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 18 in the good category measuring Ozone.

Oakridge: The Air Quality Index is 9 in the Good category measuring Particulate Matter.

Cottage Grove: The Air Quality Index is 20 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 with a slight (20%) chance of showers this evening (under 0.10 in. of rain possible) and Tuesday AM, just mostly cloudy and a bit warmer Tuesday afternoon and evening, partly cloudy late at night,
• Partly cloudy Wednesday through Thursday AM, mostly sunny Thursday afternoon, then mostly clear at night.
• lows near 52 highs 75-80 cooling to 77 Thursday.
• Then mostly sunny Friday, Saturday, Sunday and Monday, mostly clear each night.
• highs near 83 lows 50-55. (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 with a slight (20%) chance of isolated showers this evening, a slight (20%) chance of rain and drizzle late tonight (under 0.10 in. of rain possible) and Tuesday AM, mostly cloudy and a bit warmer Tuesday afternoon and evening, just partly cloudy late Tuesday night,
• Mostly cloudy Wednesday AM, sunny and a bit warmer in the afternoon, mostly clear in the evening, partly cloudy late Wednesday night,
• Mostly cloudy Thursday AM, partly cloudy and a bit cooler Thursday and Thursday night.
• lows 59-56 highs 77-83 cooling back to 77 Thursday.
• Then mostly sunny and a bit warmer Friday, 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 with a slight (20%) chance of isolated showers this evening, a slight (20%) chance of rain and drizzle late tonight (under 0.10 in. of rain possible) and Tuesday AM, just mostly cloudy in the afternoon and at night with a slight (20%) chance of coastal showers late Tuesday night,
• AM clouds, mostly sunny Wednesday afternoon, partly cloudy in the evening, mostly cloudy late Wednesday night and Thursday, then just partly cloudy Thursday.
• lows near 55 highs near 65.
• Partly cloudy Friday, mostly clear Friday night,
• Mostly sunny Saturday, Sunday and Monday, mostly clear at night.
• 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 (40%) chance of showers this evening, a slight (20%) chance of showers late tonight,
• A mix of clouds and sun and a bit warmer with a slight (20%) chance of showers Tuesday, mostly cloudy with a slight (20%) chance of evening showers and thunderstorms, just partly cloudy late Tuesday night,
• Partly cloudy and a bit warmer Wednesday through Thursday AM, mostly sunny in the afternoon, then mostly clear Thursday night.
• snow level above 8,000 ft. tonight through Tuesday night, free air freezing level 12,000 ft. Wednesday, 13,000 ft. Wednesday night, 13,000 ft. falling to 12,000 ft. Thursday, then 12,000 ft. rising to 13,000 ft. Thursday night.
• lows 45-43 highs 62-66.
• Mostly sunny and a bit warmer Friday, mostly clear at night,
• Sunny and a bit warmer Saturday, clear Saturday night,
• Then mostly sunny and a bit warmer Sunday and Monday (a bit cooler), mostly clear Sunday night.
• free air freezing level 14,000 ft. Friday, 15,000 ft. Friday night through Sunday, then 16,000 ft. Sunday night and Monday.
• highs 70-79 cooling to near 77 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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