Here is my new weekly weather quiz question. What is a “Thalweg?” 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 “circular” shape with blue arrows) moves in cooling us a bit more, then brings the slight chance for showers for today and Tuesday. A frontal system will be pushing through the Pacific Northwest by next Sunday night. You may just want to check out this year’s Perseid Meteor Shower which peaks from Thursday August 10th through Sunday August 13th. It is predicted that you could see up to 200 “shooting stars” per hour from debris from the comet Swift-Tuttle. Best viewing is late at night to before sunrise. Make sure you are out far enough away from the city lights so the sky looks darker a and the meteorites will be more easily seen.

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Air Quality Index:

Eugene-Springfield: The Air Quality Index is 23 in the Good category measuring Ozone.

Oakridge: The Air Quality Index is 7 in the Good category measuring Particulate Matter.

Cottage Grove: The Air Quality Index is 24 in the Good category measuring Ozone.

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

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Advisories:

• A Blue-Green Algae health advisory is in effect for Odell Lake in Lane County. 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:

• A mix of clouds and sun with a slight (20%) chance of showers this afternoon, partly cloudy this evening, mostly cloudy with a slight (20%) chance of showers late tonight,
• A mix of clouds and sun with a slight (20%) chance of showers Tuesday, just partly cloudy Tuesday night and Wednesday AM, mostly sunny and a bit warmer Wednesday afternoon, then clear at night.
• highs 77-86 lows 57-53.
• Sunny and a bit warmer Thursday, clear at night,
• Then mostly sunny a bit warmer Friday, mostly clear at night,
• Mostly sunny and a bit cooler Saturday and Sunday, partly cloudy Saturday night.
• highs 90-80 lows near 56. (seasonal averages high 84 low 52)

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Eugene-Springfield Pollen Count:

Grass………. Low (0)

Trees………. Low (0)

Last Counted: 8/5/16

Data Courtesy of Oregon Allergy Associates.

The Grass and Tree Pollen season is officially over now.

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Forecast for Roseburg:

• Partly cloudy this afternoon, mostly cloudy with a slight (20%) chance of showers late tonight,
• Cloudy with a slight (20%) chance of AM rain, partly cloudy and a bit cooler Tuesday afternoon and at night,
• Partly cloudy in the AM, sunny and a bit warmer Wednesday afternoon, then mostly clear at night.
• highs 80-86 lows 60-57 warming back to 60 Wednesday night.
• Mostly sunny and a bit warmer Thursday, mostly clear at night,
• Sunny and a bit warmer Friday, mostly clear Friday night,
• Then mostly sunny but a bit cooler Saturday and Sunday, mostly clear Saturday night.
• highs 94-96 cooling to 83 Sunday lows 60-58. (seasonal averages high 86 low 56)

 

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

• Mostly cloudy this afternoon, mostly cloudy with a slight (20%) chance of rain late tonight and Tuesday AM, mostly cloudy in the afternoon, partly cloudy in the evening,  partly cloudy late Tuesday night,
• Partly cloudy Wednesday AM, mostly sunny in the afternoon, then mostly clear Wednesday night.
• highs near 66 lows 57-55.
• Mostly sunny Thursday and Friday, mostly clear Thursday night, partly cloudy Friday night,
• Then partly cloudy Saturday through Sunday.
• highs near 66 lows near 55. (seasonal averages high 65 low 53)

 

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Forecast for the Cascades in Lane County:

• Partly cloudy this afternoon, mostly cloudy with a slight (20%) chance of showers late tonight and Tuesday AM, partly cloudy in the afternoon and Tuesday night,
• AM clouds, mostly sunny and a bit warmer Wednesday afternoon, then mostly clear Wednesday night.
• snow level above 8,000 ft. tonight and Tuesday, free air freezing level 12,000 ft. Tuesday night and Wednesday, then 14,000 ft. Wednesday night.
• highs 62-60 warming to 75 Wednesday lows 44-47.
• Sunny and a bit warmer Thursday and Friday, mostly clear at night,
• Then mostly sunny Saturday and Sunday, mostly clear Saturday night.
• free air freezing level 15,000 ft. Thursday, 16,000 ft. Thursday night, 15,000 ft. Friday, 16,000 ft. Friday night, 15,000 ft. Saturday, 14,000 ft. Saturday night, then 13,000 ft. Sunday.
• highs 82-72 lows 52-47.

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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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