Here is my new weekly weather quiz question. What is  the “Photosphere?” Please remember to post your answer as a comment by clicking on “no comments /comments” in the upper right hand portion of this page under the caption, then add your comment. The first person to post the correct answer will win a week of free personalized weather forecasts tailored to your needs. The answer has to be a comment to win. An email answer will not count. Good luck.

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An upper level high pressure ridge (Shaded “Arch” shape with blue arrows) is taking over clearing the skies. By Saturday a a cold front will move in and a second cold front is over the Pacific Ocean not too far behind it. And here’s another frontal system approaching the coast Tuesday.

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Air Quality Index:

Eugene-Springfield: The Air Quality Index is 12 in the Good category measuring Particulate Matter.

Oakridge: The Air Quality Index is 3 in the Good category measuring Particulate Matter.

Cottage Grove: The Air Quality Index is 11 in the Good category measuring Particulate Matter.

Data courtesy of Lane Regional Air Protection Agency (LRAPA).

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Advisories: None At This Time.

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Forecast for the Southern and lower Mid Willamette Valley including Eugene-Springfield and Albany-Corvallis:

• Partly cloudy this evening, clear with patchy fog late tonight and Thursday AM, mostly sunny and a bit warmer in the afternoon, clear Thursday night,
• Mostly sunny Friday AM, partly cloudy and mild in the afternoon and evening, mostly cloudy Friday night,
• Mostly cloudy with a slight (20%) chance of rain Saturday, then a slight (20%) chance of showers at night.
• lows 35-46 highs near 60.
• Cloudy with rain likely (70%) Sunday, showers likely (70%) Sunday night,
• Showers and a bit cooler Monday, showers likely (70%) at night and Tuesday, partly cloudy with a (40%) chance of showers Tuesday night,
• Then a mix of clouds and sun with a (30%) chance of showers Wednesday.
• highs 59-54 lows 45-40. (seasonal averages high 57 low 37).

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Home Wood Heating Advisory:

Eugene-Springfield: GREEN – Burning is Allowed.

Oakridge: GREEN – Burning is Allowed.

*Note: Pellet stoves may be used anytime if they produce no visible emissions.

Advisory Courtesy of Lane Regional Air Protection Agency (LRAPA).

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Forecast for Roseburg:

• Mostly clear with patchy fog late tonight and Thursday AM, sunny and a bit warmer Thursday and Friday, clear Thursday night, partly cloudy in the evening and mostly cloudy late Friday night,
• Mostly cloudy and a bit cooler with a slight (20%) chance of rain Saturday, then just cloudy Saturday night.
• lows 40-47 highs 69-62.
• Mostly cloudy and a bit warmer with rain likely (70%) Sunday, showers likely (70%) Sunday night,
• Showers and a bit cooler Monday, showers likely (70%) at night,
• Mostly cloudy with rain and snow showers likely (70%) Tuesday, then mostly cloudy with a (30%) chance of showers Tuesday night and Wednesday.
• highs 65-58 lows 45-40. (seasonal averages high 58 low 39).

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Forecast for The South Oregon Coast Including Coos Bay and North Bend:

• Mostly clear with patchy fog late tonight,
• Partly cloudy with Thursday AM, sunny and a bit warmer Thursday afternoon, clear at night,
• Sunny in the AM, partly cloudy and a bit cooler Friday afternoon, mostly cloudy with a slight (20%) chance of coastal rain Friday night while a slight (20%) chance of inland rain late at night,
• Mostly cloudy with a slight (20%) chance of rain and a bit cooler Saturday,  just mostly cloudy Saturday night.
• lows 44-48 highs 67-57.
• Mostly cloudy and a bit warmer with rain likely (60%) Sunday, showers likely (70%) Sunday night,
• Showers and a bit cooler Monday, showers likely (70%) Monday night and Tuesday, then mostly cloudy with a (40%) chance of showers Tuesday night and Wednesday.
• highs 62-55 lows 48-45. (seasonal averages high 54 low 42).

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Forecast for the Cascades in Lane County:

• Partly cloudy this evening, clear late tonight,
• Sunny and a bit warmer Thursday, clear at night,
• Mostly sunny Friday AM, partly cloudy and a bit warmer in the afternoon and Friday night,
• Mostly cloudy and a bit cooler Saturday with a slight (20%) chance of afternoon rain, then cloudy with a (30%) chance of showers at night.
• free air freezing level 6,500 ft. tonight, 8,000 ft. Thursday, 9,000 ft. Thursday night through Friday night.
• lows 24-38 highs 47-56 cooling to 54 Saturday.
• Mostly cloudy with rain and a bit cooler Sunday, showers at night,
• Mostly cloudy with rain and snow showers likely (70%) and colder Monday, rain and snow showers likely (70%) Monday night and Tuesday, then mostly cloudy with a good (50%) chance of rain and snow showers Tuesday night and Wednesday.
• snow level 7,000 ft. Sunday, 6,500 ft. Sunday night, 4,500 ft. Monday, 4,000 ft. Monday night, 3,500 ft. Tuesday, 4,000 ft. Tuesday night, then 3,500 ft. Wednesday.
• highs 50-37 lows 33-28.

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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.

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Get your local Eugene-Springfield and Lane County news on-line at eugenedailynews.com.

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