Here is my new weekly weather quiz question. What is a “Baroclinic leaf shield?” The first person to post the correct answer as a comment on this page will win a week of free personalized weather forecasts tailored to your needs.  Good luck.

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An Upper Level High Pressure Ridge (Shaded “Arch” shape with blue arrows) is moving to the east and n Upper Level Low Pressure Trough (Shaded “U” shape with blue arrows) to our north are going to keep us in relatively normal temperatures for the season with minor fluctuation up and down.  The graphics for days 3-7 show the frontal systems that attempt to move into the Pacific Northwest Thursday through Monday of next week bringing a slight chance of light rain or drizzle Wednesday and Thursday.

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Air Quality Index:

Eugene-Springfield: The Air Quality Index is 22 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 24 in the Good category measuring Ozone.

Data courtesy of Lane Regional Air Protection Agency (LRAPA)

 

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Advisories:

•  A Health Advisory continues for Lake Billy Chinook, located 12 miles west of Madras in Jefferson County. Water monitoring has has confirmed the presence of Blue-green Algae and the toxins they produce. These toxin concentrations ca be harmful to humans and animals. 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. Drinking water directly from these areas of Lake Billy Chinook at this time is especially dangerous. Oregon public health officials advise campers and other recreational visitors that toxins cannot be removed by boiling, filtering or treating water with camping-style filters.
• A Permanent Health Advisory remains in effect for the South Umpqua River and Lawson Bar. Pools in the bedrock along the rivers edge are known to develop Blue-green Algae (cyanobacterial) blooms that can be harmful to pets and people if accidental ingestion occurs. Signs have been posted along several access areas along the river.

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Forecast for the Southern and lower Mid Willamette Valley including Eugene-Springfield and Albany-Corvallis:

• Sunny and a bit warmer today, Tuesday and Wednesday, clear tonight and Tuesday night,  clear in the evening, then mostly cloudy late Wednesday night.
• highs 85-82 lows 50-53.
• Mostly cloudy in the AM, becoming mostly sunny and a bit cooler Thursday afternoon, partly cloudy Thursday night,
• Partly cloudy Friday AM, mostly sunny and a bit warmer Friday afternoon, mostly clear Friday night,
• Mostly sunny Saturday, mostly clear at night,
• Then sunny Sunday.
• highs 80-83 lows near 52. (seasonal averages high 83 low 52)

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Eugene-Springfield Pollen Count

Grass………. Moderate (8)

Trees………. Low (3)

Last Counted: 7/13/17

Data Courtesy of Oregon Allergy Associates.

Note: It would seem the pollen season is all but over.

 

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Forecast for Roseburg:

• Sunny and a bit warmer today and Tuesday, clear both nights,
• Partly cloudy in the AM, sunny and slightly warmer Wednesday afternoon, clear in the evening, then mostly cloudy with patchy fog late Wednesday night.
• highs near 84 lows 54-56.
• AM clouds and patchy fog with a slight (20%) chance of showers, partly cloudy and a bit cooler Thursday afternoon and Thursday night,
• Partly cloudy  and a bit warmer Friday, mostly clear Friday night,
• Then mostly sunny and a bit warmer Saturday and Sunday, mostly clear Saturday  night.
• highs 80-86 lows near 56. (seasonal averages high 85 low 57)

 

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

• Sunny and a bit cooler this afternoon, clear this evening, mostly cloudy with patchy coastal drizzle late tonight while partly cloudy with patchy fog inland late tonight,
• Cloudy with patchy AM coastal drizzle and partly cloudy Tuesday afternoon while partly cloudy inland in the AM and sunny in the afternoon inland, partly cloudy in the evening, mostly  cloudy with patchy fog late Tuesday night with patchy coastal drizzle late,
• Partly cloudy with patchy AM and late night fog, otherwise partly cloudy Wednesday evening, then mostly cloudy with a light (20%) chance of showers late at night.
• highs near 63 lows near 52.
• Cloudy with a slight (20%) chance of AM showers, partly cloudy Thursday afternoon, partly cloudy Thursday night through Friday night,
• Then mostly sunny Saturday and Sunday, mostly clear Saturday night.
• highs near 63 lows near 54. (seasonal averages high 65 low 53)

 

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Forecast for the Cascades in Lane County:

• Sunny and a bit warmer today and Tuesday, clear both nights,
• Sunny and a bit warmer Wednesday, clear in the evening, then partly cloudy at night.
• free air freezing level 12,000 ft. today through Wednesday night.
• highs 72-74 lows 43-45.
• AM clouds and sun, mostly sunny and a bit cooler Thursday, mostly clear Thursday night,
• Mostly sunny and a bit warmer Friday and Saturday, mostly clear at night,
• Then sunny and a bit warmer Sunday.
• free air freezing level above 12,000 ft. Thursday through Sunday.
• highs 69-75 lows 45-47.

 

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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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