WOW, as far as I am aware, has no standards whatsoever so all, and I really mean all, data coming from WOW is suspect.

MetO climate sites, including Copley, report through WOW. The are subject to regular MetO site visits and instrument checks. They are also run by dedicated observers. Our data is hardly suspect and probably more accurate than many MetO AWS systems! We have very high standards.

Ken
Copley climate site
Teesdale