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 will strike from Salem 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 22 in the Good category measuring Particulate Matter.

Oakridge: The Air Quality Index is 77 in the Moderate category measuring Particulate Matter.

Cottage Grove: The Air Quality Index is 25 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 UNTIL 6 AM MONDAY FOR THE NORTH OREGON COAST,  THE COAST RANGE OF NORTHWEST OREGON, THE CENTRAL COAST RANGE OF WESTERN OREGON, AND THE LOWER COLUMBIA.
• A WINTER WEATHER ADVISORY IS IN EFFECT UNTIL 1 AM MONDAY FOR THE CENTRAL OREGON COAST.
• 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 CENTRAL COLUMBIA RIVER GORGE, THE LOWER COLUMBIA, AND THE UPPER HOOD RIVER VALLEY,
• A WINTER STORM WARNING IS IN EFFECT UNTIL 6 PM MONDAY FOR THE NORTHERN OREGON CASCADE FOOTHILLS AND THE NORTHERN OREGON CASCADES,
• A WINTER WEATHER ADVISORY IS IN EFFECT UNTIL 6 PM MONDAY FOR AND THE CASCADES IN LANE COUNTY AND THE UPPER HOOD RIVER VALLEY.
• A FLOOD WATCH IS IN EFFECT THROUGH MONDAY MORNING FOR THE CASCADE FOOTHILLS IN LANE COUNTY, THE CENTRAL COAST RANGE OF WESTERN OREGON, THE CENTRAL OREGON COAST, THE CENTRAL WILLAMETTE VALLEY, THE COAST RANGE OF NORTHWEST OREGON,THE GREATER PORTLAND METRO AREA, THE NORTH OREGON COAST, THE NORTHERN OREGON CASCADE FOOTHILLS, AND THE SOUTH WILLAMETTE VAlLEY.
• *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:

• Rain possibly, heavy at times, today and this evening (1.00 in. of rain possible), rain and snow and colder tonight (0.75 in. of rain possible, 2 in. of snow possible),
• Cloudy with rain and snow showers likely (70%) and a bit cooler Monday (0.25 in. of rain possible, snow level 1,000 ft.), a good (50%) chance of evening showers, a good (50%) chance of rain and snow showers late Monday night (under 0.10 in. of rain possible, snow level 1,000 ft.),
• Mostly cloudy with a good (50%) chance of AM rain, rain likely (70%) and a bit warmer Tuesday afternoon and at night.
• highs 52-40 warming to 42 Tuesday lows 35-32 warming to 37 Tuesday night.
• Mostly cloudy and a bit warmer with a good (50%) chance of rain Wednesday, rain likely (70%) Wednesday night through Friday (a bit cooler), cloudy with a good (50%) chance of rain Friday night,
• Then mostly cloudy with a slight (20%) chance of showers Saturday.
• highs 48-52 cooling to 47 Saturday lows 43-33. (seasonal averages high 50 low 35)

 

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Forecast for Roseburg:

• AM rain, a good (50%) chance of rain and a bit warmer this afternoon (0.25 in. of rain possible) and breezy (Wind: S 15-25 mph), rain tonight (0.75 in. of rain possible),
• Mostly cloudy and a bit cooler with rain and snow showers Monday (0.25 in. of rain possible, snow level 1,500 ft.), a (30%) chance of rain and snow showers at night (under 0.10 in. of rain possible),
• AM rain and snow likely (70%), rain and a bit warmer Tuesday afternoon, then cloudy with a (40%) chance of rain at night.
• highs 59-44 warming to 48 Saturday lows near 37-33 warming to 44 Tuesday night.
• Mostly cloudy with a (40%) chance of rain and a bit warmer Wednesday, rain likely (70%) at night and Thursday (a bit warmer), a (40%) chance of rain Thursday night,
• A bit cooler with showers likely (70%) Friday, cloudy with a (30%) chance of showers at night,
• Then mostly cloudy with a slight (20%) chance of showers and a bit cooler Saturday.
• highs 56-50 lows 46-38. (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 a bit 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, cloudy with a (40%) chance of rain Tuesday night,
• Cloudy with a rain likely (70%) and a bit warmer Wednesday, then rain Wednesday night.
• lows 40-38 warming to 48 Tuesday night highs 53-48 warming back to 53 Tuesday.
• 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 with patchy fog Sunday.
• highs 56-54 lows 49-42. (seasonal averages high 52 low 40)

 

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Forecast for the Cascades in Lane County:

• Cloudy with AM rain and snow likely (70%), a good (50%) chance of rain and snow (0.25 in. of rain possible, 2 in. of snow possible) this afternoon and evening and breezy (Wind: S 15-25 mph gusts to 40 mph), rain and snow and colder late tonight (0.50 in. of rain possible, 1-4 in. of snow possible),
• Mostly cloudy and a bit cooler with snow showers Monday, cloudy with a good (50%) chance of snow showers Monday night,
• Cloudy with snow and a bit warmer Tuesday, then rain and snow likely (70%) at night.
• snow level 4,500 ft. today and tonight, at the surface Monday through Tuesday, then 4,500 ft. Tuesday night.
• highs 39-28 warming to 35 Tuesday lows 24-18 warming to 28 Tuesday night.
• Mostly cloudy and a bit warmer with good (50%) chance of rain Wednesday, rain likely (70%) Wednesday night and Thursday (a bit warmer) cloudy with a good (50%) chance of showers Thursday night,
• Rain and snow likely (70%) and a bit cooler Friday, mostly cloudy with a good (50%) chance of rain and snow Friday night,
• Then a mix of clouds and sun with a slight (20%) chance of rain and snow showers Saturday.
• snow level 6,000 ft. Wednesday, 8,000 ft. Wednesday night, 7,500 ft. Thursday, 5,500 ft. Thursday night, 3,500 ft. Friday and Friday night, then 3,000 ft. Saturday.
• highs 40-36 lows 32-22.

 

 

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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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