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) will dry us out today. Friday shows a weak frontal system moving through the Pacific Northwest bringing just slight chances of showers. It looks like high pressure strengthens for more sunshine through the weekend.

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Air Quality Index:

Eugene-Springfield: The Air Quality Index is 15 in the Good category measuring Particulate Matter.

Oakridge: The Air Quality Index is 10 in the Good category measuring Particulate Matter.

Cottage Grove: The Air Quality Index is 13 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:

• A mix of clouds and sun and a bit warmer today, partly cloudy this evening, mostly cloudy late tonight,
• Mostly cloudy and a bit cooler Friday with a good (50%) chance of showers in the afternoon (under 0.10 in. of rain possible), a slight (20%) chance of evening showers (under 0.10 in. of rain possible), just partly cloudy Friday night,
• Partly cloudy and a bit warmer Saturday, then mostly clear at night.
• highs 63-58 warming to 66 Saturday lows 44-40.
• Mostly sunny and warmer Sunday and Monday, mostly clear Sunday night, partly cloudy Monday night,
• A mix of clouds and sun and cooler with a slight (20%) chance of showers Tuesday, partly cloudy with a slight (20%) chance of showers at night,
• Then mostly cloudy with a slight (20%) of showers Wednesday.
• highs 78-82 cooling to 72 Tuesday and Wednesday lows 44-47. (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:

• Partly cloudy this afternoon and evening, mostly cloudy late tonight,
• Mostly cloudy and a bit warmer with a (30%) chance of showers Friday afternoon (under 0.10 in. of rain possible), mostly cloudy with a slight (20%) chance of showers in the evening, partly cloudy with a slight (20%) chance of showers late Friday night,
• Partly cloudy in the AM, sunny Saturday afternoon, then clear Saturday night.
• highs 65-60 warming to 68 Saturday lows 45-43.
• Sunny Sunday, mostly clear at night,
• Partly cloudy and a bit warmer with a slight (20%) chance of AM showers Monday, a slight (20%) chance of afternoon thunderstorms, a slight (20%) chance of showers late Monday night,
• Mostly cloudy and a bit cooler with with a slight (20%) chance of thunderstorms Tuesday and at night,
• Cloudy and warmer with a slight (20%) chance of AM showers, then a slight (20%) chance of thunderstorms Wednesday afternoon.
• highs 82-75 lows 48-50. (seasonal averages high 66 low 44).

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

• Partly cloudy and a bit cooler this afternoon and tonight,
• Mostly cloudy with a slight (20%) chance of showers Friday afternoon (under 0.10 in. of rain possible), mostly cloudy with a slight (20%) chance of showers in the evening, partly cloudy late Friday night and
• Saturday AM, sunny and a bit warmer in the afternoon, then mostly clear at night.
• highs 57-60 lows near 46.
• Sunny and warmer Sunday, clear Sunday night,
• Partly cloudy and a bit cooler Monday, mostly cloudy Monday night,
• Mostly cloudy and cooler with a slight (20%) chance of thunderstorms Tuesday and Tuesday night,
• A slight (20%) chance of showers Wednesday AM, then a slight (20%) chance of thunderstorms Wednesday afternoon.
• highs 74-60 lows 50-52. (seasonal averages high 57 low 44)

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Forecast for the Cascades in Lane County:

• A mix of clouds and sun  and a bit warmer this afternoon, partly cloudy with a slight (20%) chance of showers this evening, mostly cloudy late tonight,
• Mostly cloudy Friday with a slight (20%) chance of AM rain, rain and snow showers likely (60%) in the afternoon, a good (50%) chance of rain and snow showers at night,
• Partly cloudy Saturday AM, mostly sunny and a bit warmer in the afternoon, then mostly clear Saturday night.
• snow level 4,500 ft. rising to 6,000 ft. this afternoon, 6,000 ft. tonight, 5,000 ft. Friday and Friday night, 5,500 ft. rising to 7,5600 ft. Saturday afternoon, then free air freezing level 9,000 ft. Saturday night.
• highs 48-40 warming to 55 Saturday lows 32-30 warming back to 32 Saturday night.
• Mostly sunny and a bit warmer Sunday and Monday, mostly clear Sunday night, partly cloudy Monday night,
• Partly cloudy and much cooler with a slight (20%) chance of showers Tuesday and Tuesday night,
• Then a mix of clouds and sun with a slight (20%) chance of showers Wednesday.
• free air freezing level 10,000 ft. Sunday, 11,000 ft. Sunday night, 10,000 ft. Monday, 11,000 ft. Monday night, then snow level above 8,000 ft. Tuesday through Wednesday.
• highs 67-72 cooling to 60 Wednesday lows near 38.

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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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