Here again is my weekly weather quiz question. What is the difference between  freezing rain and sleet? Please post your answer as a comment after the forecasts on this page. The first person to post the correct answer will win one free week of personalized forecasts tailored to your needs.

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High Pressure (the arch-shaded and with blue arrows-moving ashore) is moving away from us to be replaced, temporarily by  a low pressure trough (the “U” shape shaded with blue arrows in it) which will push a new frontal system into Oregon. High pressure will return for a while and then it’s back to low pressure and more storms next week.

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Advisories: A WINTER WEATHER ADVISORY IS IN EFFECT FROM MIDNIGHT TONIGHT THROUGH 6 PM THURSDAY FOR THE NORTH CASCADES AND THE CASCADES OF LANE COUNTY.

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Here are your detailed forecasts. **

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Forecast for the Southern and lower Mid Willamette Valley including Eugene-Springfield:  Partly cloudy with a slight chance of rain this evening, becoming mostly cloudy at night with rain developing late tonight low 38. Mostly cloudy with AM rain Thursday then afternoon showers likely (60%) and much cooler high 48. Partly cloudy Thursday evening then mostly cloudy with a slight (20%) chance of showers Thursday night low 34. Mostly cloudy Friday morning with a slight (20%) chance of showers a mix of clouds and sun in the afternoon with a slight (20%) chance of afternoon sprinkles,  just partly cloudy Friday night high 54 low 33. A mix of clouds and sun and warmer Saturday then mostly cloudy with a slight (20%) chance of showers Saturday night through Sunday night lows near  36-38 highs 57-52. Mostly cloudy with a (30%) chance of rain Monday through Tuesday highs 52-55 low 35. A good (50%) chance of showers Tuesday night and (40%) Wednesday low 36 high 56.

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Forecast for the Umpqua Basin including Roseburg: Partly cloudy this evening then cloudy with rain late tonight low 40. Cloudy with AM rain Thursday then a slight (20%) chance of afternoon showers then mostly cloudy Thursday night  and Friday highs 50-57 low 36. Partly cloudy Friday night and Saturday morning then mostly cloudy with a slight (20%) chance of showers Saturday afternoon through Sunday night lows near 42 highs 59-54 . Mostly  cloudy with a (20%) chance of rain Monday and Monday night high 59 low 38. Mostly cloudy with a (40%) chance of rain and snow Tuesday, Tuesday night, and Wednesday  highs near 57 low 40.

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Forecast for the South Oregon Coast including Coos Bay and North Bend:  Partly cloudy this evening then becoming cloudy with rain late tonight  low 42. Cloudy with AM rain Thursday then a slight  (20%) chance of afternoon showers high 52.  Mostly cloudy Thursday night then mostly cloudy with a slight (20%) chance of showers Friday morning low 35 high 55. Partly cloudy Friday night and Saturday morning then mostly cloudy Saturday afternoon low 38 high 50. Mostly cloudy with a slight (20%) chance of showers Saturday night through Sunday night low 40 high 54 . Mostly cloudy with a (20%) chance of rain Monday through Tuesday night highs 53-58 lows 42 . Mostly cloudy with a (40%) chance of showers Wednesday high 56.

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Forecast for the Cascades of Lane County:  Mostly cloudy this evening with a slight (20%) chance of rain this evening then snow late tonight snow level 3,500′ 4-8″ of snow possible low 26.  Morning snow then afternoon then snow showers and colder Thursday afternoon snow level 3,500′ in the afternoon 6-10″ of snow possible high 34 . Cloudy with a (30%) chance of snow showers breezy and colder Thursday night (winds Southwest 5-15  mph gusts to 35 mph) low 20. A (30%) chance of scattered snow showers Friday morning then a slight (20%) chance of rain and snow showers in the afternoon snow level 3,000′ rising to 3,500′ high 35. Partly cloudy Friday night with a slight (20%) chance of evening snow showers snow level 3,000′ low 23. A mix of clouds and sun Saturday with a slight (20%) chance of rain and snow showers  in the afternoon snow level 3,500′ high 44.  Mostly cloudy Saturday night  with a (30%) chance of snow showers and a slight (20%) chance of rain showers snow level 4,500′ low 26. A (40%) chance of rain and snow showers Sunday and Sunday night snow level 4,000′ high near 40 low 25. Mostly cloudy with a (50%) chance of rain and snow Monday through Tuesday snow level 4,000′ falling to 3,500′ Tuesday highs 43-38 low 25 . Mostly cloudy with a good (50%) chance of  rain and snow showers Tuesday night and Wednesday snow level 3,500′ rising to 4,000′ Wednesday low 25 high 42.

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**Because weather forecasting is a combination of science, intuition, and timing there can be no absolute guarantees that individual forecasts will be 100% accurate. Nature is in a constant state of flux and sudden unexpected weather events can happen.