Can't stand 'in the overnight period'. What's wrong with 'overnight' or 'tonight'? Also can't stand 'a rainy/sunny/windy old day' - no need to be quite so chummy when you're giving useful information, and the 'old' adds nothing IMO. Also, why the value judgements that some of the presenters give - not everybody thinks that a rainy day is always a bad thing, particularly farmers, gardeners and firefighters!
Having said that, the Scottish forecast at 6.55 is a must-watch, and I do like the presenters.