East winds ahead of an approaching low pressure system brought temperatures down below freezing across the area ahead of the approaching precipitation. This lead to a mix of freezing rain, sleet, and snow across the area. While areas farther north saw more of a snow/sleet mix before a changeover to freezing rain then rain, areas in Lane County saw freezing rain for most of this event, causing power outages, damage to trees, and many car accidents around Eugene and Springfield.

Heavy Snow in CENTRAL WILLAMETTE VALLEY, OREGON
From 14-DEC-16 09:00:00 to 14-DEC-16 20:30:00 (PST-8)
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Official NWS Observations

In Salem there were reports of 3 to 5 inches of snow. There were also numerous reports of vehicles that got stuck and huge traffic jams from the snow.

Heavy Snow in GREATER  PORTLAND METRO AREA, OREGON
From 14-DEC-16 12:00:00 to 14-DEC-16 21:00:00 (PST-8)
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Official NWS Observations

There were reports of 2 to 4 inches in and around the Portland Metro area, which brought traffic to a halt. Over 500 vehicles were left abandoned on area roads once they turned icy. This storm essentially shut down the city for the next two days, since weather remained cold and snow could not melt. 1200 kids were stuck at schools in Beaverton until 8pm. Other school buses were still stuck with kids on them at 8:30 pm that night.

Heavy Snow in LOWER COLUMBIA, OREGON
From 14-DEC-16 14:00:00 to 15-DEC-16 01:00:00 (PST-8)
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Official NWS Observations

Generally 4 inches of snow was reported from Warren in the Lower Columbia up the I-5 corridor to Castle Rock.

Winter Storm in NORTH OREGON CASCADES FOOTHILLS, OREGON
From 14-DEC-16 09:00:00 to 15-DEC-16 00:00:00 (PST-8)
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

There was a report of 0.4 inch of ice accumulation near Sodaville.

Winter Storm in CENTRAL COAST RANGE OF W OREGON, OREGON
From 14-DEC-16 04:00:00 to 14-DEC-16 23:00:00 (PST-8)
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Snow followed by sleet and freezing rain.  There were reports of 0.25 to 0.5 inches of ice and sleet reported near this area, with power outages.

Winter Storm in CASCADE FOOTHILLS IN LANE COUNTY, OREGON
From 14-DEC-16 04:00:00 to 14-DEC-16 23:00:00 (PST-8)
Property damage: 10.00K
Crop damage: 0.00K
Reported by: Broadcast Media

Snow followed by freezing rain. There were reports of 0.5 to 1.0 inches of ice accumulation in the, with 0.88 inch of ice accumulation reported by local media just east of Springfield. Many power outages across the area.

Heavy Snow in UPPER HOOD RIVER VALLEY, OREGON
From 14-DEC-16 12:00:00 to 14-DEC-16 22:00:00 (PST-8)
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Official NWS Observations

Parkdale had 5 inches of snow.

Heavy Snow in CENTRAL COLUMBIA RIVER GORGE, OREGON
From 14-DEC-16 12:00:00 to 14-DEC-16 22:00:00 (PST-8)
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Official NWS Observations

Hood River reported 3 to 6 inches of snow.

Winter Storm in SOUTHERN WILLAMETTE VALLEY, OREGON
From 14-DEC-16 04:00:00 to 14-DEC-16 23:00:00 (PST-8)
Property damage: 15.00K
Crop damage: 0.00K
Reported by: Broadcast Media

Snow, followed by freezing rain.  The freezing rain turned into a major ice storm occurred in Eugene and the vicinity with 0.5 to 1.0 inch of ice accumulation observed. There was significant damage to trees and power lines, and fairly widespread power outages across the region. 15,000 people were without power.

Heavy Snow in NORTH OREGON CASCADES, OREGON
From 14-DEC-16 09:00:00 to 15-DEC-16 00:00:00 (PST-8)
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Official NWS Observations

The Marion Forks SNOTEL reported 15 inches of snow, and the Smith Ridge SNOTEL reported 13 inches of snow. An avalanche caused by heavy snow also closed US 20 across Santiam Pass.

Heavy Snow in CASCADES IN LANE COUNTY, OREGON
From 14-DEC-16 03:00:00 to 15-DEC-16 00:00:00 (PST-8)
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Official NWS Observations

The Cascade Summit SNOTEL reported 14 inches of snow and the McKenzie SNOTEL reported 11 inches of snow with this storm.

Heavy Snow in WESTERN COLUMBIA RIVER GORGE, OREGON
From 14-DEC-16 12:00:00 to 15-DEC-16 00:00:00 (PST-8)
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Official NWS Observations

There was a report of 6 inches of snow at Beacon Rock.