Here is my weekly weather quiz question. What is  “Rime Ice?” 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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An upper level trough of low pressure (Shaded “U” shape with blue arrows) moves in increasing the marine airflow for more clouds and cooler temperatures and showers with possible thunderstorms. Another low will follow closely behind it Sunday. A frontal system is heading our way bringing showers and possible thunderstorms with it. A  frontal system is shown moving through the Pacific Northwest Sunday. By the middle of next week another frontal system approaches the West Coast.

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Air Quality Index:

Eugene-Springfield: The Air Quality Index is 35 in the Good category measuring Particulate Matter.

Oakridge: The Air Quality Index is 33 in the Good category measuring Particulate Matter.

Cottage Grove: The Air Quality Index is 23 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: 4/20/16

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 (40%) chance of showers this evening, showers becoming likely (60%) with a slight (20%) chance of thunderstorms this evening, showers likely (70%) late tonight (0.75 in. of rain possible, more in storms),
• Mostly cloudy with AM showers, showers with a slight (20%) chance of thunderstorms in the afternoon and a bit cooler Friday (0.25 in. of rain possible, more in storms), a good (50%) chance of evening showers with a slight (20%) chance of thunderstorms, a slight (20%) chance of showers late Friday night (under 0.10 in. of rain possible, more in storms),
• A good (50%) chance of showers and a bit cooler Saturday (0.10 in. of rain possible), showers likely (70%) Saturday night (0.25 in. of rain possible) and Sunday (a bit cooler), then mostly cloudy with a good (50%) chance of showers Sunday night.
• lows 52-37 highs 62-56.
• Mostly cloudy and a bit warmer with a (30%) chance of showers Monday, partly cloudy with a slight (20%) chance of showers at night,
• A mix of clouds and sun with a slight (20%) chance of showers Tuesday, mostly cloudy with a (40%) chance of showers Tuesday night,
• Mostly cloudy with a good (50%) chance of showers Wednesday, a (30%) chance of showers at night,
• Then a mix of clouds and sun and a bit warmer Thursday.
• highs 60-62 lows 38-45 cooling to 42 Wednesday night. (seasonal averages high 62 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 and a slight (20%) chance of thunderstorms this evening, showers late tonight (0.40 in. of rain possible) and Friday AM, showers likely (70%) with a slight (20%) chance of thunderstorms and a bit cooler in the afternoon (0.25 in. of rain possible), mostly cloudy with a (40%) chance of evening showers and a slight (20%) chance of thunderstorms, a (40%) chance of showers late Friday night (under 0.10 in. of rain possible),
• Mostly cloudy with a (30%) chance of showers and a bit cooler Saturday afternoon (under 0.10 in. of rain possible), showers likely (60%) and a bit cooler late at night (0.15 in. of rain possible) and Sunday, then mostly cloudy with a (30%) chance of rain and snow showers Sunday night.
• lows 53-39 highs 62-55.
• Mostly cloudy and a nit warmer with a (40%) chance of rain and snow showers Monday, a (30%) chance of showers at night,
• Just mostly cloudy and a bit warmer Tuesday, mostly cloudy with a (40%) chance of showers Tuesday night through Wednesday night,
• Then mostly cloudy with a slight (20%) chance of showers and a bit warmer Thursday.
• highs 58-68 lows 42-45. (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 a good (50%) chance of evening showers and a slight (20%) chance of thunderstorms, showers likely (70%) late tonight (0.25 in. of rain possible) and Friday (0.25 in. of rain possible), a (30%) chance of showers at night (0.10 in. of rain possible),
• Cloudy with a (40%) chance of AM coastal showers and a bit cooler with showers likely (60%) in the afternoon and evening while a (30%) chance of inland showers Saturday afternoon (0.25 in. of rain possible) and evening, then showers late Saturday night (0.15 in. of rain possible),
• Mostly cloudy with showers likely (70%) and a slight (20%) chance of thunderstorms Sunday AM, showers likely (70%) and a bit cooler in the afternoon, then mostly cloudy with a (30%) chance of showers Sunday night.
• lows 52-42 highs 60-55.
• Mostly cloudy with a (40%) chance of showers and a bit warmer Monday and Monday night,
• A slight (20%) chance of showers and a bit warmer Tuesday, then mostly cloudy with a (40%) chance of showers Tuesday night through Wednesday night,
• Then mostly cloudy and a bit warmer with a slight (20%) chance of showers Thursday.
• highs 56-62 lows 44-47. (seasonal averages high 56 low 44).

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Forecast for the Cascades in Lane County:

• Mostly cloudy a slight (20%) chance of thunderstorms this evening, rain likely (70%) late tonight (0.25 in. of rain possible, more in storms),
• Mostly cloudy with showers Friday AM, rain and snow showers with a slight (20%) chance of thunderstorms and a bit cooler in the afternoon (0.50 in. of rain possible), becoming cloudy with rain and snow showers likely (60%) and a slight (20%) chance of thunderstorms in the evening, a good (50%) chance of rain and snow showers late Friday night,
• Mostly cloudy with a good (50%) chance of AM rain and snow showers Saturday, rain and snow showers likely (70%) in the afternoon and at night,
• Mostly cloudy with rain and snow showers and a bit cooler Sunday, then a good (50%) chance of rain and snow showers Sunday night.
• snow level above 8,000 ft. falling to 7,500 ft. late tonight, 6,500 ft. falling to 5,000 ft. Friday afternoon, 4,500 ft. Friday night through Saturday night, 4,000 ft. Sunday, then 4,000 ft. Sunday night.
• lows 38-25 highs 48-38.
• Mostly cloudy and a bit warmer with a good (50%) chance of rain and snow showers Monday, a (30%) chance of rain and snow showers at night,
• A mix of clouds and sun with a slight (20%) chance of rain and snow showers and a bit warmer Tuesday, mostly cloudy with a (40%) chance of rain and snow showers Tuesday night,
• Mostly cloudy and a bit cooler with a good (50%) chance of rain and snow showers Wednesday and Wednesday night,
• Then  mostly cloudy with a slight (20%) chance of showers and a bit warmer Thursday.
• snow level 2,500 ft. Monday, 4,000 ft. Monday night and Tuesday, 4,500 ft. Tuesday night, 5,000 ft. Wednesday, 5,500 ft. Wednesday night, then 6,000 ft. Thursday.
• highs 42-48 cooling to 45 Wednesday warming back to 48 Thursday lows 27-30.

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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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