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Here is my weekly weather quiz question.  What location in the world set the record for the most snowfall in one season? Extra congratulations if you know the total snowfall measured and when it occurred. 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 High Pressure ridge has weakened (See the “Arch” shaped area) and moved to the East.  A trough of low pressure is moving toward us (See “U” shape ) and another low moved through Southern Oregon and Northern California yesterday producing some thunderstorms. Even if you didn’t have a thunderstorm over you the temperature has dropped significantly. A cold front (Position on Saturday AM) will be moving through Oregon between Thursday and Friday. All of those combine to produce cooler weather with increased onshore airflow over the Pacific Northwest.

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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:  Mostly clear tonight and Thursday night,  AM clouds then mostly sunny Thursday, mostly sunny and a bit cooler Friday, mostly clear Friday evening, and mostly cloudy at night lows 46-48 highs 82-78. AM clouds then a mix of clouds and sun and cooler Saturday and Sunday, partly cloudy Saturday evening and mostly cloudy at night, and partly cloudy Sunday night highs 78-74 lows near 48. A mix of clouds and sun and slightly warmer Monday through Wednesday with  partly cloudy nights highs 83-86 cooling to near 80 Wednesday lows 48-52. (seasonal averages high 82 low 51)

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Forecast for the Umpqua Basin including, Roseburg:  Mostly clear in the evening and partly cloudy at night tonight and Thursday night, sunny Thursday and Friday, mostly clear Friday evening, then mostly cloudy at night lows 56-53 highs 86-82.  Mostly cloudy Saturday,  Saturday night, and Sunday AM, then partly cloudy Sunday evening and clearing late at night highs 77-73 lows near 52. Sunny Monday through Wednesday, and clear at night  highs 80-88 cooling to 85 Wednesday lows near 53. (seasonal averages high 86 low 55)

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Forecast for the South Oregon Coast including Coos Bay and North Bend:  Partly cloudy in the evening and mostly cloudy at night with patchy coastal fog late tonight, Thursday night, and Friday night, and sunny Thursday and Friday afternoons lows from 46 to 50 highs 63-65. Mostly cloudy Saturday, mostly cloudy with patchy fog Saturday night and cooler Sunday, partly cloudy Sunday evening then clearing Sunday night highs 62-58 lows near 46. Sunny Monday through Wednesday and clear each night highs stable at 63 lows 48-50. (seasonal averages high 68 low 53).

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Forecast for the Cascades of Lane County:  Mostly clear tonight and Thursday night, and mostly sunny Thursday and Friday free air freezing level of 14,000 ft. tonight falling to 13,000 ft. Thursday night and Friday lows 45-40 highs 70-72. Partly cloudy Friday night and Saturday night, A mix of clouds and sun Saturday, partly cloudy with a slight (20%) chance of showers and cooler late Saturday night, Sunday, and Sunday evening, and partly cloudy Sunday night  free air freezing level 11,000 ft. Saturday lowering to a snow level above 8,000 ft. Saturday night through Sunday night lows near 40 highs 68-62. Mostly sunny  and warming a bit Monday through Wednesday, mostly clear at night free air freezing level 12,000 ft. Monday, rising to 13,000 ft. Monday night through Wednesday highs 75-77 lows near 45.

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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.