I am looking at planning a mid October Whitney Summit 10/15, 10/16, 10/17. I was hoping I could get some feedback on what to expect and what to be prepared for.

Making it on 10/15 is not an absolute for me, so if conditions are not optimal I am comfortable to defer to a later date (likely 2012).

I was planning a 7 day JMT Sept earlier in the year, but some life curveballs were thrown my way so I am re-planning for next summer. But I would still like to make it up once this year. I am just not familiar with the Sierra's in October and know they can be quite variable. So in short, what should I look out for...

Regards,
Marc