Here is my weekly weather quiz question. What is the “Beaufort Scale?” 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) will linger offshore as low pressure is well east of us. Those two elements will keep our weather stable for a while, then the ridge will start to heat us up again next week. The graphics for days 1-3 show a frontal system approaching the coast from the northwest on Friday through Saturday. The graphics for days 3-7 show a frontal system moving through between Wednesday and  Thursday next week.

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Air Quality Index:

Eugene-Springfield: The Air Quality Index is 20 in the Good category measuring Particulate Matter.

Oakridge: The Air Quality Index is 19 in the Good category measuring Particulate Matter.

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

Data courtesy of Lane Regional Air Protection Agency (LRAPA)

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Advisories:

• AN AIR QUALITY ALERT IS IN EFFECT UNTIL FURTHER NOTICE FOR CENTRAL DOUGLAS COUNTY, EASTERN CURRY COUNTY, JOSEPHINE COUNTY, THE EASTERN DOUGLAS COUNTY FOOTHILLS, JACKSON COUNTY, THE SOUTH CENTRAL OREGON CASCADES, THE SOUTHERN OREGON CASCADES, AND THE SISKIYOU MOUNTAINS.
• 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, to include Shoalwater Bay to the north. 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.
• The Oregon Health Authority issued Health Advisory 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.
• The Oregon Health Authority issued a Health Advisory today 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 issued a Health Advisory 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.
• The Oregon Health Authority has updated the Health Advisory issued June 30 for Lake Billy Chinook, located about 12 miles west of Madras in Jefferson County. The update lifts the advisory on those areas of the Deschutes and Crooked River of Lake Billy Chinook arms affected by the advisory, and confines the advisory on the Metolius Arm to Perry South Cove. Water monitoring has confirmed that the level of blue-green algae toxins are below guideline values for human exposure. However, OHA recommends that people remain cautious when using the lake, particularly with pets because toxins are still well above the very low exposure levels established for dogs.
• 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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Forecast for the Southern and lower Mid Willamette Valley including Eugene-Springfield and Albany-Corvallis:

• Sunny today, mostly clear tonight,
• AM clouds Saturday, mostly sunny and a bit cooler in the afternoon, mostly clear at night,
• AM clouds and sun early, mostly sunny and a bit warmer Sunday afternoon, then mostly clear Sunday night.
• highs 84-82 lows 55-50 warming to 53 Sunday night .
• Sunny and a bit warmer Monday, mostly clear Monday night,
• AM sun Tuesday, partly cloudy in the afternoon and at night,
• Partly cloudy and a bit cooler Wednesday and in the evening, mostly cloudy late Wednesday night,
• Then a mix of clouds and sun and a bit cooler Thursday.
• highs 87-82 lows near 56. (seasonal averages high 83 low 51)

 

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Eugene-Springfield Pollen Count

Grass………. Low (2)
Trees………. Low (6)
Last Counted: 8/12/17
Data Courtesy of Oregon Allergy Associates.
Note: It would seem the pollen season is over.

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Forecast for Roseburg:

• Sunny with patchy smoke today, clear with patchy smoke tonight,
• Mostly sunny with patchy smoke and a bit cooler Saturday, mostly clear with patchy smoke Saturday night,
• Sunny with patchy smoke Sunday, then mostly clear with patchy smoke at night.
• highs 90-88 lows 58-54 warming to 56 Sunday night.
• Mostly sunny and a bit warmer with patchy smoke Monday, mostly clear with patchy smoke Monday night,
• AM sun, partly cloudy and a bit warmer Tuesday afternoon, partly cloudy with a slight (20%) chance of evening thunderstorms, just partly cloudy and and a bit cooler late Tuesday night through Wednesday night,
• Mostly cloudy Thursday AM, then partly cloudy and a bit cooler Thursday afternoon.
• highs 93-84 lows near 60. (seasonal averages high 85 low 55)

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

• Sunny and a bit warmer today, clear this evening and mostly cloudy with patchy coastal fog late tonight while clear at night inland,
• Mostly cloudy with patchy AM coastal fog, sunny and a bit cooler Saturday afternoon, mostly clear in the evening, mostly cloudy late Saturday night and Sunday AM, sunny and a bit warmer in the afternoon, clear in the evening, then partly cloudy late Sunday night.
• highs 69-65 warming to 67 Sunday lows near 55.
• Partly cloudy Monday and at night,
• Partly cloudy and a bit cooler Tuesday through Wednesday night,
• AM clouds, then partly cloudy and a bit cooler Thursday afternoon.
• highs 67-64 lows near 55. (seasonal averages high 66 low 53)

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Forecast for the Cascades in Lane County:

• Sunny and a bit warmer with more patchy smoke today, clear with patchy smoke tonight,
• Sunny and a bit cooler with patchy smoke Saturday, mostly clear with patchy smoke Saturday night,
• AM clouds, mostly sunny and a bit warmer Sunday, mostly clear Sunday night with patchy smoke throughout.
• free air freezing level above 12,000 ft. today through Sunday night,
• highs 75-72 warming to 74 Sunday lows 46-49.
• Sunny and a bit warmer with patchy smoke Monday, mostly clear at night with patchy evening smoke,
• AM sun, a mix of clouds and sun with a slight (20%) chance of showers and thunderstorms and a bit cooler Tuesday afternoon, partly cloudy with a slight (20%) chance of evening showers and thunderstorms, a slight (20%) chance of showers late Tuesday night,
• A mix of clouds and sun with a slight (20%) chance of AM showers, clouds and sun and a bit cooler Wednesday afternoon with a slight (20%) chance of showers and thunderstorms, partly cloudy with a slight (20%) chance of evening showers and thunderstorms, then just partly cloudy and a bit cooler Wednesday night and Thursday.
• free air freezing level above 12,000 ft. Monday through Tuesday AM, snow level above 8,000 ft. Tuesday afternoon through Wednesday evening, free air freezing level above 12,000 ft. late Wednesday night, then above 12,000 ft. falling to 12,000 ft. Thursday afternoon.
• highs 79-70 lows 53-49.

 

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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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