Here is my 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 that moves through Wednesday. The graphics for days 3-7 show not much frontal activity for the week until a front moves in Sunday.

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 5 in the Good category measuring Particulate Matter.

Oakridge: The Air Quality Index is 8 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 tonight (0.50 in. of rain possible),
• Mostly cloudy with rain Wednesday AM, showers likely (70%) in the afternoon (0.25 in. of rain possible), a (40%) chance of evening showers, a slight (20%) chance of showers late Wednesday night (0.10 in. of rain possible),
• Mostly cloudy with a good (50%) chance of showers Thursday (0.10 in. of rain possible), a (40%) chance of evening showers, a slight (20%) chance of showers late at night (under 0.10 in. of rain possible),
• Partly cloudy with a slight (20%) chance of showers and a bit warmer Friday, then just partly cloudy Friday night.
• lows 48-37 highs 56-59.
• Partly cloudy and a bit warmer Saturday, partly cloudy with a slight (20%) chance of rain Saturday night,
• A mix of clouds and sun and a bit cooler with a slight (20%) chance of showers Sunday, partly cloudy at night,
• Then partly cloudy and a bit cooler Monday through Tuesday (a bit warmer).
• highs 66-60 warming to 62 Tuesday lows 44-39. (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 tonight (0.50 in. of rain possible),
• Mostly cloudy with rain Wednesday (0.50 in. of rain possible), a slight (20%) chance of showers at night,
• Mostly cloudy and a bit warmer with a (30%) chance of showers Thursday (under 0.10 in. of rain possible, snow level 3,500 ft.), a slight (20%) chance of showers at night (under 0.10 in. of rain possible),
• Partly cloudy with a slight (20%) chance of showers and a bit warmer Friday, then just partly cloudy Friday night.
• lows 50-39 highs 56-63.
• Mostly sunny and a bit warmer Saturday, partly cloudy at night,
• Mostly cloudy and a bit cooler with a slight (20%) chance of showers Sunday, just mostly cloudy Sunday night and Monday (a bit cooler), then partly cloudy Monday night and Tuesday (and a bit warmer).
• highs near 63 lows 47-43. (seasonal averages high 65 low 43)

 

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

• Mostly cloudy with rain tonight (0.50 in. of rain possible) and Wednesday AM, a (40%) chance of coastal afternoon showers while afternoon showers likely (70%) inland (0.50 in. of rain possible), a (40%) chance of showers Wednesday night (under 0.10 in. of rain possible),
• Mostly cloudy with a slight (20%) chance of showers Thursday (0.10 in. of rain possible), mostly cloudy with a slight (20%) chance of evening showers, partly cloudy with a slight (20%) chance of showers at night,
• Mostly sunny and a bit warmer Friday, then clear Friday night.
• lows 52-42 highs 55-59.
• Mostly sunny and warmer Saturday, mostly clear at night,
• Mostly cloudy and a bit cooler with a slight (20%) chance of showers Sunday, mostly cloudy Sunday night and Monday, then just partly cloudy Monday night and Tuesday (a bit warmer),
• highs 62-57 warming back to 62 Tuesday lows 47-44. (seasonal averages high 56 low 44)

 

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Forecast for the Cascades in Lane County:

• Mostly cloudy with rain tonight (0.75 in. of rain possible),
• AM rain, rain and snow showers Wednesday afternoon (0.75 in. of rain possible, 2-5 in. of snow possible), 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, a good (50%) chance of rain and snow showers late at night,
• Partly cloudy with a (30%) chance of AM snow showers and a slight (20%) chance of showers, a slight (20%) chance of rain and snow showers and a bit warmer Friday afternoon, then partly cloudy Friday night.
• snow level 6,500 ft. tonight 5,500 ft. Wednesday, 4,500 ft. Wednesday night, 3,000 ft. Thursday, 4,000 ft. Thursday night, 3,500 ft. Friday, then free air freezing level 7,500 ft. Friday night.
• lows 34-23 highs 40-37 warming to 43 Friday.
• Partly cloudy and a bit warmer Saturday and at night,
• A mix of clouds and sun and a bit cooler with a slight (20%) chance of showers Sunday, just partly cloudy Sunday night,
• A mix of clouds and sun and a bit cooler Monday, mostly cloudy at night,
• Then partly cloudy and a bit warmer Tuesday.
• snow level  free air freezing level 7,500 ft. Saturday, 9,000 ft. Saturday night, snow level 7,000 ft. Sunday, free air freezing level 7,000 ft. Sunday night, 5,500 ft. Monday and Monday night, then 6,000 ft. Tuesday.
• highs 42-45 warming to 48 Tuesday lows near 29.

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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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