Data Sources
Understanding the meteorological data sources behind Athenium APIs
| Source | Resolution | Coverage | Period | Used by |
|---|
| ERA5 | 15km | Global | 1950-present | gridded_history_15km, Atlas API |
| GFS | 15km CONUS / 30km global | Global | Forecast + recent analysis | forecast, Atlas API |
| MRMS | 1km | CONUS | 2015-present | precipitation_location |
| Stage IV | 4km | CONUS | 2002-present | precipitation_location |
| Satellite precip | 8km | Global | 2000-present | precipitation_location |
| Network | Variables | Station count | Used by |
|---|
| METAR/ASOS | Temperature, wind, precip, ceiling, visibility | ~2,000 (US) | station_historical_data |
| MADIS | Multi-source surface obs | ~30,000 (US) | station_historical_data |
| Source | Resolution | Description |
|---|
| Athenium contours | 1-4km | Proprietary hail, tornado, and wind contours |
| NOAA SPC | Point reports | Ground-truth storm reports |
Athenium risk scores are derived from proprietary models trained on 50+ years of historical severe weather data, FEMA flood maps, and wildfire occurrence records.
