Overview
Weather forecast for a US location from the National Weather Service (public-domain, no key, commercial OK). Accepts EITHER {lat, lon} OR a US {address} (auto-geocoded). Returns normalized forecast periods with temperature in Celsius and Fahrenheit, precipitation probability, wind, and short/detailed text. Set `hourly: true` for hourly periods and `days: N` (1-7) to limit the horizon. The {address} must be a US STREET address (number + street); a bare city name does not geoco