Group: Forum Members
I can answer my own question now:
Austrocontrol issues the first GAFOR diurnal at 5AM (Zulu Time), but it's valid only as of 6AM. Basically Slovenian GAFOR is the same: issuing time 5AM, valid as of 6AM.
I planned my route at 5:15AM, what was not in range of validity of both GAFOR. Pushing the new weather slider to 6AM, the Austrian GAFOR routes popped up as well
Nevertheless strange: Same range of validity for both GAFOR reports; one shows up, the other not