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 High Pressure Ridge (Shaded “Arch” shape with blue arrows) has taken over returning the sunny skies and warming us up again. The graphics for days 1-3 show the next front that will move in Tuesday. The graphics for days 3-7 show a frontal system pushing through the Pacific Northwest Thursday.

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Air Quality Index:

Eugene-Springfield: The Air Quality Index is 12 in the Good category measuring Particulate Matter.

Oakridge: The Air Quality Index is 13 in the Good category measuring Particulate Matter.

Cottage Grove: The Air Quality Index is 8 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 sunny and a bit warmer today, mostly clear tonight,
• Sunny and a bit warmer Tuesday, partly cloudy at night and Wednesday, mostly cloudy Wednesday night.
• highs 72-75 cooling back to 72 Wednesday lows 40-49.
• Mostly cloudy with rain and a bit cooler Thursday, showers likely (60%) and a bit cooler Thursday night and Friday, mostly cloudy with a good (50%) chance of showers Friday night through Saturday night,
• Then cloudy and a bit cooler with a (40%) chance of showers Sunday (Mother’s Day).
• highs near 58 lows near 44. (seasonal averages high 66 low 42)

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Eugene-Springfield Pollen Count:

Grass………. Low (0)

Trees………. High (191)

Last Counted: 5/3/17

Data Courtesy of Oregon Allergy Associates.

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Forecast for Roseburg:

• Sunny and a bit warmer today and Tuesday, mostly clear both nights,
• Partly cloudy Wednesday AM, increasing clouds to mostly cloudy and a bit cooler in the afternoon, then rain Wednesday night.
• highs 74-78 lows 46-49.
• Mostly cloudy and a bit cooler with rain Thursday, showers likely (70%) and cooler at night,
• Mostly cloudy with a good (50%) chance of showers Friday and Friday night,
• Mostly cloudy with a (40%) chance of AM showers, showers likely (70%) and a bit warmer Saturday afternoon,  then mostly cloudy and a bit cooler with a (30%) chance of showers Saturday night and Sunday (Mother’s Day).
• highs near 58 lows 42-45. (seasonal averages high 68 low 46)

 

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

• Sunny and a bit warmer today and Tuesday, mostly clear both nights,
• Mostly cloudy and a bit cooler Wednesday, then mostly cloudy with rain Wednesday night.
• highs near 60 lows 47-49.
• Mostly cloudy with rain and a bit cooler Thursday, showers likely (70%) and a bit cooler Thursday night and Friday, a good (50%) chance of showers Friday night,
• A (40%) chance of AM showers, showers likely (60%) and a bit cooler Saturday afternoon, mostly cloudy with a (40%) chance of showers at night,
• Then mostly cloudy and a bit warmer with a good (50%) chance of showers Sunday (Mother’s Day).
• highs near 56 lows near 46. (seasonal averages high 58 low 46)

 

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Forecast for the Cascades in Lane County:

• Sunny and a bit warmer today, mostly clear tonight,
• Mostly sunny and a bit warmer Tuesday, partly cloudy Tuesday night,
• Partly cloudy and a bit warmer with a slight (20%) chance of showers Wednesday afternoon, mostly cloudy with a good (50%) chance of evening showers, then showers likely (70%) late Wednesday night.
• free air freezing level 11,000 ft. today, 11,000 ft. falling to 9,000 ft. late tonight, 10,000 ft. Tuesday, 12,000 ft. Tuesday night, then snow level above 8,000 ft. Wednesday and Wednesday night.
• highs 62-68 lows 33-38.
• Rain likely and a bit cooler Thursday, rain and snow showers likely (70%) at night,
• Rain and snow showers likely (70%) and a bit cooler Friday, then a good (50%) chance of rain and snow showers and a bit warmer Friday night and Saturday night,
• Then cloudy with a good (50%) chance of showers Sunday (Mother’s Day).
• snow level 7,000 ft. Thursday, 5,000 ft. Thursday night, 3,500 ft. Friday, 4,000 Friday night, then 3,500 ft. Saturday through Sunday.
• highs 50-42 warming to 44 Sunday 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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