Here is my new weekly weather quiz question. What are “Striations?” 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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Upper level low pressure (Shaded “U” shape with blue arrows) is remaining in position offshore while upper level high pressure (Shaded “Arch” shape with blue arrows) strengthens over the Great Basin to the South and East of us. Some pretty “fair” weather for the Lane County Fair that runs today through Sunday. It looks like the only frontal system to approach the Pacific Northwest will be to our North next Monday.

 

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Air Quality Index:

Eugene-Springfield: The Air Quality Index is 22 in the good category measuring Ozone.

Oakridge: The Air Quality Index is 10 in the Good category measuring Particulate Matter.

Cottage Grove: The Air Quality Index is 18 in the Good category measuring Ozone.

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

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Advisories:

• A Public Health Advisory is in effect for higher-than-normal levels of fecal bacteria in ocean waters at D River Beach, located in Lincoln county. Visitors should avoid wading in nearby creeks, pools of water on the beach, or in discolored water, and stay clear of water runoff flowing into the ocean.
• A Blue-Green Algae health advisory remins in effect for Howard Bay (sometimes called Howards Bay or Howard’s Bay) in Upper Klamath Lake. It now includes all of Agency and Upper Klamath Lakes. 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 HAS BEEN LIFTED for the Metolius Arm of Lake Billy Chinook from Perry South Campground to and including the area around Three Rivers Marina, located about 12 miles Southwest of Madras in Jefferson County. It also includes the Crooked River Arms. Tests prove that the toxin levels have dropped to a safe level for humans, but pets still should be kept away from the water at this time.

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

• Mostly sunny and a bit warmer this afternoon, partly cloudy tonight,
• Partly cloudy with a slight (20%) chance of showers and a bit cooler Thursday afternoon and evening, mostly cloudy with a slight (20%) chance of showers late Thursday night,
• Mostly cloudy Friday AM, a mix of clouds and sun and a bit warmer in the afternoon, then mostly clear at night.
• highs 82-80 warming back to 82 Friday lows 54-52.
• Mostly sunny and a bit warmer Saturday, clear Saturday night,
• Sunny and a bit warmer Sunday, mostly clear at night,
• Then mostly sunny and a bit warmer Monday and Tuesday, mostly clear Monday night.
• highs 82-85 lows 53-55. (seasonal averages high 84 low 52)

 

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Eugene-Springfield Pollen Count:

Grass………. Low (2)

Trees………. Low (0)

Last Counted: 7/18/16

Data Courtesy of Oregon Allergy Associates.

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Forecast for Roseburg:

• Partly cloudy and a bit warmer this afternoon, mostly clear this evening, partly cloudy late tonight,
• Mostly cloudy with a slight chance of AM light rain and drizzle, a bit cooler with a slight (20%) chance of showers Thursday afternoon and at night,
• AM clouds, mostly sunny and a bit warmer Friday afternoon, then clear at night.
• highs 85-75 warming to 82 Friday lows 57-55.
• Sunny and a bit warmer Saturday, Sunday, Monday and Tuesday, clear each night.
• highs 85-87 lows near 56. (seasonal averages high 86 low 57)

 

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

• Mostly cloudy today, partly cloudy this evening, mostly cloudy with a slight (20%) chance of light rain and drizzle late tonight and Thursday AM, a slight (20%) chance of showers in the afternoon and Thursday night,
• AM clouds, mostly sunny and a bit warmer Friday afternoon, then clear Friday night.
• highs 64-66 lows 56-54.
• Sunny Saturday, Sunday, Monday and Tuesday, clear each night.
• highs near 64 lows near 55. (seasonal averages high 65 low 53)

 

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Forecast for the Cascades in Lane County:

• Mostly sunny  and a bit warmer this afternoon, partly cloudy tonight,
• Partly cloudy Thursday and a bit cooler with a (30%) chance of showers and thunderstorms in the afternoon and evening, a (30%) chance of showers at night,
• Mostly cloudy Friday AM, mostly sunny and a bit warmer in the afternoon, breezy in the evening, mostly clear at night.
• free air freezing level 12,000 ft. today, 13,000 ft. tonight, snow level above 8,000 ft. Thursday, 10,000 ft. Thursday night, free air freezing level 12,000 ft. Friday, 11,000 ft. Friday afternoon, then 14,000 ft. Friday night.
• highs 72-68 warming back to 72 Friday lows near 44.
• Sunny and a bit warmer Saturday, Sunday, Monday and Tuesday, mostly clear each night.
• free air freezing level 14,000 ft. Saturday, then 15,000 ft. Saturday night through Tuesday.
• highs 72-80 lows 44-52.

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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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