Portland, Oregon — Conditions are aligning for potential snowfall in the Willamette Valley on Wednesday afternoon, a forecast that has brightened since earlier predictions suggested diminishing chances. The National Weather Service (NWS) in Portland has increased confidence in the possibility of several inches of snow, particularly impacting travel across the region.

Meteorologist David Bishop noted that there is a 45 to 60 percent likelihood of receiving one to two inches or more of snow along the I-5 corridor. This projection includes the Portland area and extends southeast to the Columbia River Gorge. The exact path of the low-pressure system, responsible for this snowfall, remains uncertain.

As of Tuesday afternoon, Bishop outlined that there is a 40 to 65 percent chance of measurable snowfall affecting areas along the I-5 highway from Wednesday into Thursday noon. The most probable regions to experience snow include the central coast, northern Willamette Valley, and the Portland and Vancouver metropolitan areas.

Despite this optimistic forecast, uncertainty persists regarding where the snowfall will settle. Bishop expressed concern over the variability in weather models, which are displaying inconsistent predictions about the trajectory of the weather system. Both scenarios— Track 1, which predicts snow to accumulate further north, and Track 3, which suggests southern snowfall—each carry a 20 percent chance of occurrence. The most likely outcome, Track 2, holds a 40 percent probability.

Bishop clarified that the remaining 20 percent accounts for the possibility of the weather system tracking anywhere from the Olympic Peninsula in Washington to northern California. This unpredictability raises concerns about conditions on Wednesday evening, particularly for commuters along the busy I-5 corridor.

Regardless of the snowfall’s intensity, meteorologists expect that any snow or ice accumulation will not linger. Forecasts indicate that temperatures in Portland will rise to 45 degrees on Thursday, which is likely to diminish any hazardous conditions created by winter weather.

Anticipation and caution are encouraged as residents prepare for the potential for winter travel disruptions, emphasizing the need for awareness of the changing weather conditions as the snow approaches.