On rare occasion it seems the clouds conspire to set the sky on fire. The longer path length of sunlight when the Sun is near or below the horizon acts to scatter out the shorter wavelength colors (blues and violets). In the absence of clouds or aerosols, the sunset (or sunrise) isn’t so remarkable. But if a mid-level cloud deck is positioned just right to capture the Sun’s final throes, as it was on this winter’s day, the sky is ignited in shades of scarlet and burnt sienna. Photo taken on January 13, 2012.