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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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 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 78 in the Moderate category measuring Particulate Matter.

Oakridge: The Air Quality Index is 17 in the Good category measuring Particulate Matter.

Cottage Grove: The Air Quality Index is 57 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: RED – Wood burning is Prohibited. (Unhealthy levels expected again tonight.)

*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 4 AM TUESDAY 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 with a slight (20%) chance of rain tonight and patchy fog late at night and Tuesday AM, cloudy with a good (50%) chance of rain Tuesday afternoon (under 0.10 in. of rain possible) and Tuesday 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, freezing rain and snow late Wednesday night (snow level 1,000 ft.),
• Mostly cloudy and a bit cooler with AM freezing rain and rain likely (70%), rain and a good (50%) chance of freezing rain and a bit cooler Thursday afternoon, then rain likely (70%) at night.
• lows 36-32 warming to 34 Thursday night highs 47-37.
• Mostly cloudy with rain and a bit warmer Friday, rain likely (70%) Friday night and Saturday, cloudy with a good (50%) chance of showers Saturday night,
• Then cloudy and a bit warmer with a good (50%) chance of rain Sunday through Monday.
• highs near 46 lows 38-36. (seasonal averages high 49 low 35)

 

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Forecast for Roseburg:

• Partly cloudy this evening, mostly cloudy with a slight (20%) chance of rain late tonight,
• Cloudy and a bit cooler with a slight (20%) chance of rain Tuesday, a (30%) chance of  rain Tuesday night (evening snow level 3,500 ft.),
• Cloudy and a bit warmer with a (30%) chance of rain Wednesday, a (40%) chance of evening rain, rain late Wednesday night,
• Then mostly cloudy and a bit cooler with rain Thursday and at night.
• lows near 38 highs 50-52 cooling back to 50 Thursday.
• Mostly cloudy and a bit warmer 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 through Monday (a bit cooler).
• highs 52-54 cooling back to 52 Monday lows 44-42. (seasonal averages high 51 low 37)

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

• Partly cloudy this evening, mostly cloudy with a slight (20%) chance of rain late tonight,
• Cloudy with a slight (20%) chance of rain and a bit cooler Tuesday, a (40%) of rain Tuesday night and Wednesday (a bit warmer), a good (50%) chance of evening rain, rain late Wednesday night through Thursday night.
• lows 42-39 warming to 43 Wednesday night highs 52-54 cooling back to 52 Thursday.
• Mostly cloudy and a bit warmer with rain likely (70%) Friday and at night,
• Mostly cloudy and a bit warmer with a showers likely (70%) Saturday, cloudy with a (40%) chance of showers Saturday night,
• Then mostly cloudy and a bit warmer with a good (50%) chance of rain Sunday through Monday (a bit cooler).
• highs 52-56 cooling to 54 Monday lows 47-45. (seasonal averages high 52 low 40)

 

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Forecast for the Cascades in Lane County:

• Partly cloudy this evening, mostly cloudy late tonight,
• Cloudy and cooler with a good (50%) chance of rain and snow Tuesday (0.10 in. of rain possible), a (40%) chance of evening rain and snow, rain and snow likely (70%) Tuesday night (0.25 in. of rain possible, 1-3 in. of snow possible),
• Cloudy with a AM rain and snow likely (70%), a bit cooler with a good (50%) chance of rain and snow Wednesday, a good (50%) chance of rain and snow Wednesday night,
• Mostly cloudy with rain and snow and a bit cooler Thursday, then rain and snow likely (70%) at night.
• free air freezing level 7,000 ft. falling to 5,000 ft. tonight, snow level 3,500 ft. Tuesday, 4,000 ft. Tuesday night and Wednesday, 3,000 ft. Wednesday night and Thursday, then 3,500 ft. Thursday night.
• lows 28-24 warming back to 28 Thursday night highs 37-30.
• Mostly cloudy and a bit warmer with rain and snow Friday through Saturday, a good (50%) chance of rain and snow showers Saturday night,
• Cloudy and a bit warmer with a (40%) chance of rain and snow Sunday, cloudy with a good (50%) chance of rain and snow Sunday night,
• Then rain and snow likely (70%) and a bit warmer Monday.
• snow level 5,000 ft. Friday, 5,500 ft. Friday night, 5,000 ft. Saturday through Sunday night, then 4,500 ft. Monday.
• highs 35-37 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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