Hi Max,
I hardly doubt that theres is something like a standard for this.
Generally the thing is avoid these.
But in close terms in practice i.e. how far to avoid,on which side to pass for planning purposes is a company thing.
Tropical storms are not a easy thing to predict.
But there are certain sources like the NOAA Hurricane Center,AccuWaether Hurricane Center or the atlantic tropical weather center which gives you predictions on the movment direction,rainfall,windgusts an so on.
Judgement and Interpretation of this is a Dispatcher/Pilots own thing.
Everybody judges different.
But to sensitize your staff about the pontential danger of Tropical Storms should be in your Companies hands.
greetz
AJ