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Check out my latest Eugene Daily News Weather Or Not Column Oregon Was The First State To Make It A Holiday.

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And don’t forget my latest feature story in the continuing series on service club organizations called “Buffalo Isn’t Only Known For Its Wings.”

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Sorry, but no winner this week. Here is my weekly weather quiz question for the last time. What is  “popcorn convection?” Here is the correct answer. Popcorn Convection is slang for showers and thunderstorms that form on a scattered basis with little or no apparent organization, usually during the afternoon in response to diurnal heating. Individual thunderstorms typically are of the type sometimes referred to as air-mass thunderstorms: they are small, short-lived, very rarely severe, and they almost always dissipate near or just after sunset. I’ll have a new weekly weather quiz question for you 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. The answer has to be a comment to win. An email answer will not count. Good luck.

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An upper level trough of low pressure (Shaded “U” shape with blue arrows) will  swing to the south and east at us increasing the onshore airflow. That will continue the cooling trend and hopefully scour out the smoke from the wildfires that surround us. As the winds shifted more from the Southwest smoke from the wildfire west of Cottage Grove moved in particularly in the South Hills of Eugene. The increased onshore airflow could mix the air enough to cut back the smokey haze.

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Advisories:

• A RED FLAG WARNING IS IN EFFECT UNTIL 8 PM THIS EVENING FOR WIND AND LOW RELATIVE HUMIDITY FOR THE EAST SLOPES OF THE NORTHERN CASCADES.
• A RED FLAG WARNING IS IN EFFECT FROM 11 AM UNTIL 11  PM MONDAY FOR WIND AND LOW RELATIVE HUMIDITY FOR THE LOWER COLUMBIA BASIN OF OREGON.
• A HEALTH ADVISORY CONTINUES FOR THE PRESENCE OF BLUE-GREEN ALGAE FOR WALTERVILLE POND IN LANE COUNTY AND AT DEVILS LAKE IN LINCOLN COUNTY. THE TOXIC ALGAE BLOOM MEANS THAT PEOPLE SHOULD NOT HAVE DIRECT CONTACT WITH THE AFFECTED WATER AND THAT ALSO GOES FOR ANY PETS.

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Air Quality Index:

Eugene-Springfield: The Air Quality Index is 94 in the Moderate category measuring Particulate Matter at Springfield City Hall. Data courtesy of Lane Regional Air Protection Agency (LRAPA)

Oakridge: The Air Quality Index is 152 in the Unhealthy category measuring Particulate Matter at Willamette Activity Center, Oakridge. Data courtesy of Lane Regional Air Protection Agency (LRAPA)

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

• Clear tonight with more patchy smoke,
• Partly cloudy and a bit cooler Monday and Monday night (smoke dissipated?),
• Mostly cloudy in the AM, partly cloudy Tuesday afternoon through Wednesday  AM, sunny Wednesday afternoon, then clear at night.
• lows 50-52 cooling to 46 Wednesday night highs 83-78 warming back to 80 Wednesday.
• Sunny Thursday, Friday and Saturday, and Sunday, clear each night.
• highs 86-88 cooling back to 86 Sunday lows 47-55. (seasonal averages high 79 low 49)

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Forecast for the Umpqua Basin including Roseburg:

• Clear with patchy smoke tonight,
• Patchy AM smoke, sunny Monday afternoon, mostly clear in the evening, mostly cloudy late Monday night,
• Mostly cloudy Tuesday AM, sunny in the afternoon, mostly clear Tuesday night,
• Sunny Wednesday, then clear at night.
• lows 55-50 warming back to 52 Wednesday night highs 88-78 warming to 86 Wednesday.
• Sunny Thursday, Friday, Saturday and Sunday, clear each night.
• highs 92-90 lows near 55. (seasonal averages high 81 low 53)

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Forecast for the South Oregon Coast including Coos Bay and North Bend:

• Partly cloudy this evening, mostly cloudy with patchy coastal fog late tonight,
• Mostly cloudy with patchy AM fog, sunny Monday afternoon, partly cloudy in the evening, mostly cloudy Monday night and Tuesday AM, partly cloudy in the afternoon and Tuesday night,
• Partly cloudy in the AM, sunny Wednesday afternoon, then clear at night.
• lows 52-56 cooling to 53 Wednesday night highs 63-66.
• Mostly sunny Thursday, Friday, Saturday, and Sunday, mostly clear at night.
• highs near 69 lows near 53. (seasonal averages high 65 low 51)

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Forecast for the Cascades in Lane County:

• Clear with patchy smoke tonight,
• Patchy AM smoke, mostly sunny Monday, partly cloudy Monday night through Wednesday AM,  sunny in the afternoon, then clear Wednesday night.
• free air freezing level 13,000 ft. tonight through Monday night, 14,000 ft. Tuesday and Tuesday night, then 15,000 ft. Wednesday and Wednesday night.
• lows 49-40 warming to 42 Wednesday night highs 72-65 warming back to 72 Wednesday.
• Sunny Thursday, Friday, Saturday, and Sunday, clear each night.
• free air freezing level 15,000 ft. Thursday through Saturday, then 14,000 ft. Saturday night and Sunday.
• highs 72-76 cooling to back to 72 Saturday night lows 48-45.

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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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