Here is my new weekly weather quiz question. What is an “Algorithm?” Please remember to post your answer at the bottom of this page. An email will not suffice. The first person to post the correct answer 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 area with blue arrows) is sending more storms our way.  The graphic for days 3-7 shows the next series of fronts that we will see approaching Oregon Friday, Saturday, Sunday and again next Tuesday. It looks like there will be snow on the Cascade Passes for Thanksgiving through the weekend, BUT Willamette Pass and Hoodoo ski areas will not be open. I’d say they need two good snow storms to produce the approximately 30 inches of snow they need to open. Drive carefully! If you need to travel the passes remember this is the first real snow of the season and you will have to be prepared to chain-up if necessary.

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Air Quality Index:

Eugene-Springfield: The Air Quality Index is 9 in the Good category measuring Particulate Matter.

Oakridge: The Air Quality Index is 18 in the Good category measuring Particulate Matter.

Cottage Grove: The Air Quality Index is 10 in the Good category measuring Particulate Matter.

Data courtesy of Lane Regional Air Protection Agency (LRAPA).

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Home Wood Heating Advisory:

Eugene-Springfield: Green – Burning is allowed.

Oakridge: Yellow – Green – Burning is allowed.

*Note: Pellet stoves may be used anytime if they produce no visible emissions.

Data courtesy of Lane Regional Air Protection Agency (LRAPA)

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Advisories:

• A HIGH WIND WARNING IS IN EFFECT FROM 1 AM UNTIL 10 AM THURSDAY FOR THE NORTH OREGON COAST AND THE CENTRAL OREGON COAST.
• A HIGH WIND WATCH IS IN EFFECT FROM THIS THURSDAY AFTERNOON THROUGH THURSDAY EVENING FOR THE NORTH OREGON COAST AND THE CENTRAL OREGON COAST.
• A WINTER WEATHER ADVISORY IS IN EFFECT UNTIL 10 AM TODAY ABOVE 4,500 FT. FOR THE SOUTH CENTRAL OREGON CASCADES, THE SOUTHERN OREGON CASCADES, AND THE SISKIYOU MOUNTAINS.
• A HIGH WIND WARNING IS IN EFFECT FROM 1 AM THURSDAY THROUGH 1 AM FRIDAY FOR THE SOUTH CENTRAL OREGON COAST AND THE CURRY COUNTY COAST.
• A Permanent Health Advisory is still 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.
• A Blue-Green Algae Health Advisory remains in effect for Agency Lake. Agency Lake is located just north of Upper Klamath Lake near Klamath Falls along Highway 97 in Klamath County. Water monitoring on the lake has confirmed the presence of high levels of blue-green algae and associated toxins that can be harmful to people and animals. Swallowing water while swimming or inhaling water droplets as a result of high-speed water activities, such as water skiing and power boating, should be avoided in areas where blooms are identified. Although toxins are not absorbed through the skin, contact with cells from a bloom can cause skin irritation and a red, puffy rash in individuals with skin sensitivities, or those who develop rashes easily.

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

• Mostly cloudy and a bit cooler with showers this afternoon (0.25 in. of rain possible), cloudy with a slight (20%) chance of evening rain, rain likely (70%) tonight (0.50 in. of rain possible) and breezy (Wind: S 15-25 mph),
• Mostly cloudy with rain Thursday (Thanksgiving Day) and breezy (Wind: S 15-25 mph decreasing to S 10-15 mph in the afternoon), then rain in the evening and showers late Thursday night,
• Mostly cloudy with rain and a bit cooler Friday, evening showers likely (70%), then rain late Friday night.
• highs 52-49 lows near 44.
• Mostly cloudy with rain and a bit warmer Saturday, showers likely (70%) at night,
• Cloudy and a bit warmer with a (40%) chance of showers Sunday, rain likely (70%) Sunday night,
• Mostly cloudy with showers likely (70%) Monday, a good (50%) chance of showers Monday night,
• Then mostly cloudy with a slight (20%) chance of showers Tuesday.
• highs 47-52 lows 42-45. (seasonal averages high 50 low 37)
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Your College Football Forecast:

The Civil War Game:

Ducks vs Beavers at Reser Stadium, Corvallis – Kickoff: 1:00 PM PST – Mostly cloudy with rain 44 warming to 48 by the end of the game. That means a chilly and wet afternoon. Dress appropriately.

