Mountain waves at KCOS/KFLY

A nice visualisation is something we all used to use before BLIPMAPS.
The old Java FSL sounding plots are now available as HTML, so if you're allergic to coffee you can still use them.

http://rucsoundings.noaa.gov/gwt/

Choose KCOS (or anywhere you want to fly), Latest, and a number of hours (12?) then Load.
As noted by Dan and others you're looking for wind increasing with altitude, not varying much in direction from perpendicular to the ridge. There will likely be a temperature inversion down low. Winds below that will be quite different, not really a factor in the wave but may mean easier ground handling.
Jim