Here is my weekly weather quiz question for the last time. What is “Alluvium?” Here is the correct answer. Alluvium: Sediments deposited by erosional processes, usually by streams. I’ll have a new weekly weather quiz question for you starting Monday. 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 pushes into the Pacific Northwest as you can see on the days 1,2 & 3 graphic bringing colder air and the potential for snow, little or none expected on the valley floor. The graphic for days 3-7 shows the typical parade of Winter-like storms that bring rain and snow. There will be continued snow on the Cascade Passes but snow levels will continue to rise and fall. Willamette Pass, Hoodoo ski area, and Mt. Ashland have all started their ski season. 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 10 in the Good category measuring Particulate Matter.

Oakridge: The Air Quality Index is 16 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: 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 STORM WARNING IS IN EFFECT FROM 7 PM THIS EVENING THROUGH 10 AM TUESDAY ABOVE 2,000 FT. FOR THE SOUTH CENTRAL OREGON COAST, CENTRAL DOUGLAS COUNTY, EASTERN CURRY COUNTY, AND JOSEPHINE COUNTY.
• A WINTER WEATHER ADVISORY IS IN EFFECT THROUGH 10 AM TUESDAY FOR THE SOUTH CENTRAL OREGON COAST, CENTRAL DOUGLAS COUNTY, EASTERN CURRY COUNTY, JOSEPHINE COUNTY, THE KLAMATH BASIN, NORTHERN AND EASTERN KLAMATH COUNTY, AND WESTERN LAKE COUNTY.
• A WINTER STORM WARNING IS IN EFFECT UNTIL 10 AM TUESDAY FOR THE EASTERN DOUGLAS COUNTY FOOTHILLS, THE SOUTH CENTRAL OREGON CASCADES, THE SOUTHERN OREGON CASCADES, AND THE SISKIYOU MOUNTAINS.
• A WINTER STORM WARNING IS IN EFFECT FROM 10 PM TONIGHT UNTIL 10 AM TUESDAY FOR JACKSON COUNTY, NORTHERN AND EASTERN KLAMATH COUNTY, WESTERN, CENTRAL AND EASTERN LAKE COUNTY.
• A WINTER WEATHER ADVISORY IS IN EFFECT UNTIL 10 AM TUESDAY ABOVE 1,500 FT. FOR JACKSON COUNTY.
• A WINTER WEATHER ADVISORY IS IN EFFECT UNTIL 10 AM TUESDAY FOR THE EASTERN DOUGLAS COUNTY FOOTHILLS, THE SOUTH CENTRAL CASCADES, THE SOUTHERN OREGON CASCADES, AND THE SISKIYOU MOUNTAINS.
• A WINTER WEATHER ADVISORY IS IN EFFECT FROM 7 PM TONIGHT UNTIL 10 AM TUESDAY FOR THE SOUTH CENTRAL COAST OF OREGON, CENTRAL DOUGLAS COUNTY, EASTERN CURRY COUNTY, JOSEPHINE COUNTY, THE KLAMATH BASIN, NORTHERN AND EASTERN KLAMATH COUNTY, AND WESTERN LAKE COUNTY.
• A WINTER WEATHER ADVISORY IS IN EFFECT UNTIL 3 AM TUESDAY FOR THE COAST RANGE OF NORTHWESTERN OREGON AND THE NORTHERN CASCADES.
• A WINTER WEATHER ADVISORY IS IN EFFECT UNTIL 1 AM TUESDAY ABOVE 700 FT. FOR THE GREATER PORTLAND METRO AREA.
• A WINTER WEATHER ADVISORY IS IN EFFECT UNTIL 9 PM TONIGHT FOR THE CENTRAL WILLAMETTE VALLEY, THE WESTERN COLUMBIA RIVER GORGE, THE CENTRAL COLUMBIA RIVER GORGE, AND THE UPPER HOOD RIVER VALLEY.
• A WINTER WEATHER ADVISORY IS IN EFFECT UNTIL 6 AM TUESDAY FOR THE CENTRAL COAST RANGE OF WESTERN OREGON, NORTHERN OREGON CASCADE FOOTHILLS,  THE CASCADE FOOTHILLS IN LANE COUNTY, AND THE CASCADES IN LANE COUNTY.
• A WINTER WEATHER ADVISORY IS IN EFFECT UNTIL 4 PM TODAY FOR THE NORTHERN OREGON CASCADES AND THE CASCADES IN LANE 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 rain and snow showers tonight (0.25 in. of rain possible, under 1 in. of snow possible, snow level 1,000 ft.),
• Mostly cloudy with a good (50%) chance of AM rain and snow showers, a bit cooler Tuesday with a slight (20%) chance of rain and snow showers in the afternoon (0.10 in. of rain possible), partly cloudy and cold with patchy freezing fog late Tuesday night and Wednesday AM, just partly cloudy and a bit cooler in the afternoon, increasing clouds to cloudy with a good (50%) chance of evening snow and rain, rain and snow likely (70%) late Wednesday night,
• Cloudy with rain and freezing rain Thursday AM, rain and a bit warmer in the afternoon (0.10 in. of rain possible), then rain likely (70%) Thursday night.
• lows 32-23 warming to 43 Thursday night highs 39-36 warming to 46 Thursday.
• Mostly cloudy with rain likely (70%) Friday, showers likely (70%) Friday night and Saturday, mostly cloudy with a good (50%) chance of showers Saturday night,
• Showers likely (70%) Sunday and Sunday night,
• Then mostly cloudy with a good (50%) chance of showers Monday.
• highs 46-44 lows 39-36. (seasonal averages high 47 low 35)

 

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Forecast for Roseburg:

• Cloudy with rain and snow showers tonight (0.25 in. of rain possible, 1-2 in. of snow possible lower elevations while 3-4 in. of snow possible above 1,500 ft., snow level 1,5000 ft. falling to 900 ft.),
• Mostly cloudy with rain and snow showers Tuesday AM, a good (50% ) chance of rain and snow showers and a bit cooler in the afternoon (0.15 in. of rain possible, 1 in. of snow possible in lower elevations, 1-2 in. of snow possible above 1,500 ft. snow level 600 ft.), partly cloudy with patchy fog and freezing fog late Tuesday night and Wednesday AM, mostly cloudy with a (30%) chance of rain and snow and a bit cooler Wednesday afternoon (under 0.10 in. of rain possible, snow level 1,500 ft.), rain and a slight (20%) chance of freezing rain in the evening, cloudy with a (40%) chance of rain and a slight (20%) chance of light freezing rain late Wednesday night (0.15 in. of rain possible, evening snow level 2,000 ft.),
• Mostly cloudy with rain likely (70%) a bit warmer Thursday, then rain Thursday night.
• lows 34-24 warming to 42 Thursday night highs 40-52.
• Mostly cloudy and a bit cooler with rain Friday, showers and colder Friday night,
• Cloudy and a bit cooler with rain and snow showers likely (70%) Saturday, a (40%) chance of rain and snow Saturday night and Sunday, then mostly cloudy with a (40%) chance of rain and snow showers Sunday night and Monday.
• highs 49-46 lows 40-38. (seasonal averages high 48 low 37)

 

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

• Mostly cloudy with coastal showers this evening and rain and snow showers late tonight while inland rain and snow showers tonight (0.25 in. of rain possible, 1 in. of snow possible, snow level 2,000 ft. falling to 1,000 ft. late) tonight,
• Mostly cloudy with rain and snow showers Tuesday AM,a good (50%) chance of coastal showers in the afternoon while inland rain and snow showers likely (60%) in the afternoon (0.10 in. of rain possible, little or no snow accumulation, snow level 800 ft. rising to 1,500 ft.), mostly clear in the evening, partly cloudy with patchy fog and freezing fog late Tuesday night,
• Partly cloudy with areas of AM fog and freezing fog, a slight (20%) chance of rain Wednesday afternoon (under 0.10 in. of rain possible, afternoon snow level 1,500 ft.), cloudy with a good (50%) chance of evening rain, coastal rain at night while inland rain likely (70%) Wednesday night (0.25 in. of rain possible),
• Mostly cloudy with AM rain likely (70%), then rain and a bit warmer Thursday afternoon and Thursday night.
• lows 42-32 warming to 47 Thursday night highs 47-55.
• Mostly cloudy with rain and a bit cooler Friday, showers Friday night,
• Showers likely (70%) and a bit cooler Saturday, cloudy with a good (50%) chance of rain at night,
• Cloudy and a bit cooler with a good (50%) chance of rain Sunday, then mostly cloudy with a good (50%) chance of showers Sunday night and Monday.
• highs 55-50 lows 46-40. (seasonal averages high 51 low 40)

 

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Forecast for the Cascades in Lane County:

• Cloudy with snow showers and cold tonight (4-6 in. of snow possible),
• Mostly cloudy with snow showers likely (60%) Tuesday AM, partly cloudy with a slight (20%) chance of snow showers and a bit cooler in the afternoon (1-2 in. of snow possible), just mostly clear and cold at night,
• Partly cloudy and a bit warmer Wednesday, becoming cloudy with a good (50%) chance of evening snow, snow and freezing rain likely (70%) and cold Wednesday night,
• Rain with a mix of freezing rain and snow Thursday AM, rain and snow and a bit warmer in the afternoon, then rain and snow Thursday night.
• snow level at the surface tonight and Tuesday, free air freezing level at the surface Tuesday night and Wednesday, snow level 3,000 ft. Wednesday night, 5,000 ft. Thursday, then 4,000 ft. Thursday night
• lows 19-12 warming to 30 Thursday night highs 25-37.
• Snow and rain and a bit cooler Friday, rain and snow showers Friday night,
• Cloudy with snow showers Saturday, mostly cloudy with a good (50%) chance of rain and snow showers at night and Sunday, then mostly cloudy with snow showers likely (70%) Sunday night and Monday (a bit cooler).
• snow level 3,500 ft. Friday, 3,000 ft. Friday night, then at the surface Saturday through Monday.
• highs 30-28 lows 30-28.

 

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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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