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 just cooling us down a bit. A frontal system will bring more cool air into the Pacific Northwest Saturday and again no significant 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 22 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 19 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:

• Partly cloudy this evening, becoming mostly cloudy late tonight,
• AM clouds, a mix of clouds and sun and cooler Saturday afternoon, partly cloudy and a bit cooler Saturday night through Sunday night,
• Increasing clouds to mostly cloudy and a bit cooler Monday, then a slight (20%) chance of showers Monday night.
• lows 48-43 warming to 45 Monday highs 67-60.
• Mostly cloudy with a good (50%) chance of showers Tuesday through Wednesday, a (40%) chance of showers Wednesday night and Thursday (cooler), mostly cloudy with a slight (20%) chance of showers at night,
• Then a mix of clouds and sun with a slight (20%) chance of showers Friday.
• highs 62-58 lows 45-43. (seasonal averages high 60 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:

• Partly cloudy this evening, increasing clouds to mostly cloudy late tonight,
• Mostly cloudy with a slight (20%) chance of thunderstorms Saturday afternoon, partly cloudy with a slight (20%) chance of evening thunderstorms, mostly cloudy and turning cooler late Saturday night,
• Partly cloudy and a bit cooler with a slight (20%) chance of thunderstorms Sunday afternoon, mostly cloudy with a slight (20%) chance of evening thunderstorms, just mostly cloudy late Sunday night,
• Cloudy Monday, then cloudy with a slight (20%) chance of rain Monday night.
• lows 49-45 highs 72-67.
• Mostly cloudy with showers likely (70%) and a bit cooler Tuesday, cloudy with a good (50%) chance of showers Tuesday night,
• Showers likely (70%) and a bit cooler Wednesday, becoming cloudy with a good (50%) chance of showers Wednesday night,
• Mostly cloudy with a (40%) chance of showers Thursday and Thursday night,
• Then mostly cloudy with a slight (20%) chance of showers Friday.
• highs 62-64 cooling to 59 Thursday warming to 62 Friday lows 44-42. (seasonal averages high 61 low 41).

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

• Mostly cloudy tonight through Saturday night,
• Mostly cloudy Sunday AM, partly cloudy in the afternoon, just mostly cloudy Sunday night and Monday (a bit warmer), then cloudy with a slight (20%) chance of rain late Monday night.
• lows 50-46 warming to 48 Monday night highs 57-60.
• Mostly cloudy with showers likely (60%) Tuesday, cloudy with a good (50%) chance of showers Tuesday night,
• Showers Wednesday, then mostly cloudy with a good (50%) chance of showers Wednesday night through Thursday night (a bit cooler Thursday),
• Then mostly cloudy with a slight (20%) chance of showers and a bit warmer Friday.
• highs 59-55 warming to 58 Friday lows near 46. (seasonal averages high 55 low 43).

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Forecast for the Cascades in Lane County:

• Partly cloudy tonight and Saturday AM, partly cloudy with a slight (20%) chance of showers in the afternoon and evening, just partly cloudy Saturday night,
• Partly cloudy in the AM, partly cloudy and a bit cooler with a slight (20%) chance of showers Sunday afternoon, a (30%) chance of evening showers, partly cloudy late Sunday night,
• AM clouds and sun, clouds increasing to mostly cloudy and a bit cooler Monday afternoon, then a (40%) chance of  showers at night.
• free air freezing level 12,000 ft. tonight, snow level 9,000 ft. Saturday and Saturday night, then 8,000 ft. Sunday through Monday night.
• lows 42-34 highs 62-54.
• Mostly cloudy with showers likely (70%) and a bit cooler Tuesday, a good (50%) chance of showers Tuesday night,
• Cloudy with a good (50%) chance of showers and a bit cooler Wednesday and Wednesday night,
• Mostly cloudy and a bit cooler with a good (50%) chance of rain and snow showers Thursday, a (30%) chance of showers at night,
• Then a mix of clouds and sun with a slight (20%) chance of showers Friday.
• snow level 6,500 ft. Tuesday, 5,500 ft. Tuesday night, 4,500 ft. Wednesday through Thursday, 4,000 ft. Thursday night, then 3,500 ft. Friday.
• highs 49-43 lows 32-29.

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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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