About the Model
OWWL is a forecasting system designed to predict waves, water levels, and wave overtopping hazard around the South West coast of the UK. The model is updated once a day, and provides three-day forecasts. The system uses a 1-km resolution hydrodynamic (wave, currents, and water levels) Delft3D model, which is forced by a larger Met Office model, providing 2D spectral wave data, water levels, and currents along the four model boundaries, and the entire domain is forced with gridded wind and pressure data at 7-km resolution.
Watch a fly-through of the model, and learn about how it is powered and the forecasts it can generate below.
The findings generated by the OWWL model are presented as two different types of forecast report: a wave and water level forecast (named Inshore Coastal Wave Forecast), and a wave runup and overtopping forecast (Wave Overtopping Forecast).
Inshore Coastal Wave Forecast
The Inshore Coastal Wave Forecast shows the forecasted wave conditions, water levels, and wind conditions for the next three days. At some locations, recently recorded wave and water level data from the Channel Coastal Observatory are shown alongside the SWEEP-OWWL data for the (hindcasted) first 12 hours, to provide ground-truthing of the model data.
Wave Overtopping Forecast
The Wave Overtopping Forecast shows the maximum predicted hazard over the 3-day forecast period. Each area is colour coded to indicate the severity of the potential hazard from green (low hazard) through to red (hazard to pedestrians, property and vehicles).
This information is accessible in a variety of ways:
The OWWL model is available to anyone, live, on the Channel Coastal Observatory website.
For detailed daily forecasts of hour-by-hour wave overtopping hazards for specifics locations, an email alert service is available. The free service requires users to register on the CCO website.