Here is my new weekly weather quiz question. What is “Alluvium?”  Please remember to post your answer at the bottom of this page. An email will not suffice. 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 area with blue arrows) is sending more storms our way.  A frontal system will push into the Pacific Northwest as you can see on the days 1,2 & 3 graphic. The graphic for days 3-7 shows the typical parade of storms that bring our Autumn rain. There will be continued snow on the Cascade Passes but snow levels will continue to rise and fall. So far Willamette Pass and Hoodoo ski areas are not open. Mt. Ashland announced Wednesday that they are starting their ski season early- this Sunday December 4th. I’d say they need two good snow storms to produce the approximately 30 inches of snow needed at Willamette Pass and Hoodoo for them to open. Drive carefully! If you need to travel the passes remember to be prepared to chain-up if necessary.

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Air Quality Index:

Eugene-Springfield: The Air Quality Index is 57 in the Moderate category measuring Particulate Matter.

Oakridge: The Air Quality Index is 27 in the Good category measuring Particulate Matter.

Cottage Grove: The Air Quality Index is 56 in the Moderate category measuring Particulate Matter.

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

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Home Wood Heating Advisory:

Eugene-Springfield: YELLOW – Caution is Advised

Oakridge: YELLOW – Caution is Advised

*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 FREEZE WARNING IS IN EFFECT FROM 1 AM UNTIL 9 AM FRIDAY FOR EASTERN CURRY COUNTY, JOSEPHINE COUNTY AND JACKSON COUNTY.
• A Permanent Health Advisory remains 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.
• A Blue-Green Algae Health Advisory remains in effect for Agency Lake. Agency Lake is located just north of Upper Klamath Lake near Klamath Falls along Highway 97 in Klamath County. Water monitoring on the lake has confirmed the presence of high levels of blue-green algae and associated toxins that can be harmful to people and animals. Swallowing water while swimming or inhaling water droplets as a result of high-speed water activities, such as water skiing and power boating, should be avoided in areas where blooms are identified. Although toxins are not absorbed through the skin, contact with cells from a bloom can cause skin irritation and a red, puffy rash in individuals with skin sensitivities, or those who develop rashes easily.

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

• Mostly cloudy with sun breaks and a (40%) chance of scattered showers and a bit cooler this afternoon (under 0.10 in. of rain possible), a slight (20%) chance of showers with patchy fog late,
• Mostly cloudy with areas of AM fog and a slight (20%) chance of rain, a good (50%) chance of rain Friday afternoon (under 0.10 in. of rain possible), cloudy with a good (50%) chance of rain Friday night (under 0.10 in. of rain possible),
• Mostly cloudy with a slight (20%) chance of showers and a bit warmer Saturday, then cloudy with a good (50%) chance of rain Saturday night.
• highs 48-53 lows 36-45 cooling to 43 Saturday night.
• Mostly cloudy with rain and a bit cooler Sunday, evening showers likely (70%), rain and snow showers likely (70%) late Sunday night (snow level 1,000 ft.),
• Cloudy and much cooler with a good (50%) chance of rain and snow showers Monday, a (40%) chance of rain and snow showers at night,
• A mix of clouds and sun and a bit cooler with a slight (20%) chance of snow showers Tuesday, then just mostly cloudy Tuesday night and Wednesday (a bit warmer).
• highs 48-40 warming to 42 Wednesday lows 37-29. (seasonal averages high 48 low 35)

 

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Forecast for Roseburg:

• Mostly cloudy and a bit cooler this afternoon and evening, mostly clear with patchy fog and freezing fog late tonight,
• Mostly cloudy with areas of AM fog, mostly cloudy with a slight (20%) chance of rain Friday afternoon, cloudy with a (40%) chance of rain at night (under 0.10 in. of rain possible),
• Mostly cloudy with a (30%) chance of showers and a bit warmer Saturday and in the evening, then rain late Saturday night.
• highs 47-55 lows 36-43.
• Mostly cloudy with AM rain, rain and snow and a bit cooler Sunday afternoon,evening rain and snow showers likely (70%), rain and snow showers and colder at night and Monday, cloudy with a good (50%) chance of rain and snow showers at night,
• Mostly cloudy and a bit cooler with a (40%) chance of rain and snow showers Tuesday, a slight (20%$) chance of rain and snow showers at night,
• Then mostly cloudy with a slight (20%) chance of rain and snow and a bit warmer Wednesday.
• highs 50-42 warming to 47 Wednesday lows 44-40 warming to 47 Tuesday night. (seasonal averages high 49 low 38)

 

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

• Mostly cloudy and a bit cooler this afternoon and evening, just partly cloudy with patchy fog late tonight,
• Areas of AM fog, mostly cloudy and a bit warmer with a slight (20%) chance of rain Friday afternoon (under 0.10 in. of rain possible), cloudy with coastal rain likely (70%) while a good (50%) chance of inland rain Friday night (0.25 in. of rain possible),
• Mostly cloudy and a bit warmer with a slight (20%) chance of showers Saturday and in the evening, then rain late Saturday night.
• highs 52-56 lows 39-45.
• Mostly cloudy with AM, rain likely (70%) and a bit cooler Sunday afternoon, evening showers likely (70%), then rain and snow showers late Sunday night,
• Rain and snow showers likely (70%) and a bit cooler Monday, cloudy with a (40%) chance of rain and snow showers Monday night and Tuesday (a bit cooler), mostly cloudy with a slight (20%) chance of rain and snow showers at night,
• Then mostly cloudy and a bit warmer with a (30%) chance of rain and snow Wednesday.
• highs 52-48 warming back to 52 Wednesday lows 40-38. (seasonal averages high 52 low 41)

 

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Forecast for the Cascades in Lane County:

• Mostly cloudy with a good (50%) chance of scattered rain and  snow showers and a bit warmer this afternoon (0.10 in. of rain possible), mostly cloudy with a (30%) chance of snow showers and a slight (20%) chance of evening showers (under 0.10 in. of rain possible), just partly cloudy and colder late tonight,
• Mostly cloudy and a bit warmer with a good (50%) chance of rain and snow and a bit warmer Friday afternoon, becoming cloudy with a good (50%) chance of evening rain, rain likely (70%) late Friday night,
• A good (50%) chance of showers Saturday AM, a good (50%) chance of rain and snow Saturday afternoon and at night.
• snow level 3,000 ft. today and tonight, 4,500 ft. Friday afternoon, 6,000 ft. Friday night, 6,500 ft. falling to 4,500 ft. Saturday afternoon, then 4,000 ft. rising to 5,000 ft. late Saturday night.
• highs 32-38 lows 20-33 cooling to 30 Saturday night.
• Mostly cloudy with rain and snow, breezy and a bit cooler Sunday, snow showers likely (70%) at night and Monday, cloudy with a good (50%) chance of snow showers at night,
• Mostly cloudy and a bit cooler with a slight (20%) chance of snow showers Tuesday, just mostly cloudy Tuesday night,
• Then mostly cloudy and a bit warmer with a slight (20%) chance of snow Wednesday.
• snow level 4,500 ft. Sunday, then at the surface Sunday night through Tuesday, free air freezing level at the surface Tuesday night, then snow level at the surface Wednesday.
• highs 34-24 warming to 30 Wednesday lows 22-14.

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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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