Hi 
I found current grib files for the north sea on a german site. I was able to open them on squid (program of greatcircle) but the normal pase of 30 minutes became half days it seems. 2 days ago i made the update for squid and now I got an message error saying the result is zero and therefore they can't be opened anymore.
The predict wind app can't open them either.
can I stil use them on expedition for routing  purposes ? is there a option to change the grib viewing passe or Someting like that? 
the gribs are  sorted on yyyymmdd systhem and here is the link to the files: ftp://ftp.bsh.de/Stroemungsvorhersagen/grib2/