. Here is my weekly new weather quiz question. What is an “Inversion? 

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An Upper Level Low Pressure Trough (“U “shape) is allowing moisture in the form of clouds from frontal systems to move over the Pacific Northwest and bringing cold air with it. The graphics for days 1-3 show the frontal system that pushed through Oregon Tuesday and the next one, a backdoor cold front that will drop temperatures even lower. The graphics for days 3-7 show more complex frontal activity moving our way Sunday through next Thursday keeping us wet.

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Air Quality Index:

Eugene/Springfield: The Air Quality Index is 11 in the Good category measuring Particulate Matter.

Oakridge: The Air Quality Index is 31 in the Good category measuring Particulate Matter.

Cottage Grove: The Air Quality Index is 7 in the Good category measuring Particulate Matter.

Data courtesy of Lane Regional Air Protection Agency (LRAPA)

NOTE: Outdoor burning remains temporarily prohibited for the following areas: Eugene-Springfield (Always), Florence (Always), Lowell, Oakridge and UGB, and Springfield and UGB.

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Forecast for the Southern and lower Mid Willamette Valley including Eugene-Springfield and Albany-Corvallis:

• Mostly cloudy and a bit cooler with a good (50%) chance of snow showers today (0.10 in. of rain possible, 1-2 in. of snow possible), partly cloudy with a slight (20%) chance of evening snow showers, just partly cloudy late tonight (under 0.10 in. of rain possible),
• Sunny Friday, mostly clear at night,
• Mostly sunny and a bit warmer with a slight (20%) chance of rain Saturday afternoon, evening snow likely (70%) with a slight (20%) chance of rain, then snow and rain late Saturday night (snow level 1,000 ft.).
• highs 39-44 lows 17-30.
• Mostly cloudy AM rain and snow, rain and a bit cooler Sunday afternoon (snow level 1,000 ft.), evening rain likely (70%) with a (40%) chance of snow, snow likely (70%) late Sunday night (snow level 1,000 ft.),
• Mostly cloudy with AM rain and snow likely (70%), rain and a bit warmer Monday afternoon (snow level 1,000 ft.), evening rain likely (70%) with a (30%) of snow, a good good (50%) chance of rain and snow late Monday night (snow level 1,500 ft.),
• Mostly cloudy with a good (50%) chance of AM snow, rain likely (70%) Tuesday afternoon (snow level 1,000 ft.), partly cloudy with a (40%) chance of evening rain and a slight (20%) chance of snow, partly cloudy with a slight (20%) chance of snow late Tuesday night,
• Mostly cloudy with a good (50%) chance of AM snow, then a mix of clouds and sun and a bit warmer with a good (50%) chance of rain Wednesday afternoon.
• highs 43-45 lows 30-27 (seasonal averages high 53 low 35)

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Home Wood Heating Advisory:

Posted Daily

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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Forecast for the Umpqua Valley including Roseburg:

• Mostly cloudy with AM snow showers, rain and snow showers this afternoon (0.10 in. of rain possible, 2-3 in. of snow possible lower elevations and 3-4 in. of snow possible above 1,500 ft., snow level 600 ft. this afternoon),  mostly cloudy with a good (50%) chance of snow showers tonight (under 0.10 in. of rain possible),
• Sunny and a bit warmer Friday, clear Friday night,
• AM clouds, sunny and a bit warmer Saturday afternoon, becoming mostly cloudy with a evening rain and snow likely (70%), then rain and snow late Saturday night.
• highs 40-49 lows 25-23 warming to 32 Saturday night.
• Mostly cloudy and a bit cooler with rain and snow Sunday, rain and snow likely (70%) Sunday night,
• Mostly cloudy with AM rain and snow showers, rain and snow showers and a bit warmer Monday afternoon and evening, rain and snow showers likely (70%) late Monday night,
• Mostly cloudy with AM rain and snow showers likely (70%), rain and snow showers Tuesday afternoon, a (30%) chance of rain and snow showers Tuesday night,
• Then mostly cloudy and a bit warmer with a (30%) chance of rain and snow showers Wednesday.
• highs 44-46 lows 33-29. (seasonal averages high 55 low 38)

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

• Mostly cloudy with AM showers, snow showers and a slight (20%) chance of thunderstorms, rain and snow showers likely (70%) this afternoon (0.25 in. of rain possible, 2-3 in. of snow possible below 1,000 ft. and 3-5 in. of snow possible above 1,000 ft., snow level 0 ft. rising to 500 ft. this afternoon), mostly cloudy with a (40%) chance of evening coastal rain and snow showers with  just partly cloudy at the shore late tonight while inland evening rain and snow showers likely (70%),a slight (20%) chance of inland snow showers late tonight (snow level 0 ft.),
• Sunny and a bit warmer Friday, clear Friday night,
• Sunny and a bit warmer Saturday, becoming mostly cloudy with evening rain likely (70%), then rain late Saturday night.
• highs 42-49 lows 20-32.
• Mostly cloudy with AM rain and snow, rain and snow likely (70%) Sunday afternoon and evening, rain and snow late Sunday night,
• Mostly cloudy with AM rain and snow, showers and a bit warmer and breezy Monday afternoon, rain and snow showers Monday night,
• Mostly cloudy with rain and snow showers and a bit warmer Tuesday, a (40%) chance of rain and snow showers Tuesday night,
• Mostly cloudy with a (40%) chance of AM rain and snow showers, then a (40%) chance of showers Wednesday afternoon.
• highs 47-49  lows 32-30. (seasonal averages high 54 low 42)

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Forecast for the Northern Oregon Cascades including the Cascades in Lane County:

• Mostly cloudy and a bit cooler with snow showers likely (70%) today (1 in. of snow possible, a good (50%) chance of evening snow showers, partly cloudy with a slight (20%) chance of snow showers late tonight (little or no snow accumulation expected),
• Partly cloudy with a slight (20%) chance of AM snow showers, mostly sunny and a bit warmer Friday afternoon and breezy (Wind: E 15-25 mph decreasing to E 10-15 mph in the afternoon), mostly clear at night,
• Mostly sunny and a bit warmer Saturday, partly cloudy with a good (50%) of evening snow, then mostly cloudy with a good (50%) chance of snow late Saturday night.
• snow level at the surface today through Friday morning, free air freezing level at the surface Friday afternoon and Friday night, 5,000 ft. Saturday, then snow level 2,500 ft. Saturday night.
• highs 22-39 lows 6-22.
• Mostly cloudy with snow and a bit cooler Sunday (AM snow possibly heavy at times), snow likely (70%) Sunday night,
• Mostly cloudy and a bit warmer with snow Monday, snow Monday night,
• Mostly cloudy with snow Tuesday, a good (50%) chance of snow Tuesday night,
• Then a mix of clouds and sun with a good (50%) chance of snow Wednesday.
• snow level 1,500 ft. Sunday, at the surface Sunday night, 1,500 ft.  Monday, then at the surface Monday night through Wednesday.
• highs 12-22 lows 12-22.

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For all of your Eugene-Springfield and Lane County News, Weather, and Sports go to: EugeneDailyNews.com

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