Here is my 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) has cleared the skies for a while. A frontal system approaching the West Coast will weaken but still bring us a chance of rain by tonight.  Friday shows a frontal system moving through the Pacific Northwest bringing more shower chances. By the end of the weekend another frontal system will be approaching from the northwest probably making landfall sometime late Sunday or Monday.

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Air Quality Index:

Eugene-Springfield: The Air Quality Index is 16 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 15 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 (6)

Trees………. Moderate (38)

Last Counted: 4/26/16

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:

• Cloudy with a (40%) chance of evening rain, occasional rain late tonight with a slight (20%) chance of thunderstorms (0.10 in. of rain possible, more in storms),
• Cloudy with AM showers likely (70%), a good (50%) chance of showers and a bit cooler Wednesday afternoon (under 0.10 in. of rain possible), a  (30%) chance of evening showers, a  slight (20%) chance of showers late Wednesday night (under 0.10 in. of rain possible),
• Cloudy Thursday AM, partly cloudy and a bit warmer in the afternoon and evening, partly cloudy at night,
• A mix of clouds and sun and a bit warmer Friday with a slight (20%) chance of showers in the afternoon, then partly cloudy with a slight (20%) chance of showers Friday night.
• lows 46-40 highs 60-63.
• A mix of clouds and sun and a bit warmer Saturday, partly cloudy at night,
• Mostly sunny and a bit warmer Sunday and Monday (a bit cooler), partly cloudy both nights.
• highs 67-80 cooling to 72 Tuesday lows 40-47. (seasonal averages high 63 low 41).

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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:

• Cloudy with a good (50%) chance of evening rain, rain late tonight (under 0.25 in. of rain possible),
• Cloudy with AM showers likely (70%) Wednesday, a bit warmer with a good (50%) chance of afternoon showers (0.15 in. of rain possible), mostly cloudy with a (30%) chance of showers Wednesday night (under 0.10 in. of rain possible),
• Mostly cloudy and a bit warmer Thursday with a slight (20%) chance of AM showers, just partly cloudy Thursday night,
• Mostly cloudy and a bit warmer Friday and Friday night.
• lows 44-46 cooling back to 44 Friday night highs 59-68.
• Partly cloudy and a bit warmer Saturday through Sunday, mostly clear Sunday night,
• Mostly sunny Monday, partly cloudy at night,
• Then partly cloudy with a slight (20%) chance of showers and cooler Tuesday.
• highs 70-82 cooling to 74 Tuesday lows 44-48. (seasonal averages high 65 low 44).

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

• Mostly cloudy with a good (50%) chance of evening rain, coastal showers with a slight (20%) chance of thunderstorms late tonight while inland rain late (0.20 in. of rain possible),
• Mostly cloudy with showers likely (60%) and a bit warmer Wednesday (0.15 in. of rain possible),  a slight (20%) chance of showers Wednesday night (under 0.10 in. of rain possible),
• Mostly cloudy and a bit warmer Thursday, partly cloudy at night,
• Just mostly cloudy and a bit warmer Friday and Friday night.
• lows 48-46 highs 56-60.
• Partly cloudy and a bit warmer Saturday and Saturday night,
• Partly cloudy and warmer Sunday, mostly clear at night,
• Mostly sunny and a bit warmer Monday, partly cloudy Monday night,
• Then partly cloudy with a slight (20%) chance of showers Tuesday.
• highs 62-72 cooling back to 62 Tuesday lows 47-52 cooling to 50 Monday night. (seasonal averages high 57 low 44)

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Forecast for the Cascades in Lane County:

• Cloudy with (40%) chance of rain and snow through late this evening, occasional rain and snow late tonight (0.10 in. if rain possible, 1 in. of snow possible),
• Cloudy and a bit cooler with rain and snow showers Wednesday (0.10 in. of rain possible, 1 in. of snow possible), a good (50%) chance of rain and snow showers at night (under 0.10 in. of rain possible),
• A slight (20%) chance of AM showers, a mix of clouds and sun  and a bit warmer Thursday afternoon,  just partly cloudy Thursday night,
• A mix of clouds and sun Friday with a slight (20%) chance of afternoon, then mostly cloudy with a slight (20%) chance of rain and snow showers Friday night.
• snow level 4,500 ft. tonight, 5,000 ft. Wednesday, 5,500 ft. Wednesday night and Thursday, then free air freezing level 7,500 ft. Thursday night, snow level 5,500 ft. Friday and Friday night.
• lows 34-28 highs 43-48.
• Just partly cloudy and a bit warmer Saturday and Saturday night,
• Then mostly sunny and a bit warmer Sunday and Monday (a bit cooler), mostly clear Sunday night, partly cloudy Monday night,
• Then a mix of clouds and sun with a slight (20%) chance of showers Tuesday.
• free air freezing level 7,500 ft. Saturday, 9,000 ft. Saturday night, 11,000 ft. Sunday through Monday night, then snow level above 8,000 ft. Tuesday.
• highs 56-70 lows 32-39.

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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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