Here is my new weekly weather quiz question. What is a “Roll Cloud?”  Please remember to post your answer as a comment by clicking on “no comments /comments” in the upper right hand portion of this page under the caption, then add your comment. The first person to post the correct answer will win a week of free personalized weather forecasts tailored to your needs. The answer has to be a comment to win. An email answer will not count. Good luck.

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Another upper level high pressure ridge (Shaded “Arch” shape with blue arrows) will move in clearing the skies and ending the chance showers and possible thunderstorms for a while. By the middle of the week a frontal system approaches the West Coast. By Friday it looks like a frontal system will be moving through the Pacific Northwest bringing more shower chances. The end of the weekend another frontal system will be approaching from the northwest probably making landfall sometime Monday.

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Air Quality Index:

Eugene-Springfield: The Air Quality Index is 22 in the Good category measuring Particulate Matter.

Oakridge: The Air Quality Index is 17 in the Good category measuring Particulate Matter.

Cottage Grove: The Air Quality Index is 17 in the Good category measuring Particulate Matter.

Data courtesy of Lane Regional Air Protection Agency (LRAPA).

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Advisories: None At This Time.

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Eugene-Springfield Pollen Count:

Grass………. Moderate (11)

Trees………. Very High (529)

Last Counted: 4/21/16

Data Courtesy of Oregon Allergy Associates.

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Forecast for the Southern and lower Mid Willamette Valley including Eugene-Springfield and Albany-Corvallis:

• A mix of clouds and sun and a bit warmer with a (30%) chance of scattered showers today (under 0.10 in. of rain possible), partly cloudy with a slight (20%) chance of evening showers, mostly cloudy with patchy fog late tonight and Tuesday AM, a mix of clouds and sun and a bit warmer Tuesday afternoon, becoming mostly cloudy with a good (50%) chance of rain Tuesday night (0.10 in. of rain possible),
• Cloudy and a bit cooler with a good (50%) chance of showers Wednesday, mostly cloudy with a slight (20%) chance of evening showers, then just mostly cloudy late at night.
• highs 57-62 cooling to 60 Wednesday lows 36-44.
• A mix of clouds and sun and a bit warmer Thursday, partly cloudy at night,
• A mix of clouds and sun with a slight (20%) chance of showers Friday, then partly cloudy Friday night through Sunday.
• highs 65-68 lows near 44. (seasonal averages high 63 low 40).

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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.

Advisory Courtesy of Lane Regional Air Protection Agency (LRAPA).

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Forecast for Roseburg:

• Partly cloudy with a slight (20%) chance of showers and a bit warmer this afternoon (under 0.10 in. of rain possible, snow level 2,500 ft. rising to 3,500 ft.), partly cloudy this evening, mostly cloudy with patchy fog and possible frost late tonight and very early Tuesday AM, partly cloudy with patchy AM fog, increasing clouds to mostly cloudy and a bit warmer Tuesday afternoon, rain likely (60%) at night (under 0.10 in. of rain possible),
• Cloudy with a good (50%) chance of showers Wednesday, then mostly cloudy with a slight (20%) chance of showers Wednesday night.
• highs 59-62 lows 37-45.
• Mostly cloudy and a bit warmer Thursday and Friday, partly cloudy both nights,
• Mostly cloudy and a bit warmer Saturday and Saturday night,
• Mostly cloudy Sunday AM, then becoming mostly sunny and a bit warmer in the afternoon.
• highs 67-74 lows 47-42. (seasonal averages high 65 low 43).

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

• Partly cloudy with a slight (20%) chance of isolated coastal showers this afternoon while mostly cloudy and a bit warmer with a slight (20%) chance of inland isolated showers today (under 0.10 in. of rain possible), just partly cloudy tonight and Tuesday AM, mostly cloudy in the afternoon, cloudy with a good (50%) chance of evening coastal showers and rain late at night while inland rain likely (60%) Tuesday night (under 0.10 in. of rain possible),
• Mostly cloudy with a good (50%) chance of showers and a bit warmer Wednesday, then mostly cloudy Wednesday night.
• lows 43-40 warming to 48 Wednesday night highs 56-59.
• Mostly cloudy and a bit warmer Thursday and Friday, partly cloudy both nights,
• Mostly cloudy and a bit warmer Saturday through Sunday AM, then becoming mostly cloudy and a bit warmer Sunday afternoon.
• highs 62-66 lows near 48. (seasonal averages high 56 low 44)

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Forecast for the Cascades in Lane County:

• Mostly cloudy with a good (50%) chance of scattered rain and snow showers and a bit warmer today (under 0.10 in. of rain possible), partly cloudy with a slight (20%) chance of rain and snow showers this evening, just at partly cloudy tonight and Tuesday, mostly cloudy with a slight (20%) chance of rain and snow showers in the evening, rain and snow likely (70%) late Tuesday night,
• Cloudy and a bit cooler with rain and snow showers likely (60%) Wednesday, then mostly cloudy with a a (30%) chance of rain and snow showers at night.
• snow level 3,000 ft.today tonight, free air freezing level 4,000 ft. rising to 5,500 ft. Tuesday afternoon, snow level 4,000 ft. Tuesday night, 4,500 ft. Wednesday, then 5,500 ft. Wednesday night.
• highs 42-48 cooling to 45 Wednesday lows 25-32.
• A mix of clouds and sun and a bit warmer Thursday and Friday, partly cloudy Thursday night, mostly cloudy with a slight (20%) chance of showers Friday night,
• Then partly cloudy and a bit warmer Saturday through Sunday.
• free air freezing level 6,000 ft. Thursday, 8,000 ft. Thursday night and Friday, snow level 6.000 ft. Friday night, free air freezing level 7,000 ft. Saturday, 7,500 ft. Saturday night, then 9,000 ft. Sunday.
• highs 49-58 cooling to 55 Sunday lows near 33.

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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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