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Forecast for Roseburg:

• Mostly cloudy with showers and a bit cooler this afternoon (0.10 in. of rain possible, snow level 3,000 ft. rising to 3,500 ft. this afternoon), cloudy with a (30%) chance of rain late tonight (under 0.10 in. of rain possible, snow level 3,500 ft.),
• Cloudy and a bit cooler with a (30%) chance of rain snow (level 3,500 ft.) Thursday (Thanksgiving Day) and breezy (Wind: S 15-25 mph), evening rain, rain late Thursday night.
• highs 52-46 lows 42-44 cooling back to 42 Thursday night.
• Mostly cloudy with rain Friday (snow level 3,500 ft.), showers Friday night,
• Cloudy with rain and a bit warmer Saturday,  showers at night,
• Cloudy with rain and snow showers Sunday AM, a good (50%) chance of afternoon showers and a bit warmer, a (40%) chance of rain Sunday night,
• Rain likely (70%) Monday, showers a good (50%) chance of rain at night,
• Then mostly cloudy with a slight (20%) chance of showers Tuesday.
• highs 52-48 warming to 54 Monday cooling back to 52 Tuesday  lows 40-42 cooling back to 40 Monday night. (seasonal averages high 51 low 39)

 

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

• Mostly cloudy with showers a bit cooler this afternoon (0.25 in. of rain possible), a good (50%) chance of evening coastal rain and coastal rain likely (70%) while a (40%) chance of inland rain tonight (0.25 in. of rain possible) and windy (Wind: S 25-35 mph at the shore while S 10-20 mph inland, gusts to 40 mph)
• Mostly cloudy with coastal rain while inland AM rain and rain likely (70%) inland Thursday afternoon and windy (Wind: S 25-40 at the shore while S 15-25 mph inland- gusts 50-55 mph), rain (possibly heavy at times) and windy (Wind: S 30-45 mph decreasing to S 15-20 mph late at night at the shore while S 20-25 mph inland decreasing to S 10-15 mph late at night) Thursday night,
• Mostly cloudy and a bit cooler with rain Friday, then showers Friday night.
• highs 55-49 lows 48-45.
• Mostly cloudy with rain Saturday, showers at night,
• Cloudy with a good (50%) chance of showers and a bit warmer Sunday, rain Sunday night and Monday, a good (50%) chance of showers Monday night,
• Then mostly cloudy with a slight (20%) chance of showers Tuesday.
• highs 54-56 cooling back to 54 Tuesday lows 44-46. (seasonal averages high 53 low 42)

 

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Forecast for the Cascades in Lane County:

• Mostly cloudy and bit cooler with rain and snow showers this afternoon (0.25 in. of rain possible, 1-4 in. of snow possible), cloudy with a slight (20%) chance of rain and snow tonight (0.10 in. of rain possible),
• Then mostly cloudy with a good (50%) chance of snow and rain and a bit cooler Thursday (Thanksgiving Day), rain and snow Thursday night and Friday, evening rain and snow showers likely (70%), then rain and snow late Friday night.
• snow level 3,000 ft. today,  4,000 ft. falling to 2,500 ft. late Thursday, 4,500 ft. Thursday night and Friday, then 3,500 ft. Friday night.
• highs 35-37 lows 30-33 cooling to 29 Friday night.
• Mostly cloudy with snow and rain and a bit cooler Saturday, rain and snow showers at night,
• Mostly cloudy and a bit warmer Sunday with a good (50%) chance of snow showers, snow and rain Sunday night,
• Rain and snow showers and a bit warmer Monday, rain and snow showers likely (70%) Monday night,
• Then mostly cloudy with a slight (20%) chance of rain and snow showers Tuesday.
• snow level 4,500 ft. Saturday, 2,500 ft. Saturday night through Sunday night, 3,000 ft. Monday 3,500 ft. Monday night, then 3,000 ft. Tuesday.
• highs 32-38 lows 22-30 cooling to 28 Wednesday night.

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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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