Here is my weekly weather quiz question for the last time. What are “Capillary Waves?” Here is the correct answer. Capillary Waves: waves caused by the initial wind stress on the water surface causes what are known as capillary waves. These have a wavelength of less than 1.73 cm, and the force that tries to restore them to equilibrium is the cohesion of the individual molecules. Capillary waves are important in starting the process of energy transfer from the air to the water. I’ll have a new weekly weather quiz question for you starting Monday. The first person to post the correct answer as a comment on this page will win a week of free personalized weather forecasts tailored to your needs.  Good luck.

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An Upper Level High Pressure Ridge (Shaded “Arch” shape with blue arrows) took over bringing sunshine and slightly warmer temperatures. An Upper Level Low Pressure Trough takes over Tuesday enhancing the rain chances again. The graphics for days 1-3 show the frontal system that approaches the Pacific Northwest Tuesday. The graphics for days 3-7 show complex frontal systems approaching Wednesday,  Friday, and Sunday.

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Air Quality Index:

Eugene-Springfield: The Air Quality Index is 36 in the Good category measuring Particulate Matter.

Oakridge: The Air Quality Index is 11 in the Good category measuring Particulate Matter.

Cottage Grove: The Air Quality Index is 51 in the Moderate category measuring Particulate Matter.

Data courtesy of Lane Regional Air Protection Agency (LRAPA)

 

 

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Advisories:

