Looking at the dew point distribution across the UK today, that 'rope cloud' like structure appears to be a band of high cloud marking the boundary between fresher Atlantic sourced air and the continental air with its higher dewpoints. The two airmasses have been having a bit of a war for three days now, but with the high cloud having expanded during the afternoon while also becoming increasingly faint, it appears that the frontlines are starting to mingle - the airmasses are mixing together. If my interpretation is correct, we should see that boundary start to head back west again over the next 24 hours, and possibly become better defined again as the push from the east feeds in a new mass of continental air. I have to admit, I'd have preferred more mixing out to occur with a continued standoff, as that would have lowered the humidity more here in Reading. As it is, today feels about as clammy as the last few, with a dewpoint of 15*C and an air temp now past 25*C. I do wonder how all that low cloud in the North Sea will behave tonight - this morning saw some of that stuff over Reading, and it took until 11am to clear off. Looks nice and clear across Scandinavia though - and the easterly flow should bring that our way soon enough
Originally Posted by: Medlock Vale Weather