MetO have already shifted their position, as they had yellows out for Thursday night into Friday morning, around midday today. Now that has moved well into Friday AM, and given the warming push I would think North of Brum would be good for some early snowfall, down here, as you say there's a distinct lack of cold air, and given we are due rain for 90% of Thursday, the ground will be far too damp for anything to settle, whilst temps remain too high.