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 10 in the Good category measuring Particulate Matter.

Oakridge: The Air Quality Index is 8 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:

• A mix of clouds and sun and a bit warmer this afternoon, partly cloudy this evening, clear with patchy fog late tonight and Thursday AM, sunny and a bit warmer in the afternoon, clear Thursday night,
• Partly cloudy and mild Friday, then partly cloudy Friday night.
• highs 58-62 lows 35-45.
• Mostly cloudy and a bit cooler with a slight (20%) chance of rain Saturday, a slight (20%) chance of showers at night,
• Cloudy with rain likely (70%) Sunday, then showers likely (70%) Sunday night through Tuesday.
• highs 58-55 lows near 45. (seasonal averages high 56 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 cloudy with patchy fog and a slight (20%) chance of rain this AM, just mostly cloudy and a bit warmer this afternoon, partly cloudy this evening, mostly clear with patchy fog late tonight,
• Then patchy mainly AM and late night fog and sunny and a bit warmer Thursday and Friday, clear Thursday night, partly cloudy in the evening and mostly cloudy Friday night,
• highs 62-70 cooling to 67 Friday lows 39-46.
• Mostly cloudy and a bit cooler with a slight (20%) chance of rain Saturday, a (30%) chance of showers at night,
• Cloudy with a good (50%) chance of rain Sunday, showers Sunday night and Monday, then mostly cloudy with rain likely (70%) Monday night and Tuesday.
• highs 62-56 warming to 58 Tuesday lows 44-42. (seasonal averages high 58 low 39).

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

• Mostly cloudy with patchy fog and a slight chance of rain this AM, mostly cloudy at the shore while partly cloudy inland and a bit warmer this afternoon, mostly clear this evening, just partly cloudy with patchy fog late tonight and Thursday AM, sunny and a bit warmer Thursday afternoon, patchy coastal fog, clear late at night,
• Sunny in the AM, partly cloudy and a bit cooler Friday afternoon, then mostly cloudy with a slight (20%) chance of rain Friday night.
• highs 58-68 cooling to 60 Friday lows 43-48.
• Mostly cloudy with a (30%) chance of rain and a bit cooler Saturday, a (30%) chance of showers at night,
• Mostly cloudy with rain likely (60%) Sunday, showers Sunday night and Monday (cooler), then rain likely (70%) Monday night and Tuesday.
• highs 57-54 lows near 47. (seasonal averages high 54 low 42).

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Forecast for the Cascades in Lane County:

• Mostly cloudy with rain and snow likely (70%) this AM, a mix of clouds and sun and a bit warmer with a slight (20%) chance of rain and snow showers this afternoon (under 0.10 in. of rain possible), partly cloudy this evening, just mostly clear tonight,
• Sunny and a bit warmer Thursday, clear at night,
• Mostly sunny Friday AM, then partly cloudy in the afternoon and Friday night.
• snow level 4,500 ft. today, free air freezing level 7,500 ft. tonight, 8,000 ft. Thursday, then 9,000 ft. Thursday night through Friday night.
• highs 42-52 lows 23-36.
• A mix of clouds and sun Saturday, mostly cloudy with a (30%) chance of showers at night,
• Mostly cloudy with rain likely (60%) and a bit cooler Sunday, showers at night,
• Then rain and snow showers likely (70%) and a bit warmer Monday through Tuesday (a bit cooler).
• free air freezing level 9,000 ft. Saturday, snow level 7,500 ft. Saturday night, 7,000 ft. Sunday, 6,500 ft. Sunday night, 5,000 ft. Monday, 4,500 ft. Monday night, then 4,000 ft. Tuesday.
• highs 48-40 lows 37-29.

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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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