What had been the start of a spectacular sunrise was yet again ruined by incoming clouds.
Can't count how many times this has happened. AAARRRRRGGGGGHHHHHHHHHHHH!!!!!!!!!!!!

Must be some meteorological explanation for it. Perhaps just as the sun is
rising and starting to warm the air, this causes a drop in air pressure?
Has happened too often to be a random occurrence.

Photographed in the Sonoran Desert west of Tucson, Arizona USA.