Data sources
Each condition keeps its own source and precision.
We do not pretend that mixed environmental datasets describe one perfectly precise backyard point.
- Source families
- 5
- Precision
- Kept separate
- Freshness
- Checked independently
Weather and official alerts
National Weather Service / NOAA hourly forecasts, forecast grids, and point-relevant active alerts. Forecast grids are roughly 2.5 km and are rechecked as their validity and cache guidance allow.
Air quality
Flagship public pages prefer normalized AirNow current conditions and outlooks. Where no sufficiently fresh reporting area is close enough, the page uses a clearly labeled modeled US AQI outlook from Open-Meteo and the Copernicus Atmosphere Monitoring Service global forecast. EPA AirData supports history, monitor normals, and seasonality. Google Air Quality may enrich an explicit planner request but is not the public-page source of record.
Wildfire smoke and fire context
NOAA Hazard Mapping System identifies satellite-observed smoke aloft; HRRR-Smoke supplies modeled movement; NIFC WFIGS supplies fire context. These signals remain separate from ground-level AQI and durable smoke climatology.
UV and daylight
EPA Envirofacts supplies current-day ZIP-associated UV where available. Open-Meteo supplies clearly labeled modeled gaps and later periods under CC BY 4.0. Daylight is calculated from the selected coordinates and time.
Place search
OpenStreetMap Nominatim is used only after an explicit search or location action—never for autocomplete or bulk generation.
Stored conditions and freshness
Public place pages read normalized records produced by signed scheduled ingestion; rendering does not fan out to providers. Each weather, alert, air-quality, and smoke record ages independently. Last-verified values remain labeled only until their hard or legal expiry, after which they are withheld.
Freshness and failure
If a required source cannot be checked, the integrated recommendation is withheld. Source attribution, retrieved times, forecast timezone, ruleset version, and material limitations remain visible with each result.