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) cleared the skies for a while. A frontal system will weaken but still bring us a chance of rain today and 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 25 in the Good category measuring Particulate Matter.

Oakridge: The Air Quality Index is 16 in the Good category measuring Particulate Matter.

Cottage Grove: The Air Quality Index is 18 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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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 the Southern and lower Mid Willamette Valley including Eugene-Springfield and Albany-Corvallis:

• Cloudy with AM showers likely (70%), mostly cloudy with a good (50%) chance of showers this afternoon (under 0.10 in. of rain possible), a  slight (20%) chance of evening showers, partly cloudy late tonight (under 0.10 in. of rain possible),
• Mostly cloudy Thursday AM, partly cloudy and a bit warmer in the afternoon and at night,
• A mix of clouds and sun and a bit warmer Friday with a slight (20%) chance of showers in the afternoon, partly cloudy with a slight (20%) chance of evening showers, then just partly cloudy Friday night.
• highs 60-63 lows 44-40.
• A mix of clouds and sun and a bit warmer Saturday, partly cloudy at night,
• Mostly sunny and a bit warmer Sunday and Monday, partly cloudy both nights,
• Then partly cloudy and cooler with a slight (20%) chance of showers Tuesday.
• highs 67-80 cooling to 72 Tuesday lows 40-47. (seasonal averages high 63 low 41).

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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 Roseburg:

• Cloudy with AM showers likely (70%), a bit warmer with a good (50%) chance of afternoon showers (0.15 in. of rain possible), mostly cloudy with a slight (20%) chance of evening showers, partly cloudy with a slight (20%) chance of showers late tonight (under 0.10 in. of rain possible),
• Mostly cloudy early, partly cloudy and a bit warmer Thursday afternoon and evening, just mostly cloudy late Thursday night,
• Mostly cloudy and a bit warmer with a slight (20%) chance of showers Friday afternoon, then partly cloudy late Friday night.
• highs 59-68 lows near 45.
• Partly cloudy in the AM, mostly sunny and a bit warmer Saturday afternoon and Sunday, mostly clear at 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 AM coastal showers likely (60%) and a(40%) chance of showers  this afternoon while inland showers likely (60%) and a bit warmer today (0.15 in. of rain possible),  a (30%) chance of coastal showers tonight while (under 0.10 in. of rain possible),
• Mostly cloudy with a slight (20%) chance of AM coastal showers, partly cloudy and a bit warmer Thursday, partly cloudy at night,
• Mostly cloudy and a bit warmer with a slight (20%) chance of showers Friday afternoon, mostly cloudy in the evening then partly cloudy Friday night.
• highs 56-60 lows near 46.
• Mostly sunny and a bit warmer Saturday and Sunday, mostly clear at night,
• Mostly sunny and a bit warmer Monday, partly cloudy Monday night,
• Then mostly 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 and a bit cooler with rain and snow showers likely (70%) today (0.10 in. of rain possible, 1 in. of snow possible), a good (50%) chance of rain and snow showers tonight (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 showers, then mostly cloudy with a slight (20%) chance of rain and snow showers Friday night.
• snow level 5,000 ft. today through Thursday, free air freezing level 8,000 ft. Thursday night, snow level 6,500 ft. Friday, then 5,500 ft. Friday night.
• highs 43-50 lows 30-28.
• Just partly cloudy and a bit warmer Saturday and Saturday night,
• Then mostly sunny and a bit warmer Sunday and Monday, mostly clear Sunday night, partly cloudy Monday night,
• Then a mix of clouds and sun and much cooler with a slight (20%) chance of showers Tuesday.
• free air freezing level 5,000 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 cooling back to 56 Tuesday 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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