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) is taking 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 3-7 show complex frontal systems approaching Tuesday, Wednesday and Friday and  another frontal system taking shape next Saturday.

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Air Quality Index:

Eugene-Springfield: The Air Quality Index is 47 in the Good category measuring Particulate Matter.

Oakridge: The Air Quality Index is 25 in the Good category measuring Particulate Matter.

Cottage Grove: The Air Quality Index is 12 in the Good 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:

Ducks vs Stanford, at Stanford Stadium – Kickoff: 8:00 PM PDT – Clear 65, cooling as the game progresses, Wind N 5 mph.

Beavers vs Colorado, at Reser Stadium – Kickoff: 1:00 PM PDT – Mostly sunny 58, warming to 62 then starting to cool by the end of the game, Wind N 5-10 mph.

 

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

• Mostly sunny and a bit warmer this afternoon, clear tonight,
• Patchy AM and late night fog, mostly sunny and a bit warmer Sunday and Monday, mostly clear both nights.
• highs 62-66 lows 36-44.
• A mix of clouds and sun and a bit cooler with a slight (20%) chance of rain Tuesday, mostly cloudy with a (40%) chance of rain Tuesday night,
• Mostly cloudy and a bit warmer with rain likely (70%) Wednesday, rain at night,
• Rain and a bit cooler Thursday, rain likely (70%) Thursday night,
• Then cloudy and a bit cooler with a good (50%) chance of showers Friday.
• highs 62-54 lows 47-43. (seasonal averages high 65 low 41)

 

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Forecast for Roseburg:

• Sunny and a bit warmer this afternoon, clear with patchy frost late tonight and Sunday AM, sunny and a bit warmer Sunday, mostly clear Sunday night,
• Sunny and a bit warmer Monday, then mostly clear at night.
• highs 64-77 lows 37-45.
• Partly cloudy and a bit cooler and Tuesday night,
• Mostly cloudy with a (40%) chance of rain and a bit cooler Wednesday, a good (50%) chance of rain Wednesday night,
• Mostly cloudy and a bit cooler with rain Thursday and at night,
• Then rain likely (70%) Friday.
• highs 72-56 lows 46-48 cooling to 42 Thursday night. (seasonal averages high 67 low 45)

 

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

• Sunny and a bit warmer this afternoon, clear tonight,
• Then sunny and a bit warmer Sunday and Monday, clear both nights,
• highs 62-66 lows 45-48.
• Partly cloudy and a bit cooler  Tuesday, mostly cloudy Tuesday night,
• Cloudy and a bit cooler with a slight (20%) chance of rain Wednesday, rain likely (70%) and breezy at night,
• Rain and a bit cooler Thursday and Thursday night,
• Then showers likely (60%) Friday.
• highs 63-56 lows 50-46. (seasonal averages high 61 low 46)

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Forecast for the Cascades in Lane County:

• Mostly sunny and a bit warmer today, Sunday, and Monday, clear to mostly clear each night,
• free air freezing level 6,500 ft. rising to 9,000 ft. this afternoon, 10,000 ft. rising to 11,000 ft. late tonight, 12,000 ft. Sunday, 13,000 ft. falling to 12,000 ft. Sunday night, then 12,000 ft. Monday and Monday night.
• highs 45-57 lows 32-38.
• Partly cloudy and a bit cooler with a slight (20%) chance of rain Tuesday and Tuesday night,
• Cloudy with a good (50%) chance of rain Wednesday, rain and a bit cooler Wednesday night (breezy) and Thursday, rain and snow Thursday night,
• Then rain and snow showers likely (70%) and a bit cooler Friday.
• snow level above 8,000 ft. Tuesday, 8,000 ft. Tuesday night, above 8,000 ft. Wednesday and Wednesday night, 7,000 ft. Thursday, then 5,500 ft. Thursday night, then 4,500 ft. Friday.
• highs 49-33 lows 36-29.

 

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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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