Having selected a storm and time offset, there are a number of variables which can be plotted. Most of the variables are stored on a number of pressure surfaces from 925 hPa at the ground up to 200 hPa. However, the winds can be plotted on Θ surfaces (surfaces of constant potential temperature), and the surface pressure and cloud cover are all only at one pressure surface.

The variables can be selected from the list below or from the buttons on the left hand side: