Here is my weekly weather quiz question for the last time. What is  “Air Stagnation?” Here is the correct answer. Air Stagnation is a meteorological situation in which there is a major buildup of air pollution in the atmosphere. This usually occurs when the same air mass is parked over the same area for several days. During this time, the light winds cannot “cleanse” the buildup of smoke, dust, gases, and other industrial air pollution. 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. 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 with blue arrows) is controlling our weather for the foreseeable future. The graphic for days 1-3 shows the complex frontal system moving through the Pacific Northwest bringing rain and then snow. The worst of the storm struck from Salem North through Portland.  The graphic for days 3-7 shows another very active complex frontal system heading our way by late next week. For mountain snow conditions at the local ski areas check out their websites or give them a call.

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Air Quality Index:

Eugene-Springfield: The Air Quality Index is 32 in the Good category measuring Particulate Matter.

Oakridge: The Air Quality Index is 13 in the Good category measuring Particulate Matter.

Cottage Grove: The Air Quality Index is 5 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 UNTIL 6 AM MONDAY FOR THE NORTH OREGON COAST,  THE COAST RANGE OF NORTHWEST OREGON, THE CENTRAL COAST RANGE OF WESTERN OREGON,  THE LOWER COLUMBIA.
• A WINTER WEATHER ADVISORY IS IN EFFECT UNTIL 6 AM MONDAY FOR THE GREATER PORTLAND METRO AREA, THE CENTRAL WILLAMETTE VALLEY, THE WESTERN COLUMBIA RIVER GORGE, THE LOWER COLUMBIA, AND THE UPPER HOOD RIVER VALLEY,
• A WINTER WEATHER ADVISORY IS IN EFFECT UNTIL 6 PM MONDAY FOR THE NORTHERN OREGON CASCADES.
• A FLOOD WATCH IS IN EFFECT THROUGH TUESDAY MORNING FOR THE CENTRAL OREGON COAST, THE CENTRAL COAST RANGE OF WESTERN OREGON, THE GREATER PORTLAND METRO AREA, THE CENTRAL WILLAMETTE VALLEY, THE SOUTH WILLAMETTE VALLEY, THE NORTHERN OREGON CASCADE FOOTHILLS, AND THE CASCADE FOOTHILLS IN LANE COUNTY.
• A HIGH WIND WARNING IS IN EFFECT UNTIL 10 PM TONIGHT FOR THE SOUTH CENTRAL OREGON COAST AND THE CURRY COUNTY COAST.
• A WINTER WEATHER ADVISORY IS IN EFFECT FROM 7 PM TONIGHT UNTIL 4 PM MONDAY ABOVE 5,000 FT. FOR THE SOUTH CENTRAL OREGON CASCADES.
• A WINTER WEATHER ADVISORY IS IN EFFECT FROM 7 PM TONIGHT UNTIL 4 PM MONDAY FOR THE SOUTHERN OREGON CASCADES AND THE SISKIYOU MOUNTAINS.
• A WIND ADVISORY IS IN EFFECT UNTIL 10 PM TONIGHT FOR JACKSON COUNTY.
• A HIGH WIND WARNING IS IN EFFECT UNTIL 1 PM MONDAY FOR NORTHERN AND EASTERN KLAMATH COUNTY, AND WESTERN, CENTRAL, AND EASTERN LAKE COUNTY.
• A WINTER WEATHER ADVISORY IS IN EFFECT FROM 1 AM UNTIL 4 PM MONDAY FOR NORTHERN AND EASTERN KLAMATH COUNTY, AND 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.

 

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

• Cloudy rain, possibly mixed with snow this evening (no accumulation expected), rain and colder late tonight (0.75 in. of rain possible),
• Mostly cloudy with showers likely (70%) and a bit cooler Monday (0.25 in. of rain possible), mostly cloudy with a good (50%) chance of showers Monday night (under 0.10 in. of rain possible),
• Mostly cloudy with a slight (20%) chance of AM rain, a good (50%) chance of rain and a bit cooler Tuesday afternoon (under 0.10 in. of rain possible), cloudy with a good (50%) chance of rain at night (0.10 in. of rain possible),
• Cloudy with AM rain likely (70%), mostly cloudy and a bit warmer with a good (50%) chance of rain Wednesday afternoon, then rain likely (70%) Wednesday night.
• lows 33-46 highs 42-52.
• Mostly cloudy and a bit warmer with a good (50%) chance of showers Thursday night,
• Cloudy and a bit cooler with a good (50%) chance of rain Friday, mostly cloudy with a good (50%) chance of showers at night,
• A mix of clouds and sun and a bit warmer with a slight (20%) chance of showers Saturday, partly cloudy Saturday night,
• Then partly cloudy and a bit warmer with patchy fog Sunday.
• highs 56-47 warming to 50 Sunday lows 42-35. (seasonal averages high 50 low 35)

