Here is my weekly weather quiz question for the last time. What is the “ Automated Surface Observing System (ASOS)?” Here is the correct answer. Automated Surface Observing System, the ASOS program is a joint effort of the National Weather Service (NWS), the Federal Aviation Administration (FAA), and the Department of Defense (DOD). Completed in the mid-1990s, the ASOS systems serve as the nation’s primary surface weather observing network. ASOS is designed to support weather forecast activities and aviation operations and, at the same time, support the needs of the meteorological, hydrological, and climatological research communities. 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 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.

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Air Quality Index:

Eugene-Springfield: The Air Quality Index is 12 in the Good category measuring Particulate Matter.

Oakridge: The Air Quality Index is 16 in the Good category measuring Particulate Matter.

Cottage Grove: The Air Quality Index is 3 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:

• Mostly cloudy this AM, a mix of clouds and sun and a bit warmer this afternoon, partly cloudy tonight and Sunday AM, partly cloudy Sunday night,
• Partly cloudy in the AM, mostly sunny and a bit warmer Monday afternoon, then mostly clear at night.
• highs 58-68 lows 35-42.
• 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 a good (50%) chance of showers Wednesday night through Friday.
• highs 72-58 lows 47-44. (seasonal averages high 65 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 with a slight (20%) chance of showers today (under 0.10 in. of rain possible, afternoon snow level 3,500 ft.), mostly cloudy this evening, partly cloudy late tonight 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.
• highs 58-72 lows 39-45.
• 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 46)

 

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

• Partly cloudy with a slight (20%) chance of AM coastal showers and partly cloudy this afternoon while partly cloudy with a slight (20%) chance of inland showers today (under 0.10 in. of rain possible),  just partly cloudy tonight,
• Sunny and a bit warmer Sunday, partly cloudy at night and Monday, then mostly clear Monday night.
• highs 56-60 lows 44-47.
• 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 46)

 

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Forecast for the Cascades in Lane County:

• AM clouds, a mix of clouds and sun and a bit cooler with a slight (20%) chance of showers this afternoon, mostly cloudy with a slight (20%) chance of evening showers, just mostly cloudy late tonight,
• Partly cloudy and a bit warmer Sunday, mostly clear Sunday night,
• Mostly sunny and a bit warmer Monday, mostly clear at night.
• snow level 3,500 ft. today, 4,000 ft. tonight, free air freezing level 5,500 ft. Sunday, 8,000 ft. Sunday night, 9,000 ft. Monday, then 10,000 ft. Monday night.
• highs 42-57 lows 25-32.
• 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.

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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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