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.

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Air Quality Index:

Eugene-Springfield: The Air Quality Index is 25 in the Good category measuring Particulate Matter.

Oakridge: The Air Quality Index is 7 in the Good category measuring Particulate Matter.

Cottage Grove: The Air Quality Index is 20 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:

• Patchy fog this AM, sunny and a bit warmer this afternoon, Thursday, and Friday, clear each night.
• highs 67-70 lows 37-42.
• A mix of clouds and sun and a bit cooler with a slight (20%) chance of showers Saturday, mostly 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 rain and a bit cooler Monday, then mostly cloudy with a (30%) chance of showers Monday night and Tuesday.
• highs 66-57 lows 42-45 cooling back to 42 Sunday 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:

• Patchy AM fog, sunny and warmer this afternoon, Thursday, and Friday, clear each night.
• highs near 73 lows 43-47.
• Partly cloudy and a bit cooler with a slight (20%) chance of showers Saturday afternoon and evening, just partly cloudy late at night,
• Partly cloudy and a bit warmer 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 67-62 lows 46-43. (seasonal averages high 59 low 40).

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

• Sunny and a bit warmer today, clear tonight,
• Sunny and a bit cooler Thursday, clear at night with patchy coastal fog late,
• Mostly cloudy with patchy AM coastal fog and sunny in the afternoon while sunny inland Friday, clear in the evening, partly cloudy at night.
• highs 66-62 lows 46-48 cooling back to 46 Friday night.
• Partly cloudy with a slight (20%) chance of showers and a bit cooler Saturday afternoon, just partly cloudy in the evening, mostly cloudy with a slight (20%) chance of showers Saturday night,
• Mostly cloudy and a bit cooler Sunday, a (30%) chance of showers Sunday night through Monday night, then cloudy with a slight (20%) 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:

• Sunny and a bit warmer today and Thursday, mostly clear both nights,
• Mostly sunny and a bit cooler Friday, then partly cloudy Friday night.
• free air freezing level 7,500 ft. rising to 10,000 ft. this afternoon, 11,000 ft. tonight, 10,000 ft. Thursday and Thursday night, 11,000 ft. Friday, then 10,000 ft. Friday night.
• highs 54-58 cooling back to 54 Friday lows 28-37.
• 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 8,000 ft. Saturday through Sunday night, 7,000 ft. Monday, 6,000 ft. Monday night, then 5,500 ft. Tuesday.
• highs 52-44 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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