Thanks a lot I appreciate it.
Most definitions I can find on the net have ‘heavy rain’ defined as more than 7.6ml/hr
I note that YSSY had 13ml between 1:30 and 2:30 local today and the ATIS was saying RA and down to 2000m vis.
So that was heavy rain.
Shame that don’t put +RA on the ATIS seeing as many airline ops manuals have specific runway requirements for landing in heavy rain.
Especially with the friction notams on the shorter runway. W/S and crosswind.