Here is my weekly weather quiz question. What is “Accretion?” Pease 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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Short-lived high pressure (Shaded “Arch” shape with blue arrows) cleared the sky enough for a very cold night. An upper level low pressure trough (Shaded “U” shape area with blue arrows) moves in behind the ridge returning the clouds, freezing precipitation, rain and snow. The graphic for days 3-7 shows a couple more fronts that will visit the Pacific Northwest bringing more precipitation our way. Willamette Pass Ski, Hoodoo ski area, and Mt. Ashland are all open for the 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 37 in the Good category measuring Particulate Matter.

Oakridge: The Air Quality Index is 37 in the Good category measuring Particulate Matter.

Cottage Grove: The Air Quality Index is 23 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 WINTER STORM WATCH IS IN EFFECT FROM LATE TONIGHT THROUGH THURSDAY AFTERNOON FOR THE COAST RANGE OF NORTHWEST OREGON, THE GREATER PORTLAND METRO AREA, AND THE NORTHERN OREGON CASCADE FOOTHILLS,THE SOUTH CENTRAL OREGON CASCADES, THE SOUTHERN OREGON CASCADES, AND THE SISKIYOU MOUNTAINS, THE KLAMATH BASIN, NORTHERN AND EASTERN KLAMATH COUNTY, AND CENTRAL, EASTERN, AND WESTERN LAKE COUNTY.
• A WIND ADVISORY IS IN EFFECT FROM 3 PM TODAY UNTIL 4 PM THURSDAY FOR THE GREATER PORTLAND METRO AREA.
• A WINTER STORM WATCH IS IN EFFECT FROM THIS EVENING THROUGH THURSDAY MORNING FOR THE CENTRAL COAST RANGE OF WESTERN OREGON, THE LOWER COLUMBIA, THE CASCADE FOOTHILLS IN LANE COUNTY.
• A WINTER STORM WATCH IS IN EFFECT  FROM LATE TONIGHT THROUGH THURSDAY MORNING FOR THE CENTRAL WILLAMETTE VALLEY, THE SOUTH WILLAMETTE VALLEY.
• A WINTER STORM WATCH IS IN EFFECT FROM LATE TONIGHT THROUGH LATE THURSDAY NIGHT FOR THE WESTERN COLUMBIA GORGE, THE CENTRAL COLUMBIA RIVER GORGE, AND THE UPPER HOOD RIVER VALLEY.
• A FROST ADVISORY IS IN EFFECT UNTIL 8 AM TODAY FOR THE SOUTH CENTRAL OREGON COAST, THE CURRY COUNTY COAST, EASTERN CURRY COUNTY, AND JOSEPHINE COUNTY.
• A WINTER STORM WATCH IS IN EFFECT FROM THIS EVENING THROUGH THURSDAY MORNING FOR CENTRAL DOUGLAS COUNTY, EASTERN CURRY COUNTY, AND JOSEPHINE COUNTY, THE EASTERN DOUGLAS COUNTY FOOTHILLS, JACKSON COUNTY.
• A WINTER STORM WATCH IS IN EFFECT FROM THURSDAY AFTERNOON THROUGH LATE THURSDAY NIGHT FOR NORTHERN AND EASTERN KLAMATH COUNTY, WESTERN, CENTRAL, AND EASTERN LAKE COUNTY.
• A HIGH WIND WATCH IS IN EFFECT FROM THURSDAY AFTERNOON THROUGH LATE THURSDAY NIGHT FOR NORTHERN AND EASTERN KLAMATH COUNTY, WESTERN, CENTRAL, AND EASTERN LAKE COUNTY.
• 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.
• 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:

• A mix of clouds and sun and cold with areas of freezing fog this AM, clouds and sun and a bit cooler this afternoon, increasing clouds to cloudy with rain, freezing rain, sleet and snow late tonight (0.25 in. of rain possible, 1 in. of snow possible),
• AM rain, freezing rain, and sleet Thursday, rain and a bit warmer in the afternoon and evening (0.50 in. of rain possible), showers late Thursday night (0.10 in. of rain possible) and Friday, then showers likely (70%) Friday night.
• highs 36-47 lows 32-43 cooling to 39 Friday night.
• Mostly cloudy with showers likely (70%) and a bit cooler Saturday and Saturday night,
• Then showers likely (70%) and a bit cooler Sunday through Tuesday.
• highs 46-42 lows 38-40 cooling to 35 Monday night. (seasonal averages high 46 low 34)

 

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Forecast for Roseburg:

• Sunny with AM fog and freezing fog, increasing clouds to mostly cloudy with a (30%) chance of rain and snow and a bit cooler this afternoon (under 0.10 in. of rain possible), cloudy with rain, snow and a slight (20%) chance of freezing rain this evening, rain and a slight (20%) chance of light freezing rain late tonight (0.15 in. of rain possible, 1 in. of snow possible, evening snow level 900 ft. rising to 3,000 ft. late tonight),
• Mostly cloudy with rain and a bit warmer Thursday (0.25 in. of rain possible), evening rain likely (70%), rain late Thursday night (0.25 in. of rain possible, snow level 3,500 ft. late at night),
• Mostly cloudy and a bit cooler with showers Friday and Friday night.
• highs 38-49 cooling to 46 Friday lows 38-43 cooling to 40 Friday night.
• Mostly cloudy and a bit cooler with rain and snow showers Saturday, evening rain likely (70%), rain and snow likely (70%) late Saturday night and Sunday, mostly cloudy with a (40%) chance of showers Sunday night,
• Showers likely (70%) and a bit warmer Monday, then mostly cloudy with a good (50%) chance of showers Monday night and Tuesday.
• highs 45-47 lows 37-40 cooling to 36 Monday night. (seasonal averages high 48 low 37)

 

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

• Sunny with areas of AM fog and freezing fog, increasing clouds to mostly cloudy and a bit warmer with a slight (20%) chance of coastal rain this afternoon while a slight (20%) chance of inland AM rain and a slight (20%) chance of inland rain and snow this afternoon (under 0.10 in. of rain possible), rain tonight (0.15 in. of rain possible, evening snow level 1,500 ft.) and breezy (Wind: SE 10-15 mph increasing to SE 15-25 mph late tonight),
• Mostly cloudy with rain and a bit warmer Thursday (0.25 in. of rain possible) and breezy (Wind: S 20-30 mph gusts to 40 mph at the shore while S 10-20 mph gusts to 40 mph inland), coastal rain Thursday night while inland rain likely (70%) and breezy (Wind: SW 15-25 mph with evening gusts to 40 mph) at night (0.25 in. of rain possible).
• Mostly cloudy with showers and a bit cooler Friday and Friday night.
• highs 48-54 warming back to 48 Friday lows 40-49 cooling to 45 Friday night.
• Showers and a bit cooler Saturday, rain likely (70%) Saturday night and Sunday (a bit warmer), mostly cloudy with a good (50%) chance of showers Sunday night,
• Mostly cloudy and a bit cooler with showers likely (70%) Monday, then mostly cloudy with a good (50%) chance of showers Monday night and Tuesday (a bit cooler).
• highs 49-52 cooling back to 49 Tuesday lows 44-46 cooling to 40 Monday night. (seasonal averages high 51 low 40)

 

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Forecast for the Cascades in Lane County:

• Sunny this AM, partly cloudy and a bit warmer this afternoon, becoming mostly cloudy with a slight (20%) chance of evening snow, snow and rain late tonight (0.25 in. of rain possible, 1-3 in. of snow possible),
• Snow, rain, and a (40%)  chance of freezing rain, rain and snow and a bit warmer Thursday afternoon, evening rain and snow, rain and snow showers late Thursday night,
• Then rain and snow showers and a bit cooler Friday and Friday night.
• free air freezing level at the surface today, snow level at the surface tonight, 4,000 ft. rising to 5,500 ft. Thursday afternoon, 4,500 ft. Thursday night, then 3,000 ft. Friday and Friday night.
• highs 27-37 cooling to 30 Friday lows 22-33 cooling to 25 Friday night.
• Cloudy and a bit cooler with snow showers Saturday, mostly cloudy with snow showers likely (70%) Saturday night and Sunday, snow showers at night,
• Then mostly cloudy and a bit warmer with snow showers also showers likely (70%) Monday, then snow showers likely (70%) Monday night and Tuesday (a bit cooler).
• snow level 2,500 ft. tonight through Sunday, at the surface Sunday night, 3,000 ft. Monday, at the surface Monday night, then 2,500 ft. Tuesday.
• highs 29-35 cooling to 25 Tuesday lows 20-25.

 

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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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