Why no fog?
One for the weather buffs:
I live in central England - and have been expecting to awake to fog these past few mornings - but nope. Nothing. Is this because the dew point is below freezing and so water vapour sublimates directly to its solid state, ie frost? or is there another piece to the jigsaw I'm missing?
Also, what is different about tomorrow morning that widespread fog is (or was when I last looked) now predicted?