Here is my new weekly weather quiz question. What is “ Attenuation?” The first person to post the correct answer as a comment on this page 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 with blue arrows) is controlling our weather. The graphics for days 1-3 shows the next front approaching today and moves through Wednesday. The graphics for days 3-7 show not much frontal activity for the week until a front moves in Sunday. The upper low will be the main instrument of rain for the Pacific Northwest.

Note: Willamette Pass, Hoodoo, and Mt. Ashland are all closed for the season. Check out their websites for any deals on events and lift tickets for next year.

 

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Air Quality Index:

Eugene-Springfield: The Air Quality Index is 4 in the Good category measuring Particulate Matter.

Oakridge: The Air Quality Index is 9 in the Good category measuring Particulate Matter.

Cottage Grove: The Air Quality Index is 1 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: 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:

• Permanent Health Advisory remains 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.

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

• Mostly cloudy with rain this afternoon (0.10 in. of rain possible), rain tonight (0.50 in. of rain possible),
• Mostly cloudy with rain Wednesday AM, a good (50%) chance of showers likely (70%) in the afternoon, (0.25 in. of rain possible), a slight (20%) chance of showers late Wednesday night (under 0.10 in. of rain possible),
• Mostly cloudy with a good (50%) chance of showers and a bit warmer Thursday, a (40%) chance of evening showers, then a slight (20%) chance of showers at night.
• highs near 57 lows 48-38.
• Partly cloudy with a slight (20%) chance of showers and a bit warmer Friday, just partly cloudy Friday night through Saturday night,
• A mix of clouds and sun with a slight (20%) chance of showers Sunday, partly cloudy with a slight (20%) chance of showers at night,
• Then a mix of clouds and sun and a bit cooler Monday.
• highs 58-63 cooling to 60 Monday lows 38-42. (seasonal averages high 63 low 40)

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Eugene-Springfield Pollen Count:

Grass………. Moderate (16)

Trees………. High (326)

Last Counted: 4/22/17

Data Courtesy of Oregon Allergy Associates.

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Forecast for Roseburg:

• Cloudy with rain this afternoon (0.10 in. of rain possible) and tonight (0.25 in. of rain possible),
• Mostly cloudy with rain Wednesday, a slight (20%) chance of showers at night,
• Then mostly cloudy with a (30%) chance of showers Thursday (snow level 3,500 ft.), a slight (20%)n chance of showers Thursday night (under 0.10 in. of rain possible).
• highs 55-58 lows 50-39.
• Partly cloudy with a slight (20%) chance of showers and a bit warmer Friday, just partly cloudy at night through Sunday night,
• Then mostly cloudy and a bit cooler with a slight (20%) chance of showers Monday.
• highs 62-68 cooling to 65 Monday lows 40-46. (seasonal averages high 65 low 43)

 

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

• Cloudy with rain this afternoon (0.50 in. of rain possible) and tonight (0.50 in. of rain possible),
• AM rain coastal Wednesday with rain likely (70%) in the afternoon, while inland afternoon rain (0.25 in. of rain possible), a slight (20%) chance of showers Wednesday night (under 0.10 in. of rain possible),
• Then mostly cloudy with a slight (20%) chance of showers Thursday and at night.
• highs near 55 lows 52-42.
• Partly cloudy with a slight (20%) chance of showers and a bit warmer Friday, just partly cloudy Friday night through Sunday night,
• Then mostly cloudy and a bit cooler with a slight (20%) chance of showers Monday.
• highs 58-60 cooling to 57 Monday lows 43-46. (seasonal averages high 56 low 44)

 

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Forecast for the Cascades in Lane County:

• Mostly cloudy with rain and snow and a bit warmer this afternoon (0.10 in. of rain possible, 1 in. of snow possible), rain tonight (0.75 in. of rain possible),
• AM rain, increasing rain and a bit cooler Wednesday afternoon, evening rain and snow showers likely (70%), a good (50%) chance of rain and snow showers and colder at night,
• Mostly cloudy with rain and snow showers likely (70%) and a bit cooler Thursday and in the evening, then a good (50%) chance of rain and snow showers late Thursday night.
• snow level 5,000 ft. this afternoon, 6,500 ft. tonight 6,000 ft. Wednesday, 4,000 ft. Wednesday night, 3,500 ft. Thursday and Thursday night.
• highs 43-38 lows 33-25.
• A mix of clouds and sun and a bit warmer with a good (50%) chance of rain and snow showers Friday, partly cloudy Friday night,
• Partly cloudy and a bit warmer Saturday and at night,
• A mix of clouds and sun with a (30%) chance of showers Sunday, just partly cloudy Sunday night,
• Then a mix of clouds and sun and a bit cooler Monday.
• snow level 4,000 ft. Friday, free air freezing level 5,500 ft. Friday night, 7,500 ft. Saturday, 9,000 ft. Saturday night, snow level above 8,000 ft. Sunday, free air freezing level 8,000 ft. Sunday night, then 7,000 ft. Monday.
• highs 42-50 cooling to 47 Monday lows 23-30.

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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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