Here is my weekly weather quiz question. What is a “Stilling Basin?”  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) gives us the impetus for the change in our weather pattern. A frontal system moved through the Pacific Northwest keeping us in showers. Take a look at the frontal system that will be moving in Tuesday. The 2016 Olympic Team Trials that run through Sunday at Hayward Field will encounter the chance of showers through the rest of the competition, as you can see in the forecast.

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Air Quality Index:

Eugene-Springfield: The Air Quality Index is 15 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 10 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 issued 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 now includes the Crooked River Arms. 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 cloudy with rain this evening then tapering off at night (0.10 in. of rain possible),
• Mostly cloudy and a bit warmer with a good (50%) chance of showers Saturday afternoon (under 0.10 in. of rain possible), evening showers, rain late Saturday night (0.25 in. of rain possible) and Sunday AM, showers likely (70%) with a slight (20%) chance of thunderstorms and a bit cooler Sunday afternoon, mostly cloudy with a slight (20%) chance of showers at night,
• A mix of clouds and sun and a bit warmer Monday, partly cloudy in the evening, then mostly cloudy Monday night.
• lows 53-50 warming to 52 Monday night highs 72-68 warming to 75 Monday.
• A mix of clouds and sun with a slight (20%) chance of showers Tuesday afternoon, partly cloudy with a slight (20%) chance of showers in the evening, just partly cloudy late Tuesday night and Wednesday AM, mostly sunny and a bit warmer in the afternoon, mostly clear Wednesday night,
• Then mostly sunny and a bit warmer Thursday and Friday, mostly clear Thursday  night.
• highs 75-82 lows near 50. (seasonal averages high 81 low 51)

 

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Eugene-Springfield Pollen Count:

Grass………. Moderate (6)

Trees………. Low (0)

Last Counted: 7/8/16

Data Courtesy of Oregon Allergy Associates.

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Forecast for Roseburg:

• Cloudy with evening showers, a good (50%) chance of showers late tonight (0.25 in. of rain possible),
• Mostly cloudy with a (30%) chance of showers and a bit warmer Saturday (under 0.10 in. of rain possible), cloudy with a (40%) chance of evening showers, showers likely (70%) late at night (0.25 in. of rain possible) and Sunday AM, a good (50%) chance of showers and a bit cooler in the afternoon, mostly cloudy with a slight (20%) chance of showers Sunday night,
• Then partly cloudy  and a bit warmer Monday and Monday night.
• lows 58-53 warming to 55 Monday night highs 73-69 warming to 79 Monday.
• Partly cloudy with a slight (20%) chance of showers Tuesday, mostly clear at night,
• Mostly sunny and a bit warmer Wednesday, clear at night,
• Mostly sunny and a bit warmer Thursday, mostly clear Thursday night,
• Then sunny, but a bit cooler Friday.
• highs 78-84 cooling to 82 Friday lows near 54. (seasonal averages high 83 low 56)

 

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

• Mostly cloudy with evening showers, a (30%) chance of showers late tonight (0.25 in. of rain possible),
• Mostly cloudy with a (40%) chance of showers Saturday (under 0.10 in. of rain possible), coastal showers likely (70%) in the evening and showers late at night while a good (50%) chance of evening inland showers and inland showers likely (70%) late Saturday night (0.25 in. of rain possible),
• Mostly cloudy with AM showers likely (70%), a (40%) chance of showers Sunday afternoon, mostly cloudy Sunday night with a slight (20%) chance of evening inland showers,
• Mostly cloudy in the AM, partly cloudy and a bit warmer Monday afternoon, then mostly cloudy with a slight (20%) chance of showers late Monday night.
• lows 56-54 highs 63-65.
• Mostly cloudy with a slight (20%) chance of AM showers Tuesday, partly cloudy with a slight (20%) chance of afternoon showers, partly cloudy Tuesday night and Wednesday, mostly clear Wednesday night,
• Partly cloudy Thursday, mostly clear at night,
• Then mostly sunny and a bit cooler Friday.
• highs 65-63 lows 54-56. (seasonal averages high 64 low 53)

 

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Forecast for the Cascades in Lane County:

• Cloudy with showers tonight (0.25 in. of rain possible),
• Mostly cloudy and a bit cooler with showers likely (70%) Saturday (under 0.10 in. of rain possible), showers at night (0.25 in. of rain possible),
• Cloudy with rain Sunday AM, showers with a slight (20%) chance of thunderstorms and a bit cooler in the afternoon, mostly cloudy with a good (50%) chance of showers Sunday night,
• Then partly cloudy and a bit warmer Monday and Monday night.
• snow level above 8,000 ft. falling to 7,500 ft. late tonight, 7,500 ft. Saturday and Saturday night, 7,000 ft. Sunday, 7,500 ft. Sunday night, then 10,000 ft. Monday and Monday night.
• lows 42-39 highs 54-49 warming to 62 Monday.
•  Partly cloudy and a bit warmer Tuesday through Wednesday AM, mostly sunny and a bit warmer in the afternoon, just clear Wednesday night,
• Then sunny and a bit warmer Thursday and Friday, clear Thursday night.
• free air freezing level 11,000 ft. rising to 12,000 ft. Tuesday, 12,000 ft. rising to 13,000 ft. Tuesday night, 13,000 ft. Wednesday, then 14,000 ft. Wednesday night through Friday.
• highs 64-69 lows 40-42.

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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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