I was in Pomona, Ca., over the weekend for an aviation event. The weather turned for the worse on Saturday with a huge cold front coming in from the north. These two pictures are text book examples of Standing Lenticular Clouds, which mean very high winds. An aviators sign to STAY AWAY. The mountains in the background are approximately 9,000 so the clouds are 10,000+. Thought I would share these classic cloud images.
CF