In HEC-RTS, a forecast refers to a model simulation conducted over a specific time window, using a distinct set of boundary conditions. Forecasts are managed and modified within the Modeling module.

Typical Forecasting Workflow

Step 1: Review Incoming Data

  1. Begin in the Acquisition module to check the availability and quality of your data.
  2. Validate the data and fill in any missing values.
  3. Ensure all critical datasets are present for the selected time window.

Step 2: Analyze Current Watershed Status

  1. Use the Visualization module to assess current watershed conditions.
  2. Plot observed data such as reservoir levels and downstream flows.
  3. Download and animate gridded datasets from your local database or Cumulus (for USACE modelers) (e.g., observed and forecasted precipitation).

Step 3: Create a New Forecast

  1. Navigate to the Modeling module to create a new forecast.
  2. Define the forecast time window.
  3. Select the forecast alternative(s) to be executed.
  4. Verify that all required data have been properly extracted.

Step 4: Execute the Forecast

  1. Run the forecast in the Modeling module.
  2. Ensure the models run without significant errors.

Step 5: Analyze and Disseminate Results

  1. Review the forecast results.
  2. If needed, calibrate the models using observed data.
  3. Share results and inform decision-making.
  4. Post the final forecast results.
  5. Generate inundation maps using RAS Mapper.

Additional Resources

Refer to the Mastering Forecasts guide for additional step-by-step instructions on creating and computing a forecast within HEC-RTS.