In CWMS, a forecast is a model run computed for a specific time window with a unique set of boundary conditions. Forecasts are created and edited in the Modeling module. Before you begin a forecast, you need to setup your Program Order, create Model Alternatives, and, assign Model Alternative Keys. You should also check your critical data and make sure it is available for the time window of your forecast (Data Status Summary).


Typical Forecasting Workflow:

  1. Check your data in the Acquisition module.
    1. Validate data, fill in missing data values.
    2. Confirm that critical data are available during your time window.
  2. Review current status of watershed in the Visualization module.
    1. Plot observed data (reservoir elevations, downstream flows, etc.)
    2. Animate gridded datasets, such as observed and forecasted precipitation. 
  3. Create a new forecast in the Modeling module.
    1. Select the appropriate time window.
    2. Choose the necessary forecast alternative(s) that you wish to run.
    3. Confirm that the data extracted correctly and completely.
  4. Compute the forecast in the Modeling module.
    1. Confirm that the models ran without major errors.
    2. Review results, calibrate models if necessary to observed data.
  5. Disseminate results and decisions as needed.
    1. Post forecast results back to the CWMS database.
    2. Generate inundation maps using RAS Mapper.