Tuesday, January 29th, 2008 — Wintery weather slowed the morning commute Monday in Oregon’s Willamette Valley. That followed an unexpectedly strong storm, which dumped at least a half-foot of snow in the Eugene area, the most it has seen in more than a decade. Traffic officials advised motorists not to drive if possible, saying that highways were coated with the thin, transparent, hard-to-see film of ice known as "black ice."