EUGENE, Ore. -- A moist onshore flow will continue on Thursday, with most of showers along the coast and the higher elevations. This is due to an atmospheric river riding over upper ridge of high pressure. That ridge is also providing milder temperatures on Thursday, which will be in the 50s.
Thursday: Mostly cloudy w/ slight chance. Snow level 5,500 ft. Highs in middle 50s.
Friday: Mostly cloudy w/ showers late. Snow level 5,500 ft. Highs in middle 50s.
Saturday: Mostly cloudy w/ showers. Snow level 2,500 ft. Highs in upper 40s.
Sunday: Mostly sunny. Highs in upper 40s.
Monday: Mostly sunny. Highs in upper 40s.
Tuesday: Mostly cloudy w/ Isolated showers. Snow level 2,000 ft. Highs in middle 40s.
Wednesday: Mostly cloudy w/ Isolated showers. Snow level 1,500 ft. Highs in middle 40s.
This pattern is expected to continue through Friday morning, especially across northwestern Oregon. As the ridge shifts to the east on Thursday night into Friday morning, there will be burst of heavier rain along the coast and higher terrain.
A cold front will push through Friday night into Saturday. This will bring heavier showers to the region, including the interior valleys, which have seen little rain the last few days.
In addition to showers, the snow level will drop to 2,500 feet, bringing a little snow into the higher foothills. Right now, models point to 5 to 10 inches of new snow in the Cascades through Saturday afternoon above 3,500 feet. This means travel over the Cascade Passes on Saturday will likely be impacted.
Drier weather will return on Sunday and Monday, with sunshine and highs in the upper 40s and low 50s. The normal high temperature for the date is 49 degrees in Eugene. With the clearer skies during this time, look for overnight low temperatures to fall into the 30s.
An upper-level trough in the jet stream will drop out of Canada on Tuesday and Wednesday, bringing more showers. This trough will also bring cooler air with it, dropping snow levels to as low as 1,000 feet. At this time, no snow is expected on the valley floor.
For more information, visit the KEZI 9 News StormTracker 9 weather page.