To begin, choose the method you want to use to access the information. Depending on the capabilities of your computer, you can use an interactive Java applet or conventional HTML forms. Either method gives you access to the same information.

Once you have chosen your access tool, you need to select the report you want. The site offers a large number of different views of the model and underlying data; choose the report that best fits your needs.

For each report, the site (or the applet) will request a series of parameters, such as location, time period, and types of data to retrieve. Once you have specified these parameters, you can retrieve your report.