San Jose State has some nice color schemes with their model graphics, though the model is low resolution (36km I think).

Marine pushes

Marine pushes are generally associated with a change to southwest winds. Look for increased dewpoints and possibly lowered temperatures as a result.

WA 12 Hr surface obs

Also look at the depth of the marine layer. This might help determine how long a low level cloud deck will take to burn off, or even whether it will.

Quillayute Soundings?

Sand Point Profiler?

Clouds?

Aside from the satellite images (links above), look at the upper level relative humidities (at Texas A&M?) and use 70% as a rule of thumb for possible clouds. Fill in... ksea, 24 hr., 9:ETA grid

Marine pushes

Clouds?

Other useful links