Here is my new weekly weather quiz question. What is  a “ Penumbra?”  Please remember to post your answer as a comment by clicking on “no comments /comments” in the upper right hand portion of this page under the caption, then add your comment. The first person to post the correct answer will win a week of free personalized weather forecasts tailored to your needs. The answer has to be a comment to win. An email answer will not count. Good luck.

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An upper level high pressure ridge (Shaded “Arch” shape with blue arrows) moved away to return clouds and showers with low pressure. A frontal system brought showers back Sunday. A short-lived high pressure ridge (Shaded “Arch” shape with blue arrows) stops the showers for a short time today. Another frontal system will be offshore Wednesday morning. Here comes a new frontal system by Friday morning.

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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 5 in the Good category measuring Particulate Matter.

Cottage Grove: The Air Quality Index is 15 in the Good category measuring Particulate Matter.

Data courtesy of Lane Regional Air Protection Agency (LRAPA).

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Advisories:

• A HIGH WIND WARNING IS IN EFFECT FROM 8 AM UNTIL 7 PM TUESDAY FOR THE COAST RANGE OF NORTHWEST OREGON AND THE CENTRAL OREGON COAST RANGE, THE NORTH OREGON COAST, AND THE CENTRAL OREGON COAST.
• A HIGH WIND WATCH IS IN EFFECT FROM TUESDAY MORNING THROUGH TUESDAY AFTERNOON FOR THE SOUTH CENTRAL OREGON COAST, THE CURRY COUNTY COAST, NORTHERN AND EASTERN KLAMATH COUNTY, AND CENTRAL, EASTERN AND WESTERN LAKE COUNTY.

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

• A mix of clouds and sun this afternoon, increasing clouds with rain tonight (0.25 in. of rain possible),
• Mostly cloudy with a slight (20%) chance of AM rain, rain and a bit warmer Tuesday afternoon (0.25 in. of rain possible) and windy (Wind: S 5-10 mph increasing to S 20-30 mph gusts to 40 mph), a good (50%) chance of evening showers, patchy fog with a slight (20%) chance of showers with patchy fog late Tuesday night and breezy (Wind: SW 15-25 mph gusts to 35 mph decreasing to s 5-10 mph late at night),
• Patchy AM fog, mostly cloudy and a bit warmer with a slight (20%) chance off rain Wednesday afternoon, evening rain, then showers late Wednesday night,
• highs 54-60 lows 45-38 warming back to 43 Wednesday night.
• Mostly cloudy showers likely (60%) and a bit cooler Thursday, a good (50%) chance of rain Thursday night,
• Rain Friday and Friday night,
• Mostly cloudy with rain likely (70%) Saturday, then cloudy with a good (50%) chance of rain Saturday night and Sunday.
• highs near 56 lows 43-46. (seasonal averages high 54 low 36).

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Home Wood Heating Advisory:

Eugene-Springfield: GREEN – Burning is Allowed.

Oakridge: GREEN – Burning is Allowed.

*Note: Pellet stoves may be used anytime if they produce no visible emissions.

Advisory Courtesy of Lane Regional Air Protection Agency (LRAPA).

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Forecast for Roseburg:

• Partly cloudy with a slight (20%) chance of rain this afternoon, cloudy with a (40%) chance of rain late tonight (under 0.10 in. of rain possible) and Tuesday (0.15 in. of rain possible), mostly cloudy with a  (40%) chance of showers Tuesday night,
• Partly cloudy and a bit warmer with a slight (20%) chance of rain Wednesday afternoon, evening rain, then rain likely (70%) late Wednesday night.
• highs 58-66 lows 44-47.
• Mostly cloudy with rain likely (60%) and cooler Thursday, a good (50%) chance of rain Thursday night,
• Mostly cloudy with rain Friday through Saturday night,
• Cloudy with a good (50%) chance of AM rain, then rain likely (60%) and a bit cooler Sunday afternoon.
• highs 57-60 cooling back to 57 Saturday lows 44-47. (seasonal averages high 56 low 38).

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

• Mostly cloudy and a bit warmer with a slight (20%) chance of rain this afternoon (under 0.10 in. of rain possible), becoming mostly cloudy with evening coastal rain likely (70%) a good (50%) chance of rain late tonight while a (30%) chance of inland rain tonight (under 0.10 in. of rain possible),
• Mostly cloudy with a slight (20%) chance of AM rain, coastal rain and a bit cooler Tuesday with a slight (20%) chance of thunderstorms in the afternoon while inland rain Tuesday afternoon (0.45 in. of rain possible) and windy (Wind: S 10-20 mph increasing to 25-35 by late morning at the shore while S 15-25 mph inland), a (30%) chance of evening showers, just mostly cloudy and breezy (Wind: SW 15-25 mph at night,
• Partly cloudy a (30%) chance of rain and a bit warmer Wednesday, mostly cloudy with rain Wednesday night.
• highs 60-56 warming to 62 Wednesday lows 50-45 warming back to 50 Wednesday night.
• Mostly cloudy with rain Thursday AM, rain likely (60%) and a bit cooler in the afternoon, a good (50%) chance of evening rain, rain likely (70%) late Thursday night,
• Mostly cloudy with rain Friday through Saturday night,
• Then mostly cloudy with rain likely (70%) Sunday.
• highs 57-60 cooling to 55 Sunday lows 48-50. (seasonal averages high 54 low 41).

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Forecast for the Cascades in Lane County:

• Partly cloudy and a bit warmer with a slight (20%) chance of rain and snow this afternoon, becoming cloudy with evening rain and snow, a good (50%) chance of rain late tonight (0.25 in. of rain possible),
• Mostly cloudy with rain Tuesday afternoon and windy (Wind: S 10-15 mph increasing SW 15-25 mph gusts to 50 mph in higher elevations), evening rain and snow showers, colder with a slight (20%) chance of rain and snow showers late Tuesday night and breezy (Wind: W 15-25 mph gusts to gusts to 40 mph decreasing to SW 5-15 mph gusts to 25 mph late at night),
• Partly cloudy and a bit warmer Wednesday, then becoming mostly cloudy with rain at night.
• snow level 5,000 ft. this afternoon, 5,500 ft. rising to 7,500 ft. late tonight, 7,000 ft. Tuesday, 4,000 ft. Tuesday night, free air freezing level 6,000 ft. rising to 10,000 ft. Wednesday, then snow level 8,000 ft. falling to 6,000 ft. Wednesday night.
• highs 44-52 lows 33-28 warming back to 33 Wednesday night.
• Mostly cloudy and cooler with AM rain and snow showers, a good (50%) chance of rain and snow showers Thursday, partly cloudy with a good (50%) chance of rain and snow Thursday night,
• Mostly cloudy with rain and snow likely (70%) and a bit warmer Friday, cloudy with a good (50%) chance of rain Friday night through Saturday night,
• Then rain and snow likely (70%) Sunday.
• free air freezing level 5,500 ft. Thursday, 5,000 ft. Thursday night and Friday, 6,000 ft. Friday night, 7,000 ft. Saturday and Saturday night, then 6,000 ft. Sunday.
• highs 40-43 lows 30-33.

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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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