Well, there were periodic white outs even before we reached Thumb rock. But those didn't last long. But, we didn't confront real white out till we got to the very top of Rainier. Our Liberty cap photos came out pretty nice, but by the time we got to the top of Rainier the winds had picked up considerably and we had near complete white out. However, it wasn't so bad that we could not follow the foot prints down Emmons. So, all in all the weather could have been a lot worse, and we lucked out that it was a weak storm. If the weather had gotten bad around Thumb Rock which is still 4000 feet from the top, we would have had to go down LR, and across Carbon again. But, thankfully we had enough time to make it to the top and see the way down before it really hit.