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 Low Pressure Trough (Shaded “U” shape with blue arrows) will keep us in an onshore airflow that results in precipitation.. The graphics for days 3-7 show the next frontal system that will push into our area Tuesday and Thursday of next week.

________________

 

Air Quality Index:

Eugene-Springfield: The Air Quality Index is 11 in the Good category measuring Particulate Matter.

Oakridge: The Air Quality Index is 9 in the Good category measuring Particulate Matter.

Cottage Grove: The Air Quality Index is 2 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:

• Mostly cloudy with a good (50%) chance of scattered evening showers, a slight (20%) chance of showers late tonight (under 0.10 in. of rain possible),
• Partly cloudy with a slight (20%) chance of showers and a bit warmer Saturday (under 0.10 in. of rain possible), partly cloudy Saturday night and Sunday AM, mostly sunny and a bit warmer in the afternoon, partly cloudy Sunday night,
• Partly cloudy in the AM, mostly sunny and a bit warmer Monday, then mostly clear at night.
• lows 38-35 warming back to 42 Monday night highs 58-68.
• Partly cloudy and a bit warmer Tuesday and at night,
• Mostly cloudy with a slight (20%) chance of showers and a bit cooler Wednesday, then mostly cloudy with a good (50%) chance of showers and a bit cooler Wednesday night through Friday.
• highs 72-58 lows 40-44. (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 with a slight (20%) chance of isolated showers tonight (under 0.10 in. of rain possible, snow level 3,500 ft. falling to 3,000 ft. late tonight),
• Partly cloudy with a slight (20%) chance of showers Saturday (under 0.10 in. of rain possible, afternoon snow level 3,500 ft.), mostly cloudy in the evening, partly cloudy late Saturday night and Sunday AM, sunny and a bit warmer in the afternoon, mostly clear Sunday night,
• Mostly sunny and a bit warmer Monday, then mostly clear at night.
• lows 42-39 warming to 45 Monday night highs 58-72.
• Mostly sunny and a bit warmer Tuesday, increasing clouds to mostly cloudy Tuesday night,
• Mostly cloudy with a (30%) chance of showers and a bit cooler Wednesday, a good (50%) chance of showers Wednesday night,
• Mostly cloudy and a bit cooler with a good (50%) chance of showers Thursday, then a (40%) chance of showers Thursday night and Friday.
• highs 76-62 lows 48-50 cooling to 45 Thursday night. (seasonal averages high 68 low 45)

 

_____________________

 

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

• Mostly cloudy and colder with a slight (20%) chance of isolated showers tonight (under 0.10 in. of rain possible),
• Partly cloudy with a slight (20%) chance of AM coastal showers and partly cloudy in the afternoon while partly cloudy with a slight (20%) chance of inland showers Saturday (under 0.10 in. of rain possible),  just partly cloudy Saturday night,
• Sunny and a bit warmer Sunday, partly cloudy at night and Monday, then mostly clear Monday night.
• lows 44-47 highs 56-60.
• Partly cloudy Tuesday, mostly cloudy at night,
• Mostly cloudy with a slight (20%) chance of showers and a bit cooler Wednesday, showers likely (70%) Wednesday night,
• Cloudy with a good (50%) chance of showers Thursday, then mostly cloudy with a (40%) chance of showers Thursday night and Friday.
• highs 60-57 lows 45-50 cooling to 47 Thursday night. (seasonal averages high 58 low 45)

 

________________

Forecast for the Cascades in Lane County:

• Cloudy with evening showers, a good (50%) chance of rain and snow showers and colder late tonight (0.10 in. of rain possible, 1 in. of snow possible),
• A mix of clouds and sun and a bit cooler with a (30%) chance of showers Saturday, mostly cloudy with a slight (20%) chance of evening rain and snow showers, just mostly cloudy late at night,
• Partly cloudy and a bit warmer Sunday, mostly clear Sunday night,
• Mostly sunny and a bit warmer Monday, mostly clear at night.
• snow level 4,000 ft. tonight, 3,000 ft. Saturday, 4,000 ft. Saturday night free air freezing level 5,500 ft. Sunday, 8,000 ft. Sunday night, 9,000 ft. Monday, then 10,000 ft. Monday night.
• lows 27-25 warming to 32 Monday night highs 42-57.
• Partly cloudy and a bit warmer Tuesday and Tuesday night,
• Mostly cloudy and a bit cooler with a slight (20%) chance of showers Wednesday, showers likely (70%) Wednesday night and Thursday (a bit cooler), cloudy with a good (50%) chance of rain and snow showers Thursday night,
• Then rain and snow showers likely (70%) and a bit cooler Friday.
• free air freezing level 10,000 ft. Tuesday and Tuesday night, snow level 8,000 ft. Wednesday, 7,500 ft. Wednesday night, 6,000 ft. Thursday, 5,000 ft. Thursday night, then 4,000 ft. Friday.
• highs 63-42 lows 35-32.

________________

**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.

________________