Just to put my experience in perspective first, I hiked the A.T march 2nd to july31st 2010, PCT May 1st to Sept 21st 2011
I can do 30 MPD in 12 to 13 hours depending on conditions.
I have other things to do in 2012 making my thru-window much shorter then in the past for me.
I am thinking of starting July 15 SOBO on the CDT.
I hiked 500 miles of solid snow and another 100 patchy of snow on the PCT. This was all done map and compass or GPS so a few hundred of snow pack is not a big deal.
Storms would be an issue.
What are the potential weather issues with this time frame?
PINE.