If I feed PwsWD from a Meteobridge will that provide that needed fields?
I regret that I do not know anything about the Meteobridge. . . I use Weather Display software to calculate all these useful extras and feed data to my PWS Dashboard (url as left, go to Live Pages in the menu).
However, the link I gave you is to the main support forum (PWS Dashboard at Weather-Watch Forum), so you could try a search there.