Floods of 1996 and 1997
Floods in Yosemite Valley aren't uncommon during spring runoff, when the Merced River swells with melted snow and overflows into meadows. The largest, least common floods occur during winter--most recently in January 1997. See what Yosemite Valley looked like during the floods of May 1996 and January 1997. (6 minutes)
You can also download a Quicktime version of this movie: [24 MB].