Although only 2161 metres (approx 7000') high, these coastal mountains are extremely dangerous because of very variable weather conditions, high snowfall and high winds. A couple of interesting papers on the area and the climate are

http://geopubs.wr.usgs.gov/prof-paper/pp1678/AK2001_Chpt14_alt.pdf

and

http://www.nps.gov/archive/katm/hrs/hrs5.htm