An upper level low (shaded area) is bringing cold Arctic air through Canada to us. A colder blast of Arctic air is moving in from the North producing  maybe a few snow flurries, but again no accumulation expected, so far anyway. The colder weather will last well into next week.

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For the Willamette Valley: Today will see mostly sunny skies but cold  high right around freezing at 30-33, then mostly clear and even colder at night low in the low teens. A mix of clouds and sun again Tuesday high near 33-35. Partly cloudy at night low still in the teens near 17. Wednesday mostly sunny  high 35-38 and mostly clear and not quite as cold overnight  low 23-26. There  will be a mix of clouds & sun Thursday high 37-40 low 24-29. Friday a mix of clouds & sun high near 40 mostly cloudy at night with a (40%) chance of rain or snow low 28-30. Mostly cloudy and warmer with a (50%) chance of rain  Saturday high near 45.  Saturday night and Sunday will be mostly cloudy with a (50%) chance of rain low 38 high 42-44.

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For the Umpqua Basin: Mostly cloudy this morning then partly cloudy this afternoon high low to mid 30s . Partly cloudy this evening and clearing later low 15-20. Sunny in the AM Tuesday then partly cloudy high in the mid 30s partly cloudy at night low near 20. Partly cloudy Wednesday and Thursday highs 30s to 40s lows in the mid 20s. Thursday night a slight (20%) chance of rain or snow showers low low to mid 30s. Friday mostly cloudy with a (50%) chance of showers high low to mid 40s  Rain will be likely (60%) Saturday through Sunday highs low to mid 40s lows low to mid 30s.

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Advisories: For the South Oregon Coast:  A FREEZE WARNING IS IN EFFECT FROM 11 PM TONIGHT  THROUGH 9 AM TUESDAY. A FREEZE WATCH IS IN EFFECT TUESDAY EVENING THROUGH WEDNESDAY MORNING .

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Forecast for the South Coast: Skies will be partly cloudy today through Tuesday morning, Mostly cloudy Tuesday afternoon, partly cloudy Wednesday through through Thursday. Highs will be in the mid 40s and lows in the mid to upper 20s through Thursday, rising to highs near 50 and lows from the low 30s warming to upper 30s Friday through Monday. Mostly cloudy with a slight (20%) chance of showers Thursday night, (60%) chance of showers Friday, then a 70% chance of rain Saturday through Sunday.

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For the Cascades:  The snow level will be at the surface today then a free air freezing level at the surface through Tuesday night, staying below pass levels through Thursday night. Friday through Sunday it will be a snow level below the passes with rain and snow likely for Saturday and Sunday.

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Here is my weather quiz question for this week. I picked this one because of our colder than normal temperatures. What time zone or zones help to tell the time at both the North and South Poles? Please place your question as a comment after this post. The first person to post the correct answer  will win one free week of personalized forecasts tailored to your needs. Good luck.