Here is my weekly weather quiz question. What is  “Residual Moisture?” 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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Greek Letter Omega – Blocking High Pressure Shaped Like It. | Image by wiki.com

An upper level ridge of high pressure, called an “Omega Block” because it is shaped like the Greek letter Omega, (Shaded “Arch” shape with blue arrows) has taken over clearing us out and keeping the sunshine around for the rest of the workweek. A cold front sneaks by the ridge and crosses the Oregon coast Saturday with another front right behind it and you know what that means, some clouds and maybe some rain. Maybe another chance of minimally active weather Sunday from a weak frontal system with the warm front ready to bend up into Oregon.

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Air Quality Index:

Eugene-Springfield: The Air Quality Index is 24 in the Good category measuring Particulate Matter.

Oakridge: The Air Quality Index is 10 in the Good category measuring Particulate Matter.

Cottage Grove: The Air Quality Index is 18 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………. Low (2)

Trees………. High (373)

Last Counted: 3/30/16

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:

• Clear tonight, sunny and a bit warmer Thursday and Friday, clear Thursday night, mostly clear Friday night,
• Partly cloudy and a bit cooler Saturday with a slight (20%) chance of afternoon showers, then just partly cloudy at night.
• lows 36-42 highs 70-72 cooling to 67 Saturday.
• A mix of clouds and sun and a bit cooler Sunday, becoming mostly cloudy with a (30%) chance of rain Sunday night,
• Cloudy with a good (50%) chance  of rain and a bit cooler Monday, mostly cloudy with a (40%) chance of showers Monday night,
• A slight (20%) chance of showers Tuesday, mostly cloudy at night,
• Then just partly cloudy and a bit warmer Wednesday.
• highs 67-57 warming to 62 Wednesday lows 46-40 warming to 43 Tuesday night. (seasonal averages high 58 low 38).

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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:

• Clear tonight,
• Sunny Thursday and Friday, clear Thursday night, mostly clear Friday night,
• Partly cloudy and a bit cooler with a slight (20%) chance of showers Saturday afternoon, just partly cloudy late at night.
• lows 42-46 cooling to 44 Saturday night highs 72-68.
• Mostly cloudy Sunday, mostly cloudy with a (30%) chance of showers Sunday night through Monday night (a bit cooler Monday),
• Mostly cloudy with a slight (20%) chance of showers Tuesday, mostly cloudy at night,
• Then just partly cloudy and a bit warmer Wednesday.
• highs 68-62 warming back to 68 Wednesday lows 46-42. (seasonal averages high 59 low 40).

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

• Clear tonight,
• Sunny Thursday and Friday, clear Thursday night, clear in the evening, then partly cloudy Friday night through Saturday night.
• lows near 46 highs 63-59.
• Mostly cloudy Sunday, mostly cloudy with a (30%) chance of showers Sunday night through Monday night (a bit cooler Monday),
• A slight (20%) chance of showers and warmer Tuesday, mostly cloudy at night,
• Then just partly cloudy Wednesday.
• highs 62-57 warming to 65 Wednesday lows 48-45. (seasonal averages high 54 low 42).

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Forecast for the Cascades in Lane County:

• Clear tonight,
• Sunny Thursday, mostly clear Thursday night,
• Mostly sunny and a bit warmer Friday, partly cloudy Friday night,
• A mix of clouds and sun with a slight (20%) chance of showers and a bit cooler Saturday, then partly cloudy with a slight (20%) chance of showers at night.
• free air freezing level 10,000 ft. tonight through Friday night, then snow level 8,000 ft. Saturday and Saturday night.
• lows 29-34 cooling to 32 Saturday night highs 55-58 cooling back to 55 Saturday.
• Partly cloudy Sunday, becoming mostly cloudy with a good (50%) chance of rain Sunday night,
• Mostly cloudy and a bit cooler with rain likely (70%) Monday, a good (50%) chance of showers Monday night,
• A slight (20%) chance of rain and snow showers and a bit cooler Tuesday, just mostly cloudy at night,
• Then partly cloudy and warmer Wednesday.
• free air freezing level 9,000 ft. Sunday, snow level 8,000 ft. Sunday night, 6,000 ft. Monday, 5,000 ft. Monday night, 4,500 ft. Tuesday, free air freezing level 7,500 ft. Tuesday night, then 8, 000 ft. Wednesday.
• highs 54-44 warming to 52 Wednesday lows 36-28 warming to 32 Tuesday night.

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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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