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Check out my latest Eugene Daily News Weather Or Not Column Whose Fault Is It? Could It Be El Nino, La Nina, Or Even La Nada?

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Here is my weekly weather quiz question. What is an “Alberta Clipper?” 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 FREEZE WARNING AND A FROST ADVISORY ARE IN EFFECT FROM 1 AM UNTIL 8 AM WEDNESDAY FOR THE KLAMATH BASIN, NORTHERN AND EASTERN KLAMATH COUNTY, AND FOR WESTERN, CENTRAL, AND EASTERN LAKE COUNTY. A FREEZE WATCH IS IN EFFECT FROM LATE WEDNESDAY NIGHT THROUGH THURSDAY MORNING FOR THE KLAMATH BASIN, NORTHERN AND EASTERN KLAMATH COUNTY, AND FOR WESTERN, CENTRAL, AND EASTERN LAKE COUNTY.

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 along with the Full Blue Moon (the full moon closest to the Autumnal Equinox), so Summer is nearly over.

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

• Showers likely (60%) with a slight (20%) chance of thunderstorms until late this AM, showers likely (70%) this afternoon (0.25 in. of rain possible, more in storms), a (40%) chance of evening showers, mostly cloudy with a slight (20%) chance of showers late tonight (under 0.10 in. of rain possible) and Wednesday AM, a mix of clouds and sun in the afternoon, mostly clear Wednesday night.
• Patchy AM fog and clouds, mostly sunny Thursday afternoon, then partly cloudy Thursday night, more patchy fog late.
• highs 67-78 lows 52-44 warming to 48 Thursday night.
• Patchy AM fog, mostly cloudy with a good (50%) chance of AM rain, rain Friday afternoon and evening, showers likely (60%) Friday night through Saturday evening, mostly cloudy with a slight (20%) chance of showers late Saturday night.
• Mostly cloudy with a good (50%) chance of rain Sunday and Sunday night,
• Then cloudy with a good (50%) chance of rain Monday.
• highs 70-66 warming to 70 Monday lows 55-50 warming to 55 Monday. (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 showers and a slight (20%) chance of isolated thunderstorms this AM, scattered showers this afternoon (under 0.10 in. of rain possible), partly cloudy with a slight (20%) chance of showers in the evening, just mostly cloudy late tonight.
• Partly cloudy Wednesday AM, sunny in the afternoon, mostly clear at night.
• Sunny Thursday, partly cloudy in the evening, mostly cloudy with a slight (20%) chance of rain late Thursday night,
• highs 65-68 lows near 53.
• Cloudy with a (30%) chance of AM rain, cloudy with rain and cooler Friday afternoon, then cloudy with rain likely (70%) in the evening and showers likely (60%) late Friday night.
• Mostly cloudy with showers likely (60%) Saturday AM, a (30%) chance of showers in the afternoon and Saturday night night.
• Mostly cloudy with a slight (20%) chance of AM showers Sunday, a (30%) chance of rain Sunday afternoon.
• Then cloudy with a (40%) chance of rain Monday.
• highs 66-63 warming to 66 Monday lows 58-55 warming to 57 Sunday night (seasonal averages high 65 low 50)

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Forecast for the Cascades of Lane County:

• Mostly cloudy with showers and a slight (20%) chance of thunderstorms today (0.25 in. of rain possible more in storms), a good (50%) chance of showers tonight (0.10 in. of rain possible).
• Partly cloudy Wednesday AM, mostly sunny and warmer in the afternoon, clear Wednesday night, mostly sunny and warmer Thursday, then partly cloudy Thursday night.
• snow level 8,000 ft. falling to 7,000 ft. late this afternoon, 6,500 ft. tonight, free air freezing level 8,000 ft. Wednesday, 10,000 ft. rising to 12,000 ft. Wednesday night, 13,000 ft. Thursday, then 12,000 ft. Thursday night.
• highs 52-70 lows 38-40.
• Partly cloudy Friday AM, becoming mostly cloudy with rain likely (60%) in the afternoon and evening, showers likely (60%) late Friday night through Saturday evening, a good (50%) chance of showers late Saturday night.
• Mostly cloudy with a good (50%) chance of rain Sunday, a slight (20%) chance of rain Sunday night, then cloudy with a good (50%) chance of rain Monday.
• free air freezing level 11,000 ft. Friday AM, snow level above 8,000 ft. Friday afternoon, 7,500 ft. late at night, 7,000 ft. Saturday through Sunday night, then 8,000 ft. Monday.
• highs 57-53 lows 42-38 warming to near 43 Sunday night.

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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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