Here is this week’s weather quiz question. What is the best tornado detector? Please place your answer as a comment after the forecasts on this page. The first person to post the correct answer will win one week of free personalized forecasts tailored to your needs. Good luck.

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A trough of low pressure (shaded area that’s “U” shaped touching the coast)  is pumping cool moist air in behind the frontal system that passed through on Monday. The upper trough will slowly migrate to the east over us keeping the chance for wet weather and cooler temperatures with us for a while. High pressure will build in late in the week. So far, it looks like another nice weekend ahead. We can hope.

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Advisories: NONE AT THIS TIME.

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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 and Albany-Corvallis: Mostly cloudy with showers and a slight (20%) chance of  evening thunderstorms with small hail possible then showers likely (60%) tonight low near 40. Mostly cloudy with showers likely (60%) Wednesday and Wednesday night with a slight (20%) chance of afternoon and evening thunderstorms high 55 low 39. Showers likely  (60%) chance Thursday and a (40%) chance of showers Thursday night, (30%) Friday, and a slight (20%) chance of showers Friday evening  highs 55-58 lows 40-42. A mix of clouds and sun Saturday and partly cloudy Saturday night high 62 low 43. Partly cloudy skies Sunday through Tuesday with a slight (20%) chance of showers  highs 66-62 low 43.

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Forecast for the Umpqua Basin including Roseburg: Mostly cloudy showers and isolated thunderstorms this evening then rain and snow showers late tonight (snow level 3,000 ft.) low 40. Rain and snow showers Wednesday with possible isolated thunderstorms ( snow level 3,000 ft.) then rain and snow showers in the evening and showers likely (60%) late Wednesday night high 50 low 42. Mostly cloudy with rain and snow showers Thursday morning with afternoon showers then a (40%) chance of showers Thursday night snow level 3,000 ft. high 50 low 38. Mostly cloudy with a good (50%) chance of AM rain and snow showers Friday morning and a slight (20%) chance of showers Friday afternoon then just mostly cloudy Friday night  high 60 low 43 . Partly cloudy Saturday then mostly cloudy at night high 67 low 43. Partly sunny Sunday with a slight (20%) chance of afternoon showers then a (30%) chance of showers Sunday night and Monday highs 69-66 low 42. Mostly cloudy with a slight (20%) chance of showers Monday night and a (30%) chance of showers Tuesday low 42 highs 63 .

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Forecast for the South Oregon Coast including Coos Bay and North Bend:  Mostly cloudy with showers and isolated thunderstorms tonight at the shore and this evening inland then showers late tonight inland low 42. Showers and isolated thunderstorms Wednesday high 49. Evening showers  then showers likely (60%) late Wednesday night low 44. Mostly cloudy with showers Thursday and a good (50%) chance of showers Thursday night high 50 low near 40. Mostly cloudy with a (30%) chance of showers and a bit warmer Friday then mostly cloudy Friday night high 57 low 45. Partly cloudy Saturday and Saturday night, then partly cloudy Sunday with a slight (20%) chance of afternoon showers highs near 60 low 43. Mostly cloudy with a chance of showers Sunday night and Monday with a slight (20%) chance of showers Monday night and a (30%) chance of showers Tuesday lows near 44-42 highs 56-54.

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Forecast for the Cascades of Lane County:  Mostly cloudy with rain and snow showers tonight snow level  3,500 ft. 1-4 in. of snow possible low 27. Snow showers Wednesday snow level 2,500 ft. 1-4 in. of snow possible then rain and snow showers Wednesday night snow level 3,500 ft. falling to 2,500 ft. at night 1-3 in. of snow possible high 37 low 27. Snow showers Thursday with rain and snow showers likely (60%) Thursday night snow level 2,500 ft. rising to 3,000 ft. in the afternoon and at night high 39 low 25. Mostly cloudy with a good (50%) chance of showers Friday and a (30%) chance showers Friday night snow level 3,500 ft. in the afternoon and 4,000 ft. at night high 45 low 29 . Partly cloudy with a slight (20%) chance of showers Saturday then mostly cloudy with a slight (20%) chance of showers Saturday night through Sunday night snow level 5,500 ft. Saturday, 6,000 ft. Saturday night and Sunday, then 6,500 ft. Sunday night highs 49-54  lows near 30. Partly cloudy with a slight (20%) chance of showers Monday through Tuesday 7,000 ft. Monday, 6,000 ft. Monday night, 5,500 ft. Tuesday highs 55-48 low 32.

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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.