Here is my weekly weather quiz question. What is a “Warm Occlusion?” 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) is still in control of our weather.  Shower chances return late tonight as a frontal system quickly pushes into Oregon. We’re stuck between that upper level low and an upper level high pressure ridge over the Pacific Ocean which means not much change in the current weather pattern. A frontal system moves through Oregon Thursday. There will be a slight break Friday and early Saturday, but more clouds and the chance of showers returns for the rest of the weekend. Here’s another frontal system sliding through the Pacific Northwest next Sunday.

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Air Quality Index:

Eugene-Springfield: The Air Quality Index is 31 in the Good category measuring Ozone.

Oakridge: The Air Quality Index is 7 in the Good category measuring Particulate Matter.

Cottage Grove: The Air Quality Index is 31 in the Good category measuring Ozone.

Data courtesy of Lane Regional Air Protection Agency (LRAPA).

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Advisories:

• A FROST ADVISORY IS IN EFFECT FROM 3 AM UNTIL 8 AM TUESDAY FOR THE KLAMATH BASIN, NORTHERN AND EASTERN KLAMATH COUNTY, AND WESTERN, CENTRAL AND EASTERN LAKE COUNTY.
• A Health Advisory remains in effect for ocean water contact at Neskowin Beach located in Tillamook 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 ocean 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 Blue-Green Algae 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:

• Partly cloudy this evening, becoming mostly cloudy with a good (50%) chance of rain developing late tonight (under 0.10 in. of rain possible),
• Cloudy with AM rain, mostly cloudy with showers likely (70%) and a bit cooler Tuesday afternoon (0.10 in. of rain possible), a slight (20%) chance of showers in the evening (under 0.10 in. of rain possible), just mostly cloudy late Tuesday night,
• A mix of clouds and sun and warmer Wednesday, partly cloudy in the evening, mostly cloudy late Wednesday night,
• A mix of clouds and sun and a bit warmer Thursday, then just partly cloudy at night.
• lows 53-46 highs 69-79.
• A mix of clouds and sun and a bit warmer Friday, clear in the evening, partly cloudy late Friday night,
• A mix of clouds and sun and a bit cooler Saturday, partly cloudy at night and Sunday AM, mostly sunny and a bit cooler Sunday afternoon and Monday (a bit warmer), partly cloudy Sunday night.
• highs 83-77 warming back to 83 Monday lows 50-54 cooling back to 50 Sunday night. (seasonal averages high 80 low 49)

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College Football Forecast:

Saturday September 10th- Ducks vs Virginia at Autzen Stadium Kickoff 7:30 PM – Partly cloudy 73 degrees and cooling as the game progresses.

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Saturday September 10th- Beavers have a Bye week.

Next game- Saturday September 17th- Beavers vs Idaho State at Reser Stadium Kickoff Time?? Way too soon for an accurate forecast that far in the future.

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Forecast for Roseburg:

• Partly cloudy this evening, mostly cloudy with a slight (20%) chance of rain late tonight,
• Mostly cloudy with rain Tuesday AM, showers likely (70%) in the afternoon (under 0.10 in. of rain possible), a slight (20%) chance of showers in the evening, just mostly cloudy late Tuesday night and Wednesday AM, sunny and a bit warmer in the afternoon,  mostly clear Wednesday night,
• Sunny and a bit warmer Thursday, then mostly clear at night.
• lows 53-55 cooling back to 53 Thursday night highs 75-84.
• Mostly sunny and a bit warmer Friday, clear at night,
• Sunny a Saturday, clear in the evening, partly cloudy late at night,
• Partly cloudy in the AM, sunny but just a bit cooler Sunday afternoon, sunny and a bit warmer Monday, mostly clear Sunday night.
• highs 88-84 warming to 87 Monday lows 52-55. (seasonal averages high 81 low 53)

 

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

• Partly cloudy this evening, mostly cloudy with a (30%) chance of rain late tonight (under 0.10 in. of rain possible),
• Cloudy with AM rain, a (40%) chance of showers Tuesday afternoon (under 0.10 in. of rain possible), mostly cloudy Tuesday night and Wednesday AM, then sunny and a bit warmer in the afternoon, mostly clear in the evening,  partly cloudy late Wednesday night,
• Partly cloudy in the AM, sunny and a bit warmer Thursday afternoon, then mostly clear Thursday night.
• lows near 53 highs 66-68.
• Mostly sunny Friday and Saturday, mostly clear Friday night, partly cloudy Saturday night,
• Partly cloudy Sunday, mostly clear at night,
• Then mostly sunny and a bit warmer Monday.
• highs 67-72 lows near 52. (seasonal averages high 66 low 51)

 

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Forecast for the Cascades in Lane County:

• Partly cloudy with a slight (20%) chance of rain late tonight,
• Cloudy with AM rain likely (70%), showers and cooler Tuesday afternoon, mostly cloudy with a good (50%) chance of evening showers, a slight (20%) chance of showers late Tuesday night,
• A mix of clouds and sun and warmer Wednesday, then partly cloudy Wednesday night through 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 and Thursday, then 14,000 ft. Thursday night.
• lows near 40 highs 52-65.
• Mostly sunny and a bit warmer Friday, Saturday, (a bit cooler) Sunday and Monday, mostly clear each night,
• free air freezing level 14,000 ft. Friday through Saturday night, 12,000 ft. Sunday, then 11,000 ft. Sunday night and Monday.
• highs 73-65 lows 405-37.

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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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