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 3 in the Good category measuring Particulate Matter.

Oakridge: The Air Quality Index is 13 in the Good category measuring Particulate Matter.

Cottage Grove: The Air Quality Index is 5 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 WINTER WEATHER ADVISORY IS IN EFFECT UNTIL 4 AM FRIDAY FOR THE NORTHERN OREGON CASCADES (NOT INCLUDING THE CASCADES IN LANE COUNTY).
• A WINTER WEATHER ADVISORY IS IN EFFECT FROM 10 PM TONIGHT UNTIL 10 PM FRIDAY FOR THE SOUTH CENTRAL OREGON CASCADES.
• A WINTER WEATHER ADVISORY IS IN EFFECT FROM 10 PM TONIGHT UNTIL NOON FRIDAY FOR THE KLAMATH BASIN, NORTHERN AND EASTERN KLAMATH COUNTY, AND WESTERN LAKE COUNTY.
• A WINTER WEATHER ADVISORY IS IN EFFECT FROM 10 PM TONIGHT  UNTIL 10 PM FRIDAY ABOVE 4,500 FT. FOR THE SOUTHERN OREGON CASCADES AND THE SISKIYOU MOUNTAINS.
• A HIGH WIND WARNING IS IN EFFECT UNTIL 1 AM FRIDAY FOR THE SOUTH CENTRAL OREGON COAST AND THE CURRY COUNTY COAST.
• A WIND ADVISORY IS IN EFFECT FROM 1 PM TODAY UNTIL 10 AM SATURDAY FOR NORTHERN AND EASTERN KLAMATH COUNTY, AND CENTRAL, EASTERN AND WESTERN LAKE COUNTY.
• A HIGH SURF ADVISORY IS IN EFFECT UNTIL 9 AM FRIDAY FOR THE SOUTH CENTRAL OREGON COAST AND THE CURRY COUNTY COAST.
• A FLOOD WATCH IS IN EFFECT THROUGH SATURDAY MORNING FOR THE SOUTH CENTRAL OREGON COAST, THE CURRY COUNTY COAST, CENTRAL DOUGLAS COUNTY, EASTERN CURRY COUNTY, AND JOSEPHINE COUNTY,
• A Permanent Health Advisory remains 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:

• Cloudy with rain, possibly heavy at times, tonight (1.00 in. of rain possible),
• Rain and a bit cooler Friday (0.25 in. of rain possible), rain likely (70%) at night (0.50 in. of rain possible),
• Cloudy with showers likely (70%) and a bit cooler Saturday (0.25 in. of rain possible), mostly cloudy with showers likely (70%) Saturday night (0.25 in. of rain possible),
• Mostly cloudy with a (30%) chance of AM showers,  a slight (20%) chance of showers Sunday afternoon, then showers likely (70%) Sunday night.
• lows 45-38 warming to 44 Sunday night highs 52-48.
• Mostly cloudy with showers likely (70%) and a bit warmer Monday, a (40%) chance of showers Monday night,
• Just mostly cloudy a bit cooler Tuesday, cloudy with a  (40%) chance of rain at night,
• Mostly cloudy with a good (50%) chance of showers Wednesday, cloudy with a (40%) chance of showers at night,
• Then mostly cloudy with a (40%) chance of showers Thursday.
• highs 52-47 lows near 40. (seasonal averages high 49 low 36)
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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 showers likely 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:

• Cloudy a good (50%) chance of evening rain, rain late tonight (0.25 in. of rain possible) and breezy (Wind: S 15-25 mph decreasing to S 10-15 mph late tonight),
• Mostly cloudy with rain and a bit cooler Friday (0.25 in. of rain possible) and in the evening, rain likely (70%) at night,
• Showers and a bit cooler Saturday (0.25 in. of rain possible), rain and snow showers likely (70%) Saturday night (0.10 in. of rain possible, snow level 3,000 ft. falling to 2,000 ft. late at night),
• Cloudy with a (40%) chance of AM rain and snow showers, a good (50%) chance of showers Sunday afternoon, rain likely (70%) late Sunday night.
• lows 44-40 highs 52-49.
• Cloudy with showers likely (70%) and a bit warmer Monday, mostly cloudy with a slight (20%) chance of showers at night,
• Mostly cloudy and a bit cooler with patchy fog Tuesday, a good (50%) chance of rain Tuesday night,
• Cloudy with a good (50%) chance of showers and a bit cooler Wednesday, a (30%) chance of rain and snow showers Wednesday night,
• Then cloudy and a bit cooler with a (30%) chance of rain and snow showers Thursday.
• highs 52-45 lows near 40. (seasonal averages high 50 low 39)

 

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

• Mostly cloudy with coastal rain and a slight (20%) chance of thunderstorms this evening with rain late tonight while inland rain tonight, possibly heavy late (1.50 in. of rain possible) and very windy (Wind: S 30-40 mph decreasing to S 10-15 mph late at the shore),
• Mostly cloudy and a bit cooler with rain Friday (0.50 in. of rain possible) and Friday night (0.75 in. of rain possible),
• AM coastal showers likely (70%) and coastal showers with a slight (20%) chance of thunderstorms and a bit cooler Saturday afternoon (0.25 in. of rain possible) and evening while inland showers Saturday  afternoon and evening with inland showers likely (70%) late at night (0.25 in. of rain possible),
• Mostly cloudy with a good (50%) chance of showers and a bit warmer Sunday, evening showers likely (70%), then rain likely (70%) late Sunday night.
• lows 47-42 warming to 44 Sunday night highs 54-52 warming back to 54 Sunday.
• Mostly cloudy with showers and a bit warmer Monday, a slight (20%) chance of showers at night,
• Just cloudy and a bit cooler with patchy fog Tuesday, mostly cloudy with a (40%) chance of rain Tuesday night,
• Mostly cloudy with a good (50%) chance of showers and a bit cooler Wednesday and at night,
• Then mostly cloudy with a (30%) chance of showers Thursday.
• highs 54-56 cooling back to 54 Wednesday lows 45-43 warming to 47 Tuesday night. (seasonal averages high 53 low 41)

 

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Forecast for the Cascades in Lane County:

• Cloudy with a good (50%) chance of rain and snow this evening, rain and snow late tonight (0.50 in. of rain possible, 5 in. of snow possible),
• Mostly cloudy with rain and snow and a bit warmer Friday (0.25 in. of rain possible, 1-4 in. of snow possible), evening rain and snow likely (70%), a good (50%) chance of rain and snow late Friday night (0.25 in. of rain possible, 2 in. of snow possible),
• Rain and snow showers and a bit cooler Saturday, rain and snow showers likely (70%) Saturday night,
• Cloudy and a bit cooler with a (30%) chance of snow showers Sunday, then rain and snow showers likely (70%) Sunday night.
• snow level 4,500 ft. this afternoon through Friday, 5,000 ft. Friday night, 4,500 ft. Saturday, then 3,000 ft. Saturday night.
• lows 33-25 warming to 27 Sunday night highs 36-33.
• Cloudy with rain and snow showers and a bit cooler Monday, mostly cloudy with a good (50%) chance of rain and snow showers Monday night,
• A slight (20%) chance of rain and snow showers and a bit warmer Tuesday, cloudy with a (40%) chance of rain and snow Tuesday night,
• Mostly cloudy and a bit cooler with rain and snow showers likely (70%) Wednesday, cloudy with a good (50%) chance of rain and snow showers at night,
• Then mostly cloudy with a good (50%) chance of rain and snow showers Thursday.
• snow level 2,500 ft. Sunday and Sunday night, 3,500 ft. Monday through Tuesday, 5,000 ft. Tuesday night, then 4,000 ft. Wednesday.
• highs 32-35 lows 22-26.

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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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