Mt. Baker & Unkai (Sea Of Clouds)

I have been uploading a lot of pictures of the Pacific Ocean
I took during the vacation Rob-san and I made at the end of September.
I do hope everybody enjoyed them!
Today, I want to upload pictures of Unkai which means
"Sea Of Clouds" in Japanese.
If anybody knows the English word to explain these kind of clouds,
please please leave a comment!
Thanks!