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.

________________

 

An Upper level High Pressure Ridge (Shaded “Arch” shape with blue arrows) took over and will keep quite warm through today. The graphics for days 1-3 shows the cold front that will drop our temperatures Friday. The graphics for days 3-7 show another frontal system that will push into our area between next Tuesday night and Wednesday.

________________

 

Air Quality Index:

Eugene-Springfield: The Air Quality Index is 27 in the Good category measuring Particulate Matter.

Oakridge: The Air Quality Index is 15 in the Good category measuring Particulate Matter.

Cottage Grove: The Air Quality Index is 132 in the Good category measuring Particulate Matter.

Data courtesy of Lane Regional Air Protection Agency (LRAPA)

________________

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)

________________

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.

________________

Forecast for the Southern and lower Mid Willamette Valley including Eugene-Springfield and Albany-Corvallis:

• A mix of clouds and sun and a bit cooler with a good (50%) chance of showers and thunderstorms this afternoon (under 0.10 in. of rain possible, more in storms, small hail possible), showers likely (70%) with a slight (20%) chance of thunderstorms this evening, mostly cloudy with showers likely (70%) late tonight (0.10 in. of rain possible, more in storms, small hail possible),
• Mostly cloudy and cooler with showers Friday (0.10 in. of rain possible), a good (50%) chance of evening showers, partly cloudy and colder with a good (50%) chance of showers at night (under 0.10 in. of rain possible),
• A mix of clouds and sun with a (30%) chance of showers and a bit warmer Saturday, then partly cloudy Saturday night.
• highs 75-56 warming to 58 Saturday lows 50-36.
• A mix of clouds and sun and a bit warmer Sunday, partly cloudy Sunday night through Tuesday, partly cloudy with a slight (20%) chance of showers Tuesday night,
• Partly cloudy and a bit warmer Tuesday, partly cloudy with a slight (20%) chance of showers at night,
• Then a mix of clouds and sun with a (40%) chance of showers and a bit cooler Wednesday.
• highs 63-67 cooling back to 63 Wednesday lows 39-48. (seasonal averages high 65 low 42)

_____

 

Eugene-Springfield Pollen Count:

Grass………. Low (0)

Trees………. High (191)

Last Counted: 5/3/17

Data Courtesy of Oregon Allergy Associates.

_________________

 

Forecast for Roseburg:

• Mostly cloudy and a bit cooler with a slight (20%) chance of showers and thunderstorms this afternoon and evening (under 0.10 in. of rain possible), a (30%) chance of showers late tonight (under 0.10 in. of rain possible),
• Mostly cloudy with AM showers likely (70%), much cooler with showers likely (60%) Friday afternoon (0.10 in. of rain possible), mostly cloudy with a good (50%) chance of showers and colder Friday night (under 0.10 in. of rain possible, snow level 3,500 ft. falling to 3,000 ft. at night),
• Mostly cloudy with a slight (20%) chance of AM rain and snow showers, just partly cloudy and a bit warmer Saturday afternoon, then just mostly cloudy Saturday night.
• highs 78-57 warming to 60 Saturday lows 52-38.
• Partly cloudy and a bit warmer Sunday, just partly cloudy and a bit warmer Sunday night and Monday, mostly clear Monday night,
• Partly cloudy and a bit warmer Tuesday, then mostly cloudy with a (30%) chance of showers Tuesday night and Wednesday (a bit cooler).
• highs 62-72 cooling to 65 Wednesday lows 45-42 warming to 49 Tuesday night. (seasonal averages high 67 low 45)

 

_____________________

 

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

• Mostly cloudy and a bit cooler with a slight (20%) chance of coastal showers this afternoon while a slight (20%) chance of inland thunderstorms this afternoon (under 0.10 in. of rain possible), a (30%) chance of showers tonight (under 0.10 in. of rain possible),
• Mostly cloudy with AM showers likely (70%), a bit cooler with a (40%) chance of showers Friday (0.10 in. of rain possible), colder with a (30%) chance of showers Friday night,
• Mostly cloudy with a slight (20%) chance of AM showers Saturday, then partly cloudy in the afternoon and at night.
• highs 62-55 lows 50-42.
• Partly cloudy Sunday through Tuesday (a bit warmer), then mostly cloudy with a (30%) chance of showers Tuesday night and Wednesday.
• highs 58-60 lows 46-48. (seasonal averages high 58 low 45)

 

________________

Forecast for the Cascades in Lane County:

• A  mix of clouds and sun and a bit cooler with a showers and thunderstorms likely this afternoon (0.10 in. of rain possible, more in storms), showers and a slight (20%) chance of thunderstorms this evening, showers likely (70%) and colder with a slight (20%) chance of thunderstorms late tonight (0.50 in. of rain possible, more in storms, evening small hail possible),
• Mostly cloudy with AM showers, rain and snow showers likely (70%) and much cooler Friday afternoon, rain and snow showers likely (60%) and colder Friday night,
• Mostly cloudy with a (40%) chance of AM rain and snow showers, a bit cooler with a slight (20%) chance of rain and snow showers Saturday, then mostly cloudy with a (30%) chance of rain and snow showers at night.
• snow level above 8,000 ft. today and tonight, above 7,000 ft. falling to 5,000 ft. Friday afternoon, 4,000 ft. Friday night, 3,000 ft. Saturday, then 4,000 ft. Saturday night.
• highs 69-42 lows 39-26 warming to 28 Saturday 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 and a bit warmer Sunday night through Tuesday, mostly cloudy with a (40%) chance of showers Tuesday night,
• Then a mix of clouds and sun bit cooler with a (40%) chance of showers Wednesday.
• free air freezing level 5,000 ft. Sunday, 8,000 ft. Sunday night and Monday, 10,000 ft. Monday night and Tuesday, snow level 8,000 ft. Tuesday night, then 7,000 ft. Wednesday.
• highs 52-59 cooling to 50 Wednesday lows 30-37.

________________

**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.

________________

Get your local Eugene-Springfield and Lane County news on-line at eugenedailynews.com.

________________