Here is my weekly weather quiz question for the last time. What is a “Barber Pole?” (In Meteorology) Here is the correct answer. A Barber Pole [Slang], is a thunderstorm updraft with a visual appearance including cloud striations that are curved in a manner similar to the stripes of a barber pole. The structure typically is most pronounced on the leading edge of the updraft, while drier air from the rear flank downdraft often erodes the clouds on the trailing side of the updraft. I will have  new weekly weather quiz question for you starting Monday. 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 going to keep us in relatively normal temperatures for this summer season. Upper level low will stay to our north sending weak waves to cool us a bit then we warm back up again.  The graphics for days 3-7 show frontal systems attempting to move into the Pacific Northwest.

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Air Quality Index:

Eugene-Springfield: The Air Quality Index is 25 in the Good category measuring Ozone.

Oakridge: The Air Quality Index is 20 in the Good category measuring Particulate Matter.

Cottage Grove: The Air Quality Index is 25 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 cooler today, clear tonight,
• Partly cloudy in the AM, mostly sunny and a bit cooler Sunday afternoon, clear at night,
• AM clouds, sunny Monday afternoon, then clear Monday night.
• highs 80-78 warming back to 80 Monday lows near 52.
• Sunny Tuesday and Wednesday, clear each night,
• Sunny Thursday, then party cloudy Thursday night and Friday.
• highs 82-80 lows 52-54. (seasonal averages high 83 low 52)

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Eugene-Springfield Pollen Count

Grass………. High (28)

Trees………. Low (3)

Last Counted: 7/7/17

Data Courtesy of Oregon Allergy Associates.

Note: It would seem the pollen season has ended. Hooray!

 

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Forecast for Roseburg:

• Sunny and a bit cooler today and Sunday, mostly clear both nights,
• Mostly sunny Monday, then mostly clear at night.
• highs 84-82 lows near 54.
• Sunny and a bit warmer Tuesday, clear Tuesday night,
• Mostly sunny and slightly warmer Wednesday, mostly clear at night,
• Sunny and a bit cooler Thursday, then partly cloudy with a slight (20%) chance of showers Thursday night and Friday (a bit warmer).
• highs 84-82 warming back to 84 Friday lows near 56. (seasonal averages high 85 low 56)

 

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

• Mostly cloudy with patchy coastal fog this AM, sunny this afternoon, mostly clear this evening, partly cloudy late tonight,
• AM clouds, mostly sunny Sunday afternoon, mostly clear, at night,
• Mostly sunny Monday, then mostly clear at night.
• highs near 62 lows near 52.
• Mostly sunny Tuesday, mostly clear Tuesday night,
• Partly cloudy in the AM, sunny Wednesday afternoon, mostly clear in the evening at night,
• Mostly sunny Thursday, mostly clear in the evening, mostly cloudy with a slight (20%) chance of showers Thursday night and Friday AM, then just partly cloudy Friday afternoon.
• highs near 63 lows near 54. (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,
• Sunny Sunday, mostly clear at night,
• Sunny Monday, then clear Monday night.
• free air freezing level 14,000 ft. today through Monday night.
• highs 72-70 lows 43-45.
• Mostly sunny and a bit warmer Tuesday and Wednesday, mostly clear both nights,
• Mostly sunny and a bit cooler Thursday, then partly cloudy Thursday night and Friday.
• free air freezing level 13,000 ft. Tuesday and Tuesday night, 14,000 ft. Wednesday through Thursday, then 13,000 ft. Thursday night and Friday.
• highs 72-74 lows 44-47.

 

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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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