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Check out my latest Eugene Daily News Weather Or Not Column It’s That Time Again And I Have Too Many Digital Clocks To Change.

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Here is my new weekly weather quiz question. What determines if a tropical storm becomes a hurricane? 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 NEW Blue-Green Algae warning has been issued for Tenmile Lakes in Coos County. A Blue-Green Algae warning has been lifted for Walterville Pond, Dorena Reservoir and Dexter Reservoir,  but continues for Fern Ridge Reservoir and  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 low will be moving over us bringing back the chance of showers. A frontal system has pushed through the Pacific Northwest bringing cooler air and enhancing the chance of showers. Another frontal system will approach Oregon late in the week

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

• Partly cloudy with a slight (20%) chance of showers tonight (under 0.10 in. of rain possible),
• Mostly cloudy with a good (50%) chance of showers Tuesday AM, showers likely (60%) in the afternoon and evening (small hail possible, 0.25 in. of rain possible), partly cloudy and colder with patchy fog late Tuesday night (under 0.10 in. of rain possible),
• Partly cloudy with patchy fog Wednesday AM, mostly sunny in the afternoon, partly cloudy Wednesday night,
• A mix of clouds and sun Thursday, then partly cloudy at night,
• lows 44-37 warming to 40 Thursday night highs 56-63.
• Partly cloudy Friday, partly cloudy with a slight (20%) chance of showers at night,
• A mix of clouds and sun with a (40%) chance of showers Saturday, a slight (20%) chance of showers Saturday night,
• Then just partly cloudy Sunday through Monday (Columbus Day).
• highs near 60 lows near 42. (seasonal averages high 69 low 43)

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

• Partly cloudy a slight (20%) chance of coastal showers early this evening, mostly cloudy late tonight (under 0.10 in. of rain possible).
• Mostly cloudy with a (30%) chance of showers Tuesday (under 0.10 in. of rain possible), mostly cloudy in the evening and partly cloudy with a good (50%) chance of showers Tuesday night (under 0.10 in. of rain possible).
• Sunny Wednesday, partly cloudy in the evening and mostly cloudy with patchy fog late Wednesday night.
• Patchy AM fog, partly cloudy with a slight (20%) chance of rain Thursday night.
• lows 49-44 warming to 47 Wednesday night highs 60-62.
• Partly cloudy Friday, mostly cloudy at night,
• Mostly cloudy with a slight (20%) chance of showers Saturday, then partly cloudy  Saturday night through Monday (Columbus Day)
• highs 62-65 lows 45-48. (seasonal averages high 62 low 47)

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Forecast for the Cascades of Lane County: