{
 "dataset": {
  "id": "nrcs-snowpack",
  "sourceId": "nrcs",
  "name": "SNOTEL: 1 April Snow Water Equivalent, Percent of Median",
  "description": "Idaho statewide snow water equivalent on 1 April each year, as a percent of the 1991-2020 median, computed from every active NRCS SNOTEL station in Idaho.",
  "url": "https://www.nrcs.usda.gov/resources/data-and-reports/snow-and-water-interactive-map",
  "methodologyUrl": "https://wcc.sc.egov.usda.gov/reports/UpdateReport.html?report=Idaho",
  "dataUrl": "https://wcc.sc.egov.usda.gov/awdbRestApi/services/v1/data",
  "geography": "Idaho, statewide",
  "timeCoverage": "1981-2026",
  "updateFrequency": "Annual",
  "retrieved": "2026-09-08",
  "license": "Public domain. U.S. federal government work.",
  "ingestion": "scripts/fetch-nrcs-snowpack.py",
  "caveats": [
   "This is a statewide figure, not a per-basin one: NRCS publishes a live per-basin index in its Idaho SNOTEL Snowpack Update Report, but that report only serves the current day and its station-to-basin grouping is not exposed in the AWDB REST API, so a trustworthy historical per-basin series could not be built. This value instead applies NRCS's own documented basin-index formula statewide: the sum of each station's 1 April reading divided by the sum of each station's median for that day, times 100.",
   "The median is NRCS's own per-station median for 1 April, calculated over 1991-2020 (or fewer years for a station without a full 30-year record); each station needs at least 10 years of record before NRCS gives it a median at all.",
   "The number of stations contributing changes year to year as Idaho's SNOTEL network has grown; years before 1981 are excluded because fewer than 10 stations had a valid median that early. Each observation's note field records how many stations were used that year.",
   "Values are rounded to the nearest whole percent."
  ],
  "metrics": [
   {
    "id": "water.snowpack_pct_median",
    "name": "Snow water equivalent, percent of median",
    "unit": "percent",
    "description": "1 April snow water equivalent as a percent of the 1991-2020 median, aggregated statewide across active SNOTEL stations.",
    "aggregation": "rate"
   }
  ]
 },
 "observations": [
  {
   "metric": "water.snowpack_pct_median",
   "geo": "16",
   "period": "1981",
   "periodType": "year",
   "value": 76,
   "status": "estimate",
   "category": "Idaho",
   "note": "Statewide index computed from 24 SNOTEL stations."
  },
  {
   "metric": "water.snowpack_pct_median",
   "geo": "16",
   "period": "1982",
   "periodType": "year",
   "value": 164,
   "status": "estimate",
   "category": "Idaho",
   "note": "Statewide index computed from 51 SNOTEL stations."
  },
  {
   "metric": "water.snowpack_pct_median",
   "geo": "16",
   "period": "1983",
   "periodType": "year",
   "value": 149,
   "status": "estimate",
   "category": "Idaho",
   "note": "Statewide index computed from 57 SNOTEL stations."
  },
  {
   "metric": "water.snowpack_pct_median",
   "geo": "16",
   "period": "1984",
   "periodType": "year",
   "value": 120,
   "status": "estimate",
   "category": "Idaho",
   "note": "Statewide index computed from 59 SNOTEL stations."
  },
  {
   "metric": "water.snowpack_pct_median",
   "geo": "16",
   "period": "1985",
   "periodType": "year",
   "value": 116,
   "status": "estimate",
   "category": "Idaho",
   "note": "Statewide index computed from 62 SNOTEL stations."
  },
  {
   "metric": "water.snowpack_pct_median",
   "geo": "16",
   "period": "1986",
   "periodType": "year",
   "value": 115,
   "status": "estimate",
   "category": "Idaho",
   "note": "Statewide index computed from 62 SNOTEL stations."
  },
  {
   "metric": "water.snowpack_pct_median",
   "geo": "16",
   "period": "1987",
   "periodType": "year",
   "value": 72,
   "status": "estimate",
   "category": "Idaho",
   "note": "Statewide index computed from 65 SNOTEL stations."
  },
  {
   "metric": "water.snowpack_pct_median",
   "geo": "16",
   "period": "1988",
   "periodType": "year",
   "value": 83,
   "status": "estimate",
   "category": "Idaho",
   "note": "Statewide index computed from 65 SNOTEL stations."
  },
  {
   "metric": "water.snowpack_pct_median",
   "geo": "16",
   "period": "1989",
   "periodType": "year",
   "value": 122,
   "status": "estimate",
   "category": "Idaho",
   "note": "Statewide index computed from 67 SNOTEL stations."
  },
  {
   "metric": "water.snowpack_pct_median",
   "geo": "16",
   "period": "1990",
   "periodType": "year",
   "value": 83,
   "status": "estimate",
   "category": "Idaho",
   "note": "Statewide index computed from 67 SNOTEL stations."
