I am also curious about the trail conditions in mid-July. We have permits for July 13 and some of us have microspikes but some do not. I am hoping that the switchbacks will be mostly free of snow as we are not prepared to go up the chute.
SteveC and others have said that the switchbacks were open around July 12 during 2011 which was a very similar in snowfall. According to this chart this year is slightly below 2011 currently.
Hoping this means the switchbacks will be mostly snow-free by then, especially with this heat wave in the next week.
http://cdec.water.ca.gov/cdecapp/snowapp/swcchart.action