Here is my weekly weather quiz question for the last time. What is “Accretion?” Here is the correct answer. Accretion is the growth of a precipitation particle by the collision of a frozen particle with a supercooled liquid water droplet which freezes upon impact. 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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The Upper level airflow will keep the moisture pouring into the Pacific Northwest. See the frontal system that warmed us up enough to get rid of the ice and bring us more rain on the days 1-3 graphic. The graphic for days 3-7 shows a frontal system that will move toward us from the northeast. It is commonly called a “backdoor” front because it moves in from the opposite direction that fronts usually come from.  Then another frontal system is shown moving toward us from the Southwest. All of the local ski areas are open due to the repeated significant snowfalls. 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 5 in the Good category measuring Particulate Matter.

Oakridge: The Air Quality Index is 35 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: 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 WEATHER ADVISORY IS IN EFFECT UNTIL 10 AM TODAY FOR THE KLAMATH BASIN, NORTHERN AND EASTERN KLAMATH COUNTY, AND 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:

• Mostly cloudy with AM rain, showers this afternoon (0.25 in. of rain possible), rain tonight (0.25 in. of rain possible),
• Mostly cloudy with rain and a bit cooler Sunday (0.25 in. of rain possible) and in the evening, showers likely (70%) late Sunday night (0.25 in. of rain possible) and Monday AM, a good (50%) chance of showers in the afternoon, then a good (50%) chance of showers Monday night.
• highs 48-45 lows 42-36.
• A mix of clouds and sun and a bit cooler Tuesday with a (30%) chance of rain, partly cloudy with a slight (20%) chance of showers at night (snow level 1,000 ft.),
• A mix of clouds and sun and a bit cooler with a slight (20%) chance of showers Wednesday, mostly cloudy with a (30%) chance of showers Wednesday night,
• Mostly cloudy with a (40%) chance of showers Thursday, a (40%) chance of showers at night,
• Then a mix of clouds and sun and a bit cooler with a (40%) chance of showers Friday.
• highs 42-35 lows 32-30. (seasonal averages high 46 low 34)

 

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Forecast for Roseburg:

• Mostly cloudy with rain likely (70%) this AM, rain and snow showers and a bit cooler this afternoon (0.25 in. of rain possible, snow level 3,000 ft. falling to 2,500 ft.), showers likely (70%) tonight (0.25 in. of rain possible, snow level 3,000 ft. falling to 2,500 ft. late tonight),
• Mostly cloudy with AM rain and snow showers, rain and snow Sunday afternoon (0.25 in. of rain possible, snow level 2,500 ft.) rain and snow likely (70%) in the evening, rain and snow showers likely (70%) late Sunday night (0.25 in. of rain possible),
• Cloudy and a bit cooler Monday with AM showers likely (70%), then mostly cloudy with a good (50%) chance of showers and a bit cooler Monday afternoon and at night.
• highs 48-46 lows 42-36.
• Mostly cloudy with a (40%) chance of rain and a bit cooler Tuesday, a (30%) chance of rain and snow showers at night and Wednesday, a slight (20%) chance of showers Wednesday night,
• Mostly cloudy with a (40%) chance of rain Thursday, then a (40%) chance of rain and snow Thursday night and Friday (a bit cooler).
• highs 43-40 lows 36-33. (seasonal averages high 48 low 37)

 

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

• AM rain likely (70%), showers and a bit cooler this afternoon (0.25 in. of rain possible), coastal showers Saturday night while evening inland showers and inland showers likely (70%) late tonight (0.25 in. of rain possible),
• Mostly cloudy with showers Sunday AM, rain and a bit cooler in the afternoon (0.25 in. of rain possible), evening coastal rain while inland evening rain likely (70%), showers likely (70%) late Sunday night (0.25 in. of rain possible),
• Then mostly cloudy with a (40%) chance of showers and a bit cooler Monday and Monday night.
• highs 52-49 lows 44-38.
• Mostly cloudy with a (40%) chance of rain and a bit cooler Tuesday, a (30%) chance of showers Tuesday night,
• Mostly cloudy with a slight (20%) chance of showers Wednesday, a (30%) chance of showers Wednesday night,
• Then mostly cloudy with a good (50%) chance of rain and a bit cooler Thursday through Friday.
• highs 48-45 lows 39-36. (seasonal averages high 51 low 40)

 

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Forecast for the Cascades in Lane County:

• Cloudy with AM snow and rain, rain and snow showers and a bit cooler this afternoon (0.50 in. of rain possible, 3-6 in. of snow possible), snow and rain (0.50 in. of rain possible, 4-8 in. of snow possible) tonight,
• Cloudy with snow and a bit cooler Sunday and in the evening, rain and snow showers at night,
• Cloudy with snow showers likely (70%) Monday AM, a good (50%) chance of afternoon showers and a bit warmer, then mostly cloudy with a good (50%) chance of  snow showers Monday night.
• snow level 4,000 ft. tonight, 3,000 ft. Saturday and Saturday night, 2,500 ft. Sunday through Monday, then at the surface Monday night.
• highs 32-30 lows 26-23.
• A mix of clouds and sun with a (40%) chance of snow Tuesday, partly cloudy with a (40%) chance of showers at night,
• A mix of clouds and sun with a (30%) of snow showers Wednesday, mostly cloudy with a (30%) chance of snow showers Wednesday night,
• A (40%) chance of snow showers and a bit warmer Thursday and Thursday night,
• Mostly cloudy and a bit cooler with a good (50%) chance of snow showers Friday.
• snow level at the surface Tuesday through Wednesday, 2,500 ft. Wednesday night, then at the surface Thursday through Friday.
• highs 30-33 cooling to 23 Friday lows 22-24 cooling to 20 Thursday night.

 

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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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