Here is my 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.

________________

 

An upper level low pressure trough is cooling us down as it moves in and eventually through the Pacific Northwest. By Friday another frontal system will move through Oregon.

 

________________

Air Quality Index:

Eugene-Springfield: The Air Quality Index is 20 in the Good  category measuring Particulate Matter.

Oakridge: The Air Quality Index is 13 in the Good category measuring Particulate Matter.

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

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

________________

 

Advisories:

• 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.

 

________________

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

• Cloudy early this AM, sunny and a bit cooler this afternoon, clear in the evening, mostly cloudy late tonight and Monday AM, mostly sunny and a bit cooler in the afternoon, clear in the evening, mostly cloudy late Monday night,
• Mostly cloudy Tuesday AM, partly cloudy and a bit cooler in the afternoon, then mostly clear Tuesday night.
• highs 83-79 lows 52-55 cooling to 53 Tuesday night.
• Mostly sunny and a bit warmer Wednesday and Thursday, clear Wednesday night, clear in the evening, partly cloudy late Thursday night,
• Then mostly sunny Friday and Saturday (a bit cooler), mostly clear Friday night.
• highs 83-85 cooling to 80 Saturday lows 55-53. (seasonal averages high 84 low 52)

 

_____

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.

___________________

Forecast for Roseburg:

• Mostly cloudy this AM, sunny and a bit cooler this afternoon, clear in the evening, mostly cloudy late tonight and Monday AM, partly cloudy and a bit cooler Monday afternoon, clear in the evening, partly cloudy late Monday night,
• Mostly cloudy Tuesday AM, sunny and a bit cooler in the afternoon, then clear Tuesday night.
• highs 86-83 lows near 56.
• Then mostly sunny Wednesday, Thursday, Friday and Saturday, mostly clear each night.
• highs 87-84 lows 57- 60 cooling back to 57 Friday night. (seasonal averages high 86 low 57)

 

________________

 

 

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

• Mostly cloudy today at the shore while mostly cloudy inland this AM and sunny this afternoon inland, clear in the evening, mostly cloudy late tonight and Monday, clear in the evening, mostly cloudy late Monday night,
• Mostly cloudy in the AM, partly cloudy and a bit cooler Tuesday afternoon, then mostly clear Tuesday night.
• highs near 65 lows near 55.
• Partly cloudy Wednesday and Wednesday night,
• AM clouds, sunny Thursday, afternoon, clear in the evening, then partly cloudy late Thursday night through Saturday.
• highs near 66 lows near 56. (seasonal averages high 65 low 53)

 

________________

 

Forecast for the Cascades in Lane County:

• Sunny and a bit cooler today, mostly clear tonight,
• Mostly sunny and a bit warmer Monday, mostly clear Monday night,
• Mostly sunny and a bit cooler Tuesday, then mostly clear Tuesday night.
• free air freezing level 15,000 ft. today through Monday, 14,000 ft. Monday night, 12,000 ft. Tuesday, then 14,000 ft. Tuesday night.
• highs 72-75 cooling to 67 Tuesday lows near 44.
• Mostly sunny and a bit warmer Wednesday, clear Wednesday night,
• Then sunny Thursday, Friday and Saturday, clear each night.
• free air freezing level 14,000 ft. Wednesday, 15,000 ft. Wednesday night through Thursday night, then 14,000 ft. Friday through Saturday.
• highs 75-77 cooling to 74 Friday and Saturday lows 46-48.

________________

 

**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.

________________

Get your local Eugene-Springfield and Lane County news on-line at eugenedailynews.com.

________________