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 Low Pressure Trough (Shaded “U”shape with blue arrows) has helped to change our weather pattern.  Onshore airflow will keep us cooler with the benefit of cleaner air for a little longer, but we do warm up more today. The graphics for days 3-7 show a frontal system moving through Oregon Friday through Monday.

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Air Quality Index:

Eugene-Springfield: The Air Quality Index is 82 in the Good category measuring Ozone.

Oakridge: The Air Quality Index is 50 in the Good category measuring Particulate Matter.

Cottage Grove: The Air Quality Index is 26 in the Moderate category measuring Ozone.

Data courtesy of Lane Regional Air Protection Agency (LRAPA)

 

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Advisories:

• A FIRE WEATHER WATCH IS IN EFFECT THROUGH 10 AM WEDNESDAY FOR THE WESTERN SISKIYOU  NATIONAL FOREST IN THE SOUTHWEST OREGON COAST RANGE MAINLY ABOVE 2,000 FT.
• 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:

• Mostly sunny and a bit warmer today and Wednesday, mostly clear both nights,
• AM clouds, mostly sunny Thursday, then mostly clear at night,
• highs 82-86 cooling to 84 Thursday lows 47-54 cooling to 52 Thursday night.
• Mostly sunny and a bit warmer Friday, mostly clear in the evening, partly cloudy late Friday night and Saturday AM, mostly sunny and a bit cooler in the afternoon, partly cloudy Saturday night,
• AM clouds, mostly sunny and a bit cooler Sunday, then partly cloudy Sunday night through Tuesday.
• highs 86-82 lows near 52. (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:

• Mostly sunny and a bit warmer with areas of smoke this afternoon, mostly clear tonight,
• Sunny with patchy smoke Wednesday, clear with more patchy smoke at night,
• AM clouds and patchy smoke, sunny with patchy smoke Thursday afternoon, then mostly clear with patchy fog Thursday night.
• highs 85-90 lows 55-59 cooling to 57.
• Mostly sunny and a bit warmer with patchy smoke Friday and Saturday, mostly clear with patchy smoke both nights,
• Partly cloudy and a bit cooler Sunday, partly cloudy at night,
• Then partly cloudy and a bit warmer Monday.
• highs 90-86 warming to warming to 89 Monday lows 58-56. (seasonal averages high 85 low 56)

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

• Sunny and a bit cooler this afternoon, mostly clear this evening, partly cloudy with patchy coastal fog late tonight,
• Patchy AM coastal fog, mostly sunny and a bit warmer Wednesday with patchy lingering fog, partly cloudy with patchy fog late Wednesday night,
• AM clouds and fog, mostly sunny Thursday afternoon,  then mostly clear with patchy fog at night.
• highs near 66 lows near 55.
• Patchy AM fog, mostly sunny Friday afternoon, mostly clear in the evening,  then partly cloudy late Friday night through Monday.
• highs near 65 lows near 55. (seasonal averages high 65 low 53)

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Forecast for the Cascades in Lane County:

• A mix of clouds and sun and a bit warmer with patchy smoke today, mostly clear tonight,
• Mostly sunny and a bit warmer Wednesday, mostly clear at night,
• Sunny Thursday, then clear Thursday night.
• free air freezing level 12,000 ft. today, then above 12,000 ft. tonight through Thursday night,
• highs 69-75 lows 45-48.
• Sunny and a bit warmer Friday, clear Friday night,
• Mostly sunny and a bit cooler Saturday, mostly clear at night,
• Mostly sunny Sunday and a bit cooler in the afternoon,mostly clear Sunday night,
• AM sun, then partly cloudy Monday afternoon.
• free air freezing level above 12,000 ft. Friday through Monday.
• highs 76-72 lows 48-46.

 

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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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