Here is my new weekly weather quiz question for the last time. What is a “Swell?” Here is the correct answer. A Swell: Wind-generated waves that have travelled out of their generating area. Swells characteristically exhibit smoother, more regular and uniform crests and a longer period than wind waves. I’ll have a new weekly weather quiz question starting Monday. Please remember to post your answer as a comment by clicking on “no comments /comments” in the upper right hand portion of this page under the caption, then add your comment. The first person to post the correct answer 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 starts cooling us down. A weak cold front will be approaching the Pacific Northwest over the weekend moving through  Sunday night and Monday AM bringing the temperatures back down to normal again.

 

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Air Quality Index:

Eugene-Springfield: The Air Quality Index is 50 in the Good  category measuring Ozone.

Oakridge: The Air Quality Index is 19 in the Good category measuring Particulate Matter.

Cottage Grove: The Air Quality Index is 50 in the Good category measuring Ozone.

Data courtesy of Lane Regional Air Protection Agency (LRAPA).

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Advisories:

• A RED FLAG WARNING IS IN EFFECT FROM 1 PM UNTIL 9 PM TODAY FOR GUSTY WINDS AND LOW HUMIDITY FOR THE LOWER COLUMBIA BASIN OF OREGON.
• A RED FLAG WARNING IS IN EFFECT UNTIL 9 PM TODAY FOR GUSTY WINDS AND LOW HUMIDITY FOR THE EAST SLOPES OF THE CENTRAL OREGON CASCADES AND THE EAST SLOPES OF THE NORTHERN OREGON CASCADES.
• A Blue-Green Algae health advisory is in effect for Odell Lake in Lane County. Water testing has confirmed the presence of blue-green algae and the toxins they produce. 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.
• A Blue-Green Algae health advisory remains in effect for Howard Bay (sometimes called Howards Bay or Howard’s Bay) in Upper Klamath Lake ONLY. 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.

 

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

• Mostly sunny and cooler today, mostly clear this evening, mostly cloudy late tonight,
• Cloudy Sunday AM, a mix of clouds and sun and a bit cooler in the afternoon and evening, mostly cloudy Sunday night,
• AM clouds, mostly sunny and a bit cooler Monday, partly cloudy in the evening, then mostly cloudy late Monday night.
• highs 85-80 lows near 53.
• Mostly cloudy Tuesday AM, mostly sunny in the afternoon, mostly clear Tuesday night,
• Then mostly sunny and a bit warmer Wednesday, Thursday and Friday, mostly clear Wednesday night, clear in the evening, partly cloudy late Thursday night.
• highs 80-85 lows near 53. (seasonal averages high 84 low 52)

 

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Eugene-Springfield Pollen Count:

Grass………. Moderate (5)

Trees………. Low (0)

Last Counted: 7/29/16

Data Courtesy of Oregon Allergy Associates.

The Grass and Tree Pollen season is officially over now.

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Forecast for Roseburg:

• Sunny and cooler today, clear tonight,
• Mostly cloudy Sunday AM, partly cloudy and a bit cooler in the afternoon, then mostly clear at night,
• Mostly cloudy in the AM, partly cloudy and a bit cooler Monday afternoon, clear in the evening, then partly cloudy Monday night.
• highs 90-86 lows near 56.
• Mostly cloudy Tuesday AM, sunny and a bit cooler in the afternoon, clear Tuesday night,
• Sunny Wednesday, mostly clear at night,
• Then mostly sunny Thursday and Friday, mostly clear Thursday night.
• highs near 86 lows near 57. (seasonal averages high 86 low 57)

 

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

• Mostly cloudy at the shore while mostly cloudy this AM inland and sunny this afternoon inland, mostly cloudy at the shore tonight while clear inland,
• Mostly cloudy Sunday at the shore while mostly cloudy inland in the AM and sunny Sunday afternoon inland, clear in the evening, mostly cloudy and a bit warmer Sunday night and Monday, then partly cloudy Monday night.
• highs 66-69 lows near 56.
• Partly cloudy and a bit cooler Tuesday, mostly clear Tuesday night,
• Mostly sunny Wednesday, partly cloudy Wednesday night and Thursday, clear in the evening, partly cloudy late Thursday night and Friday AM, then sunny Friday afternoon.
• highs near 66 lows near 56. (seasonal averages high 65 low 53)

 

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Forecast for the Cascades in Lane County:

• Sunny and cooler today, mostly clear tonight,
• Mostly sunny and a bit cooler Sunday and Monday, clear Sunday evening then partly cloudy late Sunday night and Monday night,
• free air freezing level 16,000 ft. today through Sunday, 15,000 ft. Sunday night and Monday,  then 14,000 ft. Monday night,
• highs 76-72 lows 45-42.
• Partly cloudy Tuesday AM, sunny but cooler Tuesday afternoon, clear at night,
• Then sunny and a bit warmer Wednesday, Thursday and Friday, clear each night.
• free air freezing level 13,000 ft. Tuesday, 14,000 ft. Tuesday night through Wednesday night, 15,000 ft. Thursday and Thursday night, then 14,000 ft. Friday.
• highs 69-75 lows 43-48.

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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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