• A Health Advisory remains in effect for the Link and Klamath from Keno Dam to J.C. Boyle Dam (downstream from Keno Dam). Water monitoring has confirmed the presence of blue-green algae and the toxins they produce. These toxin concentrations can be harmful to humans and animals. People should always avoid areas with visible scum that looks foamy, scummy, thick like paint, pea-green, blue-green or brownish-red. Swimming and high-speed water activities such as water skiing or power boating where ingestion and inhalation exposure can occur is discouraged. Swallowing or inhaling water droplets as a result of these water activities in areas where a bloom has been identified, or an advisory issued, can expose people to the toxins being produced. Although toxins are not absorbed through the skin, people who have skin sensitivities that come into contact with a bloom may experience a puffy, red rash at the affected area.
• A Health Advisory remains in effect for Willow Creek Reservoir, located just east of the town of Heppner in Morrow County. Water monitoring has confirmed the presence of blue-green algae and the toxins they produce in the reservoir. These toxin concentrations can be harmful to humans and animals. People should always avoid areas with visible scum that looks foamy, scummy, thick like paint, pea-green, blue-green or brownish-red. Swimming and high-speed water activities such as water skiing or power boating where ingestion and inhalation exposure can occur is discouraged. Swallowing or inhaling water droplets as a result of these water activities in areas where a bloom has been identified, or an advisory issued, can expose people to the toxins being produced. Although toxins are not absorbed through the skin, people who have skin sensitivities that come into contact with a bloom may experience a puffy, red rash at the affected area. Drinking water directly from Willow Creek Reservoir at this time is especially dangerous. OHA Public Health Division officials advise campers and other recreational visitors that toxins cannot be removed by boiling, filtering or treating water with camping-style filters.
• A Health Advisory remains in effect for Howard Bay (also known locally as Howards Bay or Howard’s Bay), located in the southwest corner of Upper Klamath Lake including Shoalwater Bay to the north and all of Upper Klamath Lake. These areas of Upper Klamath Lake are located off Oregon Route 140, 15 miles west of Klamath Falls in Klamath County. Water monitoring has confirmed the presence of blue-green algae and the toxins they produce in Howard Bay. These toxin concentrations can be harmful to humans and animals. People should always avoid areas with visible scum that looks foamy, scummy, thick like paint, pea-green, blue green or brownish red. Swimming and high-speed water activities such as water skiing or power boating where ingestion and inhalation exposure can occur is discouraged. Swallowing or inhaling water droplets as a result of these water activities in areas where a bloom has been identified, or an advisory issued, can expose people to the toxins being produced. Although toxins are not absorbed through the skin, people who have skin sensitivities that come into contact with a bloom may experience a puffy, red rash at the affected area. Drinking water directly from Howard Bay and Shoalwater Bay at this time is especially dangerous. OHA Public Health Division officials advise campers and other recreational visitors that toxins cannot be removed by boiling, filtering or treating water with camping-style filters.
• A Health Advisory remains in effect for Agency Lake, located just north of Klamath Falls along U.S. Highway 97 in Klamath County. Water monitoring has confirmed the presence of blue-green algae and the toxins they produce in the lake. These toxin concentrations can be harmful to humans and animals. People should always avoid areas with visible scum that looks foamy, scummy, thick like paint, pea-green, blue green or brownish red. Swimming and high-speed water activities such as water skiing or power boating where ingestion and inhalation exposure can occur is discouraged. Swallowing or inhaling water droplets as a result of these water activities in areas where a bloom has been identified, or an advisory issued, can expose people to the toxins being produced. Although toxins are not absorbed through the skin, people who have skin sensitivities that come into contact with a bloom may experience a puffy, red rash at the affected area. Drinking water directly from Agency Lake at this time is especially dangerous. OHA Public Health Division officials advise campers and other recreational visitors that toxins cannot be removed by boiling, filtering or treating water with camping-style filters.
• A Health Advisory remains in effect for Willow Creek Reservoir, located just east of the town of Heppner in Morrow County. Water monitoring has confirmed the presence of blue-green algae and the toxins they produce in the reservoir. These toxin concentrations can be harmful to humans and animals. People should always avoid areas with visible scum that looks foamy, scummy, thick like paint, pea-green, blue green or brownish red. Swimming and high-speed water activities such as water skiing or power boating where ingestion and inhalation exposure can occur is discouraged. Swallowing or inhaling water droplets as a result of these water activities in areas where a bloom has been identified, or an advisory issued, can expose people to the toxins being produced. Although toxins are not absorbed through the skin, people who have skin sensitivities that come into contact with a bloom may experience a puffy, red rash at the affected area. Drinking water directly from Willow Creek Reservoir at this time is especially dangerous. OHA Public Health Division officials advise campers and other recreational visitors that toxins cannot be removed by boiling, filtering or treating water with camping-style filters.
• A Health Advisory remains in effect for Coffenbury Lake, located at Fort Stevens State Park about five miles northwest of US-101 ALT, Northwest Ridgefield Road near Warrenton in Clatsop County. Water monitoring has confirmed the presence of blue-green algae that can produce toxins in Coffenbury Lake. These blue-green algae levels are likely to be associated with dangerous cyanotoxin concentrations in the water that can be harmful to humans and animals.  People should always avoid areas with visible scum that looks foamy, scummy, thick like paint, pea-green, blue-green or brownish-red. Swimming and high-speed water activities such as water skiing or power boating where ingestion and inhalation exposure can occur are discouraged. Swallowing or inhaling water droplets as a result of these water activities in areas where a bloom has been identified or an advisory issued, can expose people to the toxins that can be produced. Although toxins are not absorbed through the skin, people with skin sensitivities who come into contact with a bloom may experience a puffy, red rash at the affected area. Drinking water directly from Coffenbury Lake at this time is especially dangerous. OHA Public Health Division officials advise campers and other recreational visitors that toxins cannot be removed by boiling, filtering or treating water with camping-style filters.
• A Permanent Health Advisory remains in effect for the South Umpqua River and Lawson Bar. Pools in the bedrock along the rivers edge are known to develop Blue-green Algae (cyanobacterial) blooms that can be harmful to pets and people if accidental ingestion occurs. Signs have been posted along several access areas along the river.

 

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Your College Football Forecast:

Saturday October 28th:

Ducks vs Utah, at Autzen Stadium – Kickoff: Time Yet To Be Determined PDT – Too early for a preliminary weather forecast.

Thursday October 26th:

Beavers vs Stanford, at Reser Stadium – Kickoff: 6:00 PM PDT – Too early for a preliminary weather forecast.

