A large dissipating thunderstorm that has mammatus clouds and streaks stretching upwards. The underside is very dark and hangs over distant mountains and the city of San Luis Obispo, California. I am walking up a wide, sunny dirt trail on Cerro San Luis Obispo.

A large dissipating thunderstorm that has mammatus clouds and streaks stretching upwards. The underside is very dark and hangs over distant mountains and the city of San Luis Obispo, California. I am walking up a wide, sunny dirt trail on Cerro San Luis Obispo.