Here is my weekly weather quiz question for the last time. What is a “Brocken Specter?” Here is the correct answer. A Brocken Specter is an optical phenomenon sometimes occurring at high altitudes when the image of an observer placed between the sun and a cloud is projected on the cloud as a greatly magnified shadow. The shadow’s head is surrounded by rings of color, called a glory. 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 sending a frontal system toward us. The graphic for days 1-3 show that frontal system moving in Monday. The graphics for days 3-7 show a complex frontal system moving in between Friday and Saturday with another poised to approach the Pacific Northwest by early next week.

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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 23 in the Good category measuring Particulate Matter.

Cottage Grove: The Air Quality Index is 33 in the Good category measuring Ozone.

Data courtesy of Lane Regional Air Protection Agency (LRAPA)

 

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Advisories:

• A Health Advisory has been issued for the Link and Klamath rivers to 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. 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.
• The Oregon Health Authority issued a Health Advisory 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.
• The Oregon Health Authority has updated the Health Advisory issued July 28 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 now 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:

September 30th:

Ducks vs California, at Autzen Stadium – Kickoff: 7:30 PM PDT – Too soon for a preliminary weather forecast.

Beavers vs Washington, at Reser Stadium – Kickoff: 5:00 PM PDT – Too soon for a preliminary weather forecast.

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

• Partly cloudy with patchy fog tonight,
• Mostly cloudy with patchy AM fog, mostly cloudy Monday afternoon, becoming cloudy with a slight (20%) chance of evening rain, just mostly cloudy late at night,
• AM clouds and sun, mostly sunny and a bit warmer Tuesday afternoon, mostly clear Tuesday night,
• Sunny and a bit warmer Wednesday, then mostly clear Wednesday night.
• lows 50-53 highs 72-82.
• Mostly sunny and a bit cooler Thursday, clear in the evening, partly cloudy late Thursday night,
• Then partly cloudy and a bit cooler Friday through Sunday.
• highs 82-72 lows 54-50. (seasonal averages high 74 low 45)

 

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Forecast for Roseburg:

• Mostly clear this evening, mostly cloudy late tonight,
• Partly cloudy in the AM, mostly cloudy Monday afternoon, mostly cloudy in the evening, partly cloudy late Monday night and Tuesday AM, sunny and a bit warmer Tuesday afternoon, then mostly clear at night.
• lows 50-54 highs 75-80.
• Mostly sunny and a bit warmer Wednesday and Thursday, mostly clear both nights,
• Partly cloudy and a bit cooler Friday and Friday night,
• Then partly cloudy Saturday through Sunday.
• highs 86-79 lows 54-56. (seasonal averages high 76 low 50)

 

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

• Partly cloudy with patchy coastal fog this evening, mostly cloudy late tonight and Monday AM, partly cloudy and a bit warmer in the afternoon, mostly cloudy in the evening, party cloudy late Monday night with patchy coastal fog,
• Mostly cloudy with areas of coastal AM fog and frizzle, sunny and a bit warmer Tuesday afternoon, mostly clear at night,
• Patchy AM fog,  sunny and a bit warmer Wednesday afternoon, then mostly clear Wednesday night.
• lows 53-57 highs 67-76.
• Mostly sunny and a bit cooler Thursday, partly cloudy at night,
• Partly cloudy and a bit cooler Friday through Saturday night,
• Then partly cloudy and a bit warmer Sunday.
• highs 72-64 warming to 66 Sunday lows 54-52. (seasonal averages high 64 low 49)

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Forecast for the Cascades in Lane County:

• Partly cloudy tonight,
• A mix of clouds and sun and a bit warmer Monday, cloudy in the evening, partly cloudy late Monday night and Tuesday AM, mostly sunny and a bit warmer Tuesday afternoon, clear at night,
• Sunny and a bit warmer Wednesday, then mostly clear Wednesday night.
• free air freezing level 10,000 ft. tonight and Monday, 11,000 ft. rising to 12,000 ft. late Monday night, 13,000 ft. rising to 14,000 ft. Tuesday afternoon, 14,000 ft. Tuesday night, 14,000 ft. rising to 15,000 ft. Wednesday, then 14,000 ft. Wednesday night.
• lows 42-46 highs 58-68.
• Mostly sunny and a bit warmer Thursday, mostly clear at night,
• Mostly sunny Friday AM, partly cloudy and a bit cooler in the afternoon and Friday night,
• Partly cloudy in the AM, mostly sunny Saturday afternoon, partly cloudy at night,
• Mostly sunny Sunday AM, then partly cloudy and a bit cooler Sunday afternoon.
•  free air freezing level 14,000 ft. Thursday, 14,000 ft. falling to 13,000 ft. late Thursday night, 13,000 ft. Friday through Saturday, 13,000 ft. rising to 15,000 ft. late Saturday night, then 15,000 ft. Sunday.
• highs 69-63 lows 47-42.

 

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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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