Derecho turns raw weather into the numbers you actually use. Density altitude, winds aloft surface-to-3km, 16-day forecasts flagged against the 30-year normal, real-time lightning with proximity alerts, cloud base and icing layers, AQI with pollen, snowpack, waves and tides, Milky Way windows — all tied to exactly where you are. Built for pilots, shooters, skiers, photographers, surfers, and anyone whose day depends on the sky. MGRS coordinates, glanceable widgets, push alerts the moment NWS issues them.