Here is my weekly weather quiz question. What is  “Air Stagnation?” 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) will be controlling our weather for the foreseeable future. The graphic for days 1-3 shows the frontal system that moves in and the one moving on to the coast bringing back the freezing Winter precipitation for a short time. You can expect just about everything except the kitchen sink to fall from the sky. The graphic for days 3-7 shows more complex frontal systems building up and heading our way. 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 23 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 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: 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 STORM WATCH IS IN EFFECT FROM THURSDAY AFTERNOON THROUGH FRIDAY EVENING FOR THE COAST RANGE OF NORTHWEST OREGON, THE CETRAL WILLAMETTE VALLEY, AND THE NORTHERN OREGON CASCADE FOOTHILLS.
• A WINTER STORM WATCH IS IN EFFECT FROM THURSDAY MORNING THROUGH FRIDAY AFTERNOON FOR THE CENTRAL COAST RANGE OF WESTERN OREGON, THE SOUTH WILLAMETTE VALLEY, AND THE CASCADE FOOTHILLS IN LANE COUNTY.
• A WINTER STORM WATCH IS IN EFFECT FROM THURSDAY EVENING THROUGH LATE FRIDAY NIGHT FOR THE LOWER COLUMBIA AND THE GREATER PORTLAND METRO AREA.
• A WINTER STORM WATCH IS IN EFFECT FROM THURSDAY EVENING THROUGH SATURDAY AFTERNOON FOR THE WESTERN COLUMBIA RIVER GORGE, THE CENTRAL COLUMBIA GORGE, AND THE UPPER HOOD RIVER VALLEY.
• A WINTER STORM WATCH IS IN EFFECT FROM THURSDAY EVENING THROUGH LATE FRIDAY NIGHT FOR THE LOWER COLUMBIA.
• A WIND ADVISORY IS IN EFFECT UNTIL 4 AM FRIDAY FOR THE GREATER PORTLAND METRO AREA.
• A WINTER WEATHER ADVISORY IS IN EFFECT FROM 4 PM THURSDAY UNTIL 10 AM SATURDAY ABOVE 500 FT. FOR THE SOUUTH CENTRAL OREGON CASCADES, THE SOUTHERN OREGON CASCADES AND THE SISKIYOU MOUNTAINS.
• 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 with a slight (20%) chance of evening rain (under 0.10 in. of rain possible), just cloudy late tonight,
• Cloudy with a slight (20%) chance of AM rain and freezing rain, rain likely (70%) and a bit cooler Thursday afternoon (0.10 in. of rain possible), evening rain likely (70%), rain with a (%) chance of freezing rain late Thursday night (0.25 in. of rain possible, 0.10 in. of ice accumulation possible),
• Mostly cloudy with AM rain and freezing rain likely (70%), rain and a bit warmer Friday afternoon and at night,
• Mostly cloudy and a bit warmer with rain likely (70%) Saturday and Saturday night.
• lows 32-42 cooling to 38 Saturday night highs 36-48.
• Cloudy with a (30%) chance of rain Sunday, rain Sunday night,
• Cloudy and a bit cooler with a good (50%) chance of showers Monday, showers likely (70%) Monday night,
• Cloudy with a good (50%) chance of rain Tuesday, mostly cloudy with a (30%) chance of showers at night,
• Then cloudy and a bit warmer with a good (50%) chance of rain Wednesday.
• highs 50-45 warming to 47 Wednesday lows 36-34 warming back to 36 Tuesday night. (seasonal averages high 49 low 35)

 

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Forecast for Roseburg:

• Cloudy with a slight (20%) chance of rain tonight (under 0.10 in. of rain possible),
• Mostly cloudy and a bit warmer with rain likely (70%) Thursday (0.25 in. of rain possible), rain and a bit warmer Thursday night through Friday night,
• Mostly cloudy with showers and a bit cooler Saturday, then showers likely (70%) Saturday night.
• lows near 39-42 cooling back to 39 Saturday night highs 52-54 cooling back to 52 Saturday.
• Cloudy and a bit warmer with a (30%) chance of rain Sunday, rain Sunday night,
• Mostly cloudy and a bit cooler with a (30%) chance of rain and snow showers Monday, rain and snow showers likely (70%) Monday night,
• Rain likely (70%) and a bit warmer Tuesday, mostly cloudy with a (40%) chance of showers at night,
• Then mostly cloudy and a bit warmer with a (30%) chance of rain Wednesday.
• highs 54-48 warming back to 54 Wednesday lows 42-38. (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 a slight (20%) chance of rain tonight (under 0.10 in. of rain possible),
• Mostly cloudy and a bit warmer with rain Thursday (0.25 in. of rain possible Thursday and Thursday night) through Friday night,
• Then mostly cloudy and a bit cooler with showers Saturday and Saturday night.
• lows 42-46 cooling to 43 Saturday night highs 55-53.
• Cloudy with a slight (20%) chance of rain and breezy Sunday AM, a bit warmer with rain likely (70%) and breezy in the afternoon, rain and windy Sunday night,
• Mostly cloudy and breezy with a good (50%) chance of showers and a bit cooler Monday, showers likely (70%) Monday night,
• Cloudy and a bit warmer with rain likely (70%) Tuesday, mostly cloudy with a good (50%) chance of showers at night,
• Then mostly cloudy with rain likely (70%) and a bit warmer Wednesday.
• highs 55-49 warming to 54 Wednesday lows near 42. (seasonal averages high 52 low 40)

 

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Forecast for the Cascades in Lane County:

• Cloudy and a bit cooler with a slight (20%) chance of rain and snow tonight (under 0.10 in. of rain possible),
• Cloudy with a good (50%) chance of AM rain and snow, snow becoming likely (70%) Thursday afternoon (0.25 in. of rain possible, 2 in. of snow possible), rain and snow likely (70%) Thursday night (0.10 in. of rain possible, 2 in. of snow possible),
• Then rain and snow Friday (a bit warmer) through Saturday night.
• snow level 3,000 ft. tonight, at the surface Thursday, 3,500 ft. Thursday night, then 4,500 ft. Friday through Saturday night.
• lows 25-32 cooling to 28 Saturday night highs 33-37 cooling to 35 Saturday.
• Cloudy and a bit warmer with a (30%) chance of rain and snow Sunday, rain and snow likely (70%) Sunday night,
• Mostly cloudy and a bit cooler with rain and snow showers likely (70%) Monday, rain and snow showers Monday night,
• Rain and snow Tuesday, mostly cloudy with a (40%) chance of rain and snow showers at night,
• Then cloudy with a good (50%) chance of rain and a bit warmer Wednesday.
• snow level 4,500 ft. Sunday, 5,000 ft. Sunday night, 3,000 ft. Monday and Monday night, 3,500 ft. Tuesday, 5,500 ft. Tuesday night, then 7,000 ft. Wednesday.
• highs 37-33 warming to 36 Wednesday lows 28-24.

 

 

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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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