With a cold air mass in place over the Pacific Northwest, two strong and very moist Pacific weather systems brought snow to the area with heavy snow in the mountains and snow levels down to the valley floor.

Heavy Snow in UPPER HOOD RIVER VALLEY, OREGON
From 17-JAN-12 00:00:00 to 18-JAN-12 09:00:00 (PST-8)
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

A trained spotter in Parkdale measured 23 inches of new snow...with 13 of those inches falling in just 9 hours.

Heavy Snow in WESTERN COLUMBIA RIVER GORGE, OREGON
From 17-JAN-12 19:50:00 to 18-JAN-12 08:32:00 (PST-8)
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

A trained spotter in Husum measured 13.5 inches of new snow. Heavy snowfall was also measured by a trained spotter in Stevenson with 9 inches of new snow. A NWS employee in Stevenson measured 8 inches of new snow and another NWS employee in Stevenson measured 6 inches of new snow. Trained spotters measured 8 inches of new snow in Hood river, and 7.5 inches of new snow in Carson.

Heavy Snow in LOWER COLUMBIA, OREGON
From 17-JAN-12 21:00:00 to 18-JAN-12 07:00:00 (PST-8)
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Broadcast Media

Broadcast media reported 12 inches of new snow being measured in Ranier. Heavy snowfall was also measured in Scappoose with 10 inches of new snow and in St. Helens with 8 inches of new snow.

Heavy Snow in COAST RANGE OF NW OREGON, OREGON
From 17-JAN-12 12:00:00 to 18-JAN-12 05:00:00 (PST-8)
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Official NWS Observations

Sunset Summit measured 24 inches of new snow. Heavy snowfall was also measured at Saddle Mountain with 23 inches of new snow, at the Wilson River Summit with 22 inches of new snow and at Seine Creek with 13 inches of new snow.

Heavy Snow in GREATER  PORTLAND METRO AREA, OREGON
From 17-JAN-12 21:00:00 to 18-JAN-12 05:00:00 (PST-8)
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

A trained spotter in Forest Grove measured 11 inches of new snow. Heavy snowfall was also measured in other areas of Forest Grove and Happy Valley with 4 inches of new snow. 2.3 inches of new snow was measured at the NWS Forecast Office in Portland. 30,000 customers were without power in the Portland area due to downed trees from snow and wind. The Fremont Bridge in Portland was closed due to 30+ accidents caused by heavy snow.

Heavy Snow in NORTH OREGON CASCADES FOOTHILLS, OREGON
From 17-JAN-12 01:00:00 to 18-JAN-12 06:00:00 (PST-8)
Property damage: 0.00K
Crop damage: 0.00K
Reported by: SNOTEL

The South Fork Bull Run SNOTEL site measured 25 inches of new snow.

Heavy Snow in NORTH OREGON CASCADES, OREGON
From 17-JAN-12 01:00:00 to 18-JAN-12 07:00:00 (PST-8)
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Official NWS Observations

Mt. Hood Meadows measured 50 - 55 inches of new snow. Heavy snowfall was also measured at Timberline with 45 to 55 inches of new snow, at the Mt. Hood Test SNOTEL site with 35 - 40 inches of new snow and at the Blazed Alder SNOTEL with 35 inches of new snow.  Thirty to thirty-five inches of new snow was measured at the Mud Ridge SNOTEL, the Greenpoint SNOTEL and at the Little Meadows SNOTEL sites. Government Camp ODOT measured 34 inches of new snow, the North Fork SNOTEL site measured 31 inches of new snow, and the Hogg Pass SNOTEL site measured 24 inches of new snow. 25 - 30 inches of new snow was measured at both Mt. Hood Ski Bowl and at the Santiam Jct ODOT, 30 inches of new snow was measured at both the Clackamas Lake SNOTEL and the Daly Lake SNOTEL, and 20 - 25 inches of new snow was measured at both the Red Hill SNOTEL and the Jump Off Joe SNOTEL sites.