Here is my new 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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The Upper Level High Pressure Ridge (Shaded “Arch” shape with blue arrows) that kept the Pacific Northwest dry is weakening . The graphic for days 1-3 shows a disturbance forming that will bring clouds and the chance of precipitation as it gets stuck as a stationary front. The graphic for days 3-7 shows a more complex frontal system 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 80 in the Moderate category measuring Particulate Matter.

Oakridge: The Air Quality Index is 83 in the Moderate category measuring Particulate Matter.

Cottage Grove: The Air Quality Index is 54 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:

• AN AIR STAGNATION ADVISORY IS IN EFFECT UNTIL NOON TUESDAY FOR THE CENTRAL WILLAMETTE VALLEY, THE SOUTH WILLAMETTE VALLEY, THE NORTHERN OREGON CASCADE FOOTHILLS, AND THE CASCADE FOOTHILLS IN LANE COUNTY.
• AN AIR STAGNATION ADVISORY IS IN EFFECT UNTIL 1 PM MONDAY FOR CENTRAL DOUGLAS COUNTY.
• AN AIR STAGNATION ADVISORY IS IN EFFECT UNTIL 1 PM TUESDAY FOR EASTERN CURRY COUNTY, JOSEPHINE COUNTY, JACKSON COUNTY, THE KLAMATH BASIN, NORTHERN AND EASTERN KLAMATH COUNTY, AND CENTRAL, EASTERN AND WESTERN 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 and cooler with a slight (20%) chance of drizzle or light rain this afternoon, possible sun peeks, mostly cloudy with a slight (20%) chance of rain late tonight (under 0.10 in. of rain possible),
• Cloudy and a bit warmer with a good (50%) chance of rain Tuesday (0.10 in. of rain possible), a (40%) chance of rain at night,
• Cloudy with rain and snow likely (70%) Wednesday AM, a bit cooler with a good (50%) chance of rain and snow in the afternoon (snow level 1,000 ft.), a good (50%) chance of evening rain and snow, a good (50%) chance of rain and snow and freezing rain late Wednesday night (snow level 1,000 ft.).
• highs 48-42 lows 36-32.
• Mostly cloudy and a bit cooler with AM freezing rain or rain, rain and a good (50%) chance of freezing rain Thursday afternoon, rain likely (70%) with a (40%) chance of freezing rain Thursday night and Friday AM, rain likely (70%) and a bit warmer in the afternoon and Friday night,
• Mostly cloudy with a (30%) chance of AM rain, a bit warmer with a good (50%) chance of showers Saturday afternoon, a (40%) chance of showers at night,
• Then mostly cloudy and a bit warmer with a good (50%) chance of rain Sunday.
• highs 40-49 lows 34-38. (seasonal averages high 48 low 35)

 

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Forecast for Roseburg:

• Mostly cloudy and a bit warmer this afternoon, mostly cloudy with a slight (20%) chance of rain late tonight,
• Cloudy with a slight (20%) chance of rain Tuesday (afternoon snow level 3,500 ft.), cloudy with a (30%) chance of  rain Tuesday night,
• Cloudy and a bit cooler with a (30%) chance of showers Wednesday, then rain Wednesday night.
• highs 52-50 warming back to 52 Wednesday lows near 38.
• Cloudy with rain likely (70%) Thursday, rain at night,
• Mostly cloudy with rain likely (70%) Friday and Friday night,
• Mostly cloudy and a bit warmer with a (40%) chance of showers Saturday and at night,
• Then mostly cloudy with a (40%) chance of rain and a bit warmer Sunday.
• highs 50-53 lows 42-44 cooling to 40 Saturday night. (seasonal averages high 51 low 37)

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

• Mostly sunny and a bit warmer this afternoon, partly cloudy in the evening, mostly cloudy tonight with a slight (20%) chance of rain late at night,
• Cloudy with a slight (20%) chance of rain and a bit cooler Tuesday, a (30%) of rain Tuesday night,
• Cloudy with a (30%) chance of showers and a bit warmer Wednesday, mostly cloudy with a good (50%) chance of evening rain, then rain Wednesday night.
• highs 56-52 warming to 54 Wednesday lows 42-39 warming to 43 Wednesday night.
• Mostly cloudy with rain and a bit cooler Thursday and Thursday night,
• Rain and a bit warmer Friday, rain likely (70%) Friday night,
• Cloudy and a bit cooler with a good (50%) chance of showers Saturday and at night,
• Then mostly cloudy and a bit warmer with a good (50%) chance of rain Sunday.
• highs 52-55 lows 46-44. (seasonal averages high 52 low 40)

 

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Forecast for the Cascades in Lane County:

• A mix of clouds and sun and a bit warmer this afternoon, partly cloudy this evening, mostly cloudy tonight,
• Cloudy and cooler with a good (50%) chance of rain and snow Tuesday and in the evening, rain and snow likely (70%) Tuesday night,
• Cloudy with a good (50%) chance of rain and snow a bit cooler Wednesday and Wednesday night.
• free air freezing level 7,000 ft. rising to 9,000 ft. today, 7,000 ft. falling to 5,000 ft. late tonight, snow level 3,500 ft. Tuesday, 4,000 ft. Tuesday night, 4,500 ft. Wednesday, then 4,000 ft. Wednesday night.
• highs 43-36 lows 28-26.
• Mostly cloudy with rain and snow and a bit cooler Thursday, rain and snow likely (70%) at night,
• Rain and snow Friday and Friday night,
• Cloudy with a good (50%) chance of AM rain and snow, a good (50%) chance of rain and snow showers Saturday afternoon and a bit warmer, a (40%) chance of rain and snow showers Saturday night,
• Then mostly cloudy and a bit warmer with a good (50%) chance of rain and snow Sunday.
•  snow level 3,000 ft. Thursday, 4,500 ft. Thursday night, 5,000 ft. Friday, 5,500 ft. Friday night, 5,000 ft. Saturday and Saturday night, then 4,500 ft. Sunday.
• highs 33-36 lows near 27.

 

 

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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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