Design Rainfall

Enter a location in Australia to get the revised design rainfall depths (IFD) and the regional preburst and postburst rainfall statistics for that location. All data is free to use. The IFD grids are described in the IFD methodology report and the preburst and postburst statistics in the FMA 2026 paper.

Download IFD grids

Full Australian IFD grids as GeoTIFFs, one file per duration from 5 min to 168 hr. 1 km cells in GDA94 / Australian Albers (EPSG:3577), with one band per AEP (63.21%, 50%, 39.35%, 20%, 18.13%, 10%, 5%, 2%, 1%, 0.5%, 0.2%, 0.1%, 0.05%). Depths are in mm. The method and its validation are documented in the IFD methodology report.