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) is being replaced by an upper level low pressure trough (Shaded “U” shape with blue arrows). The graphic for days 1-3 shows the front moving toward Oregon. The graphic for days 3-7 shows a frontal system headed for us middle to late next week. 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 9 in the Good category measuring Particulate Matter.

Oakridge: The Air Quality Index is 15 in the Good category measuring Particulate Matter.

Cottage Grove: The Air Quality Index is 3 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 FROM LATE FRIDAY AFTERNOON THROUGH FRIDAY NIGHT FOR THE NORTHERN OREGON CASCADES.
• A WINTER WEATHER ADVISORY IS IN EFFECT FOR FRIDAY NIGHT FOR THE CASCADES IN LANE COUNTY.
• A WINTER STORM WATCH IS IN EFFECT FROM FRIDAY EVENING THROUGH LATE SUNDAY NIGHT FOR THE SOUTH CENTRAL OREGON CASCADES, THE SOUTHERN OREGON CASCADES , AND THE SISKIYOU MOUNTAINS.
• 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 occasional evening sprinkles, a (30%) chance of rain late tonight (under 0.10 in. of rain possible),
• Cloudy with a good (50%) chance of AM rain, rain and a bit warmer Friday afternoon (0.50 in. of rain possible) and evening, showers late Friday night (0.50 in. of rain possible),
• Mostly cloudy and a bit cooler with showers Saturday (0.10 in. of rain possible) and at night,
• Mostly cloudy and a bit cooler with showers likely (70%) Sunday and Sunday night.
• lows 40-33 highs 52-44.
• Mostly cloudy and a bit warmer with showers Monday and Monday night,
• Showers and a bit warmer Tuesday, showers likely (70%) at night,
• Mostly cloudy with rain likely (70%) and a bit warmer Wednesday, cloudy with a good (50%) chance of rain Wednesday night,
• Then cloudy with rain likely (70%) Thursday.
• highs 46-53 lows near 40. (seasonal averages high 54 low 36)

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Forecast for Roseburg:

• Mostly cloudy tonight,
• Mostly cloudy with a slight (20%) chance of AM rain, rain Friday afternoon (0.25 in. of rain possible) and at night (0.50 in. of rain possible, snow level 3,000 ft. late at night),
• Showers Saturday AM, rain and snow and a bit cooler Saturday  afternoon (0.25 in. of rain possible, snow level 2,500 ft. falling to 2,000 ft. in the afternoon), rain and snow showers Saturday night (snow level 2,000 ft.),
• Cloudy with AM rain and snow showers likely (70%), rain and snow showers and a bit cooler Sunday afternoon, then rain and snow showers Sunday night.
• lows 40-35 highs 53-44.
• Rain and snow showers and a bit warmer Monday, rain and snow showers likely (70%) Monday night,
• Cloudy and a bit warmer with a good (50%) chance of showers Tuesday and at night,
• Then cloudy and a bit warmer with a (30%) chance of rain Wednesday through Thursday.
• highs 46-56 lows 37-40. (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 a slight (20%) chance of coastal rain late tonight (under 0.10 in. of rain possible),
• Cloudy with a (30%) chance of rain Friday AM, coastal rain in the afternoon and Friday night (0.75 in. of rain possible),
• Mostly cloudy and a bit cooler with showers Saturday (0.25 in. of rain possible, snow level 2,000 ft.), coastal showers with a slight (20%) chance of thunderstorms at night while inland evening showers with inland showers and snow showers and a slight (20%) chance of thunderstorms late Saturday night (snow level 2,000 ft. falling to 1,500 ft. late at night),
• Mostly cloudy and a bit cooler with showers and snow showers and a slight (20%) chance of thunderstorms Sunday, then rain and snow showers Sunday night.
• lows 45-38 highs 52-46.
• Mostly cloudy with rain and snow showers and a bit warmer Monday, showers Monday night through Tuesday night,
• Mostly cloudy with rain likely (70%) and a bit warmer Wednesday and Wednesday night,
• Then mostly cloudy with a good (50%) chance of rain Thursday.
• highs 47-54 lows 33-46. (seasonal averages high 54 low 41)

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Forecast for the Cascades in Lane County:

• Mostly cloudy tonight,
• Mostly cloudy with a slight (20%) chance of AM rain, rain and snow likely (70%) and a bit warmer Friday afternoon (0.25 in. of rain possible, 1-3 in. of snow possible), rain and snow in the evening, showers late Friday night (0.75 in. of rain possible, 5-8 in. of snow possible),
• Cloudy with showers and a bit cooler Saturday, then snow showers and a bit cooler Saturday night through Sunday night.
• free air freezing level 6,000 ft. tonight, snow level 5,500 ft. Friday, 5,000 ft. falling to 3,500 ft. late Friday night, 3,000 ft. Saturday, then at the surface Saturday night through Sunday night.
• lows near 26-28 cooling to 17 Sunday night highs 38-28.
• Mostly cloudy and a bit warmer with snow showers Monday and through Tuesday, showers likely (70%) at night,
• Mostly cloudy and a bit warmer with a good (50%) chance of rain Wednesday, cloudy with a good (50%) chance of rain Wednesday night,
• Then rain likely (70%) and a bit warmer Thursday.
• snow level at the surface Monday, 2,500 ft. Monday night, 3,000 ft. Tuesday, 4,500 ft. Tuesday night, 5,500 ft. Wednesday, 6,500 ft. Wednesday night, then 8,000 ft. Thursday.
• highs 28-37 lows 24-26.

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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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