Here is my weekly weather quiz question. What is a “Ribbon Lightning?” 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 (Shaded “Arch” shape with blue arrows) will slowly get stronger and move over us for a rather rapid warmup to what could be record high temperatures. By Monday we’ll have a frontal system poised offshore getting ready to attack. By early Tuesday a frontal system will be pushing through the Pacific Northwest. Another frontal system moves eastward toward us Thursday.

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Air Quality Index:

Eugene-Springfield: The Air Quality Index is 20 in the Good category measuring Particulate Matter.

Oakridge: The Air Quality Index is 8 in the Good category measuring Particulate Matter.

Cottage Grove: The Air Quality Index is 16 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 (4)

Trees………. Very High (365)

Last Counted: 4/13/16

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 cloudy with patchy AM fog, mostly sunny and a bit warmer this afternoon, Saturday, and Sunday, partly cloudy each night.
• highs 60-82 lows 40-50.
• Mostly sunny and a bit cooler Monday, partly cloudy Monday night,
• Partly cloudy and cooler Tuesday, mostly cloudy with a slight (20%) chance of showers at night through Thursday.
• highs 79-69 lows 50-48. (seasonal averages high 61 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 cloudy this AM, partly cloudy and a bit cooler this afternoon, partly cloudy this evening, mostly cloudy with patchy fog late tonight,
• Partly cloudy with patchy AM fog, partly cloudy and a bit warmer Saturday and Saturday night,
• Partly cloudy Sunday AM, mostly sunny and warmer in the afternoon, then mostly clear Sunday night.
• highs 64-88 lows 40-50.
• Partly cloudy and a bit cooler Monday, mostly cloudy Monday night,
• Mostly cloudy and a bit cooler with a slight (20%) chance of showers Tuesday through Thursday.
• highs 89-72 lows 49-47. (seasonal averages high 62 low 42).

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

• Mostly cloudy this AM, partly cloudy this afternoon,mostly cloudy tonight,
• Partly cloudy and a bit warmer Saturday through Sunday AM, mostly sunny and warmer in the afternoon, then mostly clear Sunday night.
• highs 59-75 lows 44-55.
• Partly cloudy and a bit cooler Monday, mostly cloudy Monday night,
• Then mostly cloudy with a slight (20%) chance of showers a bit cooler Tuesday through Thursday.
• highs 72-60 lows 52-48. (seasonal averages high 55 low 43).

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Forecast for the Cascades in Lane County:

• Partly cloudy today through Saturday AM, mostly sunny and warmer in the afternoon, partly cloudy Saturday night,
• Mostly sunny in the AM, a mix of clouds and sun and warmer Sunday, then mostly clear at night.
• free air freezing level 4,500 ft. rising to 5,500 ft. this afternoon, 8,000 ft. tonight and Saturday, 11,000 ft. Saturday night and Sunday, then 12,000 ft. Sunday night.
• highs 47-68 lows 30-38.
• Mostly sunny Monday, partly cloudy Monday night,
• Partly cloudy with a slight (20%) chance of showers and cooler Tuesday, Wednesday, and Thursday, mostly cloudy with a slight (20%) chance of showers at night,
• free air freezing level 12,000 ft. Monday, 11,000 ft. Monday night, snow level above 8,000 ft. Tuesday and Tuesday night, 8,000 ft. Wednesday, then above 8,000 ft. Wednesday night and Thursday.
• highs 66-50 lows 43-38t.

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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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