  },
  {
   "metric": "water.snowpack_pct_median",
   "geo": "16",
   "period": "1991",
   "periodType": "year",
   "value": 90,
   "status": "estimate",
   "category": "Idaho",
   "note": "Statewide index computed from 69 SNOTEL stations."
  },
  {
   "metric": "water.snowpack_pct_median",
   "geo": "16",
   "period": "1992",
   "periodType": "year",
   "value": 64,
   "status": "estimate",
   "category": "Idaho",
   "note": "Statewide index computed from 69 SNOTEL stations."
  },
  {
   "metric": "water.snowpack_pct_median",
   "geo": "16",
   "period": "1993",
   "periodType": "year",
   "value": 104,
   "status": "estimate",
   "category": "Idaho",
   "note": "Statewide index computed from 70 SNOTEL stations."
  },
  {
   "metric": "water.snowpack_pct_median",
   "geo": "16",
   "period": "1994",
   "periodType": "year",
   "value": 68,
   "status": "estimate",
   "category": "Idaho",
   "note": "Statewide index computed from 71 SNOTEL stations."
  },
  {
   "metric": "water.snowpack_pct_median",
   "geo": "16",
   "period": "1995",
   "periodType": "year",
   "value": 115,
   "status": "estimate",
   "category": "Idaho",
   "note": "Statewide index computed from 71 SNOTEL stations."
  },
  {
   "metric": "water.snowpack_pct_median",
   "geo": "16",
   "period": "1996",
   "periodType": "year",
   "value": 114,
   "status": "estimate",
   "category": "Idaho",
   "note": "Statewide index computed from 72 SNOTEL stations."
  },
  {
   "metric": "water.snowpack_pct_median",
   "geo": "16",
   "period": "1997",
   "periodType": "year",
   "value": 167,
   "status": "estimate",
   "category": "Idaho",
   "note": "Statewide index computed from 72 SNOTEL stations."
  },
  {
   "metric": "water.snowpack_pct_median",
   "geo": "16",
   "period": "1998",
   "periodType": "year",
   "value": 94,
   "status": "estimate",
   "category": "Idaho",
   "note": "Statewide index computed from 72 SNOTEL stations."
  },
  {
   "metric": "water.snowpack_pct_median",
   "geo": "16",
   "period": "1999",
   "periodType": "year",
   "value": 146,
   "status": "estimate",
   "category": "Idaho",
   "note": "Statewide index computed from 72 SNOTEL stations."
  },
  {
   "metric": "water.snowpack_pct_median",
   "geo": "16",
   "period": "2000",
   "periodType": "year",
   "value": 108,
   "status": "estimate",
   "category": "Idaho",
   "note": "Statewide index computed from 73 SNOTEL stations."
  },
  {
   "metric": "water.snowpack_pct_median",
   "geo": "16",
   "period": "2001",
   "periodType": "year",
   "value": 54,
   "status": "estimate",
   "category": "Idaho",
   "note": "Statewide index computed from 75 SNOTEL stations."
  },
  {
   "metric": "water.snowpack_pct_median",
   "geo": "16",
   "period": "2002",
   "periodType": "year",
   "value": 116,
   "status": "estimate",
   "category": "Idaho",
   "note": "Statewide index computed from 78 SNOTEL stations."
  },
  {
   "metric": "water.snowpack_pct_median",
   "geo": "16",
   "period": "2003",
   "periodType": "year",
   "value": 94,
   "status": "estimate",
   "category": "Idaho",
   "note": "Statewide index computed from 78 SNOTEL stations."
  },
  {
   "metric": "water.snowpack_pct_median",
   "geo": "16",
   "period": "2004",
   "periodType": "year",
   "value": 92,
   "status": "estimate",
   "category": "Idaho",
   "note": "Statewide index computed from 79 SNOTEL stations."
  },
  {
   "metric": "water.snowpack_pct_median",
   "geo": "16",
   "period": "2005",
   "periodType": "year",
   "value": 71,
   "status": "estimate",
   "category": "Idaho",
   "note": "Statewide index computed from 79 SNOTEL stations."
  },
  {
   "metric": "water.snowpack_pct_median",
   "geo": "16",
   "period": "2006",
   "periodType": "year",
   "value": 134,
   "status": "estimate",
   "category": "Idaho",
   "note": "Statewide index computed from 79 SNOTEL stations."
  },
  {
   "metric": "water.snowpack_pct_median",
   "geo": "16",
   "period": "2007",
   "periodType": "year",
   "value": 77,
   "status": "estimate",
   "category": "Idaho",
   "note": "Statewide index computed from 80 SNOTEL stations."
  },
  {
   "metric": "water.snowpack_pct_median",
   "geo": "16",
   "period": "2008",
   "periodType": "year",
   "value": 129,
   "status": "estimate",
   "category": "Idaho",
   "note": "Statewide index computed from 80 SNOTEL stations."
