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 Tuesday. The graphic for days 3-7 shows the next series of fronts that we will see approaching Oregon every other day- Tuesday, Thursday and Saturday with more to follow.

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Air Quality Index:

Eugene-Springfield: The Air Quality Index is 51 in the Moderate category measuring Particulate Matter.

Oakridge: The Air Quality Index is 45 in the Good category measuring Particulate Matter.

Cottage Grove: The Air Quality Index is 76 in the Moderate 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 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 a good (50%) chance of showers today (under 0.10 in. of rain possible), mostly cloudy with patchy fog late tonight,
• Cloudy with patchy fog a slight (20%) chance of AM rain, rain Tuesday and a bit cooler afternoon  and evening, showers late at night,
• Mostly cloudy and a bit cooler with showers likely (70%) Wednesday, then rain likely (70%) Wednesday night.
• highs 54-50 lows 39-42.
• Mostly cloudy with rain and a bit cooler Thursday (Thanksgiving Day) through Friday, rain likely (70%) Friday night,
• Rain and a bit warmer Saturday, rain likely (70%) at night,
• Then mostly cloudy with showers likely (70%) Sunday.
• highs 50-52 cooling back to 50 Sunday lows near 50. (seasonal averages high 50 low 37)
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Your College Football Forecast:

Saturday November 26th- The Civil War Game:

Ducks vs Beavers at Reser Stadium, Corvallis – Kickoff: 1:00 PM PST – Too soon for an accurate weather forecast, but as of now it looks like a rainy day with temperatures from 45 to 50 by the end of the game.

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Forecast for Roseburg:

• Mostly cloudy with AM showers likely (70%), a good (50%) chance of showers and a bit cooler this afternoon, a slight (20%) chance of evening showers, patchy fog late tonight,
• AM fog with a slight (20%) chance of showers, showers Tuesday afternoon and evening, showers likely (70%) Tuesday night,
• Mostly cloudy with AM rain and snow showers likely (70%), showers likely (70%) and a bit cooler Wednesday afternoon, then rain likely (70%) Wednesday night.
• highs near 54 lows 42-45.
• Mostly cloudy and a bit cooler with rain Thursday (Thanksgiving Day) and Thursday night,
• Mostly cloudy with rain likely (70%) and a bit warmer Friday, cloudy with a (40%) chance of rain at night,
• Cloudy and a bit warmer with rain Saturday and Saturday night,
• Then mostly cloudy with rain likely (70%) and a bit warmer Sunday.
• highs 52-54 lows 42-46 cooling to 44 Sunday. (seasonal averages high 51 low 40)

 

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

• Mostly cloudy with AM coastal showers likely (70%), a bit cooler with a good (50%) chance of showers this afternoon while a good (50%) chance of inland showers today, mostly cloudy with a slight (20%) chance of coastal rain late tonight while inland patchy fog late tonight,
• Mostly cloudy with AM coastal rain likely (70%) while areas of AM fog and a good (50%) chance of inland rain, showers Tuesday afternoon, coastal showers with a slight (20%) chance of thunderstorms at night while evening inland showers and showers likely (70%) late Tuesday night,
• Mostly cloudy with showers likely (70%) and a slight (20%) chance of AM thunderstorms, showers likely (70%) and a bit cooler Wednesday afternoon, then rain Wednesday night.
• highs 56-54 lows near 46.
• Mostly cloudy with rain and breezy and a bit cooler Thursday (Thanksgiving Day) and Thursday night,
• Cloudy and a bit warmer with rain Friday through Saturday night,
• Then mostly cloudy with rain likely (70%) and a bit warmer Sunday.
• highs 53-57 lows 46-50. (seasonal averages high 54 low 42)

 

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Forecast for the Cascades in Lane County:

• Mostly cloudy with rain and snow showers and a bit cooler today (0.10 in. of rain possible, 2 in. of snow possible), mostly cloudy this evening, just partly cloudy late tonight,
• A mix of clouds and sun early with clouds increasing and a bit warmer with rain and snow Tuesday afternoon, evening rain and snow, rain and snow showers late at night,
• Mostly cloudy and bit cooler with rain and snow showers likely (70%) Wednesday, then rain and snow Likely (70%) Wednesday night.
• snow level 4,500 ft. today, free air freezing level 5,500 ft. falling to 5,000 ft. late tonight, snow level 5,000 ft. Tuesday afternoon, 4,500 ft. falling to 3,500 ft. late Tuesday night, then 3,000 ft. Wednesday and Wednesday night.
• highs 40-42 cooling to 36 Wednesday lows near 28.
• Mostly cloudy with snow and rain and a bit cooler Thursday (Thanksgiving Day), snow and rain Thursday night and Friday, snow and rain likely (70%) Friday night,
• Mostly cloudy with snow and rain Saturday and Saturday night,
• Then rain and snow showers likely (70%) Sunday.
• snow level 3,500 ft. Thursday, 4,000 ft. Thursday night, 3,500 ft. Friday, then 3,000 ft. Friday night through Sunday.
• highs 34-36 lows near 30.

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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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