{
  "name": "Southerly Buster",
  "blurb": "Hot still afternoon, then a southerly change rolls through around the half-hour. Gusty but not vicious — a fair test of a first real rig.",
  "rating": 2,
  "seed": 30717,
  "duration": 90,

  "_ramp_comment": "The campaign's middle rung: sits between storm_01_gentle (peak ~11 m/s) and storm_02_wildnight (peak ~32). Sustained builds to ~13 (47 km/h), worst gust ~21 (76 km/h, BOM 'strong'). The change is real but slower and smaller than the wild night's, so a decent flat-ish rig can get away with it and a good twisted one is never in doubt — the storm that teaches the swing before the one that punishes it.",

  "baseCurve": [[0, 4.0], [12, 6.0], [30, 9.0], [45, 13.0], [65, 12.5], [90, 10.0]],

  "gusts": {
    "firstAt": 5,
    "minGap": 6,
    "maxGap": 12,
    "powBase": 3,
    "powRand": 4,
    "powRamp": 4,
    "downdraftOfTotal": 0.35
  },

  "_dir_comment": "Starts blowing toward the SE (a warm NW'er), swings to blow toward the NNE (a moderate southerly) across 30-36 s. ~90 deg, gentler slew than storm_02's buster.",

  "dirCurve": [[0, 0.8], [28, 0.9], [30, 0.55], [36, -0.7], [55, -0.85], [90, -0.75]],
  "dirWander": { "amp": 0.3, "rate": 0.11 },

  "spatial": { "amp": 0.18, "scale": 11, "advect": 0.5 },

  "events": [
    { "t": 30, "type": "windchange", "telegraph": 6, "over": 6, "text": "here comes the change" },
    { "t": 48, "type": "debris", "model": "BlackTub_v2", "lateral": 2.5, "mass": 5, "text": "a tub skitters across the lawn" },
    { "t": 62, "type": "lightning", "power": 0.4 }
  ],

  "_rain_comment": "peakMmPerHour 30 = moderate. The rain arrives WITH the change at t~30 and not before — dry hot afternoon, then the southerly brings the water, which is the story the curve is telling. Mean intensity ~0.28, so at decision 10's 40x it delivers ~8 mm = 0.8 cm: ~200 kg on a 25 m2 flat sail, ~0.5 kN/corner. That is the middle rung on purpose — enough that a flat rig on carabiners (1.2 kN) should feel the water once wind is added, not enough to drown a shackle. Ponding teaches here; it kills in storm_02.",

  "rain": { "peakMmPerHour": 30, "curve": [[0, 0], [28, 0.05], [34, 0.4], [55, 0.55], [80, 0.3], [90, 0.15]] },

  "_hail_comment": "One mild burst rolling in behind the change — small stones, half intensity. Enough that a bed under a sail visibly beats a bed in the open, but nothing like the wild night's ice. No gust-synced hail: this is the storm you can get away with a modest rig on. size 0.7 = pea hail.",

  "hail": {
    "size": 0.7,
    "bursts": [
      { "t": 36, "ramp": 1.5, "hold": 3, "fade": 2, "intensity": 0.5 }
    ]
  },

  "sky": { "darkness": 0.5, "cloudScroll": 0.05 }
}
