Here is my weekly weather quiz question for the last time. What is a “Symmetric Double Eye?”  Here is the correct answer. A Symmetric Double Eye is a concentrated ring of convection that develops outside the eye wall in symmetric, mature hurricanes. The ring then propagates inward and leads to a double-eye. Eventually, the inner eye wall dissipates while the outer intensifies and moves inward. I’ll have a new weekly weather quiz question for you starting Monday. 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 your Monday and Tuesday. A frontal system will be pushing through the Pacific Northwest by next Sunday night.

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Air Quality Index:

Eugene-Springfield: The Air Quality Index is 21 in the Good category measuring Ozone.

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

Cottage Grove: The Air Quality Index is 21 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:

• Partly cloudy this evening, mostly cloudy late tonight,
• Cloudy early, mostly cloudy with a slight (20%) chance of showers Monday afternoon, partly cloudy in the evening, mostly cloudy with a slight (20%) chance of showers late Monday night,
• 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.
• lows 53-57 cooling back to 53 Tuesday night and Wednesday night highs 77-86.
• Sunny and a bit warmer Thursday, clear at night,
• Then mostly sunny a bit warmer Friday, mostly sunny and a bit cooler Saturday and Sunday, mostly clear Friday night, 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:

• Mostly clear this evening,  mostly cloudy late tonight and Monday AM, sunny in the afternoon, partly cloudy in the evening, mostly cloudy with a slight (20%) chance of showers late Monday night,
• Cloudy with a slight (20%) chance of AM showers, partly cloudy and a bit cooler Tuesday afternoon and at night,
• Mostly sunny and a bit warmer Wednesday, then mostly clear at night.
• lows 55-60 cooling to 57 Tuesday night warming back to 60 Wednesday night highs 79-86.
• 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 92-95 cooling to 80 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:

• Partly cloudy this evening, mostly cloudy late tonight,
• Cloudy Monday AM, mostly sunny in the afternoon, mostly cloudy with a slight (20%) chance of showers late at night and Tuesday AM, partly cloudy in the afternoon and evening, mostly cloudy late Tuesday night,
• Mostly cloudy in the AM, sunny Wednesday afternoon, then mostly clear Wednesday night.
• lows 55-57 cooling back to 55 Tuesday night and Wednesday night highs near 66.
• 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 evening, mostly cloudy late tonight and Monday AM, mostly sunny Monday afternoon, partly cloudy with a slight (20%) chance of showers late Monday night and Tuesday AM, mostly sunny in the afternoon, just partly cloudy Tuesday night,
• Mostly sunny and a bit warmer Wednesday, then mostly clear Wednesday night.
• free air freezing level 11,000 ft. today, snow level above 8,000 ft. tonight through Tuesday, then free air freezing level 12,000 ft. Tuesday night,
• lows 42-47 highs 62-75.
• 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, the 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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