Here is my weekly weather quiz question. What is a “Return Stroke?”  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 high pressure ridge will slowly weaken and move eastward allowing a weak disturbance to slide in Friday just cooling us down a bit, but only a slight chance of rain. A frontal system will bring more cool air into the Pacific Northwest Saturday and again only a slight chance of rain. More frontal systems will line up to bring a little better chance or rain to Oregon.

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Air Quality Index:

Eugene-Springfield: The Air Quality Index is 38 in the Good category measuring Particulate Matter.

Oakridge: The Air Quality Index is 13 in the Good category measuring Particulate Matter.

Cottage Grove: The Air Quality Index is 36 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 (6)

Trees………. Very High (637)

Last Counted: 4/07/16

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 clear tonight,
• AM sunshine, partly cloudy and much cooler Friday afternoon, mostly cloudy at night,
• Mostly cloudy and cooler Saturday, partly cloudy Saturday night,
• A mix of clouds and sun and a bit cooler Sunday, then partly cloudy at night.
• lows 48-43 highs 74-64.
• Mostly cloudy and a bit cooler with a slight (20%) chance of showers Monday and Monday night,
• A (40%) chance of showers Tuesday, cloudy with a good (50%) chance of showers at night,
• Cloudy with a good (50%) chance of rain and a bit cooler Wednesday, a good (50%) chance of rain Wednesday night,
• Then mostly cloudy with a (40%) chance of showers and a bit warmer Thursday.
• highs 60-56 warming to 58 Thursday lows 43-45 cooling back to 43 Wednesday night. (seasonal averages high 59 low 39).

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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 clear this evening, partly cloudy late tonight,
• Partly cloudy and a bit cooler Friday, becoming mostly cloudy with a slight (20%) chance of showers Friday night through Saturday evening, turning cooler and just mostly cloudy at night,
• Mostly cloudy and a bit cooler with a slight (20%) chance of showers Sunday and Sunday night.
• lows 50-45 highs 77-67.
• Mostly cloudy with a slight (20%) chance of showers Monday, a (30%) chance of showers and a bit cooler Monday night and Tuesday, showers likely (70%) Tuesday night,
• Rain likely (70%) and a bit cooler Wednesday, becoming cloudy with a good (50%) chance of evening rain, then a (40%) chance of rain and snow showers late Wednesday night and Thursday.
• highs 66-58 lows 45-42. (seasonal averages high 60 low 41).

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

• Mostly clear this evening, mostly cloudy late tonight,
• Just mostly cloudy and a bit cooler Friday, mostly cloudy with a slight (20%) chance of showers Friday night,
• Then mostly cloudy and a bit cooler with a slight (20%) chance of showers Saturday afternoon and evening, just mostly cloudy late Saturday night,
• Then mostly cloudy with a slight (20%) chance of showers and a bit cooler Sunday and Sunday night.
• lows 49-46 highs 58-56.
• Mostly cloudy and a bit warmer with a slight (20%) chance of showers Monday, a (30%) chance of showers Monday night and Tuesday, showers likely (70%) Tuesday night,
• Rain and a bit cooler Wednesday, then mostly cloudy with a (40%) chance of showers Wednesday night and Thursday.
• highs 59-55 lows 46-44. (seasonal averages high 54 low 42).

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Forecast for the Cascades in Lane County:

• Mostly clear tonight,
• AM sunshine, a mix of clouds and sun and a bit cooler Friday, mostly cloudy with a slight (20%) chance of showers Friday night,
• Mostly cloudy with a slight (20%) chance of showers and cooler Saturday and at night,
• A mix of clouds and sun and a bit cooler Sunday, then mostly cloudy Sunday night.
• free air freezing level 13,000 ft. tonight, 12,000 ft. Friday, snow level above 8,000 ft. Friday night and Saturday, 8,000 ft. Saturday night, free air freezing level 11,000 ft. Sunday, then 10,000 ft. Sunday night.
• lows 40-32 highs 72-54.
• Mostly cloudy and a bit cooler with a (30%) chance of  showers Monday, a (40%) chance of showers Monday night,
• Mostly cloudy with  a (40%) chance of rain and snow showers and a bit cooler Tuesday, rain and snow showers likely (70%) at night,
• Rain and snow likely (70%) and a bit cooler Wednesday, cloudy with a good (50%) chance of rain and snow showers Wednesday night,
• Then mostly cloudy with a good (50%) chance of rain and snow showers Thursday.
• snow level 7,000 ft. Monday and. Monday night, 5,500 ft. Tuesday and Tuesday night, 4,500 ft. Wednesday and Wednesday night, then 3,500 ft. Thursday.
• highs 49-42 lows near 32.

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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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