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 a (20%) chance of evening sprinkles, just partly cloudy with patchy fog late tonight and Sunday AM, mostly sunny and a bit warmer in the afternoon, clear in the evening, partly cloudy late Sunday night,
• Then mostly sunny and a bit warmer Monday and Tuesday, mostly clear both nights,
• lows 36-46 highs 63-73.
• 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 73-57 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 late tonight and Sunday AM, sunny and a bit warmer in the afternoon, mostly clear Sunday night,
• Sunny and a bit warmer Monday, mostly clear at night,
• Mostly sunny and a bit warmer Tuesday, then mostly clear Tuesday night.
• lows 38-48 highs 66-76.
• 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, then mostly cloudy and a bit cooler with showers likely (60%) Friday night and Saturday.
• highs 75-60 lows 48-50 cooling to 44 Friday night. (seasonal averages high 68 low 46)

 

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

• Just partly cloudy tonight,
• Sunny and a bit warmer Sunday, mostly clear in the evening, partly cloudy late at night and Monday AM, mostly clear Monday night,
• Sunny and a bit warmer Tuesday, mostly clear in the evening, then partly cloudy late at night.
• lows 45-47 highs 56-60.
• 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 cloudy with a slight (20%) chance of evening sprinkles, just partly cloudy late tonight,
• Mostly sunny and a bit warmer Sunday, mostly clear at night,
• Sunny and a bit warmer Monday, mostly clear Monday night,
• Mostly sunny and a bit warmer Tuesday, then partly cloudy Tuesday night.
• snow level 4,000 ft. tonight, free air freezing level 4,500 ft. rising to 7,000 ft. Sunday afternoon, 10,000 ft. Sunday night through Monday night, 11,000 ft. Tuesday, then 12,000 ft. Tuesday night.
• lows 26-35 highs 54-63.
• 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, rain likely (60%) 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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