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 tries to move in Tuesday, but seems to go stationary just to our North. The graphics for days 3-7 show no frontal systems pushing through the Pacific Northwest through next Monday.

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Air Quality Index:

Eugene-Springfield: The Air Quality Index is 19 in the Good category measuring Particulate Matter.

Oakridge: The Air Quality Index is 19 in the Good category measuring Particulate Matter.

Cottage Grove: The Air Quality Index is 15 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,
• Partly cloudy Wednesday AM, mostly sunny and a bit cooler in the afternoon, partly cloudy in the evening, increasing clouds to mostly cloudy with a slight (20%) chance of showers late Wednesday night (under 0.10 in. of rain possible),
• Mostly cloudy with rain and a bit cooler Thursday, then showers likely (60%) and a bit cooler Thursday night.
• highs 75-58 lows 43-52 cooling to 44 Thursday night.
• Mostly cloudy with showers likely (60%) Friday through Saturday, a good (50%) chance of showers Saturday night,
• Mostly cloudy with a (40%) chance of showers Sunday (Mother’s Day), cloudy with a good (50%) chance of showers at night,
• Then mostly cloudy with showers likely (70%) Monday.
• highs near 58 lows 43-45. (seasonal averages high 66 low 43)

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Eugene-Springfield Pollen Count:

Grass………. Moderate (10)

Trees………. Moderate (56)

Last Counted: 5/8/17

Data Courtesy of Oregon Allergy Associates.

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Forecast for Roseburg:

• Sunny and a bit warmer today, mostly clear tonight,
• Partly cloudy Wednesday, increasing clouds to mostly cloudy with a (40%) chance of rain Wednesday night,
• Mostly cloudy and a bit cooler with rain Thursday, then showers likely (70%) and cooler at night.
• highs 77-60 lows 47-49 cooling back to 44 Thursday night.
• Mostly cloudy with showers likely (70%) Friday and Friday night,
• Mostly cloudy with showers likely (70%) and a bit warmer Saturday, a (30%) chance of showers Saturday night,
• Then mostly cloudy with a (40%) chance of showers Sunday (Mother’s Day) through Monday.
• highs 59-56 warming to 64 Monday lows 45-40 warming back to 45 Sunday night. (seasonal averages high 69 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, mostly clear tonight,
• Partly cloudy and a bit cooler Wednesday, becoming mostly cloudy with a slight (20%) chance of evening rain, rain likely (70%) late Wednesday night (0.25 in. of rain possible),
• Mostly cloudy and a bit cooler Thursday with rain Thursday and at night.
• highs 60-56 lows 46-50 cooling back to 46 Thursday night.
• Mostly cloudy  showers with likely (70%) and a bit cooler Friday, showers at night,
• Showers likely (60%) and a bit cooler Saturday, mostly cloudy with a (40%) chance of showers Saturday night and Sunday (Mother’s Day), a good (50%) chance of showers at night,
• Then mostly cloudy with showers likely (70%) Monday.
• highs 60-55 warming to 60 Monday lows 47-42 warming to 45 Sunday night (seasonal averages high 58 low 46)

 

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Forecast for the Cascades in Lane County:

• Mostly sunny and a bit warmer today, mostly clear tonight,
• Mostly sunny Wednesday AM, partly cloudy and a bit warmer with a slight (20%) chance of showers in the afternoon and Wednesday night,
• Mostly cloudy with rain and colder Thursday, then rain and snow showers likely (70%) at night.
• free air freezing level 11,000 ft. today, 12,000 ft. tonight, snow level above 8,000 ft. Wednesday and Wednesday night, 6,500 ft. Thursday, then 5,000 ft. Thursday night.
• highs 65-68 cooling to 50 Thursday lows 35-40 cooling to 30 Thursday night.
• Mostly cloudy with rain and snow showers likely (70%) and a bit cooler Friday through Saturday night,
• A mix of clouds and sun with a (40%) chance of showers Sunday (Mother’s Day), mostly cloudy with a (40%) chance of rain and snow showers at night,
• The mostly cloudy with rain and snow showers likely (70%) Monday.
• snow level 4,000 ft. Friday and Friday night, 3,500 ft. Saturday, 4,000 ft. Saturday night and Sunday, then 5,000 ft. Sunday night and Monday.
• highs near 43 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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