Has there been any report on wind direction relative to the ridge?
Mary,
I don't know about the actual winds at the time and I have never flown anywhere in West Java other than as a passenger coming into Jakarta from the north.
However, as a glider pilot, I often looked very closely at the weather. You should bear in mind that Java is very close to the Equator and therefore in the doldrums. It is not likely that strong winds would develop in the Bogor area other than due to outflow from thunderstorms. I have seen stationary thunderstorms develop in one part of Jakarta, drop enough rain to cause one metre floods in the streets and then dissipate while less than a mile away it was sunny and dry!