A high pressure ridge that is over the Pacific Northwest will continue protecting us until late Friday. That’s when a new cold front will move in from the Gulf of Alaska. This front will be weak and produce very little precipitation which could fall in the form of snow flurries. The bigger threat of a wintery mix will move in by Wednesday.

For the Willamette Valley: Skies will be mostly cloudy with fog and freezing fog overnight low 23. Friday morning will start off with more  fog and freezing fog (watch out for slippery roads) then a mix of clouds & sun in the afternoon (if we are lucky) high near 44-47. Mostly cloudy & not as cold Friday night low 24-27. A mix of clouds and sun  Saturday and cooler high 42-44. Partly cloudy at night low 24. Partly cloudy Sunday with a slight (20%) chance of light snow and a slight chance of snow showers at night high in the upper 30s low in the upper teens (yes I said teens). Monday will be partly cloudy with a slight chance of showers, then mostly cloudy at night with a slight chance of showers high 36 low 22. Those showers at night could be snow showers down to 1,000′.  A mix of clouds and sun Tuesday high near 38. Partly cloudy with just a slight (20%) chance of rain at night low 26. Wednesday and Wednesday night will be mostly cloudy with a (60%) chance of rain high 43 low 34. Rain will be likely (60%) Thursday high 44.

For the Umpqua Basin the daytime highs will be a bit cooler than the Willamette Valley through Sunday then even Monday and a touch warmer Tuesday through Thursday. Overnight low temperatures will be about 5 degrees warmer than the Willamette Valley through Saturday night and about the same as the Willamette Valley through Thursday.

At the Coast high temperatures  and lows will range from 3-5 degrees warmer that the Willamette Valley.

For the Cascades:  The free air freezing level will be at 6,000′ tonight, up to 7,000′ late at night the 5,000′  Friday. The snow level will fall to well below the passes and stay there Saturday through Thursday. The best chance for snow accumulation will be Wednesday night and Thursday.