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 15 in the Good category measuring Particulate Matter.

Oakridge: The Air Quality Index is 23 in the Good category measuring Particulate Matter.

Cottage Grove: The Air Quality Index is 18 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 6 AM UNTIL 4 PM TUESDAY FOR THE NORTH OREGON COAST AND THE CENTRAL OREGON COAST.
• 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.
• A WIND ADVISORY IS IN EFFECT FROM 10 AM UNTIL 7 PM TUESDAY FOR THE LOWER COLUMBIA, THE GREATER PORTLAND METRO AREA, THE CENTRAL WILLAMETTE VALLEY, AND THE SOUTH WILLAMETTE VALLEY.
• A HIGH WIND WARNING IS IN EFFECT FROM 7 AM UNTIL 4 PM TUESDAY FOR THE SOUTH CENTRAL OREGON COAST, THE CURRY COUNTY COAST.
• A WIND ADVISORY IS IN EFFECT FROM 10 AM UNTIL 4 PM TUESDAY FOR JACKSON COUNTY.
• A WIND ADVISORY IS IN EFFECT FROM 10 AM UNTIL 10 PM TUESDAY FOR THE KLAMATH BASIN, 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:

• Mostly cloudy 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 45 mph), a good (50%) chance of evening showers, patchy fog with a slight (20%) chance of showers late Tuesday night and windy (Wind: SW 20-25 mph gusts to 40 mph decreasing to S 10-15 mph late at night),
• Patchy AM fog, mostly cloudy and a bit warmer with a slight (20%) chance of rain Wednesday afternoon, evening rain, showers late Wednesday night,
• Mostly cloudy showers likely (70%) and a bit cooler Thursday, then a good (50%) chance of showers Thursday night.
• lows 45-40 warming to 43 Wednesday night and Thursday night highs near 58.
• Rain and a bit cooler Friday and Friday night,
• Mostly cloudy with rain likely (70%) and a bit warmer Saturday, rain Saturday night, then rain likely (70%) Sunday through Monday.
• highs 55-58 cooling to 53 Thursday lows 45-43. (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:

• Cloudy with rain this evening, a (40%) chance of rain late tonight (under 0.10 in. of rain possible),
• Mostly cloudy with a slight (20%) chance of AM rain, rain Tuesday afternoon (0.15 in. of rain possible), partly cloudy with a (30%) chance of evening showers, just partly cloudy Tuesday night and Wednesday, increasing clouds with rain likely (70%) late Wednesday night,
• Then mostly cloudy with a good (50%) chance of showers and cooler Thursday and Thursday night.
• lows 45-42 warming to 46 Wednesday night cooling to 44 Thursday night highs 58-65 cooling to 62 Thursday.
• Mostly cloudy with rain Friday through Saturday night,
• Then mostly cloudy with rain likely (60%) and a bit cooler Sunday through Monday.
• highs 60-54 lows 46-42. (seasonal averages high 56 low 38).

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

• Cloudy with evening rain likely (70%), a good (50%) chance of rain late tonight (under 0.10 in. of rain possible),
• Mostly cloudy with a good (50%) chance of AM coastal rain and a bit cooler with rain and a slight (20%) chance of coastal thunderstorms Tuesday afternoon while a slight (20%) chance of inland AM rain and inland rain Tuesday afternoon (0.45 in. of rain possible) and windy (Wind: SW 25-35 at the shore while SW 15-25 mph inland), partly cloudy with a (30%) chance of evening showers, just mostly cloudy and breezy (Wind: SW 15-25 mph at night),
• Partly cloudy Wednesday AM at the shore and mostly cloudy with a (30%) chance of rain in the afternoon while mostly cloudy inland in the AM and partly cloudy with a slight (20%) chance of rain Wednesday afternoon, mostly cloudy with rain coastal rain Wednesday night while evening rain inland and rain likely (70%) late at night inland,
• Then mostly cloudy and a bit cooler with a good (50%) chance of showers Thursday and Thursday night.
• lows 49-44 warming to 50 Wednesday night cooling to 48 Thursday night highs 58-62 cooling back to 58 Thursday.
• Mostly cloudy with rain Friday through Sunday night,
• Rain likely (70%) Monday.
• highs 56-58 cooling to 53 Sunday and Monday lows 49-47. (seasonal averages high 54 low 41).

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Forecast for the Cascades in Lane County:

• 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 (0.50 in. of rain possible) and windy (Wind: SW 20-30 mph gusts to 55 mph), evening rain and snow showers, colder with a slight (20%) chance of rain and snow showers late Tuesday night (0.25 in. of rain possible, 1 in. of snow possible) and breezy (Wind: SW 15-25 mph gusts to gusts to 40 mph decreasing to SW 5-15 mph late at night),
• Partly cloudy and a bit warmer Wednesday, becoming mostly cloudy with rain at night,
• Mostly cloudy and cooler with rain and snow showers Thursday AM, a good (50%) chance of afternoon showers, then a (40%) chance of rain and snow  showers Thursday night.
• snow level 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, snow level 8,000 ft. falling to 6,000 ft. Wednesday night, 4,500 ft. Thursday, then 5,000 ft. Thursday night.
• lows 33-28 warming back to 33 Wednesday night cooling to 30 Thursday night highs 49-52 cooling to 42 Thursday.
• Mostly cloudy and cooler with rain and snow likely (70%) Friday, rain likely (70%) Friday night and Saturday, rain Saturday night,
• Then mostly cloudy with rain and snow likely (70%) Sunday through Monday.
• snow level 5,000 ft. Friday, 6,000 ft. Friday night, 7,000 ft. Saturday and Saturday night, 5,500 ft. Sunday, 5,000 ft. Sunday night, then 4,500 ft. Monday.
• highs 43-36 lows 33-29.

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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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