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) dried us out Thursday. Today shows a weak frontal system moving through the Pacific Northwest bringing more chances of showers. It looks like high pressure strengthens again for more sunshine for the weekend through early next. Tuesday another frontal system brings back at least a slight chance of showers at night. Looking even farther out a frontal system (shown way out to the northwest) will be heading our way keeping the shower chance with us.

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Air Quality Index:

Eugene-Springfield: The Air Quality Index is 12 in the Good category measuring Particulate Matter.

Oakridge: The Air Quality Index is 20 in the Good category measuring Particulate Matter.

Cottage Grove: The Air Quality Index is 12 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:

• Mostly cloudy with a slight (20%) chance of AM showers, showers likely (60%) and a bit cooler this afternoon (under 0.10 in. of rain possible), a (40%) chance of evening showers (under 0.10 in. of rain possible), just partly cloudy late tonight,
• Partly cloudy and a bit warmer Saturday, mostly clear at night,
• Mostly sunny and warmer Sunday, then mostly clear Sunday night.
• highs 57-79 lows 42-40 warming to 45 Sunday night.
• Mostly sunny and warmer Monday, partly cloudy Monday night,
• A mix of clouds and sun and cooler Tuesday, mostly cloudy with a slight (20%) chance of showers at night,
• Mostly cloudy and a bit cooler with a (40%) of showers Wednesday, cloudy with a (40%) chance of showers Wednesday night,
• Then mostly cloudy with a (30%) chance of showers and a bit cooler Thursday.
• highs 82-67 lows near 48. (seasonal averages high 64 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:

• Mostly cloudy and a bit warmer today with a (40%) chance of afternoon showers (under 0.10 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),
• Partly cloudy in the AM, sunny and warmer Saturday afternoon, clear Saturday night,
• Sunny and warmer Sunday, then mostly clear at night.
• highs 62-86 lows 44-48.
• Mostly sunny and a bit cooler Monday, partly cloudy Monday night,
• Mostly cloudy and a bit cooler with with a slight (20%) chance of showers Tuesday afternoon, cloudy with a (30%) chance of showers and a slight (20%) thunderstorms Tuesday night through Wednesday night,
• Then cloudy with a (30%) chance of showers and a bit cooler Thursday.
• highs 82-68 lows 50-52. (seasonal averages high 66 low 44).

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

• Mostly cloudy today with a (40%) chance of afternoon showers (under 0.10 in. of rain possible), a slight (20%) chance of showers this evening, just partly cloudy late tonight,
• Partly cloudy Saturday AM, sunny and a bit warmer in the afternoon, mostly clear at night,
• Sunny and warmer Sunday, then mostly clear Sunday night.
• highs 57-76 lows 46-52.
• Mostly sunny and a bit cooler Monday, partly cloudy Monday night,
• Mostly cloudy and cooler with a slight (20%) chance of showers Tuesday afternoon, cloudy with a (30%) chance of showers and a bit cooler Tuesday night through Wednesday night,
• Then mostly cloudy with a (30%) chance of showers Thursday.
• highs 70-60 lows 50-52. (seasonal averages high 57 low 45)

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Forecast for the Cascades in Lane County:

• Mostly cloudy today with a slight (20%) chance of AM rain and snow, rain and snow showers likely (70%) this afternoon (0.10 in. of rain possible) and this evening, a good (50%) chance of rain and snow showers late tonight (under 0.10 in. of rain possible, 1 in. of snow possible),
• Partly cloudy Saturday, mostly clear Saturday night,
• Mostly sunny and a bit warmer Sunday, then mostly clear Sunday night.
• snow level 5,000 ft. today, 4,500 ft. tonight, free air freezing level 5,000 ft. rising to 8,000 ft. Saturday afternoon, 10,000 ft. Saturday night through Sunday night.
• highs 42-67 lows 30-38.
• Mostly sunny and a bit warmer with a slight (20%) chance of showers Monday, partly cloudy with a slight (20%) chance of showers and thunderstorms in the evening, just partly cloudy Monday night,
• A mix of clouds and sun and much cooler with a (30%) chance of showers Tuesday, a slight (20%) chance of showers and thunderstorms in the evening, a slight (20%) chance of showers late Tuesday night,
• Mostly cloudy with a (40%) chance of showers Wednesday, cloudy with a (40%) chance of showers at night,
• Then a mix of clouds and sun with a good (50%) chance of showers Thursday.
• free air freezing level 10,000 ft. Sunday and Sunday night, snow level above 8,000 ft. Monday through Wednesday night, then 7,500 ft. Thursday.
• highs 70-57 lows near 40.

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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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