If you dive into my Dropbox Weather Briefing folders, you will see one with ModelSoundings. These are bufkit soundings using the RAOB.com program to make time height cross sections of thermal heights (Thermal index TI=0 is the white band), surface temp, Surface wind and Lifted Condensation Level (LCL) or cu cloud base.

KMHV is Mojave, CA the closest site to Tehachapi although much lower
KNID is China Lake, not too far away from Inyokern
TBM is a virtual point in the high Sierra between Mt Whitney and Bishop
BDG is Bridgeport, a high mountain valley location between Bishop and Minden

Most of the model soundings are not representative of the best soaring on ridge tops, except for BDG, KTVL (Tahoe) and KTRK Truckee

Walt Rogers WX