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. Look at the graphic for days 1-3 shows the frontal system that moves in today. 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 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 13 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 28 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 WATCH IS IN EFFECT FROM WEDNESDAY EVENING THROUGH THURSDAY EVENING FOR THE NORTH OREGON COAST AND THE CENTRAL OREGON COAST.
• A WINTER WEATHER ADVISORY IS IN EFFECT UNTIL 6 AM WEDNESDAY ABOVE 3,500 FT. FOR THE NORTH OREGON CASCADES AND THE CASCADES IN LANE COUNTY.
• A WINTER WEATHER ADVISORY IS IN EFFECT UNTIL 1 AM WEDNESDAY ABOVE 4,500 FT. FOR THE SOUTH CENTRAL OREGON CASCADES, THE SOUTHERN OREGON CASCADES, AND THE SISKIYOU MOUNTAINS.
• A HIGH WIND WATCH IS IN EFFECT FROM LATE WEDNESDAY NIGHT THROUGH LATE THURSDAY NIGHT FOR THE SOUTH CENTRAL OREGON COAST AND THE CURRY COUNTY COAST.
• A WIND ADVISORY IS IN EFFECT UNTIL 1 AM WEDNESDAY FOR NORTHERN AND EASTERN KLAMATH COUNTY, AND WESTERN, CENTRAL, AND EASTERN LAKE COUNTY.
• 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 with rain this evening, showers late tonight (0.25 in. of rain possible),
• Mostly cloudy and a bit cooler with showers Wednesday (0.25 in. of rain possible), rain likely (70%) Wednesday night (0.50 in. of rain possible) and breezy (Wind: S 15-25 mph gusts to 35 mph),
• Mostly cloudy with rain Thursday (Thanksgiving Day) and breezy (Wind: S 15-25 mph gusts to 35 mph decreasing to S 10-15 mph in the afternoon), then rain (possibly heavy at times) late Thursday night,
• Mostly cloudy with rain and a bit cooler Friday, then showers likely (70%) Friday night.
• lows near 44 highs 52-47.
• 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 47-50 lows 40-43 cooling back to 40 Monday night. (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 evening showers, showers with a slight (20%) chance of thunderstorms late tonight (0.25 in. of rain possible, gusty winds and small hail possible),
• Mostly cloudy with AM rain and snow showers likely (70%) and a slight (20%) chance of thunderstorms (gusty winds and small hail possible), showers likely (70%) and a bit cooler Wednesday afternoon (0.10 in. of rain possible, snow level 3,000 ft. rising to 3,500 ft. in the afternoon), evening rain likely (70%), a good (50%) chance of rain late Wednesday night (under 0.10 in. of rain possible),
• Mostly cloudy and a bit cooler (AM snow level 3,500 ft.) with rain Thursday (Thanksgiving Day) and Thursday night.
• highs 52-46 lows 42-44 cooling back to 42 Thursday night.
• Mostly cloudy with rain and a slight (20%) chance of thunderstorms and a bit warmer Friday, evening rain likely (70%), showers likely late (70%) Friday night,
• Cloudy with AM rain showers, showers and a bit warmer Saturday afternoon and at night,
• Cloudy with rain a good (50%) chance of rain and snow showers Sunday AM, a good (50%) chance of afternoon showers and a bit warmer, rain Sunday night,
• Rain likely (70%) Monday, showers likely (70%) at night,
• Then mostly cloudy with a slight (20%) chance of showers Tuesday.
• highs 47-52  lows 40-43 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 and a slight (20%) chance of thunderstorms tonight, gusty winds and small hail possible late tonight (0.25 in. of rain possible),
• AM showers with a slight (20%) chance of thunderstorms (gusty winds and small hail possible), showers a bit cooler Wednesday afternoon (0.25 in. of rain possible), evening rain likely (70%), rain late at night (0.25 in. of rain possible) and breezy (Wind: S 20-30 mph at the shore while S 10-20 mph inland, gusts to 40 mph)
• Mostly cloudy with AM rain (possibly heavy at times), rain with a slight (20%) chance of thunderstorms Thursday afternoon and windy (Wind: S 20-30 at the shore while S 15-20 mph inland), rain (possibly heavy at times) and breezy (Wind: S 15-25 mph increasing to S 25-35 mph late at night at the shore while S 15-20 mph inland ) Thursday night,
• Mostly cloudy and a bit cooler with rain and a slight (20%) chance of thunderstorms Friday, evening rain likely (70%), then showers likely (70%) late Friday night.
• lows 45-48 highs 54-49.
• Mostly cloudy with showers Saturday and at night,
• Cloudy with a good (50%) chance of showers and a bit warmer Sunday, rain Sunday night and Monday, showers likely (70%) Monday night,
• Then mostly cloudy with a slight (20%) chance of showers Tuesday.
• highs 52-54 lows 44-46. (seasonal averages high 53 low 42)

 

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Forecast for the Cascades in Lane County:

• Mostly cloudy with evening snow and rain, rain and snow showers late tonight (0.50 in. of rain possible, 3-7 in. of snow possible),
• Mostly cloudy and bit cooler with rain and snow showers likely (70%) Wednesday (0.25 in. of rain possible, 1-3 in. of snow possible), cloudy with a (%) chance of evening snow and rain, snow and rain likely (70%) late Wednesday night (0.25 in. of rain possible, 1-3 in. of snow possible) and breezy (Wind: SW 10-15 mph increasing and shifting to S 15-25 mph gusts to 40 mph late Wednesday night),
• Then mostly cloudy with snow and rain and a bit cooler Thursday (Thanksgiving Day), rain and snow Thursday night and Friday, then rain and snow showers likely (70%) Friday night.
• snow level 3,500 ft. tonight, 3,000 ft. Wednesday, 3,500 ft. Wednesday night, 4,500 ft. Thursday and Thursday night,
• Mostly cloudy with rain and snow Friday, then rain snow showers likely (70%) Friday night.
• lows 28-30 cooling back to 28 Friday night highs near 36.
• 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 rain and snow showers, snow and rain Sunday night,
• Rain and snow showers and a bit warmer Monday and Monday night,
• Then mostly cloudy with a slight (20%) chance of rain and snow showers Tuesday.
• snow level 3,500 ft. Saturday, 3,000 ft. Saturday night and Sunday,  4,000 ft. Sunday night and Monday, 3,500 ft. Monday night, then 4,500 ft. Tuesday.
• highs near 32 lows 24-28.

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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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