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 while high pressure is over the Rockies allowing for more inland warming. The graphics for days 3-7 show the frontal system that moves into Oregon Friday night into Saturday and the next frontal system approaching the Pacific Northwest Tuesday.

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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 22 in the Good category measuring Particulate Matter.

Cottage Grove: The Air Quality Index is 9 in the Good category measuring Particulate Matter.

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:

• AM clouds, mostly sunny this afternoon, mostly clear this evening, clear tonight,
• Cloudy Friday AM, sunny and a bit cooler in the afternoon, mostly clear at night,
• Mostly sunny Saturday, then mostly clear Saturday night.
• highs 86-80 warming to 85 Saturday lows near 52.
• Mostly sunny Sunday, mostly clear in the evening, mostly cloudy late at night,
• AM clouds, partly cloudy Monday afternoon through Tuesday AM, mostly sunny and a bit warmer Tuesday afternoon and Wednesday, mostly clear Tuesday night.
• highs 83-86 lows 54-52 warming back to 54 Tuesday night. (seasonal averages high 80 low 51)

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Eugene-Springfield Pollen Count

Grass………. High (89)

Trees………. Low (6)

Last Counted: 7/5/17

Data Courtesy of Oregon Allergy Associates.

 

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Forecast for Roseburg:

• Partly cloudy this AM, becoming sunny this afternoon, clear this evening, mostly cloudy late at night and Friday AM, sunny and a bit cooler in the afternoon,  partly cloudy Friday night,
• Partly cloudy in the AM, sunny and a bit warmer Saturday afternoon, then partly cloudy Saturday night.
• lows near 58 highs near 87-84 warming back to 87 Saturday.
• Partly cloudy and a bit cooler Sunday, mostly clear at night,
• Mostly sunny and a bit cooler Monday, partly cloudy Monday night and Tuesday, mostly clear Tuesday night,
• Then mostly sunny Wednesday.
• highs near 86 lows 56-58. (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 coastal fog AM fog while morning clouds inland and sunny and a bit cooler this afternoon, partly cloudy in the evening, mostly cloudy with patchy coastal fog and drizzle late tonight,
• Cloudy with patchy AM fog and drizzle, sunny and a bit warmer Friday afternoon, clear in the evening, mostly cloudy with patchy coastal fog late at night,
• Mostly cloudy Saturday AM with patchy coastal fog, sunny in the afternoon, then partly cloudy Saturday night.
• highs near 62 lows near 54.
• Partly cloudy Sunday and Sunday night,
• Mostly cloudy Monday AM, then partly cloudy in the afternoon through Wednesday,
• highs near 64 lows near 54. (seasonal averages high 64 low 52)

 

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Forecast for the Cascades in Lane County:

• Sunny today, clear tonight,
• Mostly sunny and a bit cooler Friday, mostly clear Friday night,
• Mostly sunny and a bit warmer Saturday, then mostly clear at night.
• free air freezing level 15,000 ft. today through Friday, 15,000 ft. rising to 16,000 ft. Friday night, then 16,000 ft. Saturday and Saturday night.
• highs 79-74 warming to 79 Saturday lows near 50.
• Sunny and a bit cooler Sunday, mostly clear Sunday night,
• Mostly sunny and a bit warmer Monday, mostly clear at night.
• Mostly sunny and a bit warmer Tuesday, mostly clear Tuesday night,
• Then mostly sunny and a bit cooler Wednesday.
• free air freezing level 16,000 ft. falling to 15,000 ft. 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 through Wednesday.
• highs 75-78 cooling to 76 Wednesday lows near 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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