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.

________________

An upper level trough of low pressure (Shaded “U” shape with blue arrows) moves closer increasing the marine airflow for more clouds and cooler temperatures. There were showers and thunderstorms in Oregon today but they stayed well North of the Southern Willamette Valley. The Eugene area saw smoke from a Slash/Burn in Douglas County. It was particularly strong in South Eugene.A frontal system is heading our way bringing showers and possible thunderstorms with it. A  frontal system is shown approaching the coast bringing increasing chances of rain to the Pacific Northwest. Next week another frontal system approaches the West Coast.

________________

Air Quality Index:

Eugene-Springfield: The Air Quality Index is 40 in the Good category measuring Particulate Matter.

Oakridge: The Air Quality Index is 15 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).

________________

Advisories: None At This Time.

________________

Eugene-Springfield Pollen Count:

Grass………. Moderate (11)

Trees………. Very High (634)

Last Counted: 4/20/16

Data Courtesy of Oregon Allergy Associates.

________________

Forecast for the Southern and lower Mid Willamette Valley including Eugene-Springfield and Albany-Corvallis:

• Mostly cloudy with a slight (20%) chance of showers this evening, just partly cloudy late tonight,
• A mix of clouds and sun and a bit cooler Thursday, mostly cloudy with showers Thursday night (0.25 in. of rain possible),
• Mostly cloudy with showers and a bit cooler Friday (0.30 in. of rain possible), a good (50%) chance of showers Friday night (0.10 in. of rain possible)and Saturday, then showers likely (70%) Saturday night.
• lows 47-52 cooling to 46 Friday night and Saturday night highs 72-60.
• Mostly cloudy and a bit cooler with showers likely (70%) Sunday, a (40%) chance of showers Sunday night,
  A mix of clouds and sun 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 and a bit warmer with a slight (20%) chance of showers Tuesday, then mostly cloudy with a (40%) chance of showers Tuesday night and Wednesday.
• highs 56-62 lows 46-37 warming back to 46 Monday night and Tuesday night. (seasonal averages high 62 low 40).

_____

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).

___________________

Forecast for Roseburg:

• Partly cloudy with a slight (20%) chance of showers this evening, increasing clouds late tonight,
• Mostly cloudy and a bit cooler with a (30%) chance of showers Thursday afternoon, showers late Thursday night (0.25 in. of rain possible) and Friday AM, showers likely (70%) and a bit cooler in the afternoon (0.25 in. of rain possible), mostly cloudy with a (40%) chance of showers Friday night (under 0.10 in. of rain possible),
• Mostly cloudy with a good (50%) chance of showers a bit cooler Saturday, then showers likely (60%) at night.
• lows 48-52 cooling to 46 Friday night and Saturday night highs 72-62.
• Mostly cloudy and a bit cooler with showers likely (60%) Sunday, a (30%) chance of evening showers, a (40%) chance of rain and snow showers late Sunday night,
• A (40%) chance of rain and snow showers in the AM, a bit warmer with a (30%) chance of showers Monday afternoon and at night,
• A slight (20%) chance of showers and a bit cooler Tuesday, then mostly cloudy with a (40%) chance of showers Tuesday night and Wednesday (a bit cooler).
• highs 60-66 cooling back to 60 Wednesday lows 40-44. (seasonal averages high 63 low 43).

________________

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

• Partly cloudy this evening, just mostly cloudy late tonight,
• Mostly cloudy with a slight (20%) chance of showers Thursday, coastal showers likely (70%) at night while inland evening showers and inland showers likely (70%) late Thursday night (0.25 in. of rain possible),
• Mostly cloudy with AM showers, showers likely (70%) and a bit cooler Friday afternoon (0.25 in. of rain possible), a (40%) chance of showers at night (0.10 in. of rain possible),
• Mostly cloudy with a (40%) chance of showers and a bit cooler Saturday, then showers likely (70%) Saturday night.
• lows 52-48 highs 62-57.
• Mostly cloudy and a bit cooler with showers likely (70%) Sunday, a (30%) chance of showers Sunday night and Monday (a bit warmer), mostly cloudy cloudy with a slight (20%) chance of showers Monday night and  Tuesday, then mostly cloudy with a (40%) chance of showers Tuesday night and Wednesday.
• highs 54-58 lows 42-47. (seasonal averages high 56 low 43).

________________

Forecast for the Cascades in Lane County:

• Mostly cloudy with a (40%) chance of evening showers and a slight (20%) chance of thunderstorms, just partly cloudy late tonight (under 0.10 in. of rain possible, more in thunderstorms, evening small hail possible),
• AM sun, partly cloudy with a slight (20%) chance of showers and a bit cooler Thursday afternoon, showers likely (70%) Thursday night,
• Mostly cloudy with showers Friday AM, showers and a slight (20%) chance of thunderstorms and a bit cooler in the afternoon, cloudy with evening showers likely (70%), a good (50%) chance of showers late Friday night,
• Mostly cloudy with a good (50%) chance of rain and snow showers Saturday, then rain and snow showers likely (70%) at night.
• snow level 9,000 ft. tonight through Thursday night, 6,500 ft. Friday, 6,000 ft. Friday night, then 5,500 ft. Saturday and Saturday night.
• lows 38-40 cooling to 33 Saturday night highs 62-47.
• Mostly cloudy with rain and snow showers likely (70%) and a bit cooler Sunday, a good (50%) chance of rain and snow showers Sunday night,
• A mix of clouds and sun and a bit warmer with a (30%) chance of rain and snow showers Monday, partly cloudy with a (30%) chance of rain and snow showers at night,
• A mix of clouds and sun with a (40%) chance of rain and snow showers and a bit warmer Tuesday, then mostly cloudy with a (40%) chance of rain and snow showers Tuesday night and Wednesday.
• snow level 4,500 ft. Sunday, 3,500 ft. Sunday night, 3,000 ft. Monday, 4,000 ft. Monday night, 3,500 ft. Tuesday, then 4,500 ft. Tuesday night and Wednesday.
• highs 38-48 cooling to 46 Wednesday lows 24-32.

________________

**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.

________________

Get your local Eugene-Springfield and Lane County news on-line at eugenedailynews.com.

________________