Here is my weekly weather quiz question for the last time. What is “Aurora Australis?” Here is the correct answer. Aurora Australis is the same as Aurora Borealis, but in the Southern Hemisphere. Also known as the southern lights; the luminous, radiant emission from the upper atmosphere over middle and high latitudes, and centred around the earth’s magnetic poles. These silent fireworks are often seen on clear winter nights in a variety of shapes and colors. I’ll have a new weekly weather quiz question for you Monday. 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) really heats us up. The graphics for days 1-3 show the next frontal system that will approach Oregon Between Tuesday and Wednesday. The graphics for days 3-7 show that frontal system after it passes through the Pacific Northwest.

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Air Quality Index:

Eugene-Springfield: The Air Quality Index is 20 in the Good category measuring Particulate Matter.

Oakridge: The Air Quality Index is 14 in the Good category measuring Particulate Matter.

Cottage Grove: The Air Quality Index is 9 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 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:

• Clear tonight,
• Sunny and hot Monday, clear at night,
• Sunny and a bit cooler Tuesday, mostly clear Tuesday night,
• Mostly sunny and cooler Wednesday, then partly cloudy Wednesday night.
• lows 54-57 cooling to 47 Wednesday night highs 90-70.
• Partly cloudy and a bit warmer Thursday through Friday night,
• Mostly sunny and a bit warmer Saturday, clear at night,
• Then sunny and a bit warmer Sunday.
• highs 72-77 lows near 50. (seasonal averages high 68 low 44)

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Eugene-Springfield Pollen Count:

Grass………. Moderate (6)

Trees………. Moderate (25)

Last Counted: 5/18/17

Data Courtesy of Oregon Allergy Associates.

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Forecast for Roseburg:

• Mostly clear tonight,
• Mostly sunny and hot Monday, clear Monday night,
• Sunny and a bit cooler Tuesday, mostly clear in the evening, partly cloudy late at night,
• Mostly cloudy with areas of fog Wednesday AM, sunny and much cooler in the afternoon, partly cloudy Wednesday night.
• lows 57-46 highs 95-72.
• Mostly sunny and a bit warmer Thursday and Friday, mostly clear both nights,
• Sunny Saturday, mostly clear at night,
• Then mostly sunny and a bit warmer Sunday.
• highs 73-79 lows near 52. (seasonal averages high 71 low 48)

 

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

• Clear tonight,
• Patchy AM fog coastal fog otherwise sunny and a bit warmer Monday, mostly clear at night,
• Mostly sunny but cooler Tuesday, mostly clear in the evening, mostly cloudy at night with patchy coastal fog late Tuesday night,
• Mostly cloudy with areas of AM fog, then partly cloudy and a bit cooler Wednesday afternoon and at night.
• lows 55-47 highs 72-59.
• Partly cloudy and just a bit warmer Thursday through Saturday, mostly clear Saturday night,
• Then mostly sunny and a bit warmer Sunday.
• highs near 62 lows near 50. (seasonal averages high 59 low 48)

 

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Forecast for the Cascades in Lane County:

• Clear tonight,
• Sunny and warmer Monday, clear at night,
• Sunny and a bit cooler Tuesday, partly cloudy and a bit cooler Tuesday night,
• Mostly sunny and cooler Wednesday with a slight (20%) chance of showers in the afternoon, partly cloudy with a slight (20%) chance of showers in the evening, just partly cloudy late Wednesday night.
• free air freezing level 13,000 ft. tonight, 14,000 ft. Monday and Monday night, 14,000 ft. rising to 15,000 ft. Tuesday afternoon, 15,000 ft. Tuesday night, 14,000 ft. Wednesday AM,  snow level 8,000 ft. Wednesday afternoon, above 8,000 ft. Wednesday evening, free air freezing level 7,500 ft. late Wednesday night.
• lows 50-37 highs 78-60.
• Partly cloudy and cooler Thursday with a slight (20%) chance of showers in the afternoon and Thursday night,
• A mix of clouds and sun and a bit warmer with a slight (20%) chance of showers Friday afternoon, partly cloudy with a slight (20%) chance of evening showers, partly cloudy and a bit warmer late Friday night through Saturday night,
• Then mostly sunny and a bit warmer Sunday.
• snow level 7,000 ft. Thursday and Thursday night, 7,500 ft. Friday, 8,000 ft. Friday night, free air freezing level 9,000 ft. rising to 10,000 ft. Saturday afternoon, 10,000 ft. rising to 11,000 ft. Saturday night, then 11,000 ft. Sunday.
• highs 62-68 lows near 40.

 

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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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