PORTLAND, Ore. - A steady rain pelted Portland on Monday as people returned to their jobs following the Christmas holiday weekend. More rain is expected overnight.
The National Weather Service has issued a winter storm warning for the Cascades in Southwest Washington and Northern Oregon through 10 p.m Tuesday. KATU Meteorologist Dave Salesky says there could be up to 20 inches of snow Monday night in the Cascades and up to 10 inches Tuesday.
KATU Storm Team forecasters are watching the weather develop and warn cold air will follow the latest storm as it passes over the region, bringing the possibility of snow down to the 500 foot level - or lower, depending on how conditions shake out.
However, Salesky says most of the moisture will have moved east of town by Wednesday morning when it gets cold enough for snow. But there could be an inch of snow at places above 500 feet. It will likely be a rain-mix on the valley floor.
Temperatures will reach the upper 30s and low 40s by the afternoon.
Watch the latest forecast:
National Weather Service "Special Weather Statement" issued at noon on Monday:
After a mild start to the last week of the year...a cold front will push across the region Tuesday night...usering in much colder weather. In the lowlands...overnight lows expected in the middle to upper 20s...while the afternoon high temperatures will likely be only in the 30s. Temperatures will be colder in the Cascades.
This is not an artic outbreak of air...and not a lot of east wind is expected. However...it will be cold enough to see snow showers Wednesday into Thursday. At this time...snow accumulations are expected to be light...through an inch or two are possible above 500 feet...or on higher hills of the interior valleys.
Over the coast range and the cascades...potential for snow is better. At this time...there is potential for 3 to 6 inches of snow in the coast range above 1000 feet...and perhaps 5 to 10 inches in the Cascades.
Another fast moving system will pass across the region Friday and Saturday...with another chance of snow showers.
If you are planning travel over the mountains and through the woods later this week...monitor the latest weather forecasts and possible warnings or advisories. Be prepared for wintery driving conditions...especially over the Cascades Range.