Here is my new weekly weather quiz question. What is a “Theodolite?” 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. Good luck.

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An upper level low (Shaded “U” Shape with blue arrows) will be moving West to East north of us giving us some slightly cooler weather. It looks like a frontal system will be heading our way Wednesday with very little or no effect on our weather except to hold the temperatures down. A high pressure ridge (“Arch” shape with blue arrows) takes over to bring more sunshine and warmer temperatures again.

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Air Quality Index:

Eugene-Springfield: The Air Quality Index is 30 in the Good category measuring Particulate Matter.

Oakridge: The Air Quality Index is 18 in the Good category measuring Particulate Matter.

Cottage Grove: The Air Quality Index is 17 in the Good category measuring Particulate Matter.

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

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Advisories:

• A Blue-Green Algae health advisory in effect for Odell Lake in Lane County has been lifted. Water testing has confirmed the presence of blue-green algae and the toxins they produce. People should avoid swallowing water while swimming or inhaling water droplets as a result of high-speed water activities, such as water skiing or power boating, in areas where blooms are identified. Although toxins are not absorbed through the skin, people who have skin sensitivities may experience a puffy, red rash at the affected area.
• A Blue-Green Algae health advisory remains in effect for Howard Bay (sometimes called Howards Bay or Howard’s Bay) in Upper Klamath Lake ONLY. People should avoid swallowing water while swimming or inhaling water droplets as a result of high-speed water activities, such as water skiing or power boating, in areas where blooms are identified. Although toxins are not absorbed through the skin, people who have skin sensitivities may experience a puffy, red rash at the affected area.

 

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

•  Sunny and a bit cooler today, clear tonight,
• Sunny Tuesday, clear at night,
• Sunny and a bit cooler Wednesday, clear Wednesday night.
• highs 90-87 lows 53-55.
• Sunny and warmer (Hot!) Thursday and Friday, clear both nights,
• Sunny and a bit cooler Saturday and Sunday, clear Saturday night.
• highs 95-98 cooling to 90 Sunday lows near 56. (seasonal averages high 83 low 51)

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Eugene-Springfield Pollen Count:

Grass………. Low (3)

Trees………. Low (0)

Last Counted: 8/11/16

Data Courtesy of Oregon Allergy Associates.

The Grass and Tree Pollen season is officially over now.

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Forecast for Roseburg:

• Sunny and a bit cooler this afternoon, partly cloudy tonight,
• Partly cloudy Tuesday AM, sunny and a bit cooler in the afternoon, mostly clear Tuesday night,
• Then sunny and a bit warmer Wednesday, clear at night.
• highs near 92 lows near 58.
• Then sunny and a bit warmer Thursday, Friday, (a bit cooler) Saturday and Sunday, clear each night.
• highs 90-96 lows 63-59. (seasonal averages high 85 low 56)

 

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

• Mostly cloudy patchy coastal fog this AM, sunny this afternoon, mostly clear in the evening and cloudy with patchy coastal fog late tonight while mostly clear inland in the evening and cloudy late at night,
• AM clouds, mostly sunny Wednesday afternoon, mostly cloudy in the evening, then mostly cloudy late Wednesday night.
• highs near 65 lows near 54.
• Mostly sunny and a bit warmer Thursday and Friday, mostly clear Thursday night,partly cloudy Friday night,
• Then partly cloudy Thursday through Sunday.
• highs 69-73 cooling to 65 Sunday lows 55-53. (seasonal averages high 65 low 53)

 

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Forecast for the Cascades in Lane County:

• Sunny today, Tuesday and Wednesday, clear each night,
• free air freezing level 15,000 ft. today through Wednesday night.
• highs near 80 lows 50-52 cooling back to 48 Wednesday night.
• Sunny and a bit warmer Thursday and Friday, clear both nights,
• Sunny and a bit cooler Saturday and Sunday, clear at night.
• free air freezing level 15,000 ft. Thursday, then 16,000 ft. Thursday night through Sunday.
• highs 84-78 lows 52-50.

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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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