More precisely, in addition to what @Yves70 said, have you tried and compared the 3 weather models that you have available in Queensland, I mean ECMWF, GFS and ICON? And METEOBLUE as Meteogram?
I must add that thunderstorms and convective rains are very difficult to forecast for global models. There are better local models with higher resolution which are more efficient for this type of prediction but they are not available worldwide.