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Developers

Start, stop, and peak, every 10 minutes.

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Forecast horizon
3 h
Time step and refresh
10 min
Grid spacing
4 km
Inputs: NOAA MRMS, GOES
Radar + satellite

Four ways to receive the forecast

Each delivery carries the same forecast: rain rate every 10 minutes, three hours ahead, on a 4 km grid.

  • 01

    Site series

    For a venue, an airport, or a work site: rain rate at each 10-minute step, and when rain starts and stops.

    JSON · one call per site
    GET /nowcast/sites/{site_id}

{
  "issued": "2026-09-24T20:30Z",
  "step_min": 10,
  "horizon_min": 180,
  "rain_mm_h": [0.0, 0.4, 2.1, 6.3, …],
  "periods": [
    { "start": "20:50Z", "end": "21:40Z", "peak_mm_h": 6.3 }
  ]
}
  • 02

    Grid

    The forecast field for a bounding box or the whole domain, one frame per step, for your own models and dashboards.

    JSON, NetCDF, or GeoTIFF
    GET /nowcast/grid?bbox=-88.2,41.6,-87.5,42.1&format=netcdf

rain_rate(time: 18, y, x)   mm/h
grid: 4 km   step: 10 min
  • 03

    Map tiles

    A rain overlay for the map your team already runs, one layer per lead time.

    XYZ raster tiles
    /nowcast/tiles/{issued}/{lead_min}/{z}/{x}/{y}.png

lead_min: 10, 20, … 180
  • 04

    Threshold alert

    A push to your system when rain at a site crosses a rate you set, or when a start or stop enters the horizon.

    Webhook
    POST https://your-system.example/rain

{
  "site_id": "ramp-north",
  "event": "threshold_crossed",
  "at": "21:10Z",
  "threshold_mm_h": 4,
  "rate_mm_h": 6.3,
  "issued": "2026-09-24T20:30Z"
}

We implement this delivery for your sites when you engage. If the envelope has to match a system you already run, say so on the call.

Put the forecast in your system.

Tell us the decision, the sites, and where the forecast has to land.

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