Here is my weekly weather quiz question for the last time. What is a “Ribbon Lightning?” Here is the correct answer. Ribbon Lightning Appears to be a broad stream of fire. A succession of strokes, each blown a bit to the side of the previous strokes by wind, but striking so fast that all the strokes are seen at once as a ribbon-like flash. I’ll have a new weekly weather quiz question for you starting Monday. 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) is getting stronger and moving over us for a rather rapid warmup to what could reach record high temperatures. By Monday we’ll have a frontal system poised offshore moving our way bringing the chance of showers and thunderstorms out ahead of and long it. By early Wednesday the frontal system moves onshore bringing showers with it. As you can see a frontal system hangs offshore on its way to the Pacific Coast next Friday.

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Air Quality Index:

Eugene-Springfield: The Air Quality Index is 17 in the Good category measuring Particulate Matter.

Oakridge: The Air Quality Index is 5 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 (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, partly cloudy tonight and Sunday AM, mostly sunny and warmer in the afternoon, mostly clear Sunday night,
• Mostly sunny and warm Monday, then partly cloudy Monday night.
• highs 72-82 lows 43-50.
• Partly cloudy and much cooler Tuesday, partly cloudy with a slight (20%) chance of showers Tuesday night,
• A mix of clouds and sun and a bit cooler with a (30%) chance of showers Wednesday, mostly cloudy with a (30%) chance of showers at night,
• Mostly cloudy with a (40%) chance of showers Thursday, mostly cloudy with a good (50%) chance of showers Thursday night,
• Then mostly cloudy and a bit cooler with a (40%) chance of showers Friday.
• highs 78-63 lows 50-47. (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:

• Partly cloudy with patchy AM fog, sunny and a bit warmer this afternoon, partly cloudy this evening, mostly clear late tonight,
• Partly cloudy and warmer Sunday, mostly clear Sunday night,
• Then just partly cloudy and a bit cooler Monday and Monday night.
• highs 77-89 cooling to 87 Monday lows 47-50.
• Partly cloudy and a bit cooler with a slight (20%) chance of showers Tuesday, mostly cloudy with a slight (20%) chance of evening thunderstorms, a slight (20%) chance of showers and a bit cooler Tuesday night through Wednesday night,
• Then mostly cloudy with a (30%) chance of showers Thursday through Friday.
• highs 77-67 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:

• Partly cloudy with patchy AM fog, sunny and a bit cooler this afternoon, partly cloudy tonight,
• Partly cloudy in the AM, sunny and warmer Sunday afternoon, mostly clear Sunday night,
• Then partly cloudy and a bit cooler Monday and Monday night.
• highs 67-74 cooling to 70 Monday lows 50-55 cooling to 52 Monday night.
• Partly cloudy and a bit cooler Tuesday, mostly cloudy with a slight (20%) chance of showers a bit cooler Tuesday night through Thursday, then mostly cloudy with a (30%) chance of showers and a bit cooler Thursday night and Friday.
• highs 65-58 lows 50-48. (seasonal averages high 55 low 43).

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Forecast for the Cascades in Lane County:

• Partly cloudy this AM, sunny and warmer this afternoon, partly cloudy tonight,
• Mostly sunny and warmer Sunday and Monday, mostly clear both nights.
• free air freezing level 8,000 ft. rising to 10,000 ft. this afternoon, 11,000 ft. tonight, 12,000 ft. Sunday 13,000 ft. Sunday night, then 12,000 ft. Monday and Monday night.
• highs 60-72 lows 35-42.
• AM sun, partly cloudy with a slight (20%) chance of showers and thunderstorms and cooler Tuesday and Tuesday night,
• Mostly cloudy with a (30%) chance of showers and a bit cooler Wednesday, mostly cloudy with a (40%) chance of showers at night,
• A mix of clouds and sun and a bit cooler with a good (50%) chance of showers Thursday and Thursday night,
• Then mostly cloudy and a bit cooler with a (40%) chance of showers Friday.
• snow level above 8,000 ft. Tuesday and Tuesday night, 8,000 ft. Wednesday and Wednesday night, 7,000 ft. Thursday, 6,500 ft. Thursday night, then 6,000 ft. Friday.
• highs 63-50 lows 38-34.

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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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