Snow will fall down the valley floor in Portland and surrounding areas as early as Wednesday.
The National Weather Service claims that the unseasonably cold air mass isn't quite done with us yet. Weather spotters reported snow overnight in southwest Washington and northwest Oregon, including near Aumsville, in Clark County, and near the Coast Range. Crews from the Washington County Roads Department reported snowfall at higher elevations via Twitter, but said roads were clear as of 6 a.m. Much of the night, snow levels have fluctuated, suggesting that heavier showers will reduce snow levels even further.
Although other than a dusting or as much as an inch or two, accumulations are expected to remain minimal. The weather service estimates that the snow level will reach 1,500 feet by late morning, effectively removing any more sticking snow at the lowest elevations.
Some areas schools are starting classes later in the day, including Woodland schools in Clark County and Corbett schools in east Multnomah County. Some schools are fahren snow fares. See a complete list of closures and delays at the site.
Showers will continue throughout the day Wednesday, but many will be stronger and may include hail or quick bursts of snowfall. There may even be a roll of thunder. The high will be a chilly 45 degrees.
Snow will continue to plummet throughout the day. Winter weather advisories are in place in the Cascades in South Washington and Northern Oregon until 9 p.m. Wednesday. The mountains in Lane County are under a winter storm warning early this morning. Travelers across the mountains should take special care and be prepared for hazardous driving conditions.
As the majority of the precipitation will have moved on, Portland should see a winding down of shower activity by Wednesday night.
After a mostly brief day, Thursday morning will see just rain early in the day as the snow level rises to 1,500 feet. Showers may continue into the afternoon under mostly cloudy skies. This high temperature will be 50 degrees, still 10 degrees or higher than this time of year.
This week, we'll have a weekend off with some sun breaks and a chance to see temperatures in the low 50s for the first time.
Extended predictions are generally averse to more cooler and more wet during the weekend. Saturday will see highs around 50 degrees. Sunday will be mostly cloudy, but temperatures are expected to rise to 58 degrees.
Snow levels will be even higher below Cascade pass levels, with generally about 2,000 feet per day, bringing even more snow to the mountains.
Winter weather will continue in the Pacific NW until Thurs. Heavy snow is expected along the OR Cascades, while other areas will have moderate snow. Check with the WSDOT and ODOT for current road conditions.