Here is my weekly weather quiz question. What is “Aurora Australis?” 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 moving out of the Gulf of Alaska to keep the rain chances with us for a while. The graphics for days 1-3 show the next frontal system pushing through Oregon today. The graphics for days 3-7 show frontal systems attempting to break through high pressure to get into the Pacific Northwest through next Monday.

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Air Quality Index:

Eugene-Springfield: The Air Quality Index is 10 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:

• A WINTER WEATHER ADVISORY IS IN EFFECT THROUGH 9 PM THIS EVENING FOR THE NORTH OREGON CASCADES AND THE CASCADES IN LANE COUNTY.
• A WINTER WEATHER ADVISORY IS IN EFFECT THROUGH 8 PM THIS EVENING FOR THE SOUTH CENTRAL OREGON CASCADES, THE SOUTHERN OREGON CASCADES, AND THE SISKIYOU MOUNTAINS.
• A WIND ADVISORY IS IN EFFECT FROM 2 PM UNTIL 11 PM TODAY FOR CENTRAL AND EASTERN LAKE COUNTY.
• A 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 slight (20%) chance of isolated thunderstorms with small hail possible and a bit cooler this afternoon (0.25 in. of rain possible, more in storms), showers likely (70%) with a slight (20%) chance of evening thunderstorms, a good (50%) chance of showers late tonight (0.10 in. of rain possible, more in storms),
• A mix of clouds and sun and a bit warmer with a slight (20%) chance of showers Wednesday, then just partly cloudy late Wednesday night through Thursday night.
• highs 54-70 lows 45-37 warming to 42 Thursday night.
• Mostly sunny and a bit warmer Friday, Saturday, and Sunday, mostly clear each night,
• Then mostly sunny Monday.
• highs 75-80 lows 44-48. (seasonal averages high 67 low 44)

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Eugene-Springfield Pollen Count:

Grass………. Moderate (19)

Trees………. Moderate (73)

Last Counted: 5/10/17

Data Courtesy of Oregon Allergy Associates.

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Forecast for Roseburg:

• Mostly cloudy with AM rain, showers this afternoon ( 0.50 in. of rain possible, snow level 3,500 ft.), a (40%) chance of rain and snow showers tonight (under 0.10 in. of rain possible, snow level 3,500 ft.),
• Mostly cloudy with a slight (20%) chance of showers in the AM (snow level 3,500 ft.), just partly cloudy and a bit warmer Wednesday afternoon, partly cloudy Wednesday night,
• Partly cloudy and a bit warmer Thursday, then mostly clear at night.
• highs 56-73 lows 43-46.
• Then mostly sunny and a bit warmer Friday, Saturday, Sunday, and Monday, mostly clear each night.
• highs 80-84 lows 48-53. (seasonal averages high 70 low 47)

 

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

• Mostly cloudy with rain this AM, showers likely (70%) and a bit cooler this afternoon, (0.25 in. of rain possible), a slight (20%) chance of showers tonight (under 0.10 in. of rain possible),
• Mostly cloudy Wednesday AM, partly cloudy and a bit warmer in the afternoon through Thursday night.
• highs 55-62 lows 47-45 warming back to 47 Thursday night.
• Mostly sunny and a bit warmer Friday, Saturday, Sunday, and Monday, mostly clear each night,
• highs 63-60 warming to 70 Monday lows 50-53. (seasonal averages high 59 low 47)

 

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Forecast for the Cascades in Lane County:

• Mostly cloudy with rain and snow showers and a slight (20%) chance of isolated thunderstorms and a bit cooler this afternoon and evening (0.75 in. of rain possible, 5-9 in. of snow possible), rain and snow showers decreasing late tonight (0.25 in. of rain possible, 1-4 in. of rain possible),
• Mostly cloudy with a (30%) chance of rain and snow showers and a bit warmer Wednesday, partly cloudy with a slight (20%) chance of evening showers, just partly cloudy late Wednesday night through Thursday night.
• snow level 4,500 ft. today, 3,500 ft. tonight, 4,500 ft. Wednesday, 5,500 ft. Wednesday night, free air freezing level 7,500 ft. Thursday, then 9,000 ft. Thursday night.
• highs 38-56 lows 29-26 warming to 32 Thursday night .
• Mostly sunny and a bit warmer Friday, Saturday, Sunday and Monday, mostly clear each night.
• free air freezing level 10,000 ft. Friday, 11,000 ft. Friday night through Sunday night, then 12,000 ft. Monday.
• highs 64-68 lows 35-39.

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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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