hi 150,
the weather in march up the top is unstable and you can expect widespread thunderstorms, showers and associated poor visibility and unstable conditions.
quite often conditions in the first half of the day can be quite good but things can deteriorate rapidly by afternoon with fast developing cbs and associated poor weather.
It's just a matter of using all the resources available to you in determining what the conditions are like, the Bom are most helpful in Oz and will provide you with up to date weather conditions over the phone or requested briefings via fax...usual common sense stuff, make sure you plan for alternates and carry adequate fuel etc.
and have fun!!!
