Web cams in the area appear pretty clear. Click on the Mt. Williamson cam on the left. (Our Whitney webcam is not working currently.)
Here's from Lone Pine / Whitney Hostel:

Farther south on Owens Lake, looking west from the Keeler cams, it looks pretty smoky yet. Keeler is on the east side of Owens Lake (dry lakebed), and those cameras point west toward the Sierra. Here's the Owens Lake dustcam site:
http://www.gbuapcd.org/dustcam.htm