EUGENE, Ore. - The moisture soaking the Northwest will be on its way out just as a blast of Arctic air moves the freezing level down to the valley floor, the National Weather Service said Monday.
The mountains won't escape this wintry weather: Conditions are right for another 4 to 8 inches of snow at the pass levels in the Cascades and up to a foot above 5,500 feet.
CAMERAS: Santiam Pass | Willamette Pass
For skiers, that's good news: Mount Bachelor and ski areas on Mount Hood are already open, and the base elevation at Willamette Pass Ski Resort is 5,120. | Ski and Snow Report
However, school children in Eugene and Springfield hoping for a snow day Tuesday might be disappointed. | School Closures & Delays
"Big question remains as to what happens tonight," forecasters wrote in the short term weather forecast discussion. "Showers will be decreasing. However, air mass will be cooling rapidly tonight. It will be cold enough for snow at valley floors by Tuesday morning but probably not in time to see anything more than some flurries or mixed rain and snow showers in the Willamette Valley as the precipitation comes to an end."
That doesn't mean the weather couldn't create hazardous conditions in town.
"Roads will gradually dry, but any residual moisture may well freeze later tonight, especially on lesser traveled roadways and areas where plenty of leaves are still on streets," forecasters said. "Motorists should be prepared for locally icy spots on roads in valleys later tonight and Tuesday morning."
In the mountains, forecasters have issued a winter weather advisory for snow and blowing snow, in effect until 7 p.m.
Snow levels will drop below 3,000 feet this afternoon and 2,000 feet by evening.
"Roads will become snow covered and hazardous," forecasters said. "Periods of snow will cause primarily travel difficulties. be prepared for snow covered roads and limited visibilities, and use caution while driving."