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. 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 Saturday through next Wednesday keeping us wet.

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Air Quality Index:

Eugene/Springfield: The Air Quality Index is 12 in the Good category measuring Particulate Matter.

Oakridge: The Air Quality Index is 27 in the Good category measuring Particulate Matter.

Cottage Grove: The Air Quality Index is 10 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 with rain and snow showers and a bit cooler today (0.25 in. of rain possible, 1 in. of snow possible, snow level 500 ft.), evening showers likely (70%), a good (50%) chance of snow showers late tonight (0.10 in. of rain possible, 1 in. of snow possible),
• Mostly cloudy with a good (50%) chance of snow showers Thursday (0.10 in. of rain possible), partly cloudy with a slight (20%) chance of evening snow showers, just partly cloudy late at night,
• Mostly sunny Friday, then partly cloudy Friday night.
• highs near 40 lows 24-16.
• Partly cloudy and a bit warmer with a slight (20%) chance of rain and snow Saturday afternoon, a slight (20%) chance of evening rain and snow, mostly cloudy with snow and rain late Saturday night (snow level 1,000 ft.),
• Mostly cloudy AM rain and snow, rain likely (70%) Sunday afternoon (snow level 1,500 ft.), rain and snow likely (70%) at night (snow level 1,000 ft.),
• Mostly cloudy with a good (50%) chance of AM rain and snow, rain likely (70%) Monday afternoon (snow level 1,000 ft.), a good (50%) chance of evening snow with rain likely (70%), 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 rain and snow, then a good (50%) chance of rain and a bit warmer Tuesday afternoon (snow level 1,000 ft.).
• highs 42-44 lows 27-32 cooling to 29 Monday night (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 rain and snow showers with a slight (20%) chance of thunderstorms and a bit cooler today (0.25 in. of rain possible, 3-6 in. of snow at lower elevations with 5-9 in. snow above 1,500 ft. , snow level 900 ft.), evening showers, snow showers and a slight (20%) chance of thunderstorms, colder with snow showers likely (70%) late tonight (0.10 in. of rain possible, 1-3 in. of snow possible lower elevations with 3-5 in. of snow above 1,500 ft., snow level 100 ft.),
• Mostly cloudy with AM snow showers likely (70%), a good (50%) chance of snow showers Thursday afternoon (0.10 in. of rain possible),  a (40%) chance of snow showers at night,
• AM clouds, sunny and a bit warmer Friday afternoon, mostly clear in the evening, then partly cloudy Friday night.
• highs 39-43 lows 26-20 warming to 23 Friday night.
• Some AM clouds, mostly sunny and a bit warmer with a slight (20%) chance of showers Saturday afternoon, partly cloudy with a (30%) chance of evening rain and snow showers, mostly cloudy with a (40%) chance of rain and snow showers late Saturday night,
• Mostly cloudy with rain and snow showers Monday, rain and snow showers likely (70%) Monday night,
• Then mostly cloudy and a bit warmer with rain and snow showers likely (70%).
• highs 46-44 warming to 47 Tuesday lows 23-34. (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 coastal showers, snow showers and a slight (20%) chance of thunderstorms with coastal showers and a slight (20%) chance of thunderstorms and a bit cooler this afternoon while inland showers, snow showers and a slight (20%) chance of thunderstorms and a bit cooler today (0.10 in. of rain possible), coastal showers, snow showers and a slight (20%) chance of thunderstorms at night while inland showers, snow showers and a slight (20%) chance of thunderstorms with inland showers and a slight (20%) chance of thunderstorms late tonight (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 200 ft.)
• Mostly cloudy with AM coastal showers, snow showers and and a slight (20%) chance of thunderstorms with rain and snow showers likely (70%) Thursday afternoon while inland AM snow showers with a good (50%) chance of inland rain and snow showers Thursday afternoon (0.10 in. of rain possible), mostly cloudy with a (40%) chance of evening coastal rain and snow showers and just partly cloudy late at night while mostly cloudy with a good (50%) chance of inland snow showers at night,
• Mostly sunny and a bit warmer Friday, then mostly clear Friday night.
• highs 42-46 lows 30-22 warming to 24 Friday night.
• Mostly sunny with a slight (20%) chance of showers and a bit warmer Saturday afternoon, mostly cloudy with a good (50%) chance of evening showers, showers late Saturday night,
• Mostly cloudy with AM showers, showers likely (70%) Sunday afternoon, rain and snow showers likely (70%) at night,
• Mostly cloudy with AM rain and snow showers, showers and a bit warmer Monday afternoon, evening rain and snow showers, rain and snow showers likely (70%) late Monday night,
• Mostly cloudy with AM rain and snow showers, then a good (50%) chance of showers and a bit warmer Tuesday afternoon.
• highs 49-47 warming back to 49 Tuesday lows 30-33. (seasonal averages high 54 low 41)

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

• Mostly cloudy with snow showers and cooler today (3-6 in. of snow possible), snow showers (2-4 in. of snow possible) tonight (wind chill temperature down to 0),
• Mostly cloudy and a bit cooler with snow showers likely (70%) Thursday (wind chill temperature down to -2), a good (50%) chance of evening snow showers, partly cloudy with a slight (20%) chance of snow showers late at night (wind chill temperature down to -11),
• AM clouds and sun, sunny and a bit warmer Friday afternoon (AM wind chill temperature down to -10), then mostly clear Friday night.
• snow level at the surface tonight through Thursday night, then free air freezing level at the surface Friday and Friday night,
• highs 24-22 warming to 30 Friday lows 11-6 warming to 13 Friday night.
• Mostly sunny and a bit warmer Saturday, partly cloudy with a good (50%) of evening snow,  snow late Saturday night,
• Mostly cloudy with snow and a bit cooler Sunday, snow likely (70%) at night,
• Mostly cloudy and a bit warmer with snow Monday, snow likely (70%) Monday night,
• Then mostly cloudy with snow likely (70%) Tuesday.
• free air freezing  level 4,500 ft. Saturday, snow level 2,500 ft. Saturday night, 2,000 ft. Sunday,at the surface Sunday night, 1,500 ft.  Monday, then 1,500 ft. Monday night and Tuesday.
• 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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