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 moving to the east allowing upper level high pressure (Shaded “Arch” shape with blue arrows) to take over returning the sunshine and warmer temperatures. 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 19 in the good category measuring Ozone.

Oakridge: The Air Quality Index is 5 in the Good category measuring Particulate Matter.

Cottage Grove: The Air Quality Index is 19 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 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 cloudy and a bit warmer with sun peeks this afternoon and evening, partly cloudy late tonight,
• AM clouds, mostly sunny Wednesday afternoon, partly cloudy at night and Thursday, mostly cloudy with a (30%) chance of showers Thursday night.
• highs 75-83 lows near 53.
• Mostly cloudy Friday AM, partly cloudy in the afternoon, mostly clear at night,
• Mostly sunny Saturday, mostly clear Saturday night,
• Sunny Sunday, mostly clear at night,
• Then mostly sunny Monday.
• highs near 83 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:

• Mostly cloudy and a bit warmer this afternoon and evening, just partly cloudy late tonight,
• Mostly cloudy Wednesday AM, partly cloudy and a bit warmer in the afternoon and evening, partly cloudy late Wednesday night,
• Mostly cloudy and a bit cooler Thursday, cloudy with a slight (20%) chance of showers Thursday night.
• highs 77-85 cooling back to 77 Thursday lows near 56.
• AM clouds, mostly sunny and a bit warmer Friday afternoon, mostly clear at night,
• Mostly sunny Saturday, Sunday and Monday, mostly clear each night.
• highs 82-87 lows near 56. (seasonal averages high 85 low 57)

 

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

• Mostly cloudy this afternoon and tonight with a slight (20%) chance of coastal showers late Tuesday night,
• Mostly cloudy Wednesday afternoon, partly cloudy in the evening, mostly cloudy late at night,
• Cloudy Thursday, cloudy with a (30%) chance of showers Thursday night.
• highs 67-64 lows near 55.
• AM clouds, partly cloudy Friday afternoon, partly cloudy Friday night,
• Mostly sunny Saturday, Sunday and Monday, mostly clear each night.
• highs 66-64 lows 53-55. (seasonal averages high 65 low 53)

 

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Forecast for the Cascades in Lane County:

• Mostly cloudy with a slight (20%) chance of showers and thunderstorms and a bit warmer this afternoon, mostly cloudy with a slight (20%) chance of evening showers and thunderstorms, partly cloudy with a slight (20%) chance of showers late tonight,
• Mostly cloudy in the AM, mostly sunny and a bit warmer Wednesday afternoon, partly cloudy at night and  Thursday, then mostly cloudy with a (30%) chance of showers Thursday night.
• snow level above 8,000 ft. today and tonight, free air freezing level 11,000 ft. Wednesday, 13,000 ft. Wednesday night and Thursday, then above 8,000 ft. Thursday night.
• highs 65-70 lows 42-44.
• Mostly cloudy in the AM, mostly sunny and a bit warmer Friday afternoon, clear at night,
• Mostly sunny and a bit warmer Saturday, clear Saturday night,
• Sunny and a bit warmer Sunday, clear at night,
• Then mostly sunny and a bit cooler Monday.
• free air freezing level 13,000 ft. Friday, 14,000 ft. Friday night through Sunday night, then 15,000 ft. Monday.
• highs 73-70 warming to near 75 Monday lows near 44.

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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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