Here is my weekly weather quiz question for the last time. What are “Striations?” Here is the correct answer. Striations are Grooves or channels in cloud formations, arranged parallel to the flow of air and therefore depicting the airflow relative to the parent cloud. Striations often reveal the presence of rotation, as in the barber pole or “corkscrew” effect often observed with the rotating updraft of a Low Precipitation (LP) storm. 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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Upper level high pressure (Shaded “Arch” shape with blue arrows) takes over and strengthens. Some pretty “fair” weather for the Lane County Fair that continues through Sunday. It looks like the only frontal system to move toward the Pacific Northwest will be to our North next Saturday.

 

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Air Quality Index:

Eugene-Springfield: The Air Quality Index is 28 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 32 in the Good category measuring Ozone.

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

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Advisories:

• A Public Health Advisory for higher-than-normal levels of fecal bacteria in ocean waters at D River Beach, located in Lincoln county has been LIFTED. Officials do recommend that people  stay away from pools of water on the beach and runoff from those pools that are frequented by birds.
• A Blue-Green Algae health advisory remains 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.

 

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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 today, Sunday and Monday, clear each night,
• highs 85-88 lows 54-56.
• Then sunny and a bit warmer Tuesday, Wednesday, Thursday and Friday, clear each night.
• highs 88-93 lows 55-60. (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.

The Grass and Tree Pollen season is officially over now.

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Forecast for Roseburg:

• AM clouds, sunny and a bit warmer today, Sunday and Monday, clear tonight and Sunday night, partly cloudy Monday night.
• highs 85-88 lows 56-60.
• Partly cloudy and a bit warmer Tuesday, mostly clear at night,
• Mostly sunny and a bit warmer Wednesday and Thursday, mostly clear both nights,
• Partly cloudy in the AM, then mostly sunny and a bit warmer Friday afternoon.
• highs 88-96 lows 57-62. (seasonal averages high 86 low 57)

 

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

• AM clouds, sunny today, clear tonight,
• Partly cloudy Sunday AM, sunny in the afternoon, mostly clear Sunday night,
• Partly cloudy in the AM, sunny Monday afternoon, then partly cloudy Monday night.
• highs near 65 lows 56-58.
• Partly cloudy and a bit warmer Tuesday through Friday.
• highs 66-68 lows 55-58. (seasonal averages high 65 low 53)

 

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Forecast for the Cascades in Lane County:

• Sunny and a bit warmer today, Sunday and Monday, clear each night.
• free air freezing level 14,000 ft. today through Sunday, 15,000 ft. Sunday night, 14,000 ft. Monday, then 16,000 ft. Monday night.
• highs 75-78 lows 46-50.
• Then sunny and a bit warmer Tuesday, Wednesday, Thursday and Friday, clear each night.
• free air freezing level 16,000 ft. Tuesday through Friday.
• highs 77-82 lows 49-55.

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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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