Precip Live Weather Server

Serves all LAYERS.md layers via precip-readers. Hybrid layers fall back to R2 for ingested data.

Live Bands (hourly)

Band	Sources (fallback order)
`precip`	HRDPA 0700/0100 → URMA+MRMS blend → MRMS Pass2/1/Radar → HRDPS → HRRR → NAM
`temperature`	URMA → RTMA → RTMA-RU → HRRR AK/CONUS obs → HRDPS → HRRR forecast
`wind_speed`, `wind_direction`, `wind_speed_gust`	URMA → RTMA → HRRR
`cloud_cover`, `pressure`, `dew_point`	URMA → RTMA → HRRR
`specific_humidity`, `relative_humidity`	URMA → RTMA
`precip_type`	HRRR CONUS/AK obs → forecast → HRDPS → NAM
`slr`	HRRR CONUS/AK obs → HRDPS → HRRR forecast
`DSWRF`	HRRR CONUS/AK obs
`rqi`	MRMS RadarAccumQualityIndex
`precip_rate`	MRMS PrecipRate (2-min)
`sfcheadsubrt`	NWM analysis → short-range → medium-range
`zwattablrt`	NWM analysis
`SOILSAT_TOP`	NWM analysis → medium-range
`RSM_0`, `RSM_1`	NWM SOIL_M + POLARIS theta_s/theta_r
`MUD_0`	NWM SOIL_M + POLARIS clay
`temp_0-10cm`, `vsm_0-10cm`, etc.	SPoRT LIS

Daily Bands

Band	Sources
`snow_depth`	SNODAS + CaLDAS
`vsm_0-10cm`	SPoRT + CaLDAS
`precip`	HRDPA 24H + MRMS 24H Pass2
`rsm_0-10cm`	SPoRT

API

GET /api/v3/{layer_id}?longitude=-98&latitude=39&start=...&end=...
    → GeoJSON FeatureCollection with a `hours`/`days` time array.
    layer_id: e.g. "temperature-hourly", "hourly/APCP",
             "snow-depth-snodas-daily", "precip-rate/2min/precip".

GET /api/v3/hourly?band=temperature&longitude=-98&latitude=39
    → legacy alias; equivalent to /api/v3/temperature-hourly.

GET /api/v3/map/{layer_id}/ImageServer/tile/{z}/{y}/{x}
        ?renderingRule={...}&time={startMs,endMs}&mosaicRule={...}
    → 256×256 RGBA PNG. renderingRule must be a Colormap with an
      explicit `colorMap` stop list (what `makeRenderingRule` emits
      in packages/shared/layers/raster.ts).

GET /tzarr/{target}/{z}/{band}/.zarray
GET /tzarr/{target}/{z}/{band}/{tc}.{ty}.{tx}
GET /health