Here is my new weekly weather quiz question. What is  a “Percolation Path?” 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 low pressure trough (Shaded “U” shape with blue arrows) still controls our weather and will keep the showers around as it sends another frontal system into Oregon. The warm front pushed in this morning ad the cold front follows. The parade of storms continues with this frontal system on Saturday. Sunday yet another frontal system will be over the Pacific Ocean headed our way. Note: Don’t forget that this is the weekend when Daylight Saving Time begins. Remember to “Spring Forward” and turn your clocks ahead one hour at bedtime Saturday night. The official change occurs at 2:00 am Sunday. The Fire Department reminds you to check the batteries in your smoke detectors, CO2 detectors and  Radon detectors if you have them.

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Air Quality Index:

Eugene-Springfield: The Air Quality Index is 10 in the Good category measuring Particulate Matter.

Oakridge: The Air Quality Index is 60 in the Moderate category measuring Particulate Matter.

Cottage Grove: The Air Quality Index is 45 in the Good category measuring Particulate Matter.

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

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Advisories:

• A COASTAL FLOOD ADVISORY IS IN EFFECT UNTIL 4 AM THURSDAY FOR THE NORTH OREGON COAST AND THE CENTRAL OREGON COAST.
• A HIGH WIND WARNING IS IN EFFECT UNTIL 2 AM THURSDAY FOR THE NORTH OREGON COAST AND THE CENTRAL OREGON COAST.
• A HIGH WIND WARNING IS IN EFFECT 4 AM THURSDAY FOR THE COAST RANGE OF NORTHWEST OREGON AND THE CENTRAL COAST RANGE OF WESTERN OREGON.
• A WIND ADVISORY IS IN EFFECT UNTIL 6 AM THURSDAY FOR THE LOWER COLUMBIA, THE GREATER PORTLAND METRO AREA, THE CENTRAL  WILLAMETTE VALLEY, AND THE SOUTH WILLAMETTE VALLEY.
• A HIGH SURF WARNING IS IN EFFECT UNTIL 6 AM THURSDAY FOR FOR THE NORTH OREGON COAST AND THE CENTRAL OREGON COAST.
• A HIGH WIND WARNING IS IN EFFECT UNTIL 4 AM THURSDAY FOR THE SOUTH CENTRAL OREGON COAST AND THE CURRY COUNTY COAST.
• A HIGH WIND WARNING IS IN EFFECT UNTIL 4 AM THURSDAY FOR THE SOUTH CENTRAL OREGON CASCADES, THE SOUