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 Friday as you can see on the days 1,2 & 3 graphic with the warm front first followed by a cold front. 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. Willamette Pass has indicated they are open starting today. Hoodoo ski area plans to open Saturday December 3rd. Mt. Ashland announced Wednesday that they are starting their ski season early- this Sunday December 4th. It looks like the ski season has a good chance of starting reasonably early this year. For mountain snow conditions check out their websites or give them a call.

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Air Quality Index:

Eugene-Springfield: The Air Quality Index is 8 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 15 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: 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 a slight (20%) chance of showers this evening, a slight (20%) chance of rain with patchy fog late tonight (under 0.10 in. of rain possible),
• Cloudy with areas of AM fog and a (40%) chance of rain, rain likely (70%) Friday afternoon (under 0.10 in. of rain possible) and evening,  a good (50%) chance of rain Friday night (under 0.10 in. of rain possible),
• Cloudy with a slight (20%) chance of showers and a bit warmer Saturday (under 0.10 in. of rain possible), a slight (20%) chance of showers, rain likely (70%) Saturday night (0.10 in. of rain possible),
• Mostly cloudy with rain in the AM, showers and a bit cooler Sunday afternoon, then showers likely (70%) Sunday night.
• lows 37-45 cooling to 36 Sunday night highs 48-52 cooling back to 48 Sunday.
• Cloudy and much cooler with rain and snow showers likely (70%) Monday (snow level 1,000 ft.), a good (50%) chance of rain and snow showers at night,
• A mix of clouds and sun and a bit cooler with a slight (20%) chance of rain and snow showers Tuesday and Tuesday night,
• A (40%) chance of snow and rain and a bit warmer Wednesday, then mostly cloudy with rain likely (70%) Wednesday night and Thursday (a bit warmer).
• highs 40-45 lows 32-29 warming to 40 Tuesday night. (seasonal averages high 47 low 35)

 

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Forecast for Roseburg:

• Mostly cloudy and cooler this evening, patchy fog and freezing fog late tonight and Friday AM, mostly cloudy and a bit cooler with a slight (20%) chance of rain in the afternoon, cloudy with a (30%) chance of rain at night (under 0.10 in. of rain possible),
• Mostly cloudy with a slight (20%) chance of rain and a bit warmer Saturday, a good (50%) chance of rain Saturday night,
• Cloudy with rain and a bit cooler Sunday, then rain and snow showers likely (70%) and colder at night.
• lows 36-43 warming to 45 Saturday cooling to 49 Sunday highs 47-55 cooling to 49 Sunday.
• Mostly cloudy with rain and snow showers and a bit cooler Monday, rain and snow showers likely (70%) at night,
• Mostly cloudy with a (30%) chance of AM rain and snow, a bit cooler with a (40%) chance of rain and snow showers Tuesday, a slight (20%) chance of rain and snow showers at night,
• A (40%) chance of rain and snow Wednesday AM, a (30%) chance of rain and a bit warmer Wednesday afternoon, evening rain and snow likely (70%), then rain likely (70%) late Wednesday night and Thursday (a bit warmer).
• highs 44-40 warming to 49 Thursday lows 44-40 warming to 49 Wednesday night. (seasonal averages high 49 low 38)

 

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

• Partly cloudy this evening, just mostly 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 evening coastal rain likely (70%) and a good (50%) chance of coastal rain late while a good (50%) chance of inland rain Friday night (under 0.10 in. of rain possible),
• Mostly cloudy and a bit warmer with a slight (20%) chance of rain Saturday (under 0.10 in. of rain possible), a slight (20%) chance of evening coastal rain and coastal rain likely (70%) late at night while a good (50%) chance of inland rain Saturday night (under 0.10 in. of rain possible),
• Mostly cloudy with rain and a bit cooler Sunday, evening showers likely (70%), then rain and snow showers likely (70%) late Sunday night.
• lows 40-46 cooling to 40 Sunday night highs 55-52.
• Mostly cloudy with rain and snow showers and a bit cooler Monday, showers Monday night,
• A (40%) chance of AM rain Tuesday, a bit cooler with a (30%) chance of afternoon showers, a slight (20%) chance of evening showers, a slight (20%) chance of rain and snow showers Tuesday night,
• Mostly cloudy and a bit warmer with a (30%) chance of AM rain, a good (50%) chance of rain Wednesday afternoon, rain likely (70%) at night,
• Then cloudy and a bit warmer with rain Thursday.
• highs 49-55 lows 38-47. (seasonal averages high 52 low 40)

 

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Forecast for the Cascades in Lane County:

• Mostly cloudy with a (40%) chance of snow showers and a slight (20%) chance of showers this evening  (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 Friday afternoon, evening rain likely (70%), rain and snow likely (70%) late Friday night,
• A good (40%) chance of rain and snow showers Saturday, cloudy with a good (50%) chance of rain and snow at night,
• Mostly cloudy with rain and snow and a bit cooler Sunday, then snow showers likely (70%) Sunday night.
• snow level 3,000 ft. tonight, 4,500 ft. Friday afternoon, 6,000 ft. Friday night, 6,000 ft. falling to 4,500 ft. Saturday afternoon, 4,500 ft. Saturday night, 5,500 ft. falling to 3,000 ft. Sunday, then at the surface Sunday night.
• lows 20-34 cooling back to 20 Sunday night highs 35-38 cooling back to 35 Sunday night.
• Mostly cloudy with snow showers Monday, cloudy with a good (50%) chance of snow showers at night,
• Mostly cloudy and a bit cooler with a (30%) chance of snow showers Tuesday, a slight (20%) chance of snow showers Tuesday night,
• A bit warmer with a (40%) chance of snow Wednesday, snow likely (70%) at night,
• Then snow and rain likely (70%) Thursday.
• snow level at the surface Monday through Wednesday night, then 3,000 ft. Thursday.
• highs 26-24 warming to 33 Thursday lows 14-27.

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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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