Here is my weekly weather quiz question. What is the “ Automated Surface Observing System (ASOS)?” 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) took over and will keep warming us up today and Thursday. The graphics for days 1-3 shows the warm front that swept through bringing warmer air. A cold front will follow between tonight and Thursday. The graphics for days 3-7 show another frontal system that will push into our area between next Thursday night and Friday.

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Air Quality Index:

Eugene-Springfield: The Air Quality Index is 11 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 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:

• 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:

• Partly cloudy  this AM, mostly sunny and warmer this afternoon, mostly clear tonight,
• Partly cloudy with a slight (20%) chance of showers and thunderstorms Thursday afternoon (under 0.10 in. of rain possible), showers likely (70%) with a slight (20%) chance of thunderstorms in the evening, mostly cloudy with showers likely (70%) late Thursday night (0.10 in. of rain possible),
• Mostly cloudy with a good (50%) chance of AM showers, showers likely (70%) and much cooler Friday afternoon, then a (40%) chance of showers much cooler at night.
• highs 80-59 lows 54-42.
• A mix of clouds and sun with a (30%) chance of showers and a bit warmer Saturday, partly cloudy with a slight (20%) chance of showers Saturday night,
• Partly cloudy and a bit warmer Sunday, partly cloudy at night,
• Then mostly sunny and a bit warmer Monday and Tuesday, mostly clear Monday night.
• highs 58-70 lows 40-42. (seasonal averages high 64 low 42)

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Eugene-Springfield Pollen Count:

Grass………. Low (0)

Trees………. High (191)

Last Counted: 5/3/17

Data Courtesy of Oregon Allergy Associates.

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Forecast for Roseburg:

• Partly cloudy this AM, sunny and warmer this afternoon, mostly clear tonight,
• Partly cloudy with patchy AM fog and a slight (20%) chance of rain and drizzle, mostly cloudy and a bit cooler with a slight (20%) chance of thunderstorms Thursday afternoon and evening (under 0.10 in. of rain possible), a (30%) chance of showers late at night (under 0.10 in. of rain possible),
• Mostly cloudy and much cooler with showers likely (60%) Friday, then a (40%) chance of showers and colder Friday night.
• highs 86-59 lows 59-39.
• Mostly cloudy and a bit cooler with a (30%) chance of showers Saturday, a slight (20%) chance of showers Saturday night,
• Partly cloudy and a bit warmer Sunday and Sunday night,
• Then mostly sunny and a bit warmer Monday and Tuesday, mostly clear Monday night.
• highs 57-73 lows 40-42. (seasonal averages high 67 low 45)

 

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

• Partly cloudy with patchy AM coastal fog, sunny and warmer this afternoon, mostly clear this evening at the shore and partly cloudy with a slight (20%) chance of coastal rain and drizzle late tonight, patchy fog late tonight and Thursday AM, a slight (20%) chance of AM coastal rain and drizzle with a slight (20%) chance of coastal afternoon showers while a bit cooler with a slight (20%) chance of inland thunderstorms Thursday afternoon (under 0.10 in. of rain possible), a slight (20%) chance of coastal showers late at night while a slight (20%) chance of inland showers Thursday night (under 0.10 in. of rain possible),
• Mostly cloudy and a bit cooler with showers likely (60%) Friday, then colder with a (30%) chance of showers Friday night.
• highs 69-55 lows 55-42.
• Mostly cloudy with a slight (20%) chance of showers Saturday, partly cloudy with a slight (20%) chance of showers Saturday night,
• Partly cloudy and a bit warmer Sunday, mostly clear Sunday night,
• Then mostly sunny Monday and Tuesday, mostly clear Monday night.
• highs 55-60 lows near 45. (seasonal averages high 58 low 45)

 

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Forecast for the Cascades in Lane County:

• Mostly sunny this AM, partly cloudy with a slight (20%) chance of showers and warmer this afternoon, mostly clear with a slight (20%) chance of evening showers, just mostly clear late tonight,
• A slight (20%) chance of AM showers, a mix of clouds and sun and a bit warmer with a good (50%) chance of showers and a slight (20%) chance of thunderstorms Thursday afternoon, mostly cloudy with showers and a slight (20%) chance of thunderstorms in the evening, showers likely (70%) late at night,
• Mostly cloudy with showers and much cooler Friday, evening rain and snow showers likely (70%), then a good (50%) chance of rain and snow showers late Friday night.
• snow level above 8,000 ft. today through Thursday night, 8,000 ft. falling to 7,500 ft. Friday, then 3,500 ft. Friday night.
• highs 69-72 cooling to 48 Friday lows 43-29.
• A mix of clouds and sun with a (30%) chance of rain and snow showers and a bit cooler Saturday, partly cloudy with a (30%) chance of rain and snow showers at night,
• A mix of clouds and sun and a bit warmer with a slight (20%) chance of rain and snow showers Sunday, just partly cloudy Sunday night,
• Mostly sunny and a bit warmer Monday and Tuesday, mostly clear Monday night.
• snow level above 3,500 ft. Saturday, 4,5,00 ft. Saturday night, 4,000 ft. Sunday, free air freezing level 5,500 ft. Sunday night, 6,000 ft. Monday, 7,500 ft. Monday night, then 9,000 ft. Tuesday.
• highs 44-60 lows 30-32.

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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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