The model is everything. yr.no quoted by Matt uses the ECMWF model and it predicts cloud with high accuracy over much of the Central West NSW. I have used it with great success over a wide area from Yass out through Young Cowra, Bathurst, West Wyalong, Parkes and Dubbo. It works with remarkable accuracy over the southwest slopes and plains. I have found ACCESS provides better predictions from Canberra east and south through the ranges.
You need to find the right model for your region.
Joe
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