◆ Built on free forecast-model data (Open-Meteo, incl. its ensemble API) and NASA EONET. The model selector on Storms/Extended Outlook lets you request GFS (NOAA) directly — as close to "direct GFS integration" as is honestly possible without parsing raw multi-GB GRIB2 files from NOAA's NOMADS server client-side. WRF has no equivalent: it's simulation software researchers run themselves, not a hosted data service, so there's no free public "WRF API" to integrate with, direct or otherwise. Radar/lightning-network/GNN+diffusion-model sources real nowcasting systems use need institutional access and GPU inference this app doesn't have.

◆ Orbits use real public orbital elements (CelesTrak), propagated with simplified circular Keplerian motion — not full SGP4, so positions are approximate rather than precision-tracking grade.