This was a major, widespread, multi-faceted winter storm that caused major problems across the northern 2/3 of our forecast area, even (and especially) in the lowlands.  Impacts were felt as far south as Albany.  WFO Portland measured 10.1 of snow, followed by roughly 0.75 of ice.  Significant impacts to infrastructure occurred, with over 400,000 people losing power at some point during the storm.  The area impacted the hardest appears to be the southern portions of the Portland metro, south through Oregon City and Silverton and as far south as Salem and Aumsville.  Polk County was hit hard by ice as well, with 1.00 to 1.75 of ice reported.  Some people in these areas hard-hit by ice lost power for over a week.

Ice Storm in GREATER  PORTLAND METRO AREA, OREGON
From 14-FEB-21 16:00:00 to 15-FEB-21 00:03:00 (PST-8)
Property damage: 5.00M
Crop damage: 0.00K
Reported by: Public

While much of the Portland metro area was already reeling from the snow and ice event Feb 11-13, another slug of freezing rain came on the 14th and early 15th, this time mainly impacting downtown and eastern portions of the metro while most western areas changed over to plain rain.  East metro locations received generally 0.50-1.00 of ice from this second event, with amounts tapering off quickly to the south and west of Portland.  This added to the problems with power outages due to snow and ice, with estimates of 200-300k people without power in the metro area.  The ice also disrupted mass transit, shutting down the MAX system due to ice on the wires.

Winter Storm in NORTH OREGON CASCADES, OREGON
From 11-FEB-21 16:00:00 to 13-FEB-21 11:00:00 (PST-8)
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Public

Wide variety of impacts due to snow and ice, ranging from a crippling snow event at all elevations in the northern half and elevated portions south of Santiam Canyon, a crippling snow to ice event in the Santiam Canyon.  There were several reports of 2 feet of snow within the zone.  Greatest overall total we could find was 27 inches at Mt Hood Meadows.

Winter Storm in WESTERN COLUMBIA RIVER GORGE, OREGON
From 12-FEB-21 09:00:00 to 15-FEB-21 05:00:00 (PST-8)
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Public

Snow and wind continued after the Blizzard Warning was converted to a Winter Storm Warning.  Storm total snowfall was around 24 inches at Cascade Locks by midday the 13th, and more arrived with the next impulse the 14th/15th.

Blizzard in WESTERN COLUMBIA RIVER GORGE, OREGON
From 11-FEB-21 10:00:00 to 12-FEB-21 09:00:00 (PST-8)
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Broadcast Media

Strong winds and heavy snow shut down I-84 east of Troutdale.  This was a transition event, from blizzard to winter storm to freezing rain.  Mark Nelsen (KPTV Chief Met) reported 15 inches of snow total, followed by 0.75 of ice.  Sustained winds of 30-45 mph with gusts 60-80 mph were reported for 12-24 hours (or more), along with heavy snow reducing visibility to near zero during the height of the wind/snow portion of the event.  I-84 finally reopened the morning of the 14th as snow decreased and changed to a brief period of freezing rain.

Winter Storm in UPPER HOOD RIVER VALLEY, OREGON
From 11-FEB-21 07:00:00 to 15-FEB-21 05:00:00 (PST-8)
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

A trained spotter measured 14 inches of snow in Hood River.  Certainly enough to verify a warning in the upper Hood River Valley, too.

Ice Storm in CENTRAL WILLAMETTE VALLEY, OREGON
From 11-FEB-21 14:00:00 to 13-FEB-21 09:00:00 (PST-8)
Property damage: 10.00M
Crop damage: 0.00K
Reported by: Public

This was mostly an ice event for the Central Willamette Valley as a major ice storm occurred from freezing rain.  By the end of the event, there were many reports of over 1 inch of ice accumulation, with as much as 1.75 inch reported in Sheridan.  This was a crippling ice storm for the Salem metro area where generally amounts of 0.5 to 1.25 inches of ice were reported, and many were without power for days. Key impacts: widespread tree damage and power outages, including 110,000 customers without power in Salem. Multiple road closures as well including Highway 99.

Winter Storm in CENTRAL COLUMBIA RIVER GORGE, OREGON
From 11-FEB-21 07:00:00 to 15-FEB-21 05:00:00 (PST-8)
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Hood River area observed 10-16 inches of snow. A trained spotter near Hood River reported 14 inches of snow. I-84 was closed for a time.

