The two weather forecasting models utilised by Weather Intelligence are an implementation of the Weather Research and Forecasting – Advanced Research and Weather (WRF-ARW) model (WICAST), as a primary forecast, and the Australian Digital Forecast Database (ADFD), as a backup system.
WICAST is initialised daily producing a 7-day forecast at an hourly time step. The modelling domain extends from 105°E to 160°E and 8°S to 45°S encompassing a significant portion of the oceans to better resolve the generation of tropical weather systems. The resolution of the model is 12 km. WICAST receives its initial and boundary conditions (IBCs) from the Global Forecast System (GFS) model, which already contains data assimilated from the Australian WMO monitoring sites, as well as satellite and upper air soundings.
The ADFD operates continuously as an alternative weather forecasting product. It contains the official BOM weather forecast elements produced from multiple models and they are controlled by the BOM’s operational meteorologists. Unlike WICAST, ADFD does not make solar radiation data available to the public, therefore a clear-day assumption is considered to estimate solar radiation.