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Check out my latest Eugene Daily News Weather Or Not Column Ahoy There, Matey!

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And don’t forget my latest feature story in the continuing series on service club organizations called “Buffalo Isn’t Only Known For Its Wings.”

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Sorry, no winner this week. Here is my weekly weather quiz question for the last time. What is “anomalous propagation?” Here is the correct answer. ANOMALOUS PROPAGATION (AP) –Non-standard atmospheric temperature or moisture gradients will cause all or part of the radar beam to propagate along a non-normal path. When non-standard index-of-refraction distributions prevail, “abnormal” or “anomalous” propagation occurs. When abnormal downward bending occurs, it is called “superrefraction.” If the beam is refracted downward sufficiently, it will illuminate the ground and return signals to the radar from distances further than is normally associated with ground targets. The term “subrefraction” is applied when there is abnormal upward bending of the radar beam. 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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An upper level high pressure ridge (Shaded “Arch” shape with blue arrows) is moving eastward away from us and the airflow is coming from the west. The onshore airflow is bringing more clouds our way. A frontal system will bring the chance of rain this morning into early afternoon. Another frontal system will push through the Pacific Northwest Tuesday bringing increased chances for rain.

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Air Quality Index:

Eugene-Springfield: The Air Quality Index is 20 in the Good category measuring Particulate Matter at Springfield City Hall. Data courtesy of Lane Regional Air Protection Agency (LRAPA)

Oakridge: The Air Quality Index is 28 in the Good category measuring Particulate Matter at Willamette Activity Center, Oakridge. Data courtesy of Lane Regional Air Protection Agency (LRAPA)

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Advisories:

• A HEALTH ADVISORY HAS BEEN ISSUED FOR THE PRESENCE OF BLUE-GREEN ALGAE IN WILLOW CREEK RESERVOIR IN MORROW COUNTY. THE TOXIC ALGAE BLOOM MEANS THAT PEOPLE SHOULD NOT DRINK OR HAVE DIRECT CONTACT WITH THE AFFECTED WATER AND THAT ALSO GOES FOR ANY PETS.
• THE HEALTH ADVISORIES ISSUED FOR THE PRESENCE OF BLUE-GREEN ALGAE IN CULLABY LAKE JUST OFF HWY 101 BETWEEN ASTORIA AND SEASIDE IN CLATSOP COUNTY OREGON, WALTERVILLE POND IN LANE COUNTY AND THE LOWER WILLAMETTE RIVER FROM THE SOUTH END OF ROSS ISLAND DOWNSTREAM TO THE SOUTH END OF SAUVIE ISLAND IN MULTNOMA COUNTY HAVE BEEN LIFTED.
• A HEALTH ADVISORY CONTINUES FOR THE PRESENCE OF BLUE-GREEN ALGAE IN WICKIUP RESERVOIR IN DESCHUTES COUNTY, 40 MILES SW OF BEND, FOR TENMILE LAKES IN COOS COUNTY, AND AT DEVILS LAKE IN LINCOLN COUNTY. THE TOXIC ALGAE BLOOM MEANS THAT PEOPLE SHOULD NOT DRINK OR HAVE DIRECT CONTACT WITH THE AFFECTED WATER AND THAT ALSO GOES FOR ANY PETS.

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

• Mostly cloudy with occasional rain likely this AM, a mix of clouds and sun this afternoon with a slight (20%) chance of showers, partly cloudy with patchy fog late tonight,
• Patchy AM fog, a mix of clouds and sun Sunday afternoon, partly cloudy with patchy fog late Sunday night,
• More clouds to mostly cloudy with patchy AM fog Monday (Columbus Day), then becoming mostly cloudy with rain Monday night.
• highs near 70 lows 44-42 rising to 49 Monday night.
• Mostly cloudy with rain Tuesday, showers Tuesday night and Wednesday, cloudy with a good (50%) chance of showers Wednesday night,
• Mostly cloudy with showers likely (70%) Thursday, then rain Thursday night and Friday.
• highs 60-66 lows 45-48. (seasonal averages high 67 low 42).

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Forecast for the Umpqua Basin including Roseburg:

• Mostly cloudy with patchy rain and drizzle this AM, a slight (20%) chance of rain and drizzle early this afternoon, partly cloudy tonight,
• Patchy AM fog, partly cloudy Sunday and in the evening, mostly clear Sunday night,
• Mostly cloudy Monday (Columbus Day), mostly cloudy with a good (50%) chance of evening rain, rain late Monday night.
• highs 72-75 lows 46-52.
• Rain and cooler Tuesday, rain Tuesday night,
• Showers Wednesday, showers likely (60%) Wednesday night,
• Mostly cloudy with rain likely (70%) Thursday, then rain Thursday  night and Friday.
• highs 62-64 lows 46-52. (seasonal averages high 70 low 46)

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

• Mostly cloudy with patchy AM fog and a slight (20%) chance of light rain and drizzle this morning, a slight (20%) chance of rain early this afternoon, partly cloudy this evening, mostly cloudy with patchy fog late tonight,
• Mostly cloudy with patchy AM fog Sunday, partly cloudy in the evening, mostly clear late Sunday night,
• Mostly cloudy Monday (Columbus Day), mostly cloudy with a slight (20%) chance of evening rain, then rain late Monday night.
• highs 65-68 cooling to 66 Monday lows near 53.
• Mostly cloudy with rain and cooler Tuesday, rain at night,
• Showers Wednesday, showers likely (70%) Wednesday night,
• Mostly cloudy with rain likely (70%) Thursday, then rain Thursday night and Friday.
• highs 60-62 lows 52-54. (seasonal averages high 62 low 46)

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Forecast for the Cascades in Lane County:

• Mostly cloudy with a (30%) chance of rain this AM, slight (20%) chance of showers this afternoon, partly cloudy with a slight (20%) chance of showers in the evening, just partly cloudy late tonight through Sunday night,
• A mix of clouds and sun Monday (Columbus Day), becoming cloudy with rain likely (70%) late at night.
• snow level above 8,000 ft. today and tonight, free air freezing level 11,000 ft. Sunday, 12,000 ft. Sunday night, 13,000 ft. Monday, snow level above 8,000 ft. Monday night.
• highs 59-66 lows near 37.
• Rain Tuesday, showers Tuesday night,
• Showers Wednesday, showers likely (70%) at night,
• Mostly cloudy with a good (50%) chance of showers Thursday, then rain likely (70%) Thursday night and Friday.
• snow level 7,500 ft. Tuesday, 6,500 ft. Tuesday night, 5,000 ft. Wednesday, 5,500 ft.  Wednesday night and Thursday, then above 8,000 ft. Thursday night and Friday.
• highs 52-55 lows 33-30.

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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 EugeneDailyNews.com.

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