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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An Upper Level Low Pressure Trough (Shaded “U” shape with blue arrows) returns marine airflow to the Willamette Valley for a while cooling us down. We warm a bit more today, but the smoke has returned to the southern Willamette Valley. The graphics for days 3-7 show a frontal system that will push through the Pacific Northwest Sunday into Monday.

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Air Quality Index:

Eugene-Springfield: The Air Quality Index is 184 in the Unhealthy category measuring Particulate Matter.

Oakridge: The Air Quality Index is 52 in the Moderate category measuring Particulate Matter.

Cottage Grove: The Air Quality Index is 41 in the Good category measuring Particulate Matter.

Data courtesy of Lane Regional Air Protection Agency (LRAPA)

 

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Advisories:

• A  FREEZE WARNING IS IN EFFECT FROM 2 AM UNTIL 8 AM SATURDAY FOR THE KLAMATH BASIN, NORTHERN AND EASTERN KLAMATH COUNTY, AND WESTERN CENTRAL AND EASTERN LAKE COUNTY.
• A  FROST ADVISORY IS IN EFFECT FROM 2 AM UNTIL 8 AM SATURDAY FOR THE KLAMATH BASIN, NORTHERN AND EASTERN KLAMATH COUNTY, AND WESTERN CENTRAL AND EASTERN LAKE COUNTY.
• AN AIR QUALITY ALERT IS IN EFFECT UNTIL 10 AM TODAY FOR WASCO COUNTY AND BENTON 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:

Ducks vs Wyoming, at War Memorial Stadium – Laramie, Wyoming– Kickoff: 4:00 PM PDT – Partly cloudy, 62 degrees and cooling as the game progresses, breezy – wind WSW 20 mph.

Beavers vs Washington State, at Martin Stadium – Pullman, Washington– Kickoff: 2:30 PM PDT- Mostly sunny, 62 degrees warming to 66 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:

• Sunny and a bit warmer with patchy smoke this afternoon, clear this evening, partly cloudy with patchy smoke late tonight,
• Partly cloudy and a bit cooler with patchy smoke Saturday, mostly cloudy Saturday night,
• Mostly cloudy with rain likely (70%) and a bit cooler Sunday afternoon, then rain at night.
• highs 80-72 lows 48-52.
• Cloudy with showers and a bit cooler Monday and Monday night,
• Mostly cloudy with AM showers likely (60%), a good (50%) chance of showers and a bit warmer Tuesday afternoon, mostly cloudy with a good (50%) chance of showers at night,
• A mix of clouds and sun with a (40%) chance of showers Wednesday, a (30%) chance of showers Wednesday night,
• Then a mix of clouds and sun and a bit warmer with a (30%) chance of showers Thursday.
• highs 62-69 lows near 50. (seasonal averages high 78 low 47)

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Forecast for Roseburg:

• Sunny and a bit warmer with patchy smoke this afternoon, mostly clear with patchy smoke late tonight,
• Partly cloudy with patchy AM smoke, mostly cloudy and a bit cooler Saturday afternoon, partly cloudy late Saturday night,
• Mostly cloudy and a bit cooler with a (40%) chance of rain Sunday afternoon, evening rain likely (70%), then rain late at night.
• highs 80-82 cooling to 72Sunday night lows 50-52.
• Mostly cloudy with showers and a bit cooler Monday and Monday night,
• Cloudy with showers Tuesday AM, a good (50%) chance of showers in the afternoon and at night,
• Mostly cloudy with a (40%) chance of showers Wednesday and Wednesday night,
• Then mostly cloudy and a bit warmer with a (30%) chance of showers Thursday.
• highs 63-68 cooling to 66 Wednesday warming to 70 Thursday lows 48-50 cooling back to 48 Wednesday night. (seasonal averages high 79 low 52)

 

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

• Sunny and a bit warmer this afternoon, clear this evening, becoming mostly cloudy late tonight,
• Mostly cloudy and a bit cooler Saturday, mostly clear in the evening, mostly cloudy late Saturday night,
• Mostly cloudy with a (40%) chance of rain and a bit warmer Sunday afternoon, rain Sunday night.
• highs 65-60 warming back to 65 Sunday lows 52-50.
• Mostly cloudy with showers and cooler Monday and at night,
• Cloudy with AM showers, a bit cooler with a good (50%) chance of showers Tuesday afternoon, mostly cloudy with evening showers likely (70%), a (30%) chance of showers Tuesday night,
• Then mostly cloudy with a (30%) chance of showers and a bit warmer Wednesday through Thursday.
• highs 62-65 lows 48-50 cooling back to 48 Wednesday night. (seasonal averages high 65 low 50)

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Forecast for the Cascades in Lane County:

• Sunny with areas of smoke and a bit warmer today, mostly clear with areas of smoke tonight,
• AM sun, a mix of clouds and sun and a bit warmer with areas of smoke Saturday afternoon, mostly cloudy with areas of evening smoke, partly cloudy with areas of smoke late Saturday night,
• A mix of clouds and sun and a bit cooler with a good (50%) chance of rain Sunday afternoon, evening rain, then rain and snow late Sunday night.
• free air freezing level 9,000 ft. this afternoon, 10,000 ft. rising to 11,000 ft. late tonight, 10,000 ft. Saturday and Saturday night, snow level above 8,000 ft. Sunday, then above 8,000 ft. falling to 6,500 ft. late Sunday night.
• highs 62-65 cooling to 60 Sunday lows 40-42 cooling back to 40 Sunday night.
• Showers Monday AM, cooler with rain and snow showers in the afternoon through Tuesday AM, showers likely (70%) in the afternoon and evening, a (40%) chance of showers late Tuesday night,
• Then mostly cloudy with a (40%) chance of showers and a bit warmer Wednesday, a (30%) chance of showers at night,
• Then mostly cloudy with a (30%) chance of showers Thursday.
• snow level 6,000 ft. falling to 5,500 ft. Monday, 5,500 ft. Monday night, 6,000 ft. Tuesday afternoon through Wednesday night, then 6,500 ft. Thursday.
• highs 46-52 lows 36-38.

 

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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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