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 16 in the Good category measuring Particulate Matter.

Oakridge: The Air Quality Index is 17 in the Good category measuring Particulate Matter.

Cottage Grove: The Air Quality Index is 21 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 2 PM THIS AFTERNOON THROUGH TONIGHT FOR THE NORTHERN OREGON CASCADES.
• A WINTER WEATHER ADVISORY IS IN EFFECT FFOR TONIGHT FOR THE CASCADES IN LANE COUNTY.
• A WINTER STORM WATCH IS IN EFFECT FROM SATURDAY AFTERNOON  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 rain and a bit warmer this afternoon (0.25 in. of rain possible) and evening, showers late tonight (0.25 in. of rain possible),
• Mostly cloudy and a bit cooler with showers Saturday (0.10 in. of rain possible, small hail possible afternoon and evening), showers at night,
• Mostly cloudy and a bit cooler with showers likely (70%) Sunday, cloudy with a good (50%) chance of showers Sunday night (snow level 1,000 ft.).
• highs 52-44 lows 39-33.
• Mostly cloudy and a bit warmer with showers Monday (snow level 1,000 ft.) and Monday night (snow level 1,000 ft.),
• Mostly cloudy with rain Tuesday, rain likely (70%) Tuesday night and Wednesday (a bit warmer), 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 with rain this afternoon (0.25 in. of rain possible) and this evening, rain likely (70%) late tonight (0.50 in. of rain possible, snow level 2,500 ft. late tonight),
• Showers Saturday AM with a good (50%) chance of rain and snow and snow showers, rain and snow showers likely (70%) and a bit cooler Saturday  afternoon (0.25 in. of rain possible, 1 in. of snow possible, snow level 2,000 ft.), evening rain and snow showers, a good (50%) chance of rain and snow showers late Saturday night (snow level 2,000 ft. falling to 1,000 ft. late at night),
• Cloudy with a good (50%) chance of AM rain and snow showers, rain and snow showers and a bit cooler Sunday afternoon, then rain and snow showers likely (70%) Sunday night.
• highs 52-46 lows 40-33.
• Rain and snow showers likely (70%) and a bit warmer Monday, cloudy with a good (50%) chance of rain and snow showers 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 48-56 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:

• Cloudy with a rain this afternoon and breezy (Wind: S 15-25 mph), evening rain, a good (50%) chance of rain late tonight (0.75 in. of rain possible) and breezy (Wind: SW 15-25 mph decreasing to SW 10-15 mph late tonight),
• Mostly cloudy with a good (50%) chance of AM coastal showers with showers Saturday afternoon while a good (50%) chance of AM inland rain and snow showers and inland rain and snow showers and a bit cooler Saturday afternoon (0.25 in. of rain possible, snow level 1,500 ft. rising to 2,000 ft. in the afternoon) an breezy (Wind: SW 15-25 mph), coastal showers with a slight (20%) chance of thunderstorms in the evening and showers likely (70%) with a slight (20%) chance of thunderstorms late at night while inland evening showers with a good (50%) chance of inland showers and snow showers and a slight (20%) chance of thunderstorms late Saturday night (snow level 2,000 ft. falling to 1,000 ft. late at night),
• Mostly cloudy and a bit cooler with coastal showers and a slight (20%) chance of thunderstorms while rain and snow showers inland Sunday (snow level 1,000 ft.), then rain and snow showers Sunday night.
• highs 52-46 lows 42-38.
• Mostly cloudy with rain and snow showers likely (70%) and a bit warmer Monday, cloudy with a good (50%) chance of showers Monday night,
• Showers likely (70%) Tuesday, showers at night,
• Mostly cloudy with rain likely (70%) and a bit warmer Wednesday and at night,
• Then mostly cloudy with a good (50%) chance of rain Thursday.
• highs 48-54 lows 43-46. (seasonal averages high 54 low 41)

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Forecast for the Cascades in Lane County:

• Mostly cloudy with rain and snow and a bit warmer this afternoon (0.25 in. of rain possible, 1-3 in. of snow possible), rain and snow in the evening, showers late tonight (0.50 in. of rain possible, 4-8 in. of snow possible),
• Cloudy with showers and a bit cooler Saturday (3-6 in. of snow possible), then snow showers and a bit cooler Saturday night through Sunday night.
• snow level 5,000 ft. today, 4,500 ft. falling to 3,000 ft. late tonight, 3,000 ft. Saturday, then at the surface Saturday night through Sunday night.
• highs 38-28 lows near 28-18.
• Mostly cloudy and a bit warmer with snow showers Monday and Monday night,
• Cloudy with snow Tuesday, rain or snow likely (70%) at night,
• Mostly cloudy and a bit warmer with a good (50%) chance of rain and snow 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 and Monday night, 2,500 ft. Tuesday, 4,500 ft. Tuesday night, 5,500 ft. Wednesday, 6,500 ft. Wednesday night, then 8,000 ft. Thursday.
• highs 30-40 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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