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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 along with a frontal system that moved through Saturday. 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 18 in the Good category measuring Particulate Matter at Amazon Park, Eugene. Data courtesy of Lane Regional Air Protection Agency (LRAPA)

Oakridge: The Air Quality Index is 20 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:

• Patchy AM fog, a mix of clouds and sun this afternoon, partly cloudy with patchy fog late tonight,
• More clouds to mostly cloudy with patchy AM fog Monday (Columbus Day), then mostly cloudy with rain Monday night (0.40 in. of rain possible) and Tuesday, then showers Tuesday night.
• highs 69-63 lows 42-48.
• Mostly cloudy with showers and a slight (20%) chance of thunderstorms Wednesday, cloudy with a good (50%) chance of showers Wednesday night,
• Mostly cloudy with showers likely (70%) Thursday, rain Friday and Friday night,
• Then showers likely (70%) Saturday.
• highs 60-65 lows near 46. (seasonal averages high 66 low 42).

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Forecast for the Umpqua Basin including Roseburg:

• Mostly cloudy with patchy AM fog, mostly sunny this afternoon, mostly clear tonight,
• Mostly sunny Monday (Columbus Day), becoming mostly cloudy with a good (50%) chance of evening rain, rain late Monday night (0.15 in. of rain possible) and Tuesday (cooler), then rain Tuesday night.
• highs 74-62 lows 43-52 cooling to 48 Tuesday night.
• Showers Wednesday, mostly cloudy with showers likely (60%) Wednesday night and Thursday, showers likely (70%) Thursday night,
• Mostly cloudy with rain Friday and Friday night,
• Then a (40%) chance of showers Saturday.
• highs 62-68 lows 49-52. (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 fog this AM, sunny this afternoon, mostly clear late tonight,
• Mostly cloudy Monday (Columbus Day), becoming mostly cloudy with rain likely (70%) in the evening, then rain late Monday night (0.55 in. of rain possible.) through Tuesday night.
• highs 68-60 lows 50-54 cooling to near 52 Tuesday night.
• Mostly cloudy with showers Wednesday, showers likely (60%) Wednesday night,
• Cloudy with a (50%) chance of showers Thursday, showers likely (60%) Thursday night,
• Rain Friday and Friday night,
• Then cloudy with a (40%) chance of showers Saturday.
• highs 60-64 lows 52-54. (seasonal averages high 62 low 46)

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Forecast for the Cascades in Lane County:

• Partly cloudy today and tonight,
• Mostly sunny Monday (Columbus Day), becoming cloudy with a slight (20%) chance of evening rain, rain likely (70%) late at night,
• Mostly cloudy with rain Tuesday, then showers Tuesday night.
• free air freezing level 10,000 ft. today, 12,000 ft. tonight, 13,000 ft. Monday, snow level above 8,000 ft. Monday night, 7,500 ft. Tuesday, then 6,500 ft. Tuesday night.
• highs 62-67 cooling to 54 Tuesday lows 36-32.
• Mostly cloudy with rain and snow showers Wednesday, rain and snow showers likely (60%) Wednesday night,
• Mostly cloudy with a good (50%) chance of rain Thursday, rain likely (70%) Thursday night through Friday night,
• Then showers likely (60%) Saturday.
• snow level 5,000 ft. Wednesday, 5,500 ft. Wednesday night and Thursday, then above 8,000 ft. Thursday night through Saturday.
• highs 48-55 lows 33-30 rising back to 33 Saturday.

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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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