2020 Willamette Valley / Oregon Vintage

The 2020 season began with a mild, dry winter that carried ongoing western United States drought concerns into spring. Spring itself was relatively cool across Oregon, with some frost reported but not severe in most regions. Heat then swung the other way: the spring saw wide swings between early-season warmth and a cool, wet stretch leading into and through bloom. That instability at flowering was the defining viticultural event of the year. Growers across the Willamette Valley reported high amounts of shatter and small berries and clusters. David Beck at Crawford-Beck Vineyard in the Eola-Amity Hills called it the worst possible weather during bloom. Ted Casteel at Bethel Heights described small berries and heavy hens and chicks, with yield down roughly 50 percent at his site, and likened the outcome to historically short vintages. Bruno Corneaux at Domaine Divio on Ribbon Ridge reported fruit set down 30 percent. Summer heat stress was moderate and the season was shaping up as weather-wise decent through early September. Ripening ran close to average in northern Oregon, and growers reported generally low disease pressure and relatively low pest pressure, with bird pressure greatest at higher elevations and on late-picked varieties. Across the state, April to October temperatures in the western United States were the third warmest in a 126-year record, 2.6 degrees F above the long-term average, and Oregon recorded its fourth warmest growing-season temperatures on record, ranging from 0.2 degrees F above average at Milton-Freewater to 1.9 degrees F above at McMinnville. Growing degree days at McMinnville finished the April to October period 3 percent above the 15-year average and 6 percent above 2019. The statewide picking window ran roughly September 10 through October 15 depending on variety and region, which meant most Willamette Valley red fruit was still on the vine when the smoke arrived. Yields were short before the fires and shorter after: statewide, tons harvested fell 29 percent and tons crushed fell 23.1 percent, and Willamette Valley growers reported yields down 10 to 50 percent on most varieties, especially Pinot Noir.

• Mild, dry winter with continuing drought concerns; spring relatively cool with limited frost impact
• Wide swings into a cool, wet bloom caused heavy shatter and small, uneven clusters across the valley
• Moderate summer heat stress and low disease and pest pressure; ripening close to average in northern Oregon
• McMinnville growing degree days finished 3 percent above the 15-year average and 6 percent above 2019
• Statewide picking window ran roughly September 10 through October 15, after the September 7 wind and fire event
• Yields down 10 to 50 percent on most varieties in the Willamette Valley; statewide harvested tonnage down 29 percent

The Beachie Creek and Lionshead fires were ignited by lightning around August 16 and smoldered for weeks. What changed on September 7 was the weather. A very large high-pressure area stretching from the desert Southwest to Alaska pushed the jet stream into northern Canada and forced an extreme east wind event. Winds of 30 to 60 miles per hour moved over the mountains, warming and drying the air as they descended. Dew points dropped as much as 30 degrees F in an hour and relative humidity fell to 8 to 15 percent, desert-like readings that reached even the coast. Woody fuels west of the Cascades burned quickly, the smoldering August fires exploded, and new fires started from downed trees and power lines. The Oregon Wine Board described it as an extremely rare event with only a handful of comparable events on record. Beachie Creek and Lionshead merged on September 8 into a roughly 200,000-acre fire across the Santiam and Breitenbush regions, spanning Clackamas, Linn and Marion counties. Lionshead also sparked the Holiday Farm Fire of about 175,000 acres in the McKenzie River valley. Further south, the Almeda Drive and South Obenchain fires added smoke over the Rogue and Umpqua valleys. Statewide the 2020 fire season burned more than one million acres, destroyed several thousand homes and killed 11 people.

• Beachie Creek and Lionshead were lightning-ignited around August 16 and smoldered until the September 7 wind event
• Winds of 30 to 60 miles per hour, dew points down as much as 30 degrees F in an hour, relative humidity of 8 to 15 percent
• The two fires merged on September 8 into a roughly 200,000-acre complex across Clackamas, Linn and Marion counties
• Statewide the season burned more than one million acres and killed 11 people

Smoke from the fires blanketed wine areas throughout the North Willamette Valley for more than ten days, and specifically lingered around the Eola-Amity Hills west of Salem from roughly September 7 to 18. One vineyard operator described conditions as dusk for ten days, with temperatures dropping 20 degrees F. A South Willamette Valley grower reported as much as a quarter inch of ash accumulating on vineyard surfaces by the time the smoke began clearing in mid-September. Oregon Department of Environmental Quality and Lane Regional Air Protection Agency data showed record-breaking air quality readings during the week of September 7 to 15, the worst ever recorded in Portland, Eugene, Bend, Medford and Klamath Falls. Portland's air quality index peaked at 486 on September 13 and logged three Very Unhealthy and five Hazardous days in that stretch, having never before recorded air quality above Unhealthy. Exposure was not uniform. Growers reported that the smoky east side of the Eola-Amity Hills showed dramatically different conditions from mostly clear skies on the west side of the same AVA, so siting relative to the smoke plume mattered more than AVA boundaries. The scale of impact was still broad: 75 percent of North Willamette Valley vineyards, 609 of 808, reported fire or smoke impact, against 82 percent in the South Willamette Valley, 44 percent in the Umpqua Valley, 29 percent in the Rogue Valley and 20 percent along the Columbia River.

• Smoke sat over the North Willamette Valley for more than 10 days, and over the Eola-Amity Hills roughly September 7 to 18
• Portland's air quality index peaked at 486 on September 13, a record for the area
• The east side of the Eola-Amity Hills was smoky while the west side of the same AVA stayed mostly clear
• 609 of 808 North Willamette Valley vineyards (75 percent) reported fire or smoke impact, the highest share of any Oregon producing area

Smoke compounds concentrate in grape skins, so the clearest lever available to winemakers was to limit skin contact. The industry-wide response was a pivot toward white wines, including white Pinot Noir, Chardonnay, sparkling, Sauvignon Blanc, Chenin Blanc, Gewurztraminer and Riesling, along with roses made with light pressing. Oregon producers drew on smoke-mitigation experience shared by colleagues in Napa Valley and by Australian, New Zealand, California and Washington producers who had worked through fire-adjacent vintages going back to the 1980s. Twelve percent of survey respondents reported testing smoke-mitigation methods, including handpicking and washing fruit to reduce ash entering fermentation, lighter pressing, and chemical mitigation of smoke-associated phenols. Outcomes varied by producer. Statewide, of wineries reporting wildfire impact, the most commonly cited outcome was near-complete loss of the 2020 red wine vintage or severe downgrading of quality and label tier. Eighteen percent of wineries statewide reported detecting the taste of ash in the vintage. About 6.5 percent of buyers rejected or renegotiated grape-purchase contracts at reduced prices, and cancelled contracts were reported by 3.6 percent of vineyard respondents and 6.8 percent of winery respondents. A Decanter retrospective reported that many Willamette Valley wineries sold off wine in bulk, declassified wines, made white Pinot Noirs, and in the worst cases made no wine at all. Adam Campbell of Elk Cove Vineyards estimated that total Willamette Valley wine production was probably cut in half across the valley.

• Producers pivoted toward whites, white Pinot Noir, sparkling and lightly pressed rose, styles with less skin contact
• 12 percent of survey respondents tested mitigation methods including handpicking, washing fruit and lighter pressing
• 18 percent of Oregon wineries reported detecting the taste of ash in the 2020 vintage
• Elk Cove's Adam Campbell estimated Willamette Valley production was roughly cut in half

Read on fruit quality alone, 2020 was a strong year. Smaller clusters and berries were widely credited with giving great color, concentrated flavors, desired sugar levels and good acidity. Doug Tunnell of Brick House Vineyards on Ribbon Ridge called the fruit outstanding and said that without the smoke this would have been a truly memorable vintage, yielding small volumes of highly concentrated wines with superior depth and balanced acidity. David Beck said that without smoke effects this could have been a spectacular vintage. Ted Casteel noted that short, small-berry vintages generally lead to high quality wines and that the wines tasted and smelled great coming out of the fermenter. The Oregon Wine Board report, compiled by Gregory V. Jones of Linfield University's Evenstad Center for Wine Education and published January 8, 2021, said it was too early to predict the overall impact that smoke and wildfires would have on the vintage, while expressing confidence that there were beautiful wines that would earn the region's reputation. Outcomes were site-specific and timing-specific rather than uniform, so producer and bottling selection carries more weight in 2020 than in an ordinary year. The event also produced litigation: in October 2025, PacifiCorp reached a $125 million settlement with 93 Willamette Valley wineries and vineyards, including Willamette Valley Vineyards, Sokol Blosser and King Estate, over claims tied to the September 7, 2020 windstorm.

• Small berries and clusters gave color, concentration, good sugar levels and good acidity before smoke exposure
• Brick House's Doug Tunnell called the fruit outstanding and said that without smoke this would have been a truly memorable vintage
• Smoke outcomes were site- and timing-specific, so bottling-level selection matters more than usual in 2020
• PacifiCorp settled with 93 Willamette Valley wineries and vineyards for $125 million in October 2025