Here is my weekly weather quiz question. What is a “Cap Cloud?” 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.

________________

 

An Upper Level Low Pressure Trough (Shaded “U” shape with blue arrows) is moving in for a change of weather.  An Upper Level High Pressure Ridge (Shaded “Arch” shape with blue arrows) will replace the Low Pressure Trough to bring back the sunshine and warming temperatures next week. The graphics for days 1-3 show the weak frontal system moving in for Saturday. The graphics for days 3-7 show a complex frontal system moving into the Pacific Northwest Tuesday.

________________

Air Quality Index:

Eugene-Springfield: The Air Quality Index is 23 in the Good category measuring Particulate Matter.

Oakridge: The Air Quality Index is 17 in the Good category measuring Particulate Matter.

Cottage Grove: The Air Quality Index is 7 in the Good category measuring Particulate Matter.

Data courtesy of Lane Regional Air Protection Agency (LRAPA)

 

 

__________________

Advisories:

• A Health Advisory remains in effect for the Link and Klamath rivers to Keno Dam. 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.
• 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 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 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.

 

________________

Your College Football Forecast:

Saturday:

Ducks vs Washington State, at Autzen Stadium – Kickoff: 5:00 PM PDT – Partly cloudy 65, a good (50%) chance of showers, cooling as the game progresses, Wind: SW 5-10 mph.

Beavers vs USC, at Los Angeles Coliseum – Kickoff: 1:00 PM PDT – Sunny 85, cooling to near 75 by the end of the game, wind: WSW 5-7 mph.

 

________________

 

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

• Partly cloudy this evening rain, becoming mostly cloudy with a slight (20%) chance of rain late tonight,
• A good (50%) chance of AM rain, a mix of clouds and sun and much cooler with a good (50%) of chance of showers Saturday afternoon (under 0.10 in. of rain possible), partly cloudy with a good (50%) chance of showers Saturday night (under 0.10 in. of rain possible),
• Mostly cloudy Sunday with a good (50%) chance of AM showers, a bit cooler with a slight (20%) chance of showers in the afternoon (under 0.10 in. of rain possible), becoming partly cloudy with patchy fog late Sunday night and Monday AM, mostly sunny and a bit warmer Monday afternoon (Columbus Day), then just partly cloudy Monday  night.
• lows 45-39 highs 65-69.
• A mix of clouds and sun and a bit cooler Tuesday, partly cloudy with a slight (20%) chance of showers Tuesday night  through Wednesday night,
• A mix of clouds and sun with a (40%) chance of showers Thursday, mostly cloudy with a (40%) chance of showers Thursday night,
• Then a mix of clouds and sun and a bit cooler with a (40%) chance of showers Friday.
• highs 64-57 lows 40-42. (seasonal averages high 69 low 43)

 

________________

 

Forecast for Roseburg:

• Mostly clear tonight,
• Partly cloudy and much cooler with a (30%) chance of showers Saturday (under 0.10 in. of rain possible), partly cloudy in the evening, mostly cloudy with a slight (20%) chance of showers late at night (under 0.10 in. of rain possible) and Sunday AM, partly cloudy and a bit cooler in the afternoon, clear Sunday night,
• Mostly sunny and a bit warmer Monday (Columbus Day), then mostly clear at night.
• lows 47-39 warming to 43 Monday night highs 64-73.
• Partly cloudy and a bit cooler Tuesday and Wednesday, partly cloudy Tuesday night, partly cloudy with a slight (20%) chance of showers Wednesday night,
• Then mostly sunny and a bit cooler with a (30%) chance of showers Thursday through Friday.
• highs 67-59 lows 39-44. (seasonal averages high 71 low 47)

 

_____________________

 

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

• Mostly clear this evening, mostly cloudy late tonight with a slight (20%) chance of coastal showers,
• Partly cloudy with a (30%) chance of showers and a bit cooler Saturday (under 0.10 in. of rain possible), partly cloudy in the evening, mostly cloudy with a slight (20%) chance of shower late Saturday night (under 0.10 in. of rain possible),
• Mostly cloudy with a slight (20%) chance of AM showers (under 0.10 in. of rain possible), partly cloudy and a bit cooler Sunday afternoon, mostly clear at night,
• Mostly sunny and a bit warmer Monday (Columbus Day), then mostly clear Monday night.
• lows 50-46 highs 62-66.
• Partly cloudy and a bit cooler with a slight (20%) chance of showers Tuesday, becoming mostly clear at night,
• Partly cloudy and a bit cooler Wednesday, partly cloudy with a slight (20%) chance of showers Wednesday night,
• Then mostly cloudy and a bit cooler with a (40%) chance of showers Thursday through Friday.
• highs 62-59 lows near 46. (seasonal averages high 63 low 47)

________________

Forecast for the Cascades in Lane County:

• Partly cloudy with a slight (20%) chance of rain late tonight,
• A mix of clouds and sun with a good (50%) chance of AM rain, a mix of clouds and sun and a bit cooler with a good (50%) chance of showers Saturday afternoon, partly cloudy with a good (50%) chance of evening showers, mostly cloudy with a good (50%) chance of showers late at night,
• Mostly cloudy with AM rain and snow showers likely (70%) Sunday, a bit cooler with a good (50%) chance of rain and snow showers in the afternoon, becoming partly cloudy Sunday night,
• Mostly sunny and a bit warmer Monday (Columbus Day), then mostly clear at night.
• snow level above 8,000 ft. tonight and Saturday, 8,000 ft. falling to 6,000 ft. late Saturday night, 5,500 ft. Sunday, free air freezing level 7,500 ft. rising to 10,000 ft. Sunday night, 12,000 ft. rising to 13,000 ft. Monday afternoon, then 14,000 ft. Monday night.
• lows 36-30 warming to 33 Monday night highs 50-46 warming to 55 Monday.
• Partly cloudy and a bit cooler Tuesday, partly cloudy at night through Wednesday night,
• Partly cloudy with a (30%) chance of showers and a bit cooler Thursday, partly cloudy with a (30%) chance of showers Thursday night,
• Then a mix of clouds and sun but much cooler with a (40%) chance of rain and snow showers Friday.
• free air freezing level 12,000 ft. falling to 10,000 ft. Tuesday afternoon, 13,000 ft. snow level 6,000 ft.  Tuesday night , 5,000 ft. Wednesday, 6,500 ft. Wednesday night, 6,000 ft. Thursday, 5,500 ft. Thursday night, then 5,000 ft. Friday.
• highs 53-37 lows 32-30.

 

________________

**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.

________________

Get your local Eugene-Springfield and Lane County news on-line at eugenedailynews.com.

________________