 

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Forecast for Roseburg:

• Cloudy with rain tonight (0.75 in. of rain possible),
• Mostly cloudy and much cooler with rain and snow showers Monday (0.25 in. of rain possible, 1 in. of snow possible, snow level 1,500 ft. rising to 2,000 ft. in the afternoon), a (30%) chance of evening rain and snow showers, a (40%) chance of rain and snow at night (under 0.10 in. of rain possible, snow level 2,000 ft.),
• AM rain and snow likely (70%), rain likely (70%) and a bit warmer Tuesday afternoon (0.25 in. of rain possible, snow level 2,000 ft. rising to 3,000 ft. in the afternoon), cloudy with a (40%) chance of rain Tuesday night (0.10 in. of rain possible),
• Mostly cloudy with rain likely (70%) and a bit warmer Wednesday, then rain at night.
• lows 38-35 warming to 50 Wednesday night highs 46-57.
• Cloudy with rain Thursday and a bit warmer, mostly cloudy with a good (50%) chance of rain Thursday night,
• Mostly cloudy with rain likely (70%) and a bit cooler Friday, cloudy with a (40%) chance of showers at night,
• Mostly cloudy with a slight (20%) chance of rain and snow showers and a bit cooler Saturday, mostly cloudy Saturday night,
• Then sunny and a bit warmer with patchy fog Sunday.
• highs 58-50 warming to 55 Sunday lows 42-34. (seasonal averages high 52 low 37)

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

• Mostly cloudy with rain possibly heavy at times this evening, rain late tonight (1.50 in. of rain possible), and windy (Wind: SW 20-30 mph shifting W 10-15 mph late tonight at the shore while SW 10-20 mph inland),
• Mostly cloudy with coastal showers and much cooler Monday while AM rain and snow showers inland with inland showers in the afternoon (0.25 in. of rain possible, no snow accumulation expected, snow level 1,500 ft. rising to 2,000 ft. in the afternoon), mostly cloudy with a (30%) chance of evening showers, a (40%) chance of rain late Monday night (under 0.10 in. of rain possible, snow level 2,000 ft.),
• Mostly cloudy and a bit warmer with rain likely (70%) Tuesday (0.25 in. of rain possible), cloudy with a (40%) chance of rain Tuesday night (0.10 in. of rain possible),
• Cloudy with a rain likely (70%) and a bit warmer Wednesday, then rain Wednesday night.
• lows 42-38 warming to 52 Wednesday night highs 49-56.
• Mostly cloudy and a bit warmer with rain and breezy Thursday, rain likely (70%) and colder Thursday night,
• Mostly cloudy and a bit cooler with rain likely (70%) Friday, a good (50%) chance of showers at night,
• Just mostly cloudy Saturday, mostly clear at night,
• Then partly cloudy and a bit warmer with patchy fog Sunday.
• highs 58-53 warming to 56 Sunday lows 45-39. (seasonal averages high 52 low 40)

 

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Forecast for the Cascades in Lane County:

• Cloudy with a good (50%) chance of rain and snow this evening, rain and snow and colder late tonight (0.50 in. of rain possible, 2-5 in. of snow possible),
• Mostly cloudy and a bit cooler with snow showers Monday (2-5 in. of snow possible), mostly cloudy with evening snow showers, a good (50%) chance of snow showers and cold Monday night,
• Mostly cloudy with good (50%) chance of AM snow, rain and snow likely (70%) and a bit warmer Tuesday afternoon, cloudy with evening rain and snow likely (70%), a good (50%) chance of rain and snow at night,
• Mostly cloudy and a bit warmer with rain and snow likely (70%) Wednesday, then rain likely (70%) Wednesday night.
• snow level 5,000 ft. tonight, at the surface Monday and Monday night, 4,000 ft. Tuesday afternoon, 5,000 ft. Tuesday night, 5,500 ft. Wednesday, then 8,000 ft. Wednesday night.
• lows 25-19 warming to 35 Wednesday night highs 28-40.
• Mostly cloudy with rain and a bit warmer Thursday, rain and snow showers likely (70%) Thursday night,
• Rain likely (70%) with a (40%) chance of snow and a bit cooler Friday, rain and snow showers likely (70%) Friday night,
• Mostly cloudy and a bit warmer with a (30%) chance of rain and snow showers Saturday, then partly cloudy Saturday night and Sunday (a bit warmer).
• snow level 8,000 ft. Thursday, 6,000 ft. Thursday night, 4,000 ft. Friday and Friday night, 3,000 ft. Saturday, freezing level 4,000 ft. Saturday night, then 7,500 ft. Sunday.
• highs 42-32 warming to 37 Sunday lows 30-23.

 

 

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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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