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 28 in the Good category measuring Particulate Matter.

Oakridge: The Air Quality Index is 6 in the Good category measuring Particulate Matter.

Cottage Grove: The Air Quality Index is 24 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:

• Mostly sunny and a bit warmer this afternoon, clear tonight,
• Mostly sunny Friday AM, partly cloudy and mild in the afternoon, mostly cloudy Friday night,
• Cloudy Saturday, then a (30%) chance of showers at night.
• highs near 60 lows 37-46.
• Cloudy with rain Sunday, showers Sunday night and 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 58-53 warming to 56 Wednesday 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:

• Clouds clearing to sunny and a bit warmer this afternoon, clear tonight,
• Sunny Friday AM,  partly cloudy in the afternoon, mostly cloudy Friday night,
• Mostly cloudy and a bit cooler with a slight (20%) chance of rain Saturday, then just cloudy with a (30%) chance of showers Saturday night.
• highs 69-62 lows 42-47.
• Mostly cloudy and a bit warmer with rain likely (70%) Sunday AM, rain in the afternoon and 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 62-54 warming to 47 Wednesday 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:

• Sunny and a bit warmer this afternoon, clear tonight,
• Sunny in the AM, mostly cloudy and a bit cooler Friday afternoon, a slight (20%) chance of coastal rain Friday night while a slight (20%) chance of inland rain late at night,
• Mostly cloudy with a (30%) chance of rain and a bit cooler Saturday,  just mostly cloudy Saturday night.
• highs 70-57 lows near 48.
• Mostly cloudy and a bit warmer with rain Sunday and Sunday night,
• Showers and a bit cooler and breezy Monday, showers likely (70%) Monday night and Tuesday, then mostly cloudy with a (40%) chance of showers Tuesday night and Wednesday.
• highs 58-54 lows 47-45. (seasonal averages high 54 low 42).

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Forecast for the Cascades in Lane County:

• Sunny and a bit warmer today, clear tonight,
• Mostly sunny Friday AM, partly cloudy and a bit warmer in the afternoon and Friday night,
• Mostly cloudy and a bit cooler Saturday, then cloudy with a (30%) chance of showers at night.
• free air freezing level 7,500 ft. today, 9,000 ft. tonight through Friday night, 9,000 ft. Saturday, then snow level 7,500 ft. Saturday night.
• highs 47-56 cooling to 54 Saturday lows 27-38.
• Mostly cloudy with rain and a bit cooler Sunday, rain and snow showers Sunday night through Tuesday, mostly cloudy with a good (50%) chance of rain and snow showers Tuesday night, then cloudy with a good (50%) chance of rain and snow showers Wednesday.
• snow level 6,500 ft. Sunday, 5,000 ft. Sunday night, 4,500 ft. Monday, 3,500 ft. Monday night, 3,000 ft. Tuesday, 3,500 ft. Tuesday night and Wednesday.
• highs 47-35 warming to 39 Wednesday lows 30-26.

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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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