Lookout

Sunset and sunrise color-quality forecasts for the contiguous United States. Enter a location and get a 0–100 score, a peak time, and a plain-language explanation of what's driving the forecast — overhead clouds, the corridor toward the sun, air clarity, and the anti-solar Belt of Venus.

This app requires JavaScript. The forecast data comes from NOAA GFS, NOAA GEFS-Aerosols, NOAA GEFS-Ensemble, and DWD ICON, decoded directly from GRIB and combined with a physics-grounded scoring transform (no blended forecast APIs).