City warns of black ice
Snow could fall and stick down to 600-foot level
City transportation officials have issued a weather warning for Friday night and Saturday morning.
According to the city, the National Weather Service has issued a winter weather advisory indicating a rain/snow mix starting Friday night in elevations as low as the valley floor. The advisory says light snow could stick in the West Hills above 600 feet.
"With temperatures forecasted to drop below freezing tonight and Saturday night, the traveling public is advised to be alert for wet snow and black ice citywide tonight, Saturday night and Sunday morning," the city said in a Friday afternoon release.
Landmark elevations above 600 feet on the west side include Washington Park, I-5 near Capitol Highway, Sunset Highway/Sylvan exit, Pittock Mansion, top of West Burnside, and Council Crest.
"Black ice is treacherous because it is hard to see. It forms when roads are wet and temperatures drop to freezing. Even though the roads look like they are just wet, they can be very slick. The traveling public is advised to be especially careful on bridges, overpasses, tunnels, and in shady spots. These areas freeze first and thaw last," the release said.
For more elevation information and plow routes, view the Portland Plow Map at www.portlandonline.com/transportation/plowmap