  },
  {
   "metric": "water.snowpack_pct_median",
   "geo": "16",
   "period": "2009",
   "periodType": "year",
   "value": 105,
   "status": "estimate",
   "category": "Idaho",
   "note": "Statewide index computed from 80 SNOTEL stations."
  },
  {
   "metric": "water.snowpack_pct_median",
   "geo": "16",
   "period": "2010",
   "periodType": "year",
   "value": 75,
   "status": "estimate",
   "category": "Idaho",
   "note": "Statewide index computed from 81 SNOTEL stations."
  },
  {
   "metric": "water.snowpack_pct_median",
   "geo": "16",
   "period": "2011",
   "periodType": "year",
   "value": 127,
   "status": "estimate",
   "category": "Idaho",
   "note": "Statewide index computed from 81 SNOTEL stations."
  },
  {
   "metric": "water.snowpack_pct_median",
   "geo": "16",
   "period": "2012",
   "periodType": "year",
   "value": 112,
   "status": "estimate",
   "category": "Idaho",
   "note": "Statewide index computed from 81 SNOTEL stations."
  },
  {
   "metric": "water.snowpack_pct_median",
   "geo": "16",
   "period": "2013",
   "periodType": "year",
   "value": 80,
   "status": "estimate",
   "category": "Idaho",
   "note": "Statewide index computed from 81 SNOTEL stations."
  },
  {
   "metric": "water.snowpack_pct_median",
   "geo": "16",
   "period": "2014",
   "periodType": "year",
   "value": 107,
   "status": "estimate",
   "category": "Idaho",
   "note": "Statewide index computed from 81 SNOTEL stations."
  },
  {
   "metric": "water.snowpack_pct_median",
   "geo": "16",
   "period": "2015",
   "periodType": "year",
   "value": 50,
   "status": "estimate",
   "category": "Idaho",
   "note": "Statewide index computed from 81 SNOTEL stations."
  },
  {
   "metric": "water.snowpack_pct_median",
   "geo": "16",
   "period": "2016",
   "periodType": "year",
   "value": 105,
   "status": "estimate",
   "category": "Idaho",
   "note": "Statewide index computed from 81 SNOTEL stations."
  },
  {
   "metric": "water.snowpack_pct_median",
   "geo": "16",
   "period": "2017",
   "periodType": "year",
   "value": 120,
   "status": "estimate",
   "category": "Idaho",
   "note": "Statewide index computed from 81 SNOTEL stations."
  },
  {
   "metric": "water.snowpack_pct_median",
   "geo": "16",
   "period": "2018",
   "periodType": "year",
   "value": 101,
   "status": "estimate",
   "category": "Idaho",
   "note": "Statewide index computed from 80 SNOTEL stations."
  },
  {
   "metric": "water.snowpack_pct_median",
   "geo": "16",
   "period": "2019",
   "periodType": "year",
   "value": 110,
   "status": "estimate",
   "category": "Idaho",
   "note": "Statewide index computed from 81 SNOTEL stations."
  },
  {
   "metric": "water.snowpack_pct_median",
   "geo": "16",
   "period": "2020",
   "periodType": "year",
   "value": 101,
   "status": "estimate",
   "category": "Idaho",
   "note": "Statewide index computed from 81 SNOTEL stations."
  },
  {
   "metric": "water.snowpack_pct_median",
   "geo": "16",
   "period": "2021",
   "periodType": "year",
   "value": 93,
   "status": "estimate",
   "category": "Idaho",
   "note": "Statewide index computed from 81 SNOTEL stations."
  },
  {
   "metric": "water.snowpack_pct_median",
   "geo": "16",
   "period": "2022",
   "periodType": "year",
   "value": 75,
   "status": "estimate",
   "category": "Idaho",
   "note": "Statewide index computed from 81 SNOTEL stations."
  },
  {
   "metric": "water.snowpack_pct_median",
   "geo": "16",
   "period": "2023",
   "periodType": "year",
   "value": 125,
   "status": "estimate",
   "category": "Idaho",
   "note": "Statewide index computed from 80 SNOTEL stations."
  },
  {
   "metric": "water.snowpack_pct_median",
   "geo": "16",
   "period": "2024",
   "periodType": "year",
   "value": 92,
   "status": "estimate",
   "category": "Idaho",
   "note": "Statewide index computed from 81 SNOTEL stations."
  },
  {
   "metric": "water.snowpack_pct_median",
   "geo": "16",
   "period": "2025",
   "periodType": "year",
   "value": 109,
   "status": "estimate",
   "category": "Idaho",
   "note": "Statewide index computed from 80 SNOTEL stations."
  },
  {
   "metric": "water.snowpack_pct_median",
   "geo": "16",
   "period": "2026",
   "periodType": "year",
   "value": 54,
   "status": "estimate",
   "category": "Idaho",
   "note": "Statewide index computed from 81 SNOTEL stations."
  }
 ]
}