Here is my weekly weather quiz question for the last time. What is  an“ Ashfall Advisory?”  Here is the correct answer. An Ashfall Advisory is an advisory issued for conditions associated with airborne ash plume resulting in ongoing deposition at the surface. Ashfall may originate directly from a volcanic eruption, or indirectly by wind suspending the ash. I’ll have a new weekly weather quiz question for you starting 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) returns the clouds and chances for rain tonight into next week. The graphic for days 1-3 shows the frontal system that’s returning the rain to the Pacific Northwest. The graphic for days 3-7 shows more frontal systems to bring back moisture Wednesday and again Saturday. For mountain snow conditions at the local ski areas check out their websites or give them a call.

 

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Air Quality Index:

Eugene-Springfield: The Air Quality Index is 28 in the Good category measuring Particulate Matter.

Oakridge: The Air Quality Index is 19 in the Good category measuring Particulate Matter.

Cottage Grove: The Air Quality Index is 26 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 with evening rain likely (70%) and a slight (20%) chance of thunderstorms, a good (50%) chance of showers late tonight (0.10 in. of rain possible),
• Mostly cloudy with a good (50%) chance of AM rain, rain likely (70%) and a bit cooler Monday afternoon (0.25 in. of rain possible), rain at night (0.25 in. of rain possible),
• AM showers likely (70%), mostly cloudy and a bit warmer with a good (50%) chance of showers Tuesday afternoon, just partly cloudy Tuesday night and Wednesday AM, mostly cloudy and a bit warmer with a slight (20%) chance of rain in the afternoon, then rain likely (70%) Wednesday night.
• lows 43-46 cooling to 39 Tuesday night warming to 45 Wednesday night highs 60-64.
• Mostly cloudy and a bit cooler with showers likely (70%) and a slight (20%) chance of thunderstorms Thursday, just partly cloudy Thursday night through Friday night,
• A mix of clouds and sun and a bit cooler with a slight (20%) chance of rain Saturday, partly cloudy at night,
• Then a mix of clouds and sun and a bit cooler Sunday.
• highs 59-70 cooling to 62 Sunday lows 39-46. (seasonal averages high 61 low 40)

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Eugene-Springfield Pollen Count:

Grass………. Low (2)

Trees………. Moderate (15)

Last Counted: 4/12/17

Data Courtesy of Oregon Allergy Associates.

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Forecast for Roseburg:

• Cloudy with evening showers likely (60%)  and a slight (20%) chance of thunderstorms, a good (50%) chance of showers tonight (0.10 in. of rain possible) and Monday AM, rain likely (70%) and a bit cooler in the afternoon and evening (under 0.10 in. of rain possible), rain late at night (0.25 in. of rain possible),
• Mostly cloudy and a bit warmer with a (30%) chance of showers Tuesday, becoming mostly clear at night,
• Mostly cloudy and a bit warmer with showers likely (70%) Wednesday and in the evening, then just mostly cloudy late Wednesday night.
• lows 47-44 warming back to 47 Wednesday night highs 60-63.
• Mostly cloudy and a bit cooler with showers likely (70%) Thursday, just mostly cloudy Thursday night,
• Partly cloudy and warmer Friday and at night,
• Mostly cloudy with a slight (20%) chance of showers and a bit cooler Saturday, partly cloudy Saturday night,
• Then sunny Sunday.
• highs 60-70 cooling to 68 Saturday and Sunday lows 45-40 warming back to 45 Friday night. (seasonal averages high 62 low 42)

 

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

• Cloudy with evening showers  and a slight (20%) chance of thunderstorms, a (30%) chance of showers  late tonight (under 0.10 in. of rain possible),
• A good (50%) chance of AM showers, rain Monday afternoon (0.10 in. of rain possible), evening rain likely (70%), rain late at night (0.25 in. of rain possible),
• Mostly cloudy and a bit warmer with a (30%) chance of showers Tuesday (0.10 in. of rain possible), mostly clear in the evening at the shore and partly cloudy with a slight (20%) chance of rain late at night while mostly clear inland Tuesday night,
• Mostly cloudy with a (40%) chance of rain Wednesday, evening rain likely (70%), then rain late at night.
• lows 48-50 cooling to 47 Tuesday night and Wednesday night highs near 58.
• Mostly cloudy and a bit cooler with showers likely (70%) Thursday, just partly cloudy Thursday night through Friday night (a bit warmer Friday),
• Mostly cloudy with a slight (20%) chance of showers and a bit cooler Saturday, partly cloudy at night,
• Then sunny and a bit warmer Sunday.
• highs 58-63 cooling back to 58 Saturday warming to 64 Sunday lows 43-48 cooling back to 43 Saturday night. (seasonal averages high 55 low 43)

 

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Forecast for the Cascades in Lane County:

• Cloudy with evening rain and a slight (20%) chance of thunderstorms, a good (50%) chance of rain and snow showers late tonight (0.25 in. of rain possible, 1 in. of snow possible),
• Mostly cloudy with a (40%) chance of AM rain and snow, rain and snow and a bit cooler Monday afternoon (0.25 in. of rain possible, now snow accumulation expected), rain at night (0.25 in. of rain possible),
• AM rain and snow showers, mostly cloudy with a good (50%) chance of rain and snow showers Tuesday afternoon, just partly cloudy Tuesday night,
• A mix of clouds and sun and a bit warmer with a slight (20%) chance of rain Wednesday afternoon, then rain and snow likely (70%) at night.
• snow level 6,000 ft. falling to 5,000 ft. tonight and Monday, 6,000 ft. Monday night, 5,500 ft. Tuesday, free air freezing level 6,500 ft. Tuesday night, snow level 5,000 ft. Wednesday, then 5,500 ft. Wednesday night.
• lows 30-33 cooling to 28 Tuesday night warming to 32 Wednesday night highs 46-49.
• Mostly cloudy with rain and snow showers likely (70%) and a bit cooler Thursday, mostly cloudy with a slight (20%) chance of rain and snow showers Thursday night,
• Mostly sunny and a bit warmer Friday, partly cloudy at night,
• Partly cloudy with a slight (20%) chance of rain Saturday, mostly cloudy with a slight (20%) chance of showers Saturday night,
• Partly cloudy with a slight (20%) chance of rain Saturday, mostly cloudy with a slight (20%) chance of showers Saturday night,
• Then partly cloudy and a bit warmer Sunday.
• snow level 4,500 ft. Thursday, 5,000 ft. Thursday night, free air freezing level 7,000 ft. Friday, 9,000 ft. Friday night, snow level 7,500 ft. Saturday, 6,500 ft. at night, then free air freezing level 7,500 ft. Sunday.
• highs 42-50 cooling to 48 Saturday lows 28-34 cooling to 32 Saturday night.

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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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