Yakima, Washington – A low but notable chance of light ice accumulation is expected across parts of central Washington tonight into Thursday morning, with the potential for slick travel conditions in some valleys and mountain-adjacent areas.
According to the National Weather Service in Pendleton, there is a 20 to 30 percent chance of light freezing rain developing overnight in the Yakima and Kittitas Valleys, including areas along the east slopes of the Washington Cascades. Portions of the Lower Columbia Basin have a lower probability, closer to 15 percent, of seeing light ice.
Any ice accumulation is expected to be minimal, generally around 0.01 inches, but even small amounts can create hazardous conditions on untreated roads, bridges, and overpasses. The greatest risk is during the overnight and early morning hours, when surface temperatures remain below freezing.
Travelers along Interstate 82, Interstate 90, U.S. Highway 97, and Interstate 84 should be alert for isolated slick spots, especially in shaded areas, on elevated surfaces, and near foothills. While widespread impacts are not anticipated, localized freezing rain could briefly reduce traction.
The NWS emphasized that this is a low-confidence, low-impact event, but one that still warrants caution due to the nature of ice. Conditions are expected to improve after Thursday morning as temperatures rise and precipitation tapers off.
This forecast is particularly relevant for early-morning commuters, commercial drivers, and school transportation routes across central Washington and adjacent areas of north-central Oregon.
Residents are encouraged to monitor updated forecasts overnight and allow extra travel time Thursday morning if freezing rain develops in their area.
