For probs less than 30, I only discovered recently that there are Aerodrome Briefings available from BoM/ ASA for ml, sy, ph, bn and ad that include a plain text decode of the taf as well as listing chances of ts, fog, etc, that are considered less than 30%. It's quite a handy bit of extra information and worth checking out.
Having said that, I have no idea what it happened to say on the day of this fog.