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Upper level High Pressure (“Arch” shape in blue arrows) takes over for a while. An upper level low (Shaded “U” shape with blue arrows) will move up to the coast by the end of the week returning the northwest airflow and at least a slight chance of showers by Monday.

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Air Quality Index:

Eugene-Springfield: The Air Quality Index is 18 in the good category measuring Particulate Matter.

Oakridge: The Air Quality Index is 13 in the Good category measuring Particulate Matter.

Cottage Grove: The Air Quality Index is 19 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 is in effect 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 sunny and a bit cooler this afternoon, partly cloudy tonight,
• AM clouds, partly cloudy and a bit cooler Saturday and Saturday night,
• AM clouds, a mix of clouds and sun and a bit cooler Sunday afternoon, then mostly cloudy with a (40%) chance of showers Sunday night.
• highs 80-76 lows 53-55.
• Mostly cloudy with a (30%) chance of AM showers, a slight (20%) chance of showers Monday afternoon and at night,
• A slight (20%) chance of AM showers, partly cloudy and a bit warmer Tuesday afternoon and Tuesday night,
• Partly cloudy Wednesday AM, mostly sunny and a bit warmer in the afternoon, partly cloudy Wednesday night and Thursday AM, then mostly sunny Thursday afternoon.
• highs 76-80 cooling to 78 Thursday lows near 54. (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:

• Sunny and a bit cooler today, clear this evening, mostly cloudy with a slight (20%) chance of rain and drizzle late tonight and Saturday AM, sunny and a bit cooler in the afternoon, mostly clear in the evening, then mostly cloudy with a slight (20%) chance of rain and drizzle late Saturday night,
• Mostly cloudy with a (30%) chance of rain and drizzle Sunday AM, a slight (20%) chance of showers in the afternoon, mostly cloudy with a (30%) chance of showers Sunday night.
• highs 82-78 lows near 56.
• Mostly cloudy with a (30%) chance of showers Monday and Monday night,
• Mostly cloudy with a slight (20%) chance of showers Tuesday AM, just partly cloudy and a bit warmer in the afternoon through Wednesday afternoon, mostly clear in the evening, then partly cloudy Wednesday and Thursday.
• highs 79-82 lows near 55. (seasonal averages high 85 low 56)

 

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

• Partly cloudy this AM, sunny this afternoon, partly cloudy this evening with a slight (20%) chance of coastal showers and a slight (20%) chance of rain or drizzle late at night while mostly cloudy inland with a (30%) chance of showers late tonight,
• Cloudy with a slight (20%) chance of rain and drizzle Saturday AM, partly cloudy in the afternoon and evening, mostly cloudy with a (30%) chance of coastal rain and drizzle while a slight (20%) chance of inland rain and drizzle Saturday night,
• Mostly cloudy with a (40%) chance of rain and drizzle Sunday AM, then a slight (20%) chance of showers in the afternoon and Sunday night.
• highs near 65 lows near 56.
• Mostly cloudy with a (40%) chance of showers Monday, a slight (20%) chance of showers at night and Tuesday AM, partly cloudy in the afternoon and evening, mostly cloudy late Tuesday night,
• Then partly cloudy Wednesday through Thursday.
• highs near near 65 lows near 55. (seasonal averages high 65 low 53)

 

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Forecast for the Cascades in Lane County:

• Mostly sunny and a bit cooler today, mostly clear tonight,
• AM sun, partly cloudy Saturday afternoon, mostly clear Saturday night,
• Partly cloudy with a slight (20%) chance of showers Sunday AM, mostly cloudy and a bit cooler with a good (50%) chance of showers and a slight (20%) chance of thunderstorms in the afternoon, partly cloudy with a good (50%) chance of showers and a slight (20%) chance of thunderstorms in the evening, then mostly cloudy with a good (20%) chance of showers late Sunday night.
• free air freezing level 13,000 ft. today through Saturday night, then snow level above 8,000 ft. late Sunday and Sunday night,
• highs 67-65 lows 40-43.
• A mix of clouds and sun with a (30%) chance of showers Monday AM, a slight (20%) chance of showers and a bit cooler in the afternoon, partly cloudy with a slight (20%) chance of showers Monday night,
• A mix of clouds and sun with a slight (20%) chance of showers Tuesday AM, mostly sunny and a bit warmer in the afternoon, mostly clear at night,
• Mostly sunny and a bit warmer Wednesday, then partly cloudy Wednesday night and Thursday (a bit cooler).
• snow level above 8,000 ft. Monday through Tuesday AM, free air freezing level 11,000 ft. Tuesday afternoon, 11,000 ft. rising to 13,000 ft. late Tuesday night, 13,000 ft. Wednesday, 13,000 ft. rising to 14,000 ft. Wednesday night, then 14,000 ft. Thursday.
• highs 64-68 cooling to 65 Thursday lows 42-45.

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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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