Operational Forecast System (OFS)
OFS is a continuous river forecasting system which provides the forecaster with predictions of river flow to use in producing flood forecasts and other hydrologic products.
- The system stores observed and future point data
e.g., precipitation, temperature, stage
- performs various preprocessor functions on the observed data
e.g., mean areal precipitation, mean areal temperature, stage to discharge conversion
- produces forecast products
e.g., plots of predicted, simulated and observed river stage at selected points

Parameter values are normally determined using the Calibration System and transferred to the Operational Forecast System through a manual preparation step.
This manual preparation is needed to add the description of operations for a given forecast (e.g., blend routines, different plot options)