Donner Summit (California, USA) Major snowstorm at Donner Summit: heavy snow, whiteout conditions, and dozens of cars spinning out and crashing. Donner Summit (California, USA) Semi-truck crashed and stranded on I-80 eastbound as heavy snow continues. With the highway closed, this driver may have to spend the night on Donner Summit. Donner Summit (California, USA) Day 2 midday update at Donner Summit as major snowstorm roars on. Extreme blizzard conditions continue with I-80 fully closed. Cars are buried, my chasing buddy Michael helped pull a stuck driver from a snowbank, semis are stranded, visibility near zero, and at least 1 foot of snow has fallen since 6 am.