Here is my new weekly weather quiz question. What is a “Bow Echo?” 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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The graphics for days 1-3 show the cold front that’s moving through Oregon today. An Upper Level Low Pressure Trough (Shaded “U” shape with blue arrows) will return marine airflow to the Willamette Valley for a while cooling us down. The graphics for days 3-7 show a frontal system that will push through the Pacific Northwest Sunday night into Monday.

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Air Quality Index:

Eugene-Springfield: The Air Quality Index is 24 in the Good category measuring Particulate Matter.

Oakridge: The Air Quality Index is 30 in the Good category measuring Particulate Matter.

Cottage Grove: The Air Quality Index is 24 in the Good category measuring Ozone.

Data courtesy of Lane Regional Air Protection Agency (LRAPA)

 

 

 

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Advisories:

• AN AIR QUALITY ALERT IS IN EFFECT UNTIL 10 AM FRIDAY FOR HOOD RIVER COUNTY AND WASCO COUNTY.
• 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:

Saturday September 16th– Preliminary forecasts:

Ducks vs Wyoming, at War Memorial Stadium – Laramie, Wyoming– Kickoff: 4:00 PM PDT – Partly cloudy, a slight chance of showers, 60 degrees and cooling as the game progresses, wind SW 15 mph.

Beavers vs Washington State, at Martin Stadium – Pullman, Washington– Kickoff: 2:30 PM PDT- Mostly sunny, 62 degrees warming to 68 degrees, then slow cooling toward the end of the game, wind ESE 10 mph.

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

• Mostly sunny and much cooler this afternoon, partly cloudy tonight,
• Partly cloudy in the AM, mostly sunny and a bit cooler Thursday afternoon, mostly clear Thursday night,
• Mostly sunny and a bit warmer Friday, then partly cloudy at night.
• highs near 76 lows 48-46 warming to 50 Friday night.
• Partly cloudy and a bit warmer Saturday and Saturday night,
• A mix of clouds and sun Sunday, increasing clouds to mostly cloudy with rain becoming likely (70%) in the afternoon and Sunday night,
• Cloudy with rain likely (70%) Monday and in the evening, a good (50%) chance of rain late Monday night,
• Then cloudy with a good (50%) chance of rain and a bit warmer Tuesday.
• highs 76-63 warming to 65 Tuesday lows 49-52. (seasonal averages high 78 low 48)

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Forecast for Roseburg:

• Sunny and much cooler with patchy smoke this afternoon, mostly clear with patchy smoke this evening, partly cloudy with patchy smoke late tonight,
• AM clouds, sunny and a bit cooler with patchy smoke Thursday afternoon, mostly clear with patchy smoke at night,
• Sunny with patchy smoke and a bit warmer Friday, then mostly clear with patchy evening smoke, then partly cloudy with patchy smoke late Friday night.
• highs 79-72 warming back to 79 Friday lows near 48.
• Partly cloudy with patchy smoke Saturday and Saturday night,
• Partly cloudy with patchy AM smoke, mostly cloudy and a bit cooler with patchy smoke and rain likely (70%) Sunday afternoon and at night,
• Mostly cloudy with patchy smoke and rain likely (70%) Monday AM, showers likely (70%) with patchy smoke and a bit cooler in the afternoon and evening, showers likely (60%) with patchy smoke late Monday night,
• Then mostly cloudy with patchy smoke and a (40%) chance of showers Tuesday.
• highs 80-65 warming to 67 Tuesday lows 50-53 cooling back to 50 Monday night. (seasonal averages high 80 low 52)

 

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

• Sunny this afternoon, partly cloudy this evening, mostly cloudy late tonight and Thursday AM, partly cloudy and a bit cooler in the afternoon, mostly cloudy at the shore while mostly clear inland Thursday night,
• AM clouds, sunny and a bit warmer Friday afternoon, partly cloudy at night.
• highs 63-65 lows 52-48.
• Partly cloudy and a bit cooler Saturday and in the evening, becoming mostly cloudy late Saturday night,
• Mostly cloudy with rain likely (70%) and a bit warmer Sunday afternoon and Sunday night,
• Mostly cloudy with showers likely (60%) and a bit cooler Monday and at night
• Then mostly cloudy and a bit cooler with a good (50%) chance of showers Tuesday.
• highs 65-62 lows near 52. (seasonal averages high 65 low 51)

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Forecast for the Cascades in Lane County:

• Mostly sunny with areas of smoke and cooler this afternooon, partly cloudy with areas of evening smoke, mostly cloudy and colder with areas of smoke late tonight,
• A mix of clouds and sun with areas of smoke a slight (20%) chance of AM showers, mostly sunny with areas of smoke and a bit cooler Thursday afternoon, mostly clear with areas of smoke late at night,
• Mostly sunny with areas of smoke and a bit warmer Friday, partly cloudy with areas of smoke Friday night.
• free air freezing level 14,000 ft. this afternoon, 13,000 ft. late tonight, 10,000 ft. Thursday, then 10,000 ft. falling to 9,000 ft. late Thursday night, 9,000 ft. rising to 10,000 ft. Friday, then 10,000 ft. rising to 11,000 ft. late Friday night.
• highs 65-55 warming to 62 Friday lows 38-35 warming to 40 Friday night.
• AM sun with areas of smoke, partly cloudy and a bit warmer with areas of smoke Saturday afternoon and Saturday night,
• Areas of AM smoke, a mix of clouds and sun and a bit warmer with patchy smoke and a good (50%) chance of rain Sunday afternoon, mostly cloudy with patchy smoke and a (40%) chance of evening rain, patchy smoke with rain likely (70%) late Sunday night,
• Cloudy with AM rain likely (70%), a bit cooler with a good (50%) chance of rain with patchy smoke Monday afternoon, mostly cloudy with  good (50%) chance of rain at night,
• Then mostly cloudy with a (40%) chance of AM rain, then a (40%) chance of showers Tuesday afternoon.
• free air freezing level 11,000 ft. Saturday, 11,000 ft. falling to 10,000 ft. Saturday night and Sunday AM, snow level above 8,000 ft. Sunday afternoon, above 8,000 ft. falling to 7,500 ft. late Sunday night, 7,500 ft. falling to 6,500 ft. Monday, 6,000 ft. late Monday night, then rising to 6,500 ft. Tuesday.
• highs 63-48 lows 42-37.

 

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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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