Here is my weekly weather quiz question. What is a “Banner Cloud?” 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 Low Pressure Trough (Shaded “U” shape with blue arrows) moves up toward the coast allowing for more inland warming. The graphics for days 3-7 show the next frontal systems approaching the Pacific Northwest and trying to move through Friday night and another pushing in Monday.

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Air Quality Index:

Eugene-Springfield: The Air Quality Index is 56 in the Moderate category measuring Ozone.

Oakridge: The Air Quality Index is 31 in the Good category measuring Particulate Matter.

Cottage Grove: The Air Quality Index is 65 in the Moderate category measuring Ozone.

Data courtesy of Lane Regional Air Protection Agency (LRAPA)

 

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Advisories:

•  A Health Advisory has been issued 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, mostly clear tonight,
• AM clouds, mostly sunny and a bit cooler Thursday afternoon, mostly clear in the evening, mostly cloudy late Thursday night,
• Cloudy Friday AM, mostly sunny and a bit cooler in the afternoon, then mostly clear at night.
• highs 89-83 lows near 54.
• Mostly sunny Saturday, mostly clear Saturday night,
• Mostly sunny Sunday, partly cloudy at night,
• Partly cloudy Monday through Tuesday AM, then mostly sunny Tuesday afternoon.
• highs 83-85 cooling back to 83 Monday lows near 54. (seasonal averages high 80 low 51)

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Eugene-Springfield Pollen Count

Grass………. High (100)

Trees………. Moderate (16)

Last Counted: 6/30/17

Data Courtesy of Oregon Allergy Associates.

 

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Forecast for Roseburg:

• Sunny today, mostly clear this evening, partly cloudy late tonight,
• Mostly cloudy in the AM, becoming sunny and a bit cooler Thursday afternoon, clear in the evening, mostly cloudy late at night,
• Partly cloudy and a bit cooler Friday and Friday night.
• highs near 87 lows near 58.
• Partly cloudy in the AM, sunny and a bit warmer Saturday afternoon, partly cloudy Saturday night,
• Partly cloudy and a bit cooler Sunday, mostly clear at night,
• Mostly sunny and a bit cooler Monday, then partly cloudy and a bit cooler Monday night and Tuesday.
• highs 85-83 lows near 58. (seasonal averages high 82 low 55)

 

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

• Mostly cloudy with patchy AM coastal fog, sunny and a bit warmer this afternoon, mostly cloudy with patchy coastal fog late tonight,
• Mostly cloudy with patchy coastal fog Thursday AM, sunny and a bit cooler in the afternoon, partly cloudy in the evening, mostly cloudy with patchy fog late Thursday night,
• Cloudy with patchy AM fog, mostly sunny and a bit warmer Friday afternoon, partly cloudy at night,
• highs 67-62 lows near 54.
• Then partly cloudy Saturday through Tuesday.
• highs near 64 lows near 55. (seasonal averages high 64 low 52)

 

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Forecast for the Cascades in Lane County:

• Sunny this AM, partly cloudy and a bit warmer with a slight (20%) chance of showers and thunderstorms this afternoon and evening, just partly cloudy late tonight,
• Mostly sunny in the AM, partly cloudy and a bit cooler Thursday afternoon and in the evening, partly cloudy late at night,
• Mostly sunny and a bit cooler Friday, then mostly clear Friday night.
• snow level above 8,000 ft. today through Thursday night, free air freezing level 14,000 ft. Friday, then 15,000 ft. Friday night.
• highs 79-75 lows near 50.
• Mostly sunny and a bit warmer Saturday, mostly clear at night,
• Sunny and a bit cooler Sunday, mostly clear Sunday night,
• Mostly sunny and a bit cooler Monday and Tuesday, mostly clear Monday night
• free air freezing level 15,000 ft. Saturday through Sunday, 15,000 ft. falling to 14,000 ft. Monday, 14,000 ft. rising to 15,000 ft. Monday night, then 15,000 ft. Tuesday.
• highs 76-72 lows 50-48.

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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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