it is an image from a web cam of mt hood. It has telemetry data from 6000' (TLINE) and 7000' (MMILE). It shows current temperature, min, average and max wind speeds for the last hour, relative humidity, and precip in water equiv. inches. It is updated hourly from a script on a webserver here which collects the info and sticks it in a database.
If you click on it, it will show you the current body count in Iraq.