Now you are ready to compute a CWMS forecast. The Modeling module displays the time information associated with an active forecast, and a list of forecast runs associated with that active forecast. For the active forecast, you can compute for a single forecast run or for compute multiple forecast runs . There are several ways to compute a CWMS forecast and the following sections describe in detail how you would execute a single forecast run or execute multiple forecast runs.

You can also change the behavior of a forecast run compute, by telling the compute to skip a model alternative (CWMS Forecast Run Details), or tell the compute to execute through a specific model alternative (CWMS Forecast Run Details).

Computing a Single Forecast Run

When a forecast run is highlighted, from the CWMS CAVI main window, click the Modeling tab, from the Forecast Tabs, click Actions (Figure 1). Click Compute (Figure 1), the Compute Progress dialog will open (Figure 2) and the highlighted forecast run will be computed.

Figure 1 Forecast Tab - Actions

Another option for computing a single forecast run is, from the Forecast Run Details Area of the Modeling module, right-click on a forecast run, from the shortcut menu, click Compute. The Compute Progress dialog will open (Figure 2) and the highlighted forecast run will be computed.

Figure 2 Compute Progress Dialog

An additional way to compute an individual forecast is, from the CWMS CAVI main window, click the Modeling tab, from the Forecast menu, click Compute Manager. The Compute Manager dialog (Figure 3) will open, select the forecast run your wish to compute, click Compute. The Compute Progress dialog will open (Figure 2) and the highlighted forecast run will be computed.

Figure 3 Compute Manager Dialog

Computing Multiple Forecast Runs

CWMS provides you a way to execute more than one forecast run at one time, from the CWMS CAVI main window, click the Modeling tab, from the Forecast menu, click Compute Manager. The Compute Manager dialog (Figure 3) will open, select all of the forecast runs you wish to compute, click Compute.

The Compute Progress dialog will open (Figure 2) and the highlighted forecast run will be computed.

Recompute Forecast Runs

When a forecast run is executed, CWMS remembers what CWMS models executed for that forecast run. If changes were made to a model in the forecast sequence, CWMS will re-compute the model when you compute the sequence. If no changes were made to a model and the model was previously computed, CWMS will not recompute the model in the sequence. If for some reason you need to recompute the entire model sequence for a forecast run, from the Modeling Module, from the Actions tab (Figure 1), click the Force Recompute check box. This will "force" a full recompute of the selected forecast run when you click Compute (Figure 1). The Compute Progress dialog (Figure 2) will open and all the models will be run.