Here's one that will let you see what's coming. The link shows the previous 12 hour loop.

http://weather.unisys.com/satellite/sat_ir_enh_west_loop-12.html

As for the Seattle radar, it is based on Camano Island and we have to live with the Olympic gap. You can go to the Portland radar. It shows the south end of the Olympics pretty well and covers some of the Olympic gap from the Seattle radar.

http://radar.weather.gov/radar.php?rid=rtx&product=N0Z&overlay=11101111&loop=no

You can also look at the Victoria radar. It provides a little better coverage over the Olympic Peninsula. It might be situated a little higher in elevation than the Seattle radar, too.

http://www.weatheroffice.gc.ca/radar/index_e.html?id=XSI