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 frontal system moving in and to the north warming us and keeping us in showers. The graphic for days 3-7 shows very active complex frontal systems heading our way 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 19 in the Good category measuring Particulate Matter.

Oakridge: The Air Quality Index is 12 in the Good category measuring Particulate Matter.

Cottage Grove: The Air Quality Index is 9 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 WATCH IS IN EFFECT FROM SUNDAY MORNING THROUGH MONDAY MORNING FOR THE NORTH OREGON COAST, THE CENTRAL OREGON COAST, THE LOWER COLUMBIA, THE GREATER PORTLAND METRO AREA, THE CENTRAL WILLAMETTE VALLEY, THE SOUTH WILLAMETTE VALLEY, THE WESTERN COLUMBIA RIVER GORGE, THE CENTRAL COLUMBIA RIVER GORGE, AND THE UPPER HOOD RIVER VALLEY.
• A WINTER STORM WATCH IS IN EFFECT FROM SUNDAY MORNING THROUGH MONDAY AFTERNOON FOR THE COAST RANGE OF NORTHWEST OREGON, THE CENTRAL COAST RANGE OF WESTERN OREGON, THE NORTHERN OREGON CASCADE FOOTHILLS, THE CASCADE FOOTHILLS IN LANE COUNTY, THE NORTHERN OREGON CASCADES, AND THE CASCADES IN LANE COUNTY.
• A WINTER WEATHER ADVISORY IS IN EFFECT UNTIL 10 AM SUNDAY FOR 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 SUNDAY FOR THE NORTHERN OREGON CASCADES.
• A HIGH WIND WARNING IS IN EFFECT FROM 4 AM UNTIL 10 PM SUNDAY FOR THE SOUTH CENTRAL OREGON COAST AND THE CURRY COUNTY COAST.
• A WINTER WEATHER ADVISORY IS IN EFFECT UNTIL 4 AM SUNDAY FOR THE SOUTH CENTRAL OREGON CASCADES.
• A WIND ADVISORY IS IN EFFECT FROM 10 AM UNTIL 10 PM SUNDAY FOR JACKSON COUNTY.
• A HIGH WIND WARNING IS IN EFFECT FROM 10 AM SUNDAY UNTIL 1PM 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:

• Mostly cloudy with rain at times tonight (1.00 in. of rain possible),
• Rain possibly, heavy at times, Sunday and evening (1.00 in. of rain possible), rain and snow and colder at night (0.75 in. of rain possible, 2 in. of snow possible),
• Cloudy with rain and snow showers likely (70%) and a bit cooler Monday afternoon (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),
• Mostly cloudy with a good (50%) chance of AM rain, rain likely (70%) and a bit warmer Tuesday afternoon and at night.
• lows 44-32 warming to 37 Tuesday night highs 52-40 warming to 42 Tuesday.
• 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:

• Mostly cloudy with showers this evening, rain late tonight (0.25 in. of rain possible),
• AM rain, a good (50%) chance of rain and a bit warmer Sunday afternoon (0.25 in. of rain possible) and breezy (Wind: S 15-25 mph), rain Sunday night (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.
• lows near 43-35 highs 59-44 warming to 48 Saturday.
• 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 evening showers, rain late tonight (0.75 in. of rain possible) and windy (Wind: SW 20-30 mph at the shore while S 10-20 mph inland),
• Rain and a bit warmer Sunday (0.75 in. of rain possible) and windy (Wind: S 25-35 at the shore while S 15-25 mph inland), rain possibly heavy at times in the evening, rain late at night (1.50 in. of rain possible), and breezy (Wind W 20-30 mph shifting NW 15-25 mph late evening at the shore while W 10-20 mph inland decreasing to NW 5-10 mph late at night),
• Mostly cloudy coastal showers and a bit cooler Monday while rain and snow showers inland rain (0.25 in. of rain possible, snow level 1,500 ft. rising to 2,000 ft. in the afternoon), mostly cloudy with a (30%) chance of showers Monday night (under 0.10 in. of rain possible, snow level 2,000 ft.),
• Mostly cloudy and a bit warmer with rain Tuesday, then cloudy with a good (50%) chance of rain Tuesday night.
• lows 46-40 highs 53-48 warming back to 53 Tuesday.
• Cloudy with a good (50%) chance of rain and a bit warmer Wednesday, rain Wednesday night and Thursday (a bit warmer), rain likely (70%) Thursday night and breezy,
• Mostly cloudy and a bit cooler with showers likely (70%) Friday, a good (50%) chance of showers at night,
• Then just mostly cloudy Saturday.
• highs 56-54 lows 49-42. (seasonal averages high 52 low 40)

 

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Forecast for the Cascades in Lane County:

• Mostly cloudy with rain and snow tonight (0.50 in. of rain possible, 3-6 in. of snow possible) and breezy (Wind: SW 15-25 mph gusts to 40 mph),
• Cloudy with AM rain and snow likely (70%) Sunday, a good (50%) chance of rain and snow (0.25 in. of rain possible, 2 in. of snow possible) in the afternoon and evening and breezy (Wind: S 15-25 mph gusts to 40 mph), rain and snow and colder late Sunday night (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. tonight through Sunday night, at the surface Monday through Tuesday, then 4,500 ft. Tuesday night.
• lows 32-18 warming to 28 Tuesday night highs 39-28 warming to 35 Tuesday.
• 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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