Does anybody know why today and I believe Saturday, Wizzair planes have been flying to Maastricht?
Usually at this time of the year there's a couple of inbound diversions from a fog-bound Eindhoven, but this is not the case for these. Today (27th March) alone there have been arrivals (and departures back to) Katowice, Cluj, Podgorica and Budapest. The diverts typically position back to Eindhoven and pick up their schedule. Not the case here (+ Eindhoven isn't fog bound today).
They seem to stay around 40 minutes, so they are not visiting the paintshop which is the usual source of inbound commercial airliners from companies not usually flying from here.