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 today, Saturday, Sunday and again next Tuesday. It looks like there will be snow on the Cascade Passes 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 5 in the Good category measuring Particulate Matter.

Oakridge: The Air Quality Index is 28 in the Good category measuring Particulate Matter.

Cottage Grove: The Air Quality Index is 19 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 FLOOD WARNING IS IN EFFECT FOR THE LUCKIAMUTE RIVER NEAR SUVER UNTIL SATURDAY MORNING.
• A FLOOD WARNING IS IN EFFECT FOR THE ALSEA RIVER NEAR TIDEWATER, THE GRAYS RIVER NEAR ROSBURG, THE MARYS RIVER NEAR FILOMATH, THE TUALATIN RIVER NEAR DILLEY, COQUILLE RIVER AT COQUILLE, THE SOUTH FORK OF THE COQUILLE RIVER AT MYRTLE POINT, AND THE NEHALEM RIVER NEAR FOSS.
• A FLOOD WATCH IS IN EFFECT THROUGH THIS EVENING FOR THE CENTRAL COAST RANGE OF WESTERN OREGON, THE CENTRAL OREGON COAST, THE CENTRAL WILLAMETTE VALLEY, THE COAST RANGE OF NORTHWEST OREGON, THE GREATER PORTLAND METRO AREA, THE NORTH OREGON COAST, AND THE SOUTH WILLAMETTE VALLEY.
• A WINTER WEATHER ADVISORY IS IN EFFECT UNTIL 10 PM TONIGHT FOR THE SOUTH CENTRAL OREGON CASCADES, THE SOUTH OREGON CASCADES AND THE SISKIYOU MOUNTAINS.
• A WINTER WEATHER ADVISORY IS IN EFFECT FROM 4 AM UNTIL 10 PM SATURDAY ABOVE 4,000 FT. FOR THE SOUTH CENTRAL OREGON CASCADES, THE SOUTH OREGON CASCADES AND THE SISKIYOU MOUNTAINS.
• A WINTER WEATHER ADVISORY IS IN EFFECT 7 AM UNTIL 10 PM SATURDAY FOR THE KLAMATH BASIN, NORTHERN AND EASTERN KLAMATH COUNTY, AND WESTERN LAKE COUNTY.
• A WIND ADVISORY IS IN EFFECT UNTIL 7 AM SATURDAY FOR NORTHERN AND EASTERN KLAMATH COUNTY, AND CENTRAL, EASTERN AND WESTERN LAKE COUNTY.
• A FLOOD WATCH IS IN EFFECT THROUGH SATURDAY MORNING FOR THE CURRY COUNTY COAST.
• 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:

• Rain and a bit cooler today (0.25 in. of rain possible), rain tonight (0.50 in. of rain possible),
• Cloudy with showers likely (70%) and a bit cooler Saturday (0.25 in. of rain possible) and in the evening, mostly cloudy with showers likely (70%) in the evening, a good (50%) chance of showers late Saturday night (0.25 in. of rain possible),
• Mostly cloudy with a (40%) chance of showers Sunday, then showers likely (70%) Sunday night.
• highs 52-48 lows 44-38 warming to 44 Sunday night.
• 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:

• Mostly cloudy with rain and a bit cooler this afternoon (0.25 in. of rain possible), a good (50%) chance of rain this evening, rain late tonight,
• AM Showers likely (70%), and a bit cooler Saturday (0.25 in. of rain possible, AM snow level 3,500 ft.), evening showers, rain and snow showers likely (70%) Saturday night (0.10 in. of rain possible, snow level 3,500 ft. falling to 2,500 ft. late at night),
• Cloudy with a (40%) chance of AM rain and snow showers, a good (50%) chance of showers Sunday afternoon (snow level 2,500 ft. rising to 3,500 ft.), showers likely (70%) late Sunday night.
• highs 52-49 lows 44-40.
• 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 and a bit cooler with coastal rain with a slight (20%) chance of thunderstorms while rain inland (0.50 in. of rain possible), rain tonight (0.75 in. of rain possible),
• AM coastal showers while inland AM showers likely (70%), showers with a slight (20%) chance of thunderstorms and a bit cooler Saturday afternoon and evening (0.25 in. of rain possible) 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 (30%) chance of showers and a bit warmer Sunday, showers likely (70%) Sunday night.
• highs 54-52 warming back to 54 Sunday lows 46-42 warming to 44 Sunday night.
• Mostly cloudy with showers likely (70%) 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:

• Mostly cloudy with rain and snow and a bit warmer today (0.25 in. of rain possible, 1-3 in. of snow possible), evening rain and snow likely (70%) tonight (0.25 in. of rain possible, 2 in. of snow possible),
• Rain and snow showers and a bit cooler Saturday (0.50 in. of rain possible, 2-5 i. of snow possible), rain and snow showers likely (70%) Saturday night,
• Cloudy and a bit cooler with a (40%) chance of snow showers Sunday, then rain and snow showers likely (70%) Sunday night.
• snow level 5,000 ft. today, 5,500 ft. tonight, 4,000 ft. Saturday, 3,000 ft. Saturday night and Sunday, then 3,500 ft. Sunday night.
• highs 36-33 lows 32-25 warming to 27 Sunday night.
• 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 4,000 ft. Monday, 3,500 ft. Monday night, 3,000 ft. Tuesday, 5,000 ft. Tuesday night, then 3,000 ft. Wednesday through Thursday.
• 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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