Clouds at Sunset

I drive east from my street to get to the grocery store.  When I parked my car at the store I was facing west and couldn't believe my eyes.  These spectacular clouds were in the sky to the west and the sun had just set.  So I got out of my car and took a camera out of the trunk and started walking around the parking lot to find the best view.  This one was not bad!  Not sure what kind of clouds these are but I might guess Alto Cumulus.  But I will send a copy of this to my friend George and he will know.  As I walked to the store, I saw a woman who had gotten out of her car, and she had her phone up to her eyes and was photographing them as well.  Meanwhile a number of others were walking to and from their cars and never seemed to notice.  I spoke to the woman with the phone and congratulated her for both noticing and then photographing this spectacular scene.