{
  "zone": [
    85.55,
    28.48,
    85.68,
    28.58
  ],
  "zone_km2": 144.55,
  "method": "Sentinel-2 L2A. Liquid water = NIR < 0.1 and SWIR < 0.1, clusters >= 4800 m2, scenes with at least 35% clear over the zone.",
  "reference_2025": {
    "lake": "Purepu Glacier supraglacial",
    "from_km2": 0.08,
    "to_km2": 0.69,
    "window": "9 May to 6 Jul 2025"
  },
  "verdict": "A water body of some size was present. Growth pattern needs inspecting before calling it a precursor.",
  "series": [
    {
      "date": "2026-04-01",
      "clear": 0.937,
      "water_km2": 0.0,
      "largest_m2": 0
    },
    {
      "date": "2026-04-04",
      "clear": 1.0,
      "water_km2": 0.0,
      "largest_m2": 0
    },
    {
      "date": "2026-04-06",
      "clear": 0.414,
      "water_km2": 0.0,
      "largest_m2": 0
    },
    {
      "date": "2026-04-06",
      "clear": 0.364,
      "water_km2": 0.0,
      "largest_m2": 0
    },
    {
      "date": "2026-04-09",
      "clear": 0.77,
      "water_km2": 0.0,
      "largest_m2": 0
    },
    {
      "date": "2026-04-11",
      "clear": 0.985,
      "water_km2": 0.0052,
      "largest_m2": 5200
    },
    {
      "date": "2026-04-13",
      "clear": 0.991,
      "water_km2": 0.5124,
      "largest_m2": 333200
    },
    {
      "date": "2026-04-14",
      "clear": 0.71,
      "water_km2": 0.0,
      "largest_m2": 0
    },
    {
      "date": "2026-04-16",
      "clear": 0.992,
      "water_km2": 0.2428,
      "largest_m2": 224800
    },
    {
      "date": "2026-04-21",
      "clear": 0.982,
      "water_km2": 0.0964,
      "largest_m2": 96400
    },
    {
      "date": "2026-04-24",
      "clear": 0.984,
      "water_km2": 0.0,
      "largest_m2": 0
    },
    {
      "date": "2026-04-26",
      "clear": 0.778,
      "water_km2": 0.0,
      "largest_m2": 0
    },
    {
      "date": "2026-04-26",
      "clear": 0.763,
      "water_km2": 0.0,
      "largest_m2": 0
    },
    {
      "date": "2026-05-01",
      "clear": 0.949,
      "water_km2": 0.0,
      "largest_m2": 0
    },
    {
      "date": "2026-05-03",
      "clear": 0.351,
      "water_km2": 0.0,
      "largest_m2": 0
    },
    {
      "date": "2026-05-04",
      "clear": 0.88,
      "water_km2": 0.0,
      "largest_m2": 0
    },
    {
      "date": "2026-05-11",
      "clear": 0.986,
      "water_km2": 0.0,
      "largest_m2": 0
    },
    {
      "date": "2026-05-14",
      "clear": 0.875,
      "water_km2": 0.0,
      "largest_m2": 0
    },
    {
      "date": "2026-05-16",
      "clear": 0.999,
      "water_km2": 0.0,
      "largest_m2": 0
    },
    {
      "date": "2026-05-16",
      "clear": 0.97,
      "water_km2": 0.0,
      "largest_m2": 0
    },
    {
      "date": "2026-05-19",
      "clear": 0.974,
      "water_km2": 0.0,
      "largest_m2": 0
    },
    {
      "date": "2026-05-21",
      "clear": 1.0,
      "water_km2": 0.0,
      "largest_m2": 0
    },
    {
      "date": "2026-05-23",
      "clear": 0.965,
      "water_km2": 0.0,
      "largest_m2": 0
    },
    {
      "date": "2026-05-24",
      "clear": 0.838,
      "water_km2": 0.0,
      "largest_m2": 0
    },
    {
      "date": "2026-05-26",
      "clear": 0.722,
      "water_km2": 0.0596,
      "largest_m2": 33200
    },
    {
      "date": "2026-06-03",
      "clear": 0.853,
      "water_km2": 0.0,
      "largest_m2": 0
    },
    {
      "date": "2026-06-05",
      "clear": 0.965,
      "water_km2": 0.0,
      "largest_m2": 0
    },
    {
      "date": "2026-06-08",
      "clear": 0.658,
      "water_km2": 0.0,
      "largest_m2": 0
    },
    {
      "date": "2026-06-10",
      "clear": 0.567,
      "water_km2": 0.0,
      "largest_m2": 0
    },
    {
      "date": "2026-06-12",
      "clear": 0.589,
      "water_km2": 1.4312,
      "largest_m2": 1082800
    },
    {
      "date": "2026-06-13",
      "clear": 0.776,
      "water_km2": 0.0,
      "largest_m2": 0
    },
    {
      "date": "2026-06-15",
      "clear": 0.998,
      "water_km2": 0.0,
      "largest_m2": 0
    },
    {
      "date": "2026-06-18",
      "clear": 0.805,
      "water_km2": 0.0,
      "largest_m2": 0
    },
    {
      "date": "2026-06-20",
      "clear": 0.508,
      "water_km2": 0.0996,
      "largest_m2": 99600
    },
    {
      "date": "2026-06-23",
      "clear": 0.821,
      "water_km2": 0.0,
      "largest_m2": 0
    },
    {
      "date": "2026-07-10",
      "clear": 0.544,
      "water_km2": 0.0,
      "largest_m2": 0
    },
    {
      "date": "2026-07-20",
      "clear": 0.659,
      "water_km2": 0.0,
      "largest_m2": 0
    },
    {
      "date": "2026-07-22",
      "clear": 0.424,
      "water_km2": 1.0292,
      "largest_m2": 561600
    },
    {
      "date": "2026-08-14",
      "clear": 0.504,
      "water_km2": 0.0,
      "largest_m2": 0
    },
    {
      "date": "2026-08-24",
      "clear": 0.714,
      "water_km2": 0.0,
      "largest_m2": 0
    },
    {
      "date": "2026-08-24",
      "clear": 0.756,
      "water_km2": 0.0,
      "largest_m2": 0
    }
  ]
}