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Check out my latest Eugene Daily News Weather Or Not Column It’ll Never Get Off The Ground!

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Sorry, no winner this week. Here is my weekly weather quiz question for the last time. What is an “Urban Heat Island?” Here is the correct answer. An “Urban Heat Island” is the increased air temperatures in urban areas in contrast to cooler surrounding rural areas. It is caused by the solar radiation in the city being reflected back to the streets from the glass and concrete buildings and being held by the pavement.  I’ll have a new weekly weather quiz 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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Advisories:

A Blue-Green Algae warning continues for Dexter Reservoir, Dorena Reservoir, and Fern Ridge Reservoir, and farther away at Devils Lake. Water monitoring has confirmed the presence of blue-green algae that can produce toxins, state public health officials said. The algae levels are likely associated with dangerous cyanotoxin concentrations in the water that can be harmful to humans and animals. Swallowing or inhaling water droplets, as well as skin contact with water, should be avoided according to the authorities.

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An upper level trough of low pressure (Shaded “U” shape offshore) is moving toward the Oregon coast to replace the high pressure ridge (Shaded “Arch” shape) that gave us way above normal temperatures. That trough will keep us in a wet weather pattern for most of this week. A cold front will be approaching the Oregon coast by the end of the week. Autumn begins at 1:44 PM next Sunday September 22nd, so Summer is nearly over.

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

• Cloudy with a good (50%) chance of showers tonight (under 0.10 in. of rain possible).
• Mostly cloudy with a (40%) chance of AM showers, a slight (20%) chance of showers Monday afternoon (under 0.10 in. of rain possible), a slight (20%) chance of showers late Monday night (under 0.10 in. of rain possible).
• Cloudy with a good (50%) chance of rain Tuesday AM, a good (50%) chance of showers in the afternoon (0.10 in. of rain possible), a (40%) chance of evening showers, mostly cloudy late Tuesday night and Wednesday AM, a mix of clouds and sun in the afternoon, then partly cloudy Wednesday night.
• lows 57-52 highs 70-66 warming to 73 Wednesday.
• Partly cloudy Thursday and in the evening, mostly cloudy with a (30%) chance of showers late Thursday night,
• A mix of clouds and sun with a good (50%) chance of rain Friday AM, cloudy with a good (50%) chance of rain in the afternoon, mostly cloudy with a (40%) chance of showers Friday night, a good (50%) chance of showers Saturday and Saturday night
• Mostly cloudy with a good (50%) chance of showers Sunday AM, then a good (50%) chance of rain Sunday afternoon.
• highs 80-69 lows near 55. (seasonal averages high 77 low 47)

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

• Mostly cloudy with patchy fog and a (30%) chance of showers tonight (under 0.10 in. of rain possible).
• Patchy AM fog, mostly cloudy with a slight (20%) chance of showers Monday afternoon (under 0.10 in. of rain possible), a (30%) chance of showers Monday night with patchy fog late at night (under 0.10 in. of rain possible),
• Mostly cloudy with a good (50%) chance of coastal showers Tuesday while AM showers likely (60%) inland and a (30%) chance of showers in the afternoon (under 0.10 in. of rain possible), a (30%) chance of showers in the evening, just mostly cloudy late Tuesday night.
• Partly cloudy Wednesday and Wednesday night.
• lows 57-53 highs 67-65 warming back to 67 Wednesday.
• Partly cloudy Thursday and Thursday evening, mostly cloudy with a slight (20%) chance of rain Thursday night,
• Mostly cloudy with a (30%) chance of AM rain, rain likely (60%) Friday afternoon, becoming cloudy with rain likely (60%) Friday evening, a good (50%) chance of rain late at night.
• Mostly cloudy with a good (50%) chance of rain Saturday, a (30%) chance of showers at night.
• Then mostly cloudy with a slight (20%) chance of showers Sunday.
• highs 67-64 warming to 67 Sunday lows 58.-55 (seasonal averages high 65 low 50)

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Forecast for the Cascades of Lane County:

• Mostly cloudy with a slight (20%) chance of thunderstorms this evening, a (40%) chance of showers and cooler late tonight.
• Mostly cloudy with a slight (20%) chance of AM showers, a mix of clouds and sun Monday with a slight (20%) chance of afternoon showers, a slight (20%) chance of showers late Monday night.
• Mostly cloudy with a (40%) chance of showers Tuesday AM, showers likely (60%) in the afternoon, a (40%) chance of showers in the evening, a slight (20%) chance of showers late Tuesday night.
• Mostly cloudy with a slight (20%) chance of showers Wednesday AM, then partly cloudy Wednesday afternoon and Wednesday night.
• snow level above 8,000 ft. late tonight through Tuesday, 6,500 ft. Tuesday night and Wednesday AM, free air freezing level 9,000 ft. in the afternoon, then 10,000 ft. rising to 11,000 ft. late Wednesday night.
• lows 45-36 warming to 42 Wednesday night highs 58-52 warming to near 60 Wednesday.
• Partly cloudy Thursday and Thursday evening, mostly cloudy with a (30%) chance of rain late Thursday night.
• A mix of clouds and sun Friday AM, cloudy with a good (50%) chance of showers in the afternoon, mostly cloudy with a good (50%) chance of showers in the evening, showers likely (60%) late Friday night.
• Mostly cloudy with showers likely (60%) Saturday and in the evening, a good (50%) chance of showers late Saturday night.
• A mix of clouds and sun with a good (50%) chance of AM showers, then rain likely (60%) Sunday afternoon.
• free air freezing level 11,000 ft. rising to 12,000 ft. Thursday afternoon and evening, snow level above 8,000 ft. late Thursday night through Friday evening, 8,000 ft. falling to 7,000 ft. late Friday night through Sunday.
• highs 71-55 lows 45-42.

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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 Eugene Daily News.com.

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