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) took over keeping the week dry and warmer. By Friday this frontal system will be approaching the Pacific Northwest. Here comes another frontal system for your Sunday. Tuesday a frontal system brings the chance of more rain Monday night and Tuesday.

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Air Quality Index:

Eugene-Springfield: The Air Quality Index is 44in the Good category measuring Particulate Matter.

Oakridge: The Air Quality Index is 8 in the Good category measuring Particulate Matter.

Cottage Grove: The Air Quality Index is 27 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,
• Patchy AM fog, a mix of clouds and sun and a bit cooler with increasing clouds and a (40%) chance of rain Friday afternoon (0.25 in. of rain possible), mostly cloudy with evening rain, showers likely (60%) late Friday night (0.50 in. of rain possible),
• A (30%) chance of AM showers (under 0.10 in. of rain possible), a mix of clouds and sun and a bit cooler Saturday afternoon, mostly cloudy in the evening, partly cloudy with patchy fog late at night and Sunday AM, rain and bit cooler Sunday afternoon, then showers likely (70%) at night.
• lows 46-37 highs 57-52.
• A mix of clouds and sun and a bit warmer with a (40%) chance of showers Monday, mostly cloudy with a (40%) chance of rain Monday night,
• Mostly cloudy and a bit warmer with a (30%) chance of rain Tuesday, partly cloudy with a (40%) chance of rain at night,
• A mix of clouds and sun with a slight (20%) chance of rain Wednesday, then mostly cloudy with a (40%) chance of rain Wednesday night and Thursday.
• high 57-60 cooling back to 57 Thursday lows 38-44. (seasonal averages high 53 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,
• Mostly cloudy with patchy AM fog, a bit cooler with rain Friday afternoon and evening (0.20 in. of rain possible), showers likely (70%) late Friday night (0.35 in. of rain possible),
• Mostly cloudy with a slight (20%) chance of AM showers, mostly cloudy and cooler Saturday afternoon, mostly cloudy with patchy fog late Saturday night and Sunday AM, rain and a bit cooler in the afternoon, then a good (50%) chance of showers late Sunday night.
• lows near 46 highs 70-60 warming to 62 Saturday.
• Mostly cloudy and a bit warmer Monday, cloudy with a (40%) chance of rain Monday night and Tuesday, mostly cloudy with a (30%) chance of rain Tuesday night,
• Just partly cloudy and a bit warmer Wednesday, mostly cloudy with a (40%) chance of rain Wednesday night and Thursday AM, then rain likely (60%) and a bit cooler Thursday afternoon.
• highs 56-66 lows 39-43. (seasonal averages high 55 low 38).

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

• Partly cloudy tonight,
• Mostly cloudy with a slight (20%) chance of coastal rain Friday AM, rain and a bit cooler in the afternoon (0.30 in. of rain possible), coastal evening rain and a slight (20%) chance of thunderstorms while evening rain inland and a good (50%) chance of inland showers late Friday night (0.30 in. of rain possible),
• Mostly cloudy with a slight (20%) chance of AM coastal showers, just mostly cloudy and a bit cooler Saturday afternoon, a slight (20%) chance of coastal rain late at night,
• Mostly cloudy and a bit cooler with rain Sunday, partly cloudy with evening showers likely (60%), then mostly cloudy with a good (50%) chance of showers late Sunday night.
• lows 48-43 highs 60-56.
• Mostly cloudy and a bit warmer Monday, cloudy with a good (50%) chance of rain at night and Tuesday AM, rain likely (70%) and warmer Tuesday afternoon, mostly cloudy with a (40%) chance of rain Tuesday night,
• Just partly cloudy and a bit warmer Wednesday, mostly cloudy with a (40%) chance of rain at night,
• Then mostly cloudy and a bit cooler with rain likely (70%) Thursday.
• highs 60-64 cooling to 59 Thursday lows 48-50. (seasonal averages high 53 low 41).

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Forecast for the Cascades in Lane County:

• Mostly clear tonight,
• AM clouds and sun with a slight (20%) chance of rain, mostly cloudy with a good (50%) chance of rain Friday afternoon (0.25 in. of rain possible), rain Friday night (0.50 in. of rain possible),
• Mostly cloudy with a good (50%) chance of rain and snow showers Saturday AM, a slight (20%) chance of rain and snow showers and cooler in the afternoon, just mostly cloudy at night,
• Mostly cloudy with rain likely (70%) Sunday AM, rain and snow in the afternoon, then rain and snow showers likely (70%) late at night.
• free air freezing level 12,000 ft. tonight, snow level 8,000 ft. Friday, 7,000 ft. falling to 6,000 ft. late Friday night, 5,000 ft. Saturday, free air freezing level 7,500 ft. Saturday night, 6,000 ft. Sunday, then 3,000 ft. Sunday night.
• lows 34-24 highs 52-42.
• A mix of clouds and sun and a bit cooler with a (40%) chance of rain and snow showers Monday, mostly cloudy with a (40%) chance of rain and snow at night,
• A mix of clouds and sun and a bit warmer with a (30%) chance of rain Tuesday, partly cloudy with a (40%) chance of rain Tuesday night,
• A mix of clouds and sun with a slight (20%) chance of rain Wednesday, mostly cloudy with a (40%) chance of rain at night,
• Then a (40%) chance of rain and snow and a bit cooler Thursday.
• snow level  3,000 ft. Monday, 4,500 ft. Monday night, 6,500 ft. Tuesday, 6,000 ft. Tuesday night, 5,500 ft.  Wednesday, 7,000 ft. Wednesday night, then 5,500 ft. Thursday.
• highs 42-46 cooling back to 42 Wednesday lows 27-33.

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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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