Listening to the local radio station this morning at work (switiching it off if anyone came to the door!) Yes, I was working too, I can do two things at once! I heard a lovely expression.
The interviewer had been talking to some gardeners and then got on to talking about the weather, and asked why it had been colder last night than the night before. The answer given him was that there had been a "duvet of clouds" over the county the night before, but that last night there wasn`t. I`d heard of a blanket of cloudcover before, but never heard of it being a duvet.
It gave me a lovely picture in my mind of white fluffy clouds being purposely spread out overhead to snuggle the earth in.