Nov
17.
Check out my latest Eugene Daily News Weather Or Not column Like The TV Show “Bones,” But For Real.
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Here is my weekly weather quiz question. What is “Clear Air Turbulence (CAT)?” 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) will give way to a short-lived high pressure ridge (“Arch” shape in blue arrows) through early Sunday for a little clearing, then another trough will follow closely behind by late Sunday. The graphics for days 1-3 show the frontal system moving through Oregon. The graphics for days 3-7 show the parade of complex frontal systems that are headed our way Tuesday through next Saturday.
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Air Quality Index:
Eugene/Springfield: The Air Quality Index is 11 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 6 in the Good category measuring Particulate Matter.
Data courtesy of Lane Regional Air Protection Agency (LRAPA)
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ADVISORIES:
- A FROST ADVISORY EFFECT FROM 2 AM UNTIL 8 AM SATURDAY FOR THE SOUTH CENTRAL OREGON COAST, THE CURRY COUNTY COAST, AND CENTRAL DOUGLAS COUNTY.
- A FREEZE WARNING IS IN EFFECT FROM 2 AM UNTIL 8 AM SATURDAY FOR CENTRAL DOUGLAS COUNTY.
- A Health Advisory remains in effect for the Link and Klamath from Keno Dam to J.C. Boyle Dam (downstream from Keno Dam). Water monitoring has confirmed the presence of blue-green algae and the toxins they produce. 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 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 HAS BEEN LIFTED for Agency Lake, located just north of Klamath Falls along U.S. Highway 97 in Klamath County. Water monitoring has confirmed the toxin levels have dissipated and are safe for humans. The authorities warn that the water still is not safe for animals, such as dogs, and they should not be allowed to have contact with the water.
- 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:
November 18th:
Ducks vs Arizona, at Autzen Stadium – Kickoff: 4 PM – Partly cloudy, 50, cooling quickly as the game progresses due to the setting sun.
November 18th:
Beavers vs Arizona State, at Reser Stadium – Kickoff: 12:00 PM – Partly cloudy, 45, warming to 50 toward the end of the game, then cooling.
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Forecast for the Southern and lower Mid Willamette Valley including Eugene-Springfield and Albany-Corvallis:
- Partly cloudy this evening, mostly cloudy with patchy fog late tonight,
- Areas of AM fog, partly cloudy Saturday, partly cloudy with areas of fog late at night,
- Mostly cloudy with areas of AM fog and a slight (20%) chance of rain, a bit warmer with a (40%) chance of rain Sunday afternoon, rain possibly heavy at times Sunday night,
- Mostly cloudy and a bit cooler with rain Monday, then a (40%) chance of rain at night.
- lows 33-44 highs 50-54 cooling to 52 Monday night.
- Mostly cloudy with a good (50%) chance of rain and a bit warmer Tuesday, rain likely (70%) and a bit warmer at night and Wednesday, a good (50%) chance of rain and a bit cooler Wednesday night and Thursday (Thanksgiving Day), mostly cloudy with a (40%) chance of rain Thursday night,
- Then a mix of clouds and sun and a bit cooler with a good (50%) chance of rain Friday.
- highs 52-59 cooling to 54 Friday lows 50-44. (seasonal averages high 51 low 37)
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Forecast for Roseburg:
- Mostly cloudy this evening, becoming partly cloudy with patchy fog late tonight,
- Mostly cloudy with areas of fog and frost Saturday AM, partly cloudy and a bit cooler in the afternoon, partly cloudy with patchy fog late Saturday night,
- Mostly cloudy and a bit warmer with a slight (20%) chance of rain Sunday afternoon, cloudy with a good (50%) chance of evening rain, rain likely (70%) late at night,
- Cloudy with rain Monday AM, a good (50%) chance of afternoon rain, then mostly cloudy with a (30%) chance of rain Monday night.
- lows 35-46 highs 53-57.
- Mostly cloudy and a bit warmer with rain likely (70%) Tuesday and Tuesday night,
- A (40%) chance of rain and a bit warmer Wednesday and at night,
- Mostly cloudy and a bit cooler with a rain likely (60%) Thursday (Thanksgiving Day), then mostly cloudy and a bit cooler with a (40%) chance of rain Thursday night and Friday.
- highs 58-60 cooling to 54 Friday lows 52-45. (seasonal averages high 52 low 40)
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Forecast for The South Oregon Coast Including Coos Bay and North Bend:
- Partly cloudy with patchy coastal fog late tonight,
- Partly cloudy and a bit warmer Saturday with areas of AM coastal fog and frost while areas of inland AM frost, a bit warmer in the afternoon, partly cloudy with patchy fog late Saturday night,
- Mostly cloudy with a slight (20%) chance of rain and a bit warmer Sunday afternoon, evening rain likely (70%), rain late at night and windy (Wind: S 20-30 mph at the shore while S 15-25 mph inland),
- Mostly cloudy with AM rain Monday, then a good (50%) chance of rain Monday night.
- lows 38-49 highs 55-57.
- Mostly cloudy and a bit warmer with rain Tuesday and Tuesday night,
- Cloudy with rain likely (70%) Wednesday, mostly cloudy with a (40%) chance of rain at night,
- Rain likely (70%) and a bit cooler Thursday (Thanksgiving Day), then mostly cloudy with a (40%) chance of rain and a bit cooler Thursday night and Friday.
- highs 62-55 lows 53-48. (seasonal averages high 54 Low 42)
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Forecast for the Cascades in Lane County:
- Partly cloudy tonight and Saturday AM, partly cloudy in the afternoon and Saturday night,
- A mix of clouds and sun and a bit warmer with a slight (20%) chance of rain Sunday afternoon, evening rain and snow likely (70%), rain late at night and Monday, then mostly cloudy with a good (50%) chance of rain and Monday night.
- free air freezing level 4,500 ft. falling to 4,000 ft. late tonight, 4,500 ft. rising to 6,500 ft. Saturday, 7,500 ft. falling to 6,000 ft. Saturday night, snow level 5,500 ft. Sunday, then 6,000 ft. rising to 7,500 ft. Sunday night, 5,500 ft. Monday, then above 8,000 ft. Monday night.
- lows 20-34 highs near 40.
- Mostly cloudy with a good (50%) chance of rain and a bit warmer Tuesday, rain likely (70%) and a bit warmer at night through Wednesday night,
- Mostly cloudy with a good (50%) chance of rain and a bit cooler Thursday (Thanksgiving Day), a (40%) chance of rain Thursday night,
- Then a mix of clouds and sun with a good (50%) chance of rain Friday.
- snow level above 8,000 ft. Tuesday through Wednesday, 8,000 ft. Wednesday night and Thursday, then 6,500 ft. Thursday night and Friday.
- highs 44-46 cooling to 42 Thursday and Friday lows 38-32.
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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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