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 Low Pressure Trough (Shaded “U” shape with blue arrows) is swinging through the Pacific Northwest spreading moisture and cool air over the area. The graphic for days 1-3 shows the storm moving through. The graphic for days 3-7 shows frontal movement continuing through next Monday. 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 6 in the Good category measuring Particulate Matter.

Oakridge: The Air Quality Index is 11 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 WINTER WEATHER ADVISORY IS IN EFFECT UNTIL 10 PM TONIGHT FOR THE NORTHERN OREGON CASCADE FOOTHILLS, THE CASCADE FOOTHILLS IN LANE COUNTY,  AND THE NORTHERN OREGON CASCADES.
• A WINTER WEATHER ADVISORY IS IN EFFECT UNTIL 10 AM TUESDAY FOR THE EASTERN DOUGLAS COUNTY FOOTHILLS.
• 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 a good (50%) chance of scattered showers tonight (0.10 in. of rain possible),
• Mostly cloudy and a bit warmer with a good (50%) chance of showers Tuesday (0.10 in. of rain possible), a slight (20%) chance of showers Tuesday night (under 0.10 in. of rain possible),
• Mostly cloudy with a good (50%) chance of showers and a bit warmer Wednesday (under 0.10 in. of rain possible), just mostly cloudy at night,
• Mostly cloudy with a (40%) chance of rain Thursday, then a good (50%) chance of rain Thursday night.
• lows 36-40 cooling back to 36 Wednesday night warming to 40 Thursday night highs 48-50 cooling back to 48 Thursday.
• Mostly cloudy with rain and a bit warmer Friday and Friday night,
• Mostly cloudy and a bit cooler with rain likely (70%) Saturday, rain at night,
• Showers likely (70%) Sunday, a (40%) chance of showers Sunday night,
• Then rain and snow likely (70%) Monday (snow level 1,000 ft.).
• highs 50-47 lows 42-38. (seasonal averages high 53 low 36)

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Forecast for Roseburg:

• Cloudy with rain and snow showers likely (70%) tonight (0.10 in. of rain possible, 1-2 in. of snow possible, snow level 2,000 ft. falling to 1,500 ft.),
• Cloudy and a bit warmer with a (40%) chance of rain and snow showers Tuesday (0.10 in. of rain possible, snow level 1,500 ft. rising to 2,500 ft. in the afternoon), mostly cloudy with a slight (20%) chance of showers at night (under 0.10 in. of rain possible),
• Mostly cloudy with a slight (20%) chance of AM showers, partly cloudy and a bit warmer with a slight (20%) chance of showers Wednesday afternoon, just partly cloudy in the evening, mostly cloudy with patchy fog and freezing fog late Wednesday night and Thursday AM, a bit cooler with a slight (20%) chance of showers in the afternoon, then a slight (20%) chance of rain late at night.
• lows near 36 highs 48-52.
• Mostly cloudy with rain and a bit cooler Friday through Saturday night,
• Cloudy with rain and snow showers likely (70%) Sunday, mostly cloudy with a (30%) chance of rain and snow showers at night,
• Then mostly cloudy and a bit warmer with rain likely (60%) Monday.
• highs 50-52 lows 42-38 warming back to 42  Sunday night. (seasonal averages high 56 low 38)

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

• Mostly cloudy with coastal showers this evening and showers likely (70%) late tonight while inland showers likely (70%) tonight (0.25 in. of rain possible, evening snow level 2,000 ft. ),
• Cloudy with coastal showers likely (70%) and a bit warmer while a (40%) chance of inland showers Tuesday (0.10 in. of rain possible, AM snow level 2,000 ft.), mostly cloudy with a slight (20%) chance of showers Tuesday night (under 0.10 in. of rain possible),
• Mostly cloudy and a bit warmer with a (30%) chance of coastal showers while a slight (20%) chance of inland showers Wednesday (under 0.10 in. of rain possible), just partly cloudy in the evening, mostly cloudy with patchy fog late at night,
• Mostly cloudy with patchy AM fog, a slight (20%) chance of showers Thursday afternoon, then a slight (20%) chance of rain late Thursday night.
• lows 42-45 highs 50-52.
• Mostly cloudy and a bit warmer with rain Friday through Saturday night,
• A bit warmer with rain and snow likely (70%) Sunday, a good (50%) chance of showers at night,
• Then mostly cloudy with rain likely (70%) Monday.
• highs 52-50 warming back to 52 Sunday lows 45-42 warming to 46 Monday. (seasonal averages high 54 low 41)

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Forecast for the Cascades in Lane County:

• Mostly cloudy with snow showers tonight (3-6 in. of snow possible),
• Mostly cloudy snow showers likely (70%) and a bit warmer Tuesday (1-3 in. of snow possible), a good (50%) chance of snow showers Tuesday night,
• A mix of clouds and sun with a good (50%) chance of AM snow showers, a slight (20%) chance of snow showers and a bit warmer Wednesday afternoon, just partly cloudy at night,
• A mix of clouds and sun and a bit cooler with a slight (20%) chance of snow Thursday, then mostly cloudy with a (40%) chance of rain and snow Thursday night.
• snow level at the surface tonight and Tuesday, 2,500 ft. Tuesday night and Wednesday, free air freezing level 4,000 ft. Wednesday night, snow level 3,000 ft. Thursday, then 3,500 ft. Thursday night.
• lows near 22-20 warming to 24 Thursday highs 30-37 cooling to 35 Thursday.
• Mostly cloudy and a bit warmer with a rain and snow Friday through Saturday night,
• Mostly cloudy and a bit cooler snow showers likely (70%) Sunday, a good (50%) chance of snow showers at night,
• Then snow likely (70%) and a bit warmer Monday.
• snow level 4,000 ft. Friday and Friday night, 3,500 ft. Saturday, 3,000 ft. Saturday night, 2,5900 ft. Sunday, the at the surface Sunday night and Monday.
• highs 36-32 warming back to 36 Monday lows 28-24.

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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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