Rainfall drives flooding, obviously. However, the speed, extent, and duration of flooding is often a function of the upstream moisture conditions in the catchment before the event. Looking just at a single rainfall event in isolation of the catchment context may lead to inaccurate conclusions, poor planning and in the worst case inadequate emergency response. MIKE SHE is a continuous, whole-of-catchment model that can even use distributed, radar-rainfall data. You can calibrate the model to both dry and wet season responses, giving you increased reliability during all storm events. MIKE SHE models have been operationalize around the world for on-line, continuous flood forecasting.