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) is moving through and out. An Upper Level High Pressure Ridge (Shaded “Arch” shape with blue arrows) will take over returning the clearing skies and warming us up again. The graphics for days 1-3 show the next front that will move in Tuesday. The graphics for days 3-7 show that frontal system pushing through  Tuesday night and Wednesday.

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Air Quality Index:

Eugene-Springfield: The Air Quality Index is 10 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 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 with patchy fog this AM, mostly sunny and a bit warmer this afternoon, clear this evening, partly cloudy late tonight,
• Then mostly sunny and a bit warmer Monday and Tuesday, mostly clear Monday night, partly cloudy Tuesday night.
• highs 63-73 lows 39-46.
• A mix of clouds and sun and a bit warmer Wednesday, increasing clouds to mostly cloudy with a good (50%) chance of showers Wednesday night,
• Rain likely (70%) and a bit cooler Thursday, mostly cloudy with a good (50%) chance of showers at night,
• Mostly cloudy with showers likely (60%) Friday, then mostly cloudy with a good (50%) chance of showers Friday night and Saturday.
• highs 69-57 lows 52-44. (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 areas of frost this AM, sunny and a bit warmer this afternoon, mostly clear tonight,
• Sunny and a bit warmer Monday, mostly clear at night,
• Mostly sunny and a bit warmer Tuesday, then mostly clear Tuesday night.
• highs 66-76 lows 42-48.
• Mostly cloudy with a slight (20%) chance of showers and a bit cooler Wednesday, showers likely (70%) Wednesday night,
• Mostly cloudy and a bit cooler with rain likely (70%) Thursday, showers likely (70%) at night,
• Mostly cloudy and a bit cooler with a good (50%) chance of showers Friday and Friday night,
• Then mostly cloudy with showers likely (60%) Saturday.
• highs 75-60 lows 50-44. (seasonal averages high 68 low 46)

 

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

• Sunny and a bit warmer today, mostly clear this evening, partly cloudy late tonight and Monday AM, sunny in the afternoon, mostly clear Monday night,
• Sunny and a bit warmer Tuesday, mostly clear in the evening, then partly cloudy late at night.
• highs 56-60 lows 45-47.
• Mostly cloudy with a slight (20%) chance of showers and a bit cooler Wednesday, showers Wednesday night,
• Mostly cloudy with rain likely (70%) Thursday, showers at night,
• Then showers likely (70%) Friday through Saturday.
• highs 60-56 lows 49-46. (seasonal averages high 58 low 46)

 

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Forecast for the Cascades in Lane County:

• Mostly sunny and a bit warmer today, mostly clear tonight,
• Sunny and a bit warmer Monday, mostly clear Monday night,
• Mostly sunny and a bit warmer Tuesday, then partly cloudy Tuesday night.
• free air freezing level 4,500 ft. rising to 7,000 ft. this afternoon, 10,000 ft. tonight through Monday night, 11,000 ft. Tuesday, then 12,000 ft. Tuesday night.
• highs 54-63 lows 29-35.
• Partly cloudy and a bit cooler with a slight (20%) chance of showers Wednesday, mostly cloudy with a good (50%) chance of showers Wednesday night,
• Rain likely (70%) and a bit cooler Thursday, cloudy with a good (50%) of showers at night,
• Rain and snow showers likely (70%) and a bit cooler Friday, a good (50%) chance of rain and snow showers Friday night,
• Cloudy with a good (50%) chance of AM rain and snow showers, then rain and snow showers likely (70%) and a bit cooler Saturday afternoon.
• snow level above 8,000 ft. Wednesday and Wednesday night, 6,500 ft. Thursday, 5,000 ft. Thursday night, 4,000 ft. Friday, 4,500 Friday night, then 3,500 ft. Saturday.
• highs 63-42 lows 36-32.

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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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