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 9 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 10 in the Good category measuring Particulate Matter.

Data courtesy of Lane Regional Air Protection Agency (LRAPA).

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Advisories:

• A WINTER WEATHER ADVISORY IS IN EFFECT UNTIL 6 PM THIS EVENING ABOVE 3,500 FT. FOR THE NORTHERN OREGON CASCADES AND THE CASCADES IN LANE COUNTY.
• A WINTER WEATHER ADVISORY IS IN EFFECT UNTIL 10 PM TONIGHT ABOVE 5,500 FT. FOR THE SOUTH CENTRAL OREGON CASCADES, THE SOUTH OREGON CASCADES AND THE SISKIYOU MOUNTAINS.
• A WIND ADVISORY IS IN EFFECT UNTIL 5 PM TODAY FOR THE SOUTH CENTRAL OREGON COAST, THE CURRY COUNTY COAST, CENTRAL DOUGLAS COUNTY, EASTERN CURRY COUNTY, JOSEPHINE COUNTY, THE EASTERN DOUGLAS COUNTY FOOTHILLS, AND JACKSON COUNTY.
• A WIND ADVISORY IS IN EFFECT UNTIL 9 PM THIS EVENING FOR THE KLAMATH BASIN, NORTHERN AND EASTERN KLAMATH COUNTY, WESTERN LAKE COUNTY, CENTRAL LAKE COUNTY AND EASTERN LAKE COUNTY.
• A HIGH SURF ADVISORY IS IN EFFECT UNTIL 8 PM THIS EVENING FOR THE CENTRAL OREGON COAST AND THE CURRY COUNTY COAST.
• A HIGH SURF ADVISORY IS IN EFFECT UNTIL 8 PM THIS EVENING FOR THE SOUTH CENTRAL OREGON COAST AND THE CURRY COUNTY COAST.

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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 showers and a slight (20%) chance of thunderstorms this evening, a slight (20%) chance of showers late tonight (0.10 in. of rain possible, more possible in storms),
• Mostly cloudy with patchy AM fog, mostly sunny and a bit warmer Friday afternoon, Saturday, and Sunday, partly cloudy each night.
• lows 42-38 warming to 48 Sunday night highs 60-82.
• Mostly sunny and a bit cooler Monday, partly cloudy Monday night,
• A mix of clouds and sun with a slight (20%) chance of showers Tuesday and Wednesday, mostly cloudy with a slight (20%) chance of showers both nights,
• Then mostly cloudy with a (30%) chance of showers Thursday.
• highs 79-65 lows 49-46. (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 with showers this evening, isolated showers likely (60%) late tonight (snow level 3,500 ft.),
• Mostly cloudy Friday AM, partly cloudy and a bit cooler in the afternoon, mostly cloudy with patchy fog late Friday night,
• Mostly cloudy with patchy AM fog, partly cloudy and a bit warmer Saturday and Saturday night,
• Partly cloudy and warmer Sunday, then mostly clear Sunday night.
• lows 43-40 warming to 49 Sunday night highs 64-86.
• Partly cloudy and a bit warmer Monday and Monday night,
• Mostly cloudy and a bit cooler with a slight (20%) chance of showers Tuesday through Thursday.
• highs 85-68 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 scattered coastal showers this evening and isolated showers likely (60%) late tonight while  inland showers likely (60%) this evening (0.10 in. of rain possible),
• Partly cloudy Friday AM, mostly cloudy in the afternoon through Saturday AM, partly cloudy and a bit warmer in the afternoon through Sunday AM, mostly sunny and warmer in the afternoon, then mostly clear Sunday night.
• lows 43-53 highs 59-75.
• Partly cloudy and a bit cooler Monday and Monday night,
• Then mostly cloudy with a slight (20%) chance of showers a bit cooler Tuesday through Thursday.
• highs 70-59 lows 52-48. (seasonal averages high 55 low 43).

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Forecast for the Cascades in Lane County:

• Mostly cloudy with rain and snow showers and a slight (20%) chance of thunderstorms this evening, rain and snow showers late tonight (0.25 in. of rain possible, 2-4 in. of snow possible),
• Mostly cloudy with a slight (20%) chance of rain and snow showers Friday AM, just partly cloudy in the afternoon through Saturday AM, mostly sunny in and warmer in the afternoon, mostly clear Saturday night,
• Mostly sunny Sunday, then mostly clear at night.
• snow level 3,500 ft. tonight, 3,000 ft. Friday AM, free air freezing level 8,000 ft. Friday night, 9,000 ft. rising to 10,000 ft. Saturday afternoon, 11,000 ft. Saturday night, 13,000 ft. Sunday, then 11,000 ft. Sunday night.
• lows 29-36 highs 44-68.
• Mostly sunny Monday, partly cloudy Monday night,
• A mix of clouds and sun 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 11,000 ft. Monday and Monday night, snow level above 8,000 ft. Tuesday and Tuesday night, 7,500 ft. Wednesday, 8,000 ft. Wednesday night, then 7,500 ft. Thursday.
• highs 68-55 lows 38-42 cooling back to 38 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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