Model Guidance Parameters Page

After choosing the Model and Area from the Model Guidance page, the Model Guidance Parameter Page is displayed. The figure below shows the Model Guidance Parameter Page for the model, GFS, and the area, NAMER.

Shown on the Model Guidance Parameter Page are:

Click on one of the parameters to display the available forecast hours for that parameter. The next figure shows the Model Guidance Parameter page after precip_p01 has been selected. (Note that the term product refers to the same thing as parameter.)

The Model Guidance Parameter page adds the following additional information, once a parameter has been selected:

Forecast hour and pre-defined looping links

The table of forecast hours, and the pre-defined loops are shown as clickable links, or static text that is black or gray:

Clicking on a pre-defined loop link will start the loop running. "Loop All" will loop all available images. "1 Day" will loop images from the first available forecast hour through one day. "2 Day" will loop from the first available forecast hour through the second day, etc.

Clicking on a forecast hour link will either display the image for that hour, or select it for user-selected looping, depending on the Time Select mode, which is described in the next section.

Some of the models are run more than once an hour, and the forecasts are presented as forecast hour : forecast minutes (hhh:mm). Figure 3-3 shows the forecast hours table for the HRRR model that produces 4 images per hour for some products. For the selected product in the figure, only one per hour is generated. The figure shows that forecast hours 001:00 through 008:00 are ready, while 009:00 through 015:00 are not yet completed. All of the 15, 30, and 45 minute forecast minutes are not valid.

Time Select Modes

The two TIME SELECT modes are used to specify how to view forecast hour images:

Since this is new feature, there is a (?) link next to 'TIME SELECT''. Click on the (?), and information on using the two modes is displayed. To close the help text, click (?) again, or click the Close button inside the help text.

Single Time Selection Mode

The figure below shows the Model Guidance Parameter Page with Cycles, Parameters, Time Select, Forecast Hour links, and pre-defined loops links, with the Time Select row circled. 'Single Time Selection' is displayed in red, indicating that the current Time Select mode is Single Time Selection. While in this mode, clicking on a forecast hour link displays the static image for that forecast hour. The Single Image Graphic page is ......

Time Range Selection Mode

When in Time Range Selection mode, clicking on the forecast hours sets the start and end hours, which will be used for looping.

To set the Time Select mode to Time Range Selection, click the text 'Time Range Selection'. The text will turn red, and two additional buttons will appear: Clear and Time Range Loop (____ - ____) as shown in the figure below.

To set the start hour, click on a forecast hour, for example, 016. The 016 link turns red, and the
Time Range Loop (____ - ____) button changes to Time Range Loop (F016 - ____) . This indicates a starting hour has been selected.

Then select another forecast hour, for example, 058. The link 058 turns red, as well as all of the links between 016 and 058. The button changes to Time Range Loop (F016 - F058) (See the figure below). Clicking the Time Range Loop button will initiate an image looping page that starts at forecast hour 016 and ends with forecast hour 058.

The starting and ending forecast hour settings may be changed by simply clicking another forecast hour. For the previous e xample, clicking a number less than 016 will reset the starting hour, and clicking a number greater than 058 will reset the ending hour. Clicking in between 016 and 058 will reset either the starting or ending hour, whichever is closer. Also, one can start over by clicking the 'Clear' button, which will deselect all forecast hours.

While in Time Range Selection mode, the user can change to another product, and the software will keep the same loop range selections, if possible, i.e., if the new product has the same forecast hours available.

Note: the pre-defined loops ('Loop All', '1 Day', etc) work the same in either Time Select mode.