Here is my new weekly weather quiz question. What is  a “Parapet Wall?” (No it’s not surrounding a castle.) 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) has taken over keeping the week dry and warmer. By Friday this frontal system will be approaching the Pacific Northwest. And, of course, a new frontal system will be located behind that one.

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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 4 in the Good category measuring Particulate Matter.

Cottage Grove: The Air Quality Index is 11 in the Good category measuring Particulate Matter.

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

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Advisories: None At This Time.

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

• Partly cloudy with patchy fog late tonight,
• Mostly cloudy with areas of AM fog, mostly sunny Tuesday afternoon, partly cloudy at night,
• Mostly cloudy and a bit warmer Wednesday, partly cloudy in the evening, mostly cloudy with patchy fog late Wednesday night,
• Patchy AM fog, a mix of clouds and sun and a bit warmer Thursday afternoon, then partly cloudy with patchy fog late Thursday night.
• lows 32-43 highs 55-60.
• Patchy AM fog, partly cloudy and a bit warmer with a slight (20%) chance of rain Friday, becoming mostly cloudy with rain likely (70%) Friday night,
• Cloudy with a good (50%) chance of showers and a bit cooler Saturday, partly cloudy with a slight (20%) chance of showers at night,
• Mostly cloudy and a bit warmer with a good (50%) rain Sunday, then mostly cloudy with a good (50%) chance of showers Sunday night and Monday (a bit cooler).
• high 62-57 warming to 59 Sunday cooling to 56 Monday lows 47-43. (seasonal averages high 52 low 35).

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Home Wood Heating Advisory:

Eugene-Springfield: Yellow – Caution is advised.

Oakridge: Yellow – Caution is advised.

*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 clear with patchy fog late tonight and Tuesday AM, sunny and a bit warmer in the afternoon, partly cloudy in the evening, mostly cloudy with patchy fog late Tuesday night and Wednesday AM, mostly cloudy in the afternoon, partly cloudy with patchy fog late Wednesday night,
• Then patchy AM and late night fog, partly cloudy and a bit warmer Thursday and Thursday night.
• lows 36-46 highs 60-67.
• Patchy AM fog, mostly cloudy and a bit cooler with a slight (20%) chance of showers Friday afternoon, rain Friday night,
• Mostly cloudy with showers likely (70%) and cooler Saturday, a (30%) chance of showers at night,
• Showers likely (70%) and a bit warmer Sunday, the mostly cloudy with a (40%) chance of showers Sunday night and Monday (a bit cooler).
• highs 64-58 warming to 60 Sunday cooling to 58 Monday lows 47-43 warming to 45 Sunday night. (seasonal averages high 55 low 38).

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

• Mostly clear tonight,
• Sunny and a bit warmer Tuesday, partly cloudy in the evening, mostly cloudy at night with a slight (20%) chance of coastal rain late tonight,
• Mostly cloudy and a bit cooler with a slight (20%) chance of rain coastal showers Wednesday, mostly cloudy in the evening, partly cloudy late Wednesday night,
• Mostly cloudy in the AM, then partly cloudy and a bit cooler Thursday afternoon and Thursday night.
• lows 39-46 highs 67-62.
• Patchy AM fog, mostly cloudy and a bit cooler with a slight (20%) chance  of showers Friday, rain Friday night,
• Mostly cloudy with a (40%) chance of showers and a bit cooler Saturday and at night,
• Mostly cloudy with showers likely (70%) Sunday, then mostly cloudy with a (40%) chance of showers Sunday night and Monday (a bit warmer).
• highs 59-56 warming to 58 Monday lows near 48. (seasonal averages high 53 low 40).

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Forecast for the Cascades in Lane County:

• Mostly clear tonight,
• Mostly sunny and a bit warmer Tuesday, partly cloudy at night,
• A mix of clouds and sun and slightly warmer Wednesday, mostly cloudy in the evening,  just partly cloudy late Wednesday night,
• A mix of clouds and sun and a bit warmer Thursday, then partly cloudy at night.
• free air freezing level 5,000 ft. tonight, 11,000 ft. Tuesday, 10,000 ft. Tuesday night, 8,000 ft. Wednesday, 9,000 ft. Wednesday night, 10,000 ft. Thursday, then 11,000 ft. Thursday night.
• lows 24-38 highs 46-52.
• Partly cloudy  Friday, becoming mostly cloudy with rain likely (60%) Friday night,
• A good (50%) chance of rain and snow showers and a bit cooler Saturday, a slight (20%) chance of rain and snow showers at night,
• Mostly cloudy and a bit warmer with a (40%) chance of rain Sunday, a good (50%) chance of showers Sunday night,
• Then a mix of clouds and sun and a bit cooler with a good (50%) chance of rain and snow showers Monday.
• free air freezing level 10,000 ft. Friday, snow level  7,500 ft. Friday night, 5,000 ft. Saturday, 5,500 ft. Saturday night, 6,000 ft. Sunday, 7,000 ft. Sunday night, then 5,500 ft. Monday.
• highs 52-42 warming to 47 Sunday cooling to 42 Monday lows 35-33.

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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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