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) will hang around through the middle of the week and then move 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 23 in the good category measuring Particulate Matter.

Oakridge: The Air Quality Index is 13 in the Good category measuring Particulate Matter.

Cottage Grove: The Air Quality Index is 23 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 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 with a slight (20%) chance of showers (under 0.10 in. of rain possible) today through Tuesday AM (under 0.10 in. of rain possible), mostly cloudy and a bit warmer Tuesday afternoon through Wednesday AM, then partly cloudy afternoon and Wednesday night.
• highs 75-82 lows 57-53.
• Partly cloudy Thursday AM, mostly sunny and a bit warmer in the afternoon, mostly clear at night,
• Then mostly sunny Friday, Saturday and Sunday, mostly clear each night.
• highs near 83 lows near 53. (seasonal averages high 83 low 52)

 

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Eugene-Springfield Pollen Count:

Grass………. Moderate (16)

Trees………. Low (2)

Last Counted: 7/12/16

Data Courtesy of Oregon Allergy Associates.

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Forecast for Roseburg:

• Mostly cloudy with a (30%) chance of isolated showers this AM, a (30%) chance of showers and a slight (20%) chance of thunderstorms and a bit cooler  this afternoon (under 0.10 in. of rain possible), a slight (20%) chance of isolated showers tonight (under 0.10 in. of rain possible),
• Mostly cloudy with a slight (20%)  chance of AM showers, mostly cloudy and a bit warmer Tuesday afternoon and evening, just partly cloudy late Tuesday night and Wednesday AM, sunny and a bit warmer in the afternoon, then mostly clear Wednesday night.
• highs 75-82 lows near 56.
• Mostly sunny and a bit warmer Thursday and Friday, a bit cooler Saturday and Sunday, mostly clear each night.
• highs 85-87 cooling to 84 Saturday and Sunday lows near 55. (seasonal averages high 85 low 57)

 

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

• Mostly cloudy with a (30%) chance of showers today (under 0.10 in. of rain possible), a slight (20%) chance of showers tonight (under 0.10 in. of rain possible) and Tuesday AM, just mostly cloudy in the afternoon, partly cloudy in the evening, mostly cloudy late Tuesday night with a slight (20%) chance of coastal showers late at night,
• AM clouds, mostly sunny Wednesday afternoon, then partly cloudy Wednesday night.
• highs near 65 lows near 55.
• Partly cloudy Thursday through Friday, mostly clear Friday night,
• Mostly sunny Saturday, mostly clear at night,
• Partly cloudy Sunday AM, then sunny in the afternoon.
• highs near 65 lows near 55. (seasonal averages high 65 low 53)

 

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Forecast for the Cascades in Lane County:

• Mostly cloudy with a good (50%) chance of AM showers, a bit cooler with a good (50%) chance of showers and thunderstorms and a bit cooler this afternoon (under 0.10 in. of rain possible, more in storms), partly cloudy with a slight (20%) chance of thunderstorms this evening, mostly cloudy with a slight (20%) chance of showers late tonight,
• Mostly cloudy Tuesday AM, a mix of clouds and and a bit warmer with a slight (20%) chance of showers and thunderstorms Tuesday afternoon, mostly cloudy with a slight (20%) chance of evening showers and thunderstorms, a slight (20%) chance of showers late Tuesday night,
• AM clouds and sun, mostly sunny Wednesday afternoon, then mostly clear Wednesday night.
• snow level above 8,000 ft. today through Tuesday, free air freezing level 11,000 ft. Tuesday night, 11,000 ft. rising to 12,000 ft. Wednesday, then 12,000 ft. rising to 13,000 ft. Wednesday night.
• highs 62-69 lows near 43.
• Partly cloudy Thursday AM, mostly sunny in the afternoon, mostly clear at night,
• Then mostly sunny and a bit warmer Friday, Saturday and Sunday, mostly clear each night.
• free air freezing level 13,000 ft. Thursday, 14,000 ft. Thursday night, then 15,000 ft. Friday through Sunday.
• highs 70-73 cooling to near 70 Sunday 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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