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 becoming shaped like the Greek letter Omega, (Shaded “Arch” shape with blue arrows) takes 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, clouds and maybe rain. Maybe more active weather Sunday from a complex frontal system.

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Air Quality Index:

Eugene-Springfield: The Air Quality Index is 16 in the Good category measuring Particulate Matter.

Oakridge: The Air Quality Index is 21 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 (160)

Last Counted: 3/29/16

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 with patchy fog tonight and Wednesday AM, sunny and a bit warmer Wednesday afternoon, Thursday, and Friday, clear each night.
• lows 35-42 highs 67-70.
• A mix of clouds and sun and a bit cooler with a slight (20%) chance of showers Saturday, partly cloudy at night,
• A mix of clouds and sun and a bit cooler Sunday, becoming mostly cloudy with a slight (20%) chance of rain Sunday night,
• A (40%) chance  of showers and a bit cooler Monday, then mostly cloudy with a (30%) chance of showers Monday night and Tuesday.
• highs 62-57 lows 42-44. (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 and warmer Wednesday, Thursday, and Friday, clear each night.
• lows 36-46 highs near 72.
• Partly cloudy and a bit cooler with a slight (20%) chance of showers Saturday, just partly cloudy at night,
• Partly cloudy and a bit warmer with a slight (20%) chance of showers Sunday, mostly cloudy with a slight (20%) chance of showers Sunday night,
• Mostly cloudy with a (40%) chance of showers and a bit cooler Monday and Monday night,
• Then cloudy with a slight (20%) chance of showers Tuesday.
• highs 65-67 cooling to 62 Monday and Tuesday lows near 44. (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 and a bit warmer Wednesday, clear at night,
• Sunny and a bit cooler Thursday, clear at night with patchy coastal fog late,
• Patchy AM fog, sunny Friday, clear at night.
• lows 42-47 highs 66-62.
• Partly cloudy with a slight (20%) chance of showers and a bit cooler Saturday, just partly cloudy Saturday night,
• Mostly cloudy and a bit cooler with a slight (20%) chance of showers Sunday, a (30%) chance of showers Sunday night through Monday night, then cloudy with a slight 30%) chance of showers Tuesday..
• highs 60-57 lows near 46. (seasonal averages high 54 low 42).

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Forecast for the Cascades in Lane County:

• Mostly clear late tonight,
• Sunny and a bit warmer Wednesday and Thursday, mostly clear both nights,
• Mostly sunny and a bit cooler Friday, then mostly clear Friday night.
• free air freezing level 6,500 ft. tonight, 7,500 ft. rising to 11,000 ft. Wednesday afternoon, 11,000 ft. Wednesday night, 10,000 ft. Thursday and Thursday night, 11,000 ft. Friday, then 10,000 ft. Friday night.
• lows 28-37 highs 54-58 cooling back to 54 Friday.
• A mix of clouds and sun with a slight (20%) chance of showers and a bit cooler Saturday, partly cloudy with a slight (20%) chance of showers at night,
• A mix of clouds and sun Sunday, becoming mostly cloudy with a slight (20%) chance of rain Sunday night,
• A mix of clouds and sun and a bit cooler with a (40%) chance of showers Monday, then mostly cloudy with a (40%) chance of showers Monday night and Tuesday (a bit cooler).
• snow level 7,500 ft. Saturday, 7,500 ft. Saturday night, free air freezing level 6,000 ft. Sunday, 7,000 ft. Sunday night, 6,500 ft. Monday, then 6,000 ft. Monday night and Tuesday.
• highs 50-44 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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