Rain, snow, fog, and smoke can all cause total blindness on the highway regardless of the time of day. The Associated Press reports that three people were killed in a series of Interstate 80 car accidents apparently caused by snowy whiteout conditions.
The accidents occurred on Saturday afternoon, close to what would be the brightest time of day on a clear afternoon — 2:00 p.m. However, on this weekend, a snow storm hit Western Pennsylvania and a ten-mile stretch near Venango County making roadway visibility almost zero.

