Here is my weekly weather quiz question. What is “Upwelling?” 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. Good luck.

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An upper level low (Shaded “U” shape in blue arrows) has cooled us down with increasing onshore airflow a second and stronger trough follows close behind. It will continue to slide  eastward through the Pacific Northwest. Another frontal system can be seen approaching the Pacific Northwest by next Wednesday. As much as we need some rain I’m sure most of us are hoping that it is dry and warm for the long Labor day weekend September 3rd through 5th, but it is too soon to make that prediction final. So far it does look like sunshine and warming temperatures for the holiday weekend.

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Air Quality Index:

Eugene-Springfield: The Air Quality Index is 35 in the Good category measuring Particulate Matter.

Oakridge: The Air Quality Index is 11 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 health advisory has been lifted for the Ross Island Lagoon and the mouth of the lagoon as it connects to the Holgate Channel. Ross Island Lagoon is located about one river mile south of downtown Portland in Multnomah County. Water monitoring has confirmed that the number of blue-green algae cells as well as levels of associated toxins are below guideline values for human exposure.
• A health advisory remains in effect for water contact at Nye Beach located in Lincoln County due to higher than normal levels of fecal bacteria. Contact with the water can result in diarrhea, stomach cramps, skin rashes, upper respiratory infections and other illnesses.Direct contact with the water should be avoided in this area until the advisory is lifted, especially by children and the elderly who may be more vulnerable to waterborne bacteria. Visitors should avoid wading in nearby creeks, pools of water on the beach, or in discolored water, and stay clear of water runoff flowing into the ocean.
• A health advisory remains in effect for Agency Lake. Agency Lake is located just north of Upper Klamath Lake near Klamath Falls along Highway 97 in Klamath County. Water monitoring on the lake has confirmed the presence of high levels of blue-green algae and associated toxins that can be harmful to people and animals. Swallowing water while swimming or inhaling water droplets as a result of high-speed water activities, such as water skiing and power boating, should be avoided in areas where blooms are identified. Although toxins are not absorbed through the skin, contact with cells from a bloom can cause skin irritation and a red, puffy rash in individuals with skin sensitivities, or those who develop rashes easily.
• A Blue-Green Algae health advisory remains in effect for Howard Bay (sometimes called Howards Bay or Howard’s Bay) in Upper Klamath Lake ONLY. 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:

• A mix of clouds and sun and a bit cooler with a good (50%) chance of rain this afternoon (under 0.10 in. of rain possible), a (40%) chance of evening rain, showers likely (70%) late tonight (0.10 in. of rain possible),
• Mostly cloudy with a good (50%) chance of showers Friday, just mostly cloudy late Friday night and Saturday AM, partly cloudy and a bit warmer Saturday afternoon, partly cloudy in the evening, mostly cloudy late Saturday night.
• highs 72-74 lows 53-48.
• Partly cloudy and a bit warmer Sunday and in the evening, mostly cloudy late Sunday night,
• A mix of clouds and sun Monday (Labor Day), partly cloudy at night,
• A mix of clouds and sun and a bit warmer with a slight (20%) chance of showers Tuesday afternoon, mostly cloudy with slight (20%) chance of evening showers, a (40%) chance of showers late Tuesday night,
• Mostly cloudy with a (40%) chance of showers Wednesday AM, then a slight (20%) chance of showers late Wednesday afternoon.
• highs 75-77 lows 47-52. (seasonal averages high 81 low 50)

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Your College Football Forecast:

Ducks vs UC Davis at Autzen Stadium – Saturday September 3rd- Kickoff 2 PM PDT: Partly cloudy 72 degrees warming to 74 degrees then slow cooling as the game ends, Wind N 5-10 mph.

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Beavers vs Minnesota at TCF Bank Stadium Minneapolis, MN – Today September 1st – Kickoff (8 PM CDT) 6 PM PDT: Clear 68 degrees and cooling to 62 as the game ends, Wind ESE 5 mph.

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Forecast for Roseburg:

• Mostly cloudy and a bit cooler today with a (30%) chance of isolated showers, a slight (20%) chance of showers tonight (under 0.10 in. of rain possible),
• Mostly cloudy and a bit cooler with a sight (20%) of showers Friday AM, just partly cloudy in the afternoon and evening, mostly cloudy Friday night and Saturday AM, then just partly cloudy Saturday night.
• highs near 77 lows 54-47 warming to 50 Saturday night.
• Partly cloudy and a bit warmer Sunday, mostly clear in the evening, partly cloudy late Sunday night and Monday AM (Labor Day), then mostly cloudy with a slight (20%) chance of showers Monday afternoon through Wednesday.
• highs 77-82 cooling to 78 Wednesday lows 50-56. (seasonal averages high 82 low 54)

 

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

• Mostly cloudy and a bit warmer today with a slight (20%) chance of isolated afternoon showers,  cloudy with a (30%) chance of showers late tonight (under 0.10 in. of rain possible),
• Mostly cloudy with a slight (20%) chance of coastal showers Friday while mostly cloudy with a slight (20%) chance of AM showers inland and partly cloudy Friday afternoon, mostly cloudy Friday night and Saturday AM, then partly cloudy in the afternoon and Saturday night.
• highs 66-63 lows 54-49 warming back to 54 Saturday night.
• Partly cloudy Sunday and Sunday night,
• Mostly cloudy with a slight (20%) chance of afternoon showers Monday (Labor Day), then mostly cloudy with a slight (20%) chance of showers late Monday night through Wednesday.
• highs 62-66 lows 49-53. (seasonal averages high 66 low 52)

 

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Forecast for the Cascades in Lane County:

• Becoming mostly cloudy and a bit cooler with a good (50%) chance of rain this afternoon, a good (50%) chance of evening rain, showers likely (70%) late tonight,
• Mostly cloudy with a slight (20%) chance of showers Friday AM, a bit cooler with a (40%) chance of showers in the afternoon, a slight (20%) chance of evening showers,  just partly cloudy late Friday night,
• AM clouds, then partly cloudy and a bit warmer Saturday and Saturday night.
• free air freezing level 12,000 ft. today, snow level above 8,000 ft. falling to 7,500 ft. late tonight, 6,500 ft. Friday, 7,000 ft. Friday night, then free air freezing level 9,000 ft. Saturday and Saturday night.
• highs 62-54 warming to near 60 Saturday lows 40-35.
• Partly cloudy and a bit warmer Sunday through Monday (Labor Day) and Monday night,
• Partly cloudy with a slight chance of showers and a bit cooler Tuesday afternoon, partly cloudy with a slight chance of evening showers, mostly cloudy with a slight (20%) chance of showers Tuesday night,
• A mix of clouds and sun with a slight (20%) chance of showers Wednesday AM, then just partly cloudy and a bit cooler Wednesday afternoon with a (40%) chance of showers.
• free air freezing level 9,000 ft. Sunday through Monday, 11,000 ft. Monday night, then snow level above 8,000 ft. Tuesday through Wednesday.
• highs 63-69 cooling back to 63 Wednesday lows 38-42.

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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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