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Here is my weekly weather quiz question. What is the wettest place in the world? An extra cheer for you if you can tell me the average rainfall there. Please post your answer as a comment after the forecasts. The first person to post the correct answer will win a week of free personalized weather forecasts tailored to your needs. Good luck.

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An upper level low will slide into the low pressure trough over Washington and Oregon (see “U” shape formed by the blue arrows) keeping us in the onshore air flow as it moves to the East. High pressure will start to build up Friday giving us offshore flow and warming us up quite a bit Saturday and Sunday. Another trough of low pressure will move in Monday cooling us back down again.There is still smoke high in the atmosphere over us from Canadian fires. So far that smoke has not come down to the surface. Smoke is still collecting over the Deschutes National Forest near Sisters and could slowly move toward us if and when the offshore airflow returns pushing the smoke from East to West.

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Advisories: NONE AT THIS TIME.

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The summer Pollen Count Forecast season for the Eugene-Springfield area is over. From Allergy and Asthma Research Group.

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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, a mix of clouds and sun and warmer Wednesday and Thursday, partly cloudy Wednesday night and mostly clear Thursday night lows 52-54 highs 82-87. Mostly sunny and warmer Friday and Saturday, cooling slowly Sunday through Tuesday highs 90-95 cooling to 89-76 Sunday through Tuesday lows 55-50.  (seasonal averages high 82 low 51)

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Forecast for the Umpqua Basin including, Roseburg:  Mostly cloudy tonight and Wednesday AM, mostly sunny in the afternoon, mostly clear Wednesday night, sunny and warmer Thursday, mostly clear in the evening, and partly cloudy Thursday night lows 55-55-57 highs 82-92. Mostly sunny and warmer Friday and Saturday, mostly sunny with slow cooling Sunday and Monday, mostly clear nights, highs near 95 cooling 89-84 lows 58-54. Sunny and cooler Tuesday  high 83 . (seasonal averages high 87 low 55)

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Forecast for the South Oregon Coast including Coos Bay and North Bend: Mostly cloudy tonight and Wednesday AM with patchy coastal fog, partly cloudy in the afternoon and evening,  mostly cloudy Wednesday night and Thursday AM, sunny Thursday afternoon, partly cloudy in the evening and mostly cloudy Thursday night lows 53-55 highs 63-67. Mostly cloudy Friday through Saturday, mostly cloudy with patchy fog Saturday night and Sunday highs 66-62 lows 55-52.  Partly cloudy Sunday evening, becoming mostly cloudy at night and Monday through Tuesday  lows near 54 highs 65-60. (seasonal averages high 68 low 53).

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Forecast for the Cascades of Lane County:  Partly cloudy with a slight (20%) chance of  and thunderstorms this evening, a slight (20%) chance  showers late tonight, a mix of clouds and sun Wednesday and Thursday, partly cloudy Wednesday night, and mostly clear Thursday night snow level above 8,000 ft. tonight, then a free air freezing level of 12,000 ft. Wednesday, 13,000 ft. Wednesday night, and 15,000 ft. Thursday and Thursday night lows 44-50 highs 68-80. Mostly sunny Friday, clear Friday night, sunny Saturday and Sunday, and clear Friday night and Saturday night, mostly clear Sunday night free air freezing level rising to 16,000 ft. highs 85-87-84  lows 50-46. Mostly sunny Monday, mostly clear at night, then mostly sunny Tuesday with a slight (20%) chance of afternoon rain highs 83-80 low 46.

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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.