Here is my weekly weather quiz question for the last time. What is  a “ Penumbra?” Here is the correct answer. A Penumbra in solar-terrestrial terms, the sunspot area that may surround the darker umbra or umbrae. It consists of linear bright and dark elements radial from the sunspot umbra. I’ll have a new weekly weather quiz question for you starting Monday. 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 low pressure trough (Shaded “U” shape with blue arrows) still controls our weather and will keep the showers around as it sends another frontal system into Oregon. More storms will follow as a frontal system pushes through Wednesday. We will be visited by yet another frontal system moves in next Sunday.

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Air Quality Index:

Eugene-Springfield: The Air Quality Index is 6 in the Good category measuring Particulate Matter.

Oakridge: The Air Quality Index is 9 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).

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Advisories:

• A HIGH SURF ADVISORY IS IN EFFECT UNTIL 6 AM MONDAY FOR THE SOUTH CENTRAL OREGON COAST AND THE CURRY COUNTY COAST.
• A WINTER WEATHER ADVISORY IS IN EFFECT UNTIL 4 AM MONDAY ABOVE 3,500 FT. FOR THE EASTERN DOUGLAS COUNTY FOOTHILLS, THE SOUTH CENTRAL OREGON CASCADES, THE SOUTHERN OREGON CASCADES, THE SISKIYOU MOUNTAINS, THE KLAMATH BASIN, NORTHERN AND EASTERN KLAMATH COUNTY, AND WESTERN, CENTRAL AND EASTERN LAKE COUNTY.

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

• Mostly cloudy with showers and a slight (20%) chance of thunderstorms this evening, showers tonight (0.25 in. of rain possible, more in storms),
• Cloudy with a good (50%) chance of showers Monday AM, showers likely (70%) and a bit cooler with a slight (20%) chance of thunderstorms in the afternoon (0.10 in. of rain possible, more in storms), mostly cloudy with a good (50%) chance of evening showers, partly cloudy with a slight (20%) chance of showers late Monday night,
• Patchy AM fog, increasing clouds with rain and a bit cooler Tuesday afternoon through Wednesday night (a bit warmer Wednesday).
• lows 40-36 warming to 44 Tuesday night and Wednesday night highs 53-48 warming to 55 Wednesday.
• Mostly cloudy with rain and a bit warmer Thursday, rain likely (60%) Thursday night,
• Showers likely (70%) and a bit cooler Friday, a good (50%) chance of showers at night,
• Then mostly cloudy with showers likely (60%) Saturday through Sunday.
• highs 56-54 lows near 42. (seasonal averages high 55 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:

• Mostly cloudy with evening showers, a good (50%) chance of showers late tonight (0.10 in. of rain possible, snow level 3,500 ft. falling to 3,000 ft. late tonight),
• Mostly cloudy with a good (50%) chance of AM showers, showers likely (70%) Monday afternoon (snow level 3,000 ft.), a slight (20%) chance of evening showers, partly cloudy late Monday night,
• Mostly cloudy with patchy fog and a slight (20%) chance of AM rain, then rain Tuesday afternoon (a bit cooler) through Wednesday night (a bit warmer Wednesday.
• lows 39-36 warming to 46 Wednesday night highs 54-59.
• Mostly cloudy with rain and a bit cooler Thursday, rain likely (70%) Thursday night,
• Rain and a bit cooler Friday, rain likely (70%) at night,
• Mostly cloudy with rain Saturday and Saturday night,
• Then rain likely (70%) Sunday.
• highs 58-56 lows near 43. (seasonal averages high 57 low 39).

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

• Mostly cloudy with coastal showers and a slight (20%) chance of thunderstorms tonight while inland showers and a slight (20%) chance of thunderstorms this evening with inland showers likely (60%) late tonight (0.25 in. of rain possible) (Wind: SW 15-25 mph decreasing to SW 10-15 mph late tonight),
• AM coastal showers and a slight (20%) chance of thunderstorms while inland AM showers likely (70%), showers likely (70%) and a bit cooler Monday afternoon with a slight (20%) chance of thunderstorms, partly cloudy with a (40%) chance of evening coastal showers while a slight (20%) chance of inland evening showers and partly cloudy inland late Monday night,
• Mostly cloudy with patchy fog and a slight (20%) chance of AM rain Tuesday, rain and a bit cooler in the afternoon and Tuesday night,
• Then rain, possibly heavy at times, and windy and warmer Wednesday and Wednesday night.
• lows 44-40 warming to 49 Tuesday night and Wednesday night highs 53-50 warming to 59 Wednesday.
• Mostly cloudy with rain, possibly heavy at times, and windy Thursday, rain Thursday night and Friday, rain likely (60%) Friday night,
• Then rain Saturday through Sunday.
• highs 58-56 lows near 46. (seasonal averages high 54 low 41).

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Forecast for the Cascades in Lane County:

• Mostly cloudy with rain and snow showers tonight (0.25 in. of rain possible, 1-3 in. of snow possible),
• Mostly cloudy and a bit colder with snow showers likely (70%) Monday (0.25 in. of rain possible, 2 in. of snow possible), evening rain and snow showers likely (70%), partly cloudy with a slight (20%) chance of rain and snow showers late Monday night (0.10 in. of rain possible, 1 in. of snow possible),
• Mostly cloudy with rain and snow Tuesday afternoon through Wednesday (a bit warmer Wednesday), evening rain, then rain and snow late at night and breezy.
• snow level 4,000 ft. tonight, 3,000 ft. Monday and Monday night, 2,500 ft. Tuesday, 4,000 ft. Tuesday night, then 6,000 ft. Wednesday and Wednesday night.
• lows 27-20 warming to 30 Tuesday and Wednesday night highs 35-44.
• Mostly cloudy with rain and snow and a bit cooler Thursday and at night,
• Rain and snow showers likely (70%) Friday, mostly cloudy with a good (50%) chance of  rain and snow showers Friday night and Saturday, rain and snow Saturday night,
• Then rain and snow likely (60%) Sunday.
• snow level 5,000 ft. Thursday through Friday night, 4,500 ft. Saturday, 4,000 ft. Saturday night, then 3,000 ft. Sunday.
• highs 42-39 lows near 28.

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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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