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. It will continue to slide  eastward through the Pacific Northwest. The cool-down should last the rest of the week. A frontal system moved through Oregon this afternoon. 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 14 in the Good category measuring Ozone.

Oakridge: The Air Quality Index is 19 in the Good category measuring Particulate Matter.

Cottage Grove: The Air Quality Index is 13 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 issued 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 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. The advisory is being issued due to visual confirmation of a blue-green algae bloom in the lagoon. Oregon Public Health officials advise people to avoid swallowing or inhaling water droplets as a result of swimming or high-speed water activities, such as water skiing and power boating in areas where blooms are identified.
• 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:

• Mostly cloudy with a slight (20%) chance of evening showers (under 0.10 in. of rain possible), just mostly cloudy late tonight,
• Mostly cloudy and a bit cooler with a slight (20%) chance of rain Thursday afternoon (under 0.10 in. of rain possible), evening rain likely (70%), a good (50%) chance of showers late Thursday night ( 0.10 in. of rain possible),
• Mostly cloudy with a good (50%) chance of showers Friday AM, a good (50%) chance of showers and a slight (20%) chance of thunderstorms Friday afternoon, a slight (20%) chance of evening showers, just mostly cloudy late Friday night,
• Then partly cloudy and a bit warmer Saturday and Saturday night.
• lows 53-48 highs 72-74.
•  Partly cloudy and a bit warmer Sunday and in the evening, mostly cloudy 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 a slight (20%) chance of evening showers, a (40%) chance of showers late Tuesday night,
• Then a mix of clouds and sun Wednesday with a (40%) chance of AM showers .
• highs near 75 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 decrees 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 – Thursday 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 with a slight (20%) chance of isolated showers this evening (under 0.10 in. of rain possible), just mostly cloudy late tonight,
• Mostly cloudy and a bit cooler Thursday, mostly cloudy with a (30%) chance of showers Thursday night (under 0.10 in. of rain possible),
• Mostly cloudy and a bit cooler with a sight (20%) of showers Friday, just mostly cloudy in the evening, then partly cloudy and a bit warmer late Friday night through Saturday night.
• lows 54-50 highs 77-74 warming back to 77 Saturday.
• Partly cloudy and a bit warmer Sunday, clear in the evening, partly cloudy late Sunday night,
• Partly cloudy and a bit warmer Monday (Labor Day) and Monday night,
• Mostly cloudy with a slight (20%) chance of showers Tuesday through Wednesday AM, then just partly cloudy Wednesday afternoon.
• highs 79-82 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 tonight,
• Mostly cloudy and a bit warmer Thursday with a slight (20%) chance of afternoon coastal showers,  a (40%) chance of showers Thursday night (under 0.10 in. of rain possible) and Friday, just mostly cloudy Friday night,
• Mostly cloudy Saturday AM, then partly cloudy in the afternoon and Saturday night.
• lows 53-49 highs 66-63.
• Partly cloudy Sunday through Monday evening (Labor Day), mostly cloudy with a slight (20%) chance of showers late Monday night,
• Mostly cloudy with a slight (20%) chance of showers Tuesday through Wednesday AM, then just partly cloudy Wednesday afternoon.
• highs 62-66 lows 49-53. (seasonal averages high 66 low 52)

 

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Forecast for the Cascades in Lane County:

• Mostly cloudy with a good (50%) chance of evening showers, a slight (20%) chance of showers late tonight (under 0.10 in. of rain possible),
• A mix of clouds and sun and a bit cooler Thursday, mostly cloudy with a good (50%) chance of evening rain, a good (50%) chance of showers late Thursday night,
• Mostly cloudy with a (40%) chance of AM showers, a bit cooler with a (40%) chance of showers and a slight (20%) chance of thunderstorms Friday afternoon, a slight (20%) chance of evening showers,  just partly cloudy late Friday night,
• Then partly cloudy and a bit warmer Saturday and Saturday night.
• snow level above 8,000 ft. tonight, free air freezing level 12,000 ft. Thursday, snow level above 8,000 ft. falling to 7,500 ft. late Thursday night, 6,500 ft. Friday, 7,000 ft. Friday night, then free air freezing level 9,000 ft. Saturday and Saturday night.
• lows 42-35 highs 62-54 warming to near 60 Saturday.
• Partly cloudy and a bit warmer Sunday through Monday (Labor Day) and at night,
• Partly cloudy with a slight chance of showers and a bit cooler Tuesday afternoon through Wednesday AM, then just partly cloudy and a bit cooler Wednesday afternoon.
• 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 63-68 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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