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 show the frontal system that brought rain chances back and the next front approaching today. The graphics for days 3-7 show not much frontal activity for the week. 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 2 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:

• A WINTER WEATHER ADVISORY IS IN EFFECT UNTIL 8 PM THIS EVENING FOR THE NORTHERN OREGON CASCADES AND THE CASCADES IN LANE COUNTY.
• A WINTER WEATHER ADVISORY IS IN EFFECT UNTIL 11 PM TONIGHT FOR THE SOUTH CENTRAL OREGON CASCADES, THE SOUTHERN OREGON CASCADES, AND THE SISKIYOU MOUNTAINS.
• 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 showers and a bit cooler this afternoon (0.50 in. of rain possible) and breezy (Wind: S 15-25 mph gusts to 35 mph), evening showers likely (70%), a slight (20%) chance of showers late tonight (0.10 in. of rain possible),
• Mostly cloudy with rain Tuesday (0.25 in. of rain possible), showers Tuesday night (0.25 in. of rain possible) and Wednesday, then mostly cloudy with a good (50%) chance of showers at night.
• highs near 55 lows 45-42.
• Mostly cloudy with a good (50%) chance of showers and a bit warmer Thursday and Thursday night,
• Cloudy with a good (50%) chance of showers and a bit warmer Friday, partly cloudy Friday night through Saturday night,
• Then a mix of clouds and sun and a bit warmer Sunday.
• highs 58-69 lows 38-42. (seasonal averages high 62 low 40)

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Eugene-Springfield Pollen Count:

Grass………. Low (3)

Trees………. Moderate (38)

Last Counted: 4/21/17

Data Courtesy of Oregon Allergy Associates.

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Forecast for Roseburg:

• Mostly cloudy with showers and a bit cooler this afternoon (0.50 in. of rain possible), cloudy with evening showers likely (70%), a slight (20%) chance of showers late tonight (0.10 in. of rain possible),
• Rain and a bit warmer Tuesday (0.25 in. of rain possible), evening showers likely (70%), showers late at night (0.25 in. of rain possible),
• Mostly cloudy with AM rain, showers likely (70%) Wednesday afternoon, then a good (50%) chance of showers Wednesday night.
• highs near 56 lows 45-49 cooling to 44 Wednesday night.
• Mostly cloudy with a good (50%) chance of showers Thursday and Thursday night,
• Mostly cloudy with a (30%) chance of AM rain and snow showers, a (30%) chance of showers and a bit warmer Friday, partly cloudy at night and Saturday (a bit warmer), mostly clear Saturday night,
• Then mostly cloudy and a bit warmer Sunday.
• highs 56-70 lows 42-44. (seasonal averages high 64 low 43)

 

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

• Mostly cloudy with afternoon showers (0.75 in. of rain possible), cloudy with a (30%) chance of coastal showers tonight while evening inland showers likely (70%) and a good (50%) chance of showers late tonight (under 0.10 in. of rain possible),
• Mostly cloudy with rain Tuesday (0.50 in. of rain possible), showers at night (0.25 in. of rain possible),
• AM rain Wednesday, mostly cloudy with showers likely (60%) in the afternoon, then a good (50%) chance of showers Wednesday night.
• highs near 55 lows 47-50 cooling to 46 Wednesday night.
• Mostly cloudy with a (40%) chance of showers and a bit cooler Thursday and at night,
• Mostly cloudy with a (30%) chance of showers and a bit warmer Friday, just partly cloudy Friday night and Saturday (a bit warmer), mostly clear at night,
• Then mostly cloudy and a bit cooler Sunday.
• highs 54-62 cooling to 58 Sunday lows near 44. (seasonal averages high 56 low 44)

 

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Forecast for the Cascades in Lane County:

• Mostly cloudy with rain and snow showers this afternoon (1.00 in. of rain possible, 5-11 in. of snow possible) and breezy (Wind: SW 10-15 mph increasing to SW 15-25 mph gusts to 40 mph this afternoon), evening rain and snow showers, a good (50%) chance of rain and snow showers late tonight (0.50 in. of rain possible, 1-3 in. of snow possible),
• Mostly cloudy with a good (50%) chance of AM rain and snow, rain and snow and a bit warmer Tuesday afternoon, rain and snow showers Tuesday night and Wednesday (a bit cooler), then rain and snow showers Wednesday night.
• snow level 4,500 ft. today, 4,000 ft. tonight and Tuesday, 6,000 ft. Tuesday night 4,000 ft. Wednesday then 4,500 ft. Wednesday night.
• highs 40-42 cooling back to 40 Wednesday lows 32-28.
• Mostly cloudy with rain and snow showers likely (70%) and a bit warmer Thursday through Friday, a slight (20%) chance of rain and snow showers Friday night,
• Partly cloudy and a bit warmer Saturday and at night,
• Then a mix of clouds and sun and a bit warmer Sunday.
• snow level 3,500 ft. Thursday and Thursday night, 3,000 ft. Friday, 4,000 ft. Friday night, free air freezing level 5,500 ft. Saturday, 7,500 ft. Saturday night, then 8,000 ft. Sunday.
• highs 40-56 lows 24-22 warming to 30 Saturday night.

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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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