Winter Storm in LOWER COLUMBIA, OREGON
From 11-FEB-21 13:00:00 to 13-FEB-21 11:00:00 (PST-8)
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Public

Snow totals ranged from around 6 inches near Prescott to 12 inches near Columbia City and St Helens.

Winter Storm in COAST RANGE OF NW OREGON, OREGON
From 11-FEB-21 12:00:00 to 13-FEB-21 11:00:00 (PST-8)
Property damage: 100.00K
Crop damage: 0.00K
Reported by: Public

Impacts ranged from mostly snow in the northern portion of the zone to mostly ice further south near Grand Ronde, Willamina, and the Van Duzer Corridor.  North of Highway 6, general 6 to 12 inch snow totals occurred.  South of Highway 6, precipitation was mostly in the form of freezing rain, yielding up to an inch of ice near Grand Ronde and Highway 18.  Many trees and power lines were downed by the combination of snow and ice, and many roads were closed during the event.

Ice Storm in NORTHERN OREGON COAST, OREGON
From 12-FEB-21 07:00:00 to 13-FEB-21 10:00:00 (PST-8)
Property damage: 100.00K
Crop damage: 0.00K
Reported by: Public

Wide variation of snow and ice accumulations, with impacts mainly felt near the Columbia River.  Cathlamet reported 12 inches of snow, while Astoria and Long Beach reported very little snow.  US Hwy 101 was closed at the Megler Bridge due to slippery road conditions and falling chunks of ice from the bridge structure.  Estimated ice near Astoria ranged from 0.33 to 0.66.  Similar snow and ice amounts can be assumed along both sides of the Columbia River.

Winter Storm in GREATER  PORTLAND METRO AREA, OREGON
From 11-FEB-21 12:00:00 to 13-FEB-21 11:00:00 (PST-8)
Property damage: 10.00M
Crop damage: 0.00K
Reported by: Public

This was a transition event for the greater Portland metro area, with wide variation in snow and ice totals across the zone.  Snowfall totals tended to be highest near the Columbia River, while the south and west metro saw much less.  General 1-4 inch snow totals in the south and west metro, but up to 10-14 inches near the Columbia, all the way down-river to Scappoose.  There was a prolonged period of freezing rain in southern portions of the metro area, resulting in massive power outages which persisted for several days in many cases.  Ice accumulations ranged from 0.25-0.50 in downtown Portland, with amounts generally increasing closer to 1 inch in the south and southeast metro.  The heaviest ice accumulations appear to have been around Oregon City, West Linn, Wilsonville, and Sherwood, where up to 1.25 inch of ice was reported.  Another slug of freezing rain came on the 14th and early 15th, this time mainly impacting downtown and eastern portions of the metro while most western areas changed over to plain rain.  This latter event was handled with a separate Ice Storm Warning.
In the Portland area over 250,000 customers across the metro area were without power due to ice, snow and winds. Key impacts included collapsed roofs and awnings, widespread tree damage, power outages, vehicle accidents, and road closures including I-84 east of Troutdale.

Ice Storm in CENTRAL COAST RANGE OF W OREGON, OREGON
From 12-FEB-21 10:00:00 to 13-FEB-21 06:00:00 (PST-8)
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Mainly for the Van Duzer (Hwy 18) corridor near Grand Ronde.  Highway 18 was closed for 24-48 hours, and ODOT pictures revealed 1.00 of ice.  A trained spotter in Blodgett (further south) also reported 0.75 of ice before it started melting the morning of the 13th.

Winter Storm in NORTH OREGON CASCADES FOOTHILLS, OREGON
From 11-FEB-21 16:00:00 to 13-FEB-21 11:00:00 (PST-8)
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Wide variety of impacts due to snow and ice, ranging from a crippling snow/ice event in the northern half, a crippling ice event in the Santiam Canyon, to minimal impacts in mostly plain rain for the extreme southern portion of the zone.  There were reports of over 2 feet of snow just east of the zone boundary, even at elevations below 2500'.  For example, a trained spotter in Detroit measured 26 inches overall, and there was a public report from Zigzag of 25 inches.