Check out my latest Eugene Daily News Weather Or Not Column It’s Just Not The Same, And That’s Too Bad.

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Here is my new weekly weather quiz question. The city of San Francisco, CA has it’s own “air conditioner caused by upwelling. What is “upwelling” and how does it keep the area cool? 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 Tenmile Lakes in Coos County, Fern Ridge Reservoir, Lost Creek Lake,  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 (Shaded “U” shape) is sliding through the Pacific Northwest bringing colder air and some blustery conditions along with the chance of rain. Be prepared for the chance of wet weather Thursday so your “Trick-or-Treaters” stay warm and dry.

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

• Patchy AM fog, partly cloudy this afternoon, mostly clear with areas of frost and patchy fog late tonight and early Tuesday AM, mostly sunny Tuesday afternoon, partly cloudy with areas of frost and patchy fog late Tuesday night.
• Patchy AM fog, a mix of clouds and sun Wednesday afternoon, then becoming mostly cloudy with a slight (20%) chance of rain Wednesday night.
• highs near 55 lows 29-44.
• Mostly cloudy with a (40%) chance of rain Thursday (Halloween), a slight (20%) chance of rain Thursday night,
• Partly cloudy Friday, mostly cloudy with a sight (20%) chance of rain Friday night,
• Then mostly cloudy with a good (50%) chance of rain Saturday through Sunday.
• highs 57-60 cooling back to 54 Sunday lows near 40. (seasonal averages high 59 low 40)

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

• Partly cloudy late this AM, mostly sunny this afternoon, mostly clear with areas of frost and patchy fog late tonight,
• Patchy AM coastal fog while areas of morning frost and patchy fog inland, sunny Tuesday afternoon, mostly clear at night with patchy inland frost late Tuesday night,
• Partly cloudy with patchy frost Wednesday AM, mostly cloudy in the afternoon, then mostly cloudy with a slight (20%) chance of rain Wednesday night.
• highs 55-58 lows 36-45.
• Mostly cloudy with a (40%) chance of rain Thursday (Halloween), a slight (20%) chance of rain at night,
• Mostly sunny with a slight (20%) chance of rain Friday, mostly cloudy with a slight (20%) chance of rain at night,
• Then mostly cloudy with a good (50%) chance of rain Saturday through Sunday.
• highs 60-52 lows 45-49. (seasonal averages high 59 low 45)

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Forecast for the Cascades of Lane County:

• Cloudy with a good (50%) chance of AM rain and snow showers, breezy (wind: NE 10-20 mph), a mix of clouds and sun with a slight (20%) chance of rain and snow showers this afternoon, partly cloudy and colder tonight,
• Mostly sunny Tuesday, mostly clear at night,
• Partly cloudy Wednesday, mostly cloudy with a slight (20%) chance of rain Wednesday night.
• snow level 3,500 ft. today, free air freezing level 6,000 ft. falling to 5,500 ft. late tonight, 6,000 ft. rising to 8,000 ft. Tuesday afternoon, 9,000 ft. Tuesday night, 8,000 ft. Wednesday, then snow level 8,000 ft. Wednesday night.
• highs 36-50 lows 20-32.
• Mostly cloudy with a good (50%) chance of rain Thursday (Halloween), partly cloudy with a slight (20%) chance of showers at night,
• Partly cloudy Friday, partly cloudy with a slight (20%) chance of rain at night,
• Mostly cloudy with a good (50%) chance of rain Saturday, rain and snow showers likely (70%) at night,
• Then rain and snow showers likely (70%) Sunday.
• snow level 7,500 ft. Thursday, above 8,000 ft. Thursday night, free air freezing level 12,000 ft. Friday, snow level above 8,000 ft. Friday night, 7,000 ft. Saturday, 5,500 ft. at night, then 4,500 ft. Sunday.
• highs 47-53 cooling to 42 Sunday lows 32-28.