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Here is my weather quiz question for this week. Since I have had web access issues this week  I will give you an extra day (Saturday) to  come up with the correct answer. What is the “Green Sky” effect? Please place your answer as a comment after the forecasts. The first person to post the correct answer will win one week of free personalized weather forecasts tailored to your needs. Good luck.

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A high pressure ridge coming out of the Gulf of Alaska  (the “arch” formed by the blue arrows offshore aimed at Canada) and  surface high pressure (the “H” off the Oregon coast) are drying us out and warming  us up with temperatures getting above average for the interior valleys. High pressure will weaken and allow low pressure to take over toward the end of the weekend into next week allowing a series of storms to move through the Pacific Northwest.

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Advisories:  NONE AT THIS TIME

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The Updated Pollen Count Forecast for the Eugene-Springfield area : Trees MODERATE, Grass LOW, weeds Absent.

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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: Partly cloudy tonight and a mix of clouds and sun Saturday and partly cloudy Saturday night lows 42-46 high 73. A mix of clouds and sun Sunday morning then mostly cloudy with a slight (20%) chance of showers in the afternoon and (40%) Sunday night high near 74 low near 47. AM clouds then a mix of clouds and sun Monday with a good (50%) chance of showers and partly cloudy in the evening then mostly cloudy with a good (50%) chance of showers Monday night high 69 low 46. AM clouds then a mix of clouds and sun Tuesday with a (40%) chance of showers then partly cloudy in the evening and mostly cloudy at night with a (30%) chance of showers high 63 low near 45. Mostly cloudy with a (30%) chance of showers Wednesday then mostly cloudy in the evening and partly cloudy at night with a (30%) chance of showers high 64 low 43 . A mix of clouds and sun Thursday morning then becoming mostly cloudy with a (30%) chance of showers in the afternoon and Thursday night and mostly cloudy with a (30%) chance of showers Friday  highs 63-65 low 43 .

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Forecast for the Umpqua Basin including Roseburg: Partly cloudy this evening then mostly cloudy late tonight and partly cloudy Saturday morning then mostly cloudy Saturday afternoon and night with a slight (20%) chance of evening thunderstorms lows 48 high 79. Mostly cloudy with a slight (20%) chance of showers Sunday afternoon and and evening then mostly cloudy with a good (50%) chance of showers Monday highs 77 cooling to 67 low 48. Mostly cloudy with evening showers likely (60%) then a good (50%) chance of showers late Monday night low 50 . Mostly cloudy with a (30%) chance of showers Tuesday through Wednesday highs 70-73 low 46 . A slight (20%) chance of showers Wednesday night then a (30%) chance of showers Thursday through Friday lows 45-43 highs 68 cooling to 63 .

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Forecast for the South Oregon Coast including Coos Bay and North Bend: Partly cloudy this evening and becoming mostly cloudy tonight through Sunday night lows near 50 highs 60-63. Mostly cloudy with a (40%) chance of showers Monday AM then likely (60%) in the afternoon and a good (50%) chance of showers Monday night with a (30%) chance through Thursday and (40%) Thursday night and Friday highs 63-56 lows 50-46  .

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Forecast for the Cascades of Lane County:  Partly cloudy this evening with a slight (20%) chance of thunderstorms free air freezing level 10,000 ft. low 35. A mix of clouds and sun Saturday with a slight (20%) chance of afternoon showers, partly cloudy in the evening then mostly cloudy with a slight (20%) chance of showers snow level above 8,000 ft. high 66 low 37. Partly cloudy  with a (30%) chance of AM showers Sunday then mostly cloudy a (40%) chance of showers and a slight (20%) chance of afternoon thunderstorms snow level above 8,000 ft. high 67. Mostly cloudy with a (40%) chance of evening showers and a slight (20%) chance of thunderstorms then a good (50%) chance of showers Sunday night snow level above 8,000 ft. low 40. Mostly cloudy with showers likely (60%) Monday and Monday night snow level 8,000 ft high 52 low 32 . Mostly cloudy with a (40%) chance of showers Tuesday through Wednesday snow level 6,000 ft. rising to 7,000 ft. Tuesday night highs 50-56 low 30. Mostly cloudy Wednesday evening then partly cloudy with a (30%) chance of showers at night, a mix of clouds and sun Thursday morning then mostly cloudy with a (30%) chance of showers Thursday night and Friday snow level 7,000 ft. Wednesday night, and 6,500 ft. Thursday through Friday lows 28 highs 49-52 .

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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.