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 show the next frontal system that moves in Thursday bringing back the freezing Winter precipitation. 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 66 in the Moderate category measuring Particulate Matter.

Oakridge: The Air Quality Index is 14 in the Good category measuring Particulate Matter.

Cottage Grove: The Air Quality Index is 65 in the Moderate category measuring Particulate Matter.

Data courtesy of Lane Regional Air Protection Agency (LRAPA)

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Home Wood Heating Advisory:

Eugene-Springfield: YELLOW – Caution is Advised.

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 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, just cloudy late tonight (under 0.10 in. of rain possible),
• Cloudy with a slight (20%) chance of AM rain and snow Wednesday, a bit cooler with a (30%) chance of rain and snow in the afternoon and evening (under 0.10 in. of rain possible, snow level 1,500 ft.), a slight (20%) chance of rain and snow late Wednesday night (under 0.10 in. of rain possible),
• Cloudy with a slight (20%) chance of AM rain and snow, a bit cooler with rain, freezing rain, sleet and snow Thursday afternoon (0.10 in. of rain possible) and evening, rain, freezing rain and sleet late Thursday night (0.25 in. of rain possible, snow level 1,500 ft),
• Mostly cloudy with AM rain and freezing rain Friday, rain with a (30%) chance of freezing rain and a bit warmer in the afternoon, then rain Friday night.
• lows 33-30 warming to 38 Friday night highs 42-39 warming to 43 Friday.
• Mostly cloudy and a bit warmer with rain likely (70%) Saturday through Sunday night,
• Mostly cloudy and a bit warmer with a good (50%) chance of showers Monday, then cloudy with a good (50%) chance of rain Monday night and Tuesday.
• highs near 44 lows 36-34. (seasonal averages high 49 low 35)

 

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Forecast for Roseburg:

• Cloudy and a bit cooler with a (30%) chance of rain tonight (under 0.10 in. of rain possible),
• Cloudy and a bit cooler with a slight (20%) chance of rain Wednesday (under 0.10 in. of rain possible) and at night (under 0.10 in. of rain possible),
• Mostly cloudy and a bit cooler with rain Thursday (0.25 in. of rain possible Thursday and Thursday night) through Friday (a bit warmer), then showers Friday night.
• lows near 37-42 highs 49-46 warming to 52 Friday.
• Mostly cloudy with rain likely (70%) Saturday, rain Saturday night and Sunday (a bit cooler), showers likely (70%) Sunday night,
• Mostly cloudy and a bit cooler with rain and snow showers likely (70%) Monday, then a good (50%) chance of rain and snow showers and a bit  cooler Monday night and Tuesday.
• highs 50-46 lows 42-35. (seasonal averages high 52 low 37)

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

• Cloudy with a (30%) of rain tonight (under 0.10 in. of rain possible),
• A slight (20%) chance of rain a bit warmer Wednesday (under 0.10 in. of rain possible), a (30%) chance of rain Wednesday night (under 0.10 in. of rain possible),
• Mostly cloudy with rain Thursday (0.25 in. of rain possible Thursday and Thursday night) through Friday, then showers Friday night.
• lows 42-49 highs near 55.
• Mostly cloudy and a bit cooler with rain and breezy Saturday and Saturday night,
• Mostly cloudy and a bit cooler with rain likely (70%) Sunday, showers likely (70%) Sunday night,
• Mostly cloudy with rain and snow showers likely (70%) and a bit cooler Monday, then a good (50%) chance of rain and snow showers Monday night and Tuesday.
• highs 52-48 lows 43-40. (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 tonight (under 0.10 in. of rain possible),
• Cloudy and a bit cooler with a good (50%) chance of rain and snow Wednesday and in the evening (0.10 in. of rain possible), a good (50%) chance of rain and snow late Wednesday night (under 0.10 in. of rain possible),
• Cloudy with a good (50%) chance of AM rain and snow, rain and snow Thursday afternoon through Friday night.
• snow level 4,000 ft. tonight and Wednesday, 3,000 ft. Wednesday night and Thursday, 3,500 ft. Thursday night, 5,000 ft. Friday, then 5,500 ft. Friday night.
• lows 28-25 warming back to 28 Friday night highs near 36.
• Mostly cloudy and a bit warmer with rain and snow Saturday and Saturday night,
• Cloudy and a bit warmer with rain and snow likely (70%) Sunday and Sunday night,
• Mostly cloudy and a bit cooler with snow showers likely (70%) Monday, then snow likely (70%) Monday night and Tuesday (a bit cooler).
• snow level  5,000 ft. Saturday, 4,500 ft. Saturday night, 3,500 ft. Sunday, 3,000 ft. Sunday night, at the surface Monday, 2,500 ft. Monday night, then at the surface Tuesday.
• highs 36-38 cooling to 32 Tuesday lows 26-23.

 

 

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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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