Here is a link for a 7-day forecast for 12,800' in the Whitney Zone... basically what you can expect at Trail Camp. (Ignore the top line, which has current conditions for Bishop, and scroll down to where the 7-day forecast is.)

http://forecast.weather.gov/MapClick.php...Field2=-118.275

You can use the little map to adjust the forecast area.

Also, this link will give you current and historical information for Cottonwood Lakes, 10K elevation, which is near Whitney.

http://www.wunderground.com/weatherstation/WXDailyHistory.asp?ID=MCWDC1