685add8d6c068d71296c77d454ef2a8b97aea77539d87a093bbfa5b9e976b0d3a8692b05abaaaa8cbc358470391a3f90169929976dca3657fa31acf","href":"https://static.observableusercontent.com/files/e0a9d57f6685add8d6c068d71296c77d454ef2a8b97aea77539d87a093bbfa5b9e976b0d3a8692b05abaaaa8cbc358470391a3f90169929976dca3657fa31acf","name":"blue_hills_climate_data.csv","type":"text/csv","lastModified":1703442102071.105,"size":790870}] 2f:{"id":"ff44e96411c46e6c","slug":"boston-white-christmases","title":"Boston White Christmases","thumbnail":"ee06ec9d7f61529a527e16d4d901f9bb0b9debcc9c12a2b21eea4b98ed907d66","access_level":"public","create_time":"$D2023-12-24T18:20:53.795Z","update_time":"$D2023-12-29T18:31:28.726Z","view_time":null,"first_public_time":"$D2023-12-24T18:20:53.795Z","fork":false,"stars":1,"starred":false,"owner":{"type":"team","id":"541364bd2c8d8c52","login":"garrettdashnelson","name":"Garrett Dash Nelson","avatar_url":"https://avatars-next.observableusercontent.com/33ce89b730302af2e9a2fcd7b01614e3ade3a7468ad833f73dfaf72ac94775b1","tier":"starter_2024"},"version":202,"publish_version":null,"role":null,"authored":false,"authors":[{"type":"individual","id":"6b5d1d1f8356ab3f","login":"garrettdashnelson","name":"Garrett Dash Nelson","avatar_url":"https://avatars-next.observableusercontent.com/33ce89b730302af2e9a2fcd7b01614e3ade3a7468ad833f73dfaf72ac94775b1","tier":null}],"members":[{"type":"individual","id":"6b5d1d1f8356ab3f","login":"garrettdashnelson","name":"Garrett Dash Nelson","avatar_url":"https://avatars-next.observableusercontent.com/33ce89b730302af2e9a2fcd7b01614e3ade3a7468ad833f73dfaf72ac94775b1","tier":null,"role":"editor"}],"comments":[],"custom_thumbnail":false,"trashed":false,"lapsed":null,"subscribed":null,"forks":0,"collection":null,"type":"notebook","body":{"title":"Boston White Christmases","cells":[{"id":0,"value":"# Boston White Christmases\n## ... or, the snowiness of the 10 days around Christmas\n\nIn my own lifetime, I feel like I've seen fewer and fewer snowy Christmases, but does that really match up with the data? I've seen a handful of analyses looking at how likely a given place is to have snow cover on Christmas Day itself. But it occurred to me that the feeling of \"White Christmas\" isn't just about the conditions on December 25 proper—it's about how the days around Christmas feel as well. \n\nHere I've visualized the five days before Christmas and the four days after it, to look at a picture of snowfall in the 10 days centered on Christmas Day. The data is from the [Blue Hill weather station](https://www.ncdc.noaa.gov/cdo-web/datasets/GHCND/stations/GHCND:USC00190736/detail) just south of Boston, and the timing covers my lifetime, from 1986 to the present. In each row, the red circle represents Christmas Day proper.","pinned":false,"hidden":false,"mode":"md","author":"$undefined","summary":"$undefined","output":"","database":"$undefined"},{"id":70,"value":"viz = {\n let i = 0;\n let increment = 20;\n\n let v = html`

`\n let rows = d3.select(v).selectAll('tr')\n .data(dates)\n .enter()\n .append('div')\n .attr('class','entry-row')\n .html(rowBuilder)\n\n return v;\n}","pinned":false,"hidden":false,"mode":"ojs","author":"$undefined","summary":"$undefined","output":"$undefined","database":"$undefined"},{"id":180,"value":"---","pinned":false,"hidden":false,"mode":"md","author":"$undefined","summary":"$undefined","output":"","database":"$undefined"},{"id":99,"value":"function rowBuilder(d) {\n\n let h = `${d.year}${ d.days.map(svgBuilder).join(\"\") }`\n return h\n}","pinned":false,"hidden":false,"mode":"ojs","author":"$undefined","summary":"$undefined","output":"$undefined","database":"$undefined"},{"id":135,"value":"function svgBuilder(d) {\n return ``\n}","pinned":false,"hidden":false,"mode":"ojs","author":"$undefined","summary":"$undefined","output":"$undefined","database":"$undefined"},{"id":158,"value":" sizingFunction =\n d3.scaleSqrt(d3.extent(blue_hills_climate_data.map(d=>d.SNWD)),[0,15])","pinned":false,"hidden":false,"mode":"ojs","author":"$undefined","summary":"$undefined","output":"$undefined","database":"$undefined"},{"id":50,"value":"dates = d3.range(1986,2023).map(d=> {return {year: d, days: yearExploder(d)}})","pinned":false,"hidden":false,"mode":"ojs","author":"$undefined","summary":"$undefined","output":"$undefined","database":"$undefined"},{"id":47,"value":"function lookupSnow(d) {\n return blue_hills_climate_data.find(n => n.DATE === d.toISOString().split(\"T\")[0]).SNWD\n}","pinned":false,"hidden":false,"mode":"ojs","author":"$undefined","summary":"$undefined","output":"$undefined","database":"$undefined"},{"id":13,"value":"function yearExploder(y) {\n return d3.timeDay.every(1).range(new Date(y, 11, 20), new Date(y, 11, 30))\n}","pinned":false,"hidden":false,"mode":"ojs","author":"$undefined","summary":"$undefined","output":"$undefined","database":"$undefined"},{"id":3,"value":"blue_hills_climate_data = await FileAttachment(\"blue_hills_climate_data.csv\").csv({typed: \"auto\"})","pinned":true,"hidden":false,"mode":"ojs","author":"$undefined","summary":"$undefined","output":"blue_hills_climate_data","database":"$undefined"},{"id":104,"value":"","pinned":false,"hidden":false,"mode":"html","author":"$undefined","summary":"$undefined","output":"","database":"$undefined"}],"files":"$W31","stdlib":"1","titling":"auto"}} 30:"$2f:body"