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 low trough of low pressure (Shaded “U” shape with blue arrows) still controls our weather and moving slowly to the north. High pressure (Shaded “Arch” shape with blue arrows) will take over by Wednesday. By Saturday a cold front (position shown is Sunday) over the Pacific Ocean moves through and a second cold front moves in behind it.

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Air Quality Index:

Eugene-Springfield: The Air Quality Index is 24 in the Good category measuring Particulate Matter.

Oakridge: The Air Quality Index is 9 in the Good category measuring Particulate Matter.

Cottage Grove: The Air Quality Index is 18 in the Good category measuring Particulate Matter.

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

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Advisories:

• A FLOOD WARNING IS IN EFFECT FOR THE COQUILLE RIVER AT COQUILLE. EXPECTED TO FALL BELOW FLOOD STAGE TONIGHT.

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

• Mostly cloudy with a good (50%) chance of showers this afternoon (0.10 in. of rain possible) and tonight, patchy fog late tonight (under 0.10 in. of rain possible),
• Mostly cloudy with patchy fog and a slight (20%) chance of showers Wednesday AM, a mix of clouds and sun and a bit warmer in the afternoon, mostly clear with patchy fog late Wednesday night and Thursday AM, sunny and a bit warmer in the afternoon, then clear Thursday night.
• highs 52-62 lows 40-34 warming to 36 Thursday night.
• Mostly sunny and a bit warmer Friday, clouds slowly increasing to mostly cloudy late Friday night,
• Mostly cloudy and a bit cooler with a (30%) chance of rain Saturday, a (40%) chance of showers at night,
• Cloudy and a bit cooler with a good (50%) chance of rain Sunday, then cloudy with a good (50%) chance of showers Sunday night and Monday.
• highs 66-56 lows 43-46 cooling back to 43 Sunday night. (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 a good (50%) chance of showers and a bit warmer this afternoon (under 0.10 in. of rain possible, snow level 3,500 ft.), a (30%) chance of showers tonight (under 0.10 in. of rain possible) and patchy fog late,
• Mostly cloudy with patchy fog Wednesday AM, mostly cloudy with a slight (20%) chance of showers and a bit warmer Wednesday afternoon, partly cloudy in the evening, mostly clear with patchy fog late Wednesday night,
• Patchy mainly AM and late night fog and sunny and a bit warmer Thursday, mostly clear at night.
• highs 54-67 lows near 40.
• Patchy AM fog, sunny and a bit warmer Friday, becoming mostly cloudy with a slight (20%) chance of rain Friday night,
• Mostly cloudy and a bit cooler with a slight (20%) chance of showers Saturday, a (30%) chance of showers at night,
• Cloudy with good (50%) chance of rain Sunday, then showers likely (60%) Sunday night and Monday.
• highs 67-59 warming to 62 Monday lows 45-43. (seasonal averages high 58 low 39).

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

• Cloudy with a good (50%) chance of showers this afternoon (0.10 in. of rain possible), mostly cloudy with a (30%) chance of showers with patchy fog tonight (under 0.10 in. of rain possible) and Wednesday AM, a bit warmer with a slight (20%) chance of showers Wednesday afternoon (under 0.10 in. of rain possible), just partly cloudy with patchy fog late Wednesday night,
• Partly cloudy with patchy AM fog, mostly sunny and a bit warmer Thursday afternoon, then mostly clear at night.
• highs 54-64 lows near 43.
• Mostly sunny and a bit cooler Friday, mostly cloudy with a slight (20%) chance of rain Friday night,
• Mostly cloudy with a (30%) chance of showers and a bit cooler Saturday and at night,
• Mostly cloudy with rain likely (60%) Sunday, then showers likely (70%) Sunday night and Monday.
• highs 62-57 lows near 47. (seasonal averages high 54 low 42).

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Forecast for the Cascades in Lane County:

• Cloudy with snow showers this afternoon (0.25 in. of rain possible, 1 in. of snow possible), a good (50%) chance of rain and snow showers tonight (under 0.10 in. of rain possible),
• Mostly cloudy with a (40%) chance of AM rain and snow showers, partly cloudy and a bit warmer with a slight (20%) chance of rain and snow showers Wednesday afternoon, partly cloudy in the evening, just mostly clear Wednesday night,
• Sunny and a bit warmer Thursday, then clear at night.
• snow level 3,000 ft. today, 4,000 ft. tonight, 4,500 ft. Wednesday, free air freezing level 7,000 ft. Wednesday night, 8,000 ft. Thursday, then 9,000 ft. Thursday night.
• highs 36-47 lows 26-28.
• Mostly sunny and a bit warmer Friday, partly cloudy Friday night,
• Mostly cloudy with a slight (20%) chance of rain Saturday, a (30%) chance of showers at night,
• Mostly cloudy with rain likely (60%) and a bit cooler Sunday, then cloudy with a good (50%) chance of showers at night and Monday.
• free air freezing level 8,000 ft. Thursday, 9,000 ft. Thursday night, 8,000 ft. Friday, 9,000 ft. Friday night, snow level 7,500 ft. Saturday and Saturday night, 6,500 ft. Sunday, 6,000 ft. Sunday night, then 5,000 ft. Monday.
• highs 46-42 lows 35-32.

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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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