Cold front may bring brief low-elevation snow to Portland metro from Monday night into Tuesday morning

Late-winter chill could briefly lower snow levels across the region

Portland and nearby communities could see a short-lived return of wintry weather early this week as a colder air mass pushes into northwest Oregon and southwest Washington. Forecasts indicate a window for low-elevation snow or a rain-and-snow mix from Monday night into Tuesday morning (March 9–10, 2026), with the highest odds concentrated overnight and around the morning commute.

Current projections put the probability of lowland snow in the greater Portland metro in the 20% to 40% range during that period. Even within the metro area, outcomes may vary sharply by elevation and neighborhood, with higher terrain more likely to see flakes or brief slushy accumulation than the central city.

What residents should expect and where impacts are most likely

The most plausible scenario for the city’s lowest elevations is intermittent wet snow mixing with rain, producing little to no accumulation on most surfaces. Any accumulation that does occur would be most likely on colder, less-traveled surfaces and at higher elevations, including hills and areas where temperatures dip closer to freezing overnight.

Forecast guidance also points to the possibility that temperatures could approach freezing during the overnight hours, which increases the risk of slick spots if precipitation rates briefly intensify or if heavier showers coincide with the coldest part of the night.

• Timing: Monday night into Tuesday morning, with the greatest concern for early Tuesday travel.

• Locations most susceptible: Higher neighborhoods, exposed hill routes, and north-facing slopes where temperatures can run colder.

• Primary hazards: Brief slushy patches, reduced visibility in heavier showers, and isolated slick roads if temperatures near freezing.

Transportation and day-to-day disruption risks

Even light snowfall in the Portland area can create outsized travel impacts because temperatures often hover near freezing and precipitation can shift rapidly between rain, wet snow, and mixed showers. The highest disruption risk is typically concentrated on bridges, overpasses, and elevated or untreated roadways. Commuters should be prepared for quickly changing conditions during the Tuesday morning drive.

Uncertainty remains as the event approaches

Forecasters emphasize that small changes in storm track, precipitation intensity, and overnight temperatures can determine whether Portland sees mostly rain, mixed showers, or a brief period of snow. Updates are expected as the cold front draws closer and higher-resolution observations refine the timing and snow-level projections.

A narrow overnight window is driving the snow potential: if colder air arrives sooner or precipitation peaks at the coldest hours, the likelihood of flakes and slushy impacts increases.

For most residents, the key takeaway is that any wintry weather is expected to be brief, but it could still affect early Tuesday travel—especially in higher elevations and on routes that cool quickly overnight.