Here is my weekly weather quiz question for the last time. What is  “Rime Ice?” Here is the correct answer. Rime Ice is an opaque coating of tiny, white, granular ice particles caused by the rapid freezing of supercooled water droplets on impact with an object. See also clear ice.I’ll have a new weekly weather quiz question for you starting Monday. 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 12 in the Good category measuring Particulate Matter.

Oakridge: The Air Quality Index is 8 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 (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:

• Mostly cloudy with a good (50%) chance of scattered showers and a slight (20%) chance of thunderstorms with small hail possible this evening, a good (50%) chance of isolated showers and colder late tonight (under 0.10 in. of rain possible, more in storms),
• A mix of clouds and sun and a bit warmer with a (30%) chance of showers Monday (under 0.10 in. of rain possible), mostly cloudy with patchy fog late at night 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, then just mostly cloudy at night.
• lows 36-44 highs 57-62 cooling to 60 Wednesday.
• A mix of clouds and sun and a bit warmer Thursday, Friday and Saturday, partly cloudy each night,
• Then partly cloudy and a bit warmer 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:

• Mostly cloudy with showers likely (60%) and a slight (20%) chance of evening thunderstorms, a (30%) chance of rain and snow showers late tonight (under 0.10 in. of rain possible, snow level 3,500 ft. falling to 3,000 ft. late tonight),
• Mostly cloudy with a slight (20%) chance of AM rain and snow showers, a slight (20%) chance of showers and a bit warmer Monday afternoon (under 0.10 in. of rain possible, snow level 2,500 ft. rising to 3,500 ft.), partly cloudy in the evening, mostly cloudy with patchy fog and possible frost late Monday night and very early Tuesday AM, partly cloudy with patchy AM fog, increasing clouds to mostly cloudy and a bit warmer Tuesday afternoon, a (30%) chance of showers 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.
• lows 40-37 warming to 45 Wednesday night highs 59-62.
• 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 64 low 43).

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

• Mostly cloudy with evening showers likely (70%), a (30%) chance of showers late tonight (under 0.10 in. of rain possible),
• Mostly cloudy with a (30%) chance of AM coastal showers while and partly cloudy in the afternoon while mostly cloudy and a bit warmer with a slight (20%) chance of inland showers Monday (under 0.10 in. of rain possible), just partly cloudy Monday night and Tuesday AM, mostly cloudy in the afternoon, cloudy with a good (50%) chance of evening coastal showers and showers likely (60%) at night while a (40%) chance of inland showers Tuesday night (under 0.10 in. of rain possible),
• Cloudy with a good (50%) chance of showers and a bit warmer Wednesday, then mostly cloudy with a slight (20%) chance of showers 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:

• Cloudy with rain and snow showers and isolated thunderstorms with small hail possible this evening, scattered rain and snow showers and colder late tonight (0.10 in. of rain possible, 2 in. of snow possible),
• Mostly cloudy with a good (50%) chance of scattered rain and snow showers and a bit warmer Monday (under 0.10 in. of rain possible), partly cloudy with a slight (20%) chance of rain and snow showers in the evening, just at partly cloudy Monday night and Tuesday, mostly cloudy with a slight (20%) chance of rain and snow showers 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. tonight, 3,000 ft. rising to 4,000 ft. Monday afternoon, 4,000 ft. Monday night, free air freezing level 4,500 ft. rising to 5,500 ft. Tuesday afternoon, snow level 4,500 ft. Tuesday night and Wednesday, then 6,000 ft. Wednesday night.
• lows 24-32 highs 42-48 cooling to 45 Wednesday.
• A mix of clouds and sun and a bit warmer Thursday, partly cloudy and a bit warmer Thursday night and Friday, mostly cloudy 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, 7,500 ft. Friday night, 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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