 

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

• Mostly clear with patchy fog late tonight,
• Patchy AM fog, partly cloudy and warmer Monday afternoon and at night,
• A mix of clouds and sun and a bit cooler Tuesday with with a slight (20%) chance of AM rain, a good (50%) chance of rain in the afternoon, mostly cloudy with a (40%) chance of rain Tuesday night (under 0.10 in. of rain possible),
• Mostly cloudy with a slight (20%) chance of rain Wednesday and at night.
• lows 40-49 cooling to 47 Wednesday night highs 68-66 warming back to 68 Wednesday.
• Rain likely (70%) and a bit cooler Thursday, rain Thursday night,
• Mostly cloudy and a bit cooler with showers likely (70%) Friday, a good (50%) chance of showers at night,
• Cloudy with a good (50%) chance of rain and a bit warmer Saturday, a (30%) chance of showers Saturday night,
• Then just mostly cloudy and a bit warmer Sunday.
• highs 58-56 warming to 64 Sunday lows 46-43 warming to 52 Saturday night. (seasonal averages high 64 low 41)

 

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Forecast for Roseburg:

• Mostly clear tonight,
• AM clouds, sunny and a bit warmer Monday afternoon, mostly clear in the evening, partly cloudy at night and Tuesday AM, sunny and a bit cooler in the afternoon, partly cloudy in the evening, mostly cloudy late Tuesday night,
• Mostly cloudy with a slight (20%) chance of rain Wednesday and at night.
• lows 42-47 highs 77-72.
• Cloudy and a bit cooler with a (30%) chance of rain Thursday, rain late at night,
• Cloudy with showers likely (70%) and a bit cooler Friday, mostly cloudy with a slight (20%) chance of showers Friday night,
• Cloudy with a (40%) chance of AM showers, a (30%) chance of rain Saturday afternoon, mostly cloudy with a slight (20%) chance of showers at night,
• Then just mostly cloudy and a bit warmer Sunday.
• highs 65-58 warming to 66 Sunday lows 46-44 warming to 47 Saturday night. (seasonal averages high 66 low 45)

 

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Forecast for The South Oregon Coast Including Coos Bay and North Bend:

• Mostly clear tonight,
• Sunny and a bit warmer today and Monday, mostly clear in the evening, partly cloudy late Monday night,
• Partly cloudy and a bit cooler Tuesday and in the evening, mostly cloudy at night,
• Mostly cloudy and a bit warmer with a slight (20%) chance of rain Wednesday, a (40%) chance of rain Wednesday night.
• lows 47-49 highs 65-62 warming to 64 Wednesday.
• Mostly cloudy with rain and a bit cooler Thursday and Thursday night,
• Showers likely (60%) Friday, and a bit cooler a slight (20%) chance of showers at night,
• Cloudy and a bit warmer with a good (50%) chance of showers Saturday, mostly cloudy with a slight (20%) chance of showers Saturday night,
• Then mostly cloudy Sunday.
• highs 62-58 warming to 63 Sunday lows 50-53. (seasonal averages high 61 Low 46)

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Forecast for the Cascades in Lane County:

• Mostly clear tonight,
• Mostly sunny and a bit warmer Monday, mostly clear at night,
• Partly cloudy and a bit cooler Tuesday with a slight (20%) chance of rain in the afternoon and Tuesday night,
• A mix of clouds and sun Wednesday, then mostly cloudy at night.
• free air freezing level 13,000 ft. tonight through Monday night, snow level above 8,000 ft. Tuesday and Tuesday night, then free air freezing level 11,000 ft. Wednesday and Wednesday night.
• lows near 40 highs 62-55.
• Cloudy and a bit cooler with a (40%) chance of rain Thursday, rain at night,
• Cloudy with rain and snow showers likely (70%) and a bit cooler Friday, mostly cloudy with a good (50%) chance of rain and snow showers Friday night and Saturday (a bit warmer), mostly cloudy with a good (50%) chance of rain and snow showers Saturday night,
• Then a mix of clouds and sun and a bit warmer Sunday.
• snow level above 8,000 ft. Thursday, 7,000 ft. Thursday night, 4,500 ft. Friday, 4,000 ft. Friday night, 4,500 ft Saturday, 8,000 ft. Saturday night, then free air freezing level 11,000 ft. Sunday.
• highs 48-38 warming to 49 Sunday lows 33-30 warming to 36 Saturday 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 eugenedailynews.com.

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