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) is offshore while high pressure is over the Rockies allowing. The combination of the two keeps up the warming trend. The graphics for days 1-3 show a weak cool front passing through Saturday. The graphics for days 3-7 show the frontal system that moves toward Oregon Sunday and the next frontal system pushing through the Pacific Northwest next 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 31 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 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:

• Mostly clear tonight,
• AM clouds and sun, sunny Friday afternoon, mostly clear at night,
• Mostly sunny and a bit warmer Saturday, mostly clear Saturday night,
• Mostly sunny and a bit cooler Sunday, mostly clear in the evening, mostly cloudy late Sunday night.
• lows 53-50 warming to 54 Sunday night highs 80-85 cooling to 82 Sunday.
• AM clouds, partly cloudy Monday afternoon through Tuesday AM, mostly sunny and a bit warmer Tuesday afternoon and Wednesday, mostly clear Tuesday night and Wednesday night,
• Then sunny but a bit cooler Thursday.
• highs 82-85 cooling back to 82 Thursday lows near 53. (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:

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

 

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Forecast for the Cascades in Lane County:

• Mostly clear tonight,
• Mostly sunny and a bit cooler Friday, clear Friday night,
• Sunny and a bit warmer Saturday, clear at night,
• Sunny and a bit cooler Sunday, then mostly clear Sunday night.
• free air freezing level 15,000 ft. tonight, 14,000 ft. rising to 15,000 ft. Friday, 15,000 ft. rising to 16,000 ft. Friday night, 16,000 ft. Saturday and Saturday night, 15,000 ft. Sunday, then 15,000 ft. falling to 14,000 ft. Sunday night.
• lows 52-47 highs 75-80 cooling back to 75 Sunday.
• Mostly sunny Monday, mostly clear at night.
• Mostly sunny and a bit warmer Tuesday, mostly clear Tuesday night,
• Mostly sunny and a little bit cooler Wednesday, clear at night,
• Then sunny Thursday.
• free air freezing level 14,000 ft. Monday, 14,000 ft. rising to 15,000 ft. Monday night, then 15,000 ft. Tuesday through Thursday.
• 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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