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 12 in the Good category measuring Particulate Matter.

Oakridge: The Air Quality Index is 11 in the Good category measuring Particulate Matter.

Cottage Grove: The Air Quality Index is 2 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 clear tonight,
• Mostly sunny and a bit warmer Tuesday, mostly clear at night,
• 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 good (50%) 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.
• lows 40-52 cooling to 44 Thursday night highs 75-58.
• Mostly cloudy with showers likely (60%) Friday through Saturday, a good (50%) chance of showers 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 showers at night,
• Then mostly cloudy with a good (50%) chance of showers Monday.
• highs near 58 lows 43-45. (seasonal averages high 66 low 42)

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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:

• Mostly clear tonight,
• Sunny and a bit warmer Tuesday, mostly clear at night,
• Partly cloudy Wednesday, increasing clouds to mostly cloudy with rain Wednesday night,
• Mostly cloudy and a bit cooler with rain Thursday, then rain likely (70%) and cooler at night.
• lows 44-49 cooling back to 44 Thursday night highs 77-60.
• Mostly cloudy with a 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 (30%) 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 68 low 46)

 

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

• Clear tonight,
• Sunny and a bit warmer Tuesday, mostly clear at night,
• Partly cloudy and a bit cooler Wednesday, becoming mostly cloudy with a slight (20%) chance of evening rain, rain likely (70%) Wednesday night (0.25 in. of rain possible),
• Mostly cloudy and a bit cooler Thursday with rain Thursday and at night.
• lows 46-50 cooling back to 46 Thursday night highs 60-56.
• 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 58-55 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 clear tonight,
• Mostly sunny and a bit warmer Tuesday, mostly clear at night,
• Mostly sunny Wednesday AM, partly cloudy and a bit warmer with a slight (20%) chance of showers in the afternoon and evening, becoming mostly cloudy late Wednesday night,
• Mostly cloudy with rain and colder Thursday, then rain and snow showers likely (70%) at night.
• free air freezing level 10,000 ft. falling to 9,000 ft. late tonight, 10,000 ft. Tuesday, 12,000 ft. Tuesday night, snow level above 8,000 ft. Wednesday and Wednesday night, 6,500 ft. Thursday, then 5,000 ft. Thursday night.
• lows 32-40 cooling to 30 Thursday night highs 65-68 cooling to 50 Thursday.
• 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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