Timestep can be changed using the upper right horizontal slider. Layer transparency can be adjusted with the vertical slider.
Temperature map shows the level of the -2.5°C isoline. If it is not present all the region may be above (or below) the level for recommended snow production.
Map at 825 hPa corresponds to a height between 1700 and 1900 m above sea level, depending on pressure and temperature. This level shows the wind speed in the free atmosphere and it is representative of winds at the top of this resort.