Here is my weekly weather quiz question for the last time. What are “Stoplogs?” Here is the correct answer. Stoplogs: In hydrologic terms they are large logs, timbers or steel beams placed on top of each other with their ends held in guides on each side of a channel or conduit providing a temporary closure versus a permanent bulkhead gate. 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. 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 up returning the northwest airflow and at least a slight chance of showers to the Pacific Northwest.

 

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Air Quality Index:

Eugene-Springfield: The Air Quality Index is 23 in the good category measuring Ozone.

Oakridge: The Air Quality Index is 12 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 late tonight through Tuesday AM, mostly cloudy and a bit warmer Tuesday afternoon through Wednesday AM, then partly cloudy Wednesday night.
• lows 57-53 highs 75-82.
• 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 slight (20%) chance of drizzle isolated showers late tonight and Monday AM, a (30%) chance of showers and  a slight (20%) chance of thunderstorms and a bit cooler  Monday afternoon, a slight (20%) chance of showers at night,
• 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.
• lows 58-56 highs 75-82.
• Mostly sunny and a bit warmer Thursday and Friday, a bit cooler Saturday and Sunday, mostly clear each night.
• highs 86-84 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 slight (20%) chance of isolated showers late tonight,
• Mostly cloudy with a (30%) chance of showers Monday (under 0.10 in. of rain possible) , a slight (20%) chance of showers at night 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,
• Then partly cloudy Wednesday and Wednesday night.
• lows 57-55 highs near 65.
• 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 showers and thunderstorms tonight (0.10 in. of rain possible, more in storms),
• 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 Monday afternoon (under 0.10 in. of rain possible, more in storms), partly cloudy with a slight (20%) chance of thunderstorms in the evening, mostly cloudy with a slight (20%) chance of showers late Monday night,
• 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. tonight through Tuesday night, free air freezing level 11,000 ft. rising to 12,000 ft. Wednesday, then 12,000 ft. Wednesday night.
• lows 45-42 highs 62-69.
• 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, 13,000 ft. rising to 14,000 ft. Thursday night,  14,000 ft. rising to 15,000 ft. Friday, 15,000 ft. falling to 14,000 ft. Friday night, 14,000 ft. rising to 15,000 ft. Saturday, then 15,000 ft. Saturday night and 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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