Here is my weekly weather quiz question. What is  “Aphelion?”  Please remember to post your answer at the bottom of this page. 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  (Shaded “Arch” with blue arrows) has cleared us out and returned the sunshine, but it won’t last. The graphic for days 1-3 shows the front moving southward to Oregon Friday. The graphic for days 3-7 shows a frontal system headed for us next Tuesday. For mountain snow conditions at the local ski areas check out their websites or give them a call.

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Air Quality Index:

Eugene-Springfield: The Air Quality Index is 5 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 1 in the Good category measuring Particulate Matter.

Data courtesy of Lane Regional Air Protection Agency (LRAPA)

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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.

Data courtesy of Lane Regional Air Protection Agency (LRAPA)

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Advisories:

• A Permanent Health Advisory remains in effect for the South Umpqua River and Lawson Bar. Pools in the bedrock along the rivers edge are known to develop Blue-green Algae (cyanobacterial) blooms that can be harmful to pets and people if accidental ingestion occurs. Signs have been posted along several access areas along the river.

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

• Mostly cloudy with areas of fog late tonight,
  Cloudy with areas of AM fog, a slight (20%) chance of rain and a bit cooler Thursday afternoon (under 0.10 in. of rain possible), a good (50%) chance of rain at night (under 0.10 in. of rain possible),
• Mostly cloudy with a good (50%) chance of AM rain, rain and a bit cooler Friday afternoon (0.25 in. of rain possible) and evening, showers late Friday night (0.50 in. of rain possible),
• Mostly cloudy and a bit cooler with rain Saturday, then showers at night.
• lows 35-40 cooling back to 35 Saturday night highs 52-49.
• Mostly cloudy and a bit cooler with rain and snow showers likely (70%) Sunday (snow level 1,000 ft.), showers likely (70%) Sunday night,
• Mostly cloudy and a bit warmer with showers Monday, showers likely (70%) and a bit warmer Monday night through Tuesday night,
• Then cloudy with a good (50%) chance of rain and a bit warmer Wednesday.
• highs 44-52 lows 36-40. (seasonal averages high 54 low 36)

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Forecast for Roseburg:

• Partly cloudy this evening, mostly cloudy with patchy fog and freezing fog late tonight and Thursday AM, mostly cloudy and a bit warmer in the afternoon, a slight (20%) chance of rain late at night (under 0.10 in. of rain possible),
• Mostly cloudy with a good (50%) chance of rain and a bit warmer Friday (0.25 in. of rain possible), rain Friday night (0.25 in. of rain possible) and Saturday, rain and snow showers Saturday night.
• lows 35-42 cooling to 37 Saturday night  highs 52-48.
• Cloudy and a bit cooler with rain and snow likely (70%) Sunday and Sunday night,
• Rain and snow showers and a bit warmer Monday, rain and snow showers Monday night,
• Cloudy and a bit warmer with a (40%) chance of rain and snow showers Tuesday, rain and snow showers likely (70%) at night,
• Then cloudy and a bit warmer with a (30%) chance of rain Wednesday.
• highs 45-53 lows 37-42 cooling to 40 Tuesday night. (seasonal averages high 56 low 38)

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

• Partly cloudy this evening, mostly cloudy with patchy fog late tonight,
• Patchy AM fog, mostly cloudy with a slight (20%) chance of rain and a bit cooler Thursday afternoon, a slight (20%) chance of rain late Thursday night (under 0.10 in. of rain possible),
• Cloudy with a (30%) chance of AM rain, coastal rain and a bit warmer in the afternoon while a bit warmer with afternoon inland rain likely (70%) Friday (0.50 in. of rain possible), rain at night and Saturday, then showers Saturday night (0.50 in. of rain possible).
• lows 40-44 cooling back to 40 Saturday night highs 50-48.
• Mostly cloudy and a bit cooler with showers likely (70%) Sunday through Monday (warmer), showers likely (70%) and a bit warmer Monday night through Tuesday night,
• Then cloudy with a good (50%) chance of rain and a bit warmer Wednesday.
• highs 47-53 lows 40-45. (seasonal averages high 54 low 41)

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Forecast for the Cascades in Lane County:

• Partly cloudy tonight,
• A mix of clouds and sun and a bit cooler Thursday, mostly cloudy with a slight (20%) chance of rain and snow in the evening, a (30%) chance of rain and a slight (20%) chance of snow Thursday night,
• Mostly cloudy with AM snow, rain and snow likely (70%) Friday, rain and snow  Friday night,
• Mostly cloudy and a bit warmer with a rain and snow Saturday, then snow showers Saturday night.
• free air freezing level 5,000 ft. rising to 5,500 ft. late tonight, 5,000 ft. Thursday, snow level 4,000 ft. Thursday night and Friday, 4,500 ft. Friday night, 3,500 ft. Saturday, then 2,500 ft. Saturday night,
• lows near 22-28 cooling to 20 Saturday night highs 38-34.
• Mostly cloudy and a bit cooler with snow showers likely (70%) Sunday through Monday, rain and snow showers likely (70%) Monday night,
• Snow likely (70%) and  a bit warmer Tuesday, rain and snow showers likely (70%) at night,
• Cloudy with a good (50%) chance of rain and snow Wednesday.
• snow level at the surface Sunday through Tuesday, 3,500 ft. Tuesday night, then 4,500 ft. Wednesday.
• highs 27-37 lows 22-25.

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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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