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 weekly weather quiz question for the last time. 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? Upwelling in ocean dynamics, the upward motion of sub-surface water toward the surface of the ocean. This is often a source of cold, nutrient-rich water. Strong upwelling occurs along the equator where easterly winds are present. Upwelling also can occur along coastlines, and is important to fisheries and birds in California and Peru. Upwelling off San Francisco keeps replacing the warmer surface water with colder water from the depths and thus breezes blowing from the ocean have a cooling effect on the land. 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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ADVISORIES:

• A WINTER WEATHER ADVISORY IS IN EFFECT UNTIL 6 PM SUNDAY FOR  THE NORTH OREGON CASCADES AND THE CASCADES OF LANE COUNTY.

A Blue-Green Algae warning continues for Tenmile Lakes in Coos County, Fern Ridge Reservoir, Lost Creek Lake,  Devils Lake and Willow Creek Reservoir (NE Oregon). 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) will keep us in clouds and rain for a while. A frontal system has moved through the Pacific Northwest, pushed by the upper low, ushering in the colder wetter weather. Don’t forget that this is the weekend when we “Fall Back” and turn our clocks back one hour to return to Standard Time. The official time is 2 AM Sunday, but bedtime tonight is when most people set their clocks. The local firefighters recommend that you check the batteries in your smoke alarms, Co2 detectors, and Radon gas detectors to make sure they are functioning properly.

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

• Cloudy with showers and a slight (20%) chance of a thunderstorm this evening (0.10 in. of rain possible),
• Showers likely (70%) Sunday (0.10 in. of rain possible), mostly cloudy with a good (50%) chance of showers Sunday night (0.10 in. of rain possible),
• Cloudy with a (40%) chance of AM rain, rain likely (60%) Monday afternoon (0.15 in. of rain possible), rain at night (0.20 in. of rain possible),
• Cloudy with a good (50%) chance of showers Tuesday, then mostly cloudy with a good (50%) chance of showers Tuesday night.
• lows near 42 highs 50-54.
• Mostly cloudy with a slight (20%) chance of rain Wednesday, a good (50%) chance of rain at night,
• Rain likely (60%) Thursday and Thursday night,
• Mostly cloudy with a good (50%) chance of showers Friday and Friday night,
• Then mostly cloudy with rain likely (60%) Saturday.
• highs 53-49 lows 42-38. (seasonal averages high 58 low 40)

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

• Mostly cloudy with scattered coastal showers this evening and increasing showers late tonight while increasing showers inland tonight (0.15 in. of rain possible),
• Showers likely (70%) Sunday (0.15 in. of rain possible), a (40%) chance of showers Sunday night (under 0.10 in. of rain possible),
• Mostly cloudy with a (30%) chance of rain Monday (under 0.10 in. of rain possible), evening coastal rain likely (70%), with rain at night while rain likely (70%) inland Monday night (0.20 in. of rain possible),
• Mostly cloudy with showers likely (70%) Tuesday, then a (40%) chance of showers Tuesday night.
• lows 44-42 warming to 47 Monday night and Tuesday night highs 53-55.
• Mostly cloudy with areas of fog and a slight (20%) chance of rain Wednesday, cloudy with a good (50%) chance of rain at night,
• Rain Thursday, rain likely (60%) Thursday night,
• Then mostly cloudy with showers likely (60%) Friday through Saturday.
• highs 57-52 lows 46-38. (seasonal averages high 59 low 45)

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Forecast for the Cascades of Lane County:

• Mostly cloudy with rain and snow showers and colder tonight (0.50 in. of rain possible, 4-7 in. of snow possible),
• Rain and snow showers Sunday (0.25 in. of rain possible, 2-4 in. of snow possible), rain and snow showers likely (60%) in the evening, a good (50%) chance of rain and snow showers late Sunday night,
• Cloudy with a good (50%) chance of rain and snow Monday, rain and snow at night,
• Cloudy with a good (50%) chance of showers Tuesday, then rain and snow showers likely (60%) Tuesday night.
• snow level 3,500 ft. tonight, 3,000 ft. Sunday, 3,500 ft. Sunday night and Monday, then 5,000 ft. Monday night, 6,000 ft. Tuesday, then 5,500 ft. Tuesday night.
• lows 28-32 highs 30-38.
• Mostly cloudy with a (40%) chance of rain and snow Wednesday, a good (50%) chance of rain at night,
• Rain Thursday, rain and snow likely (60%) Thursday night,
• Mostly cloudy with a good (50%) chance of rain and snow showers Friday, rain and snow showers likely (60%) at night,
• Then rain and snow showers Saturday.
• snow level 5,500 ft. Wednesday, 6,000 ft. at night, 6,500 ft. Thursday, 4,500 ft. Thursday night, 4,000 ft. Friday, 4,500 ft. at night, then 3,500 ft. Saturday.
• highs 42-32 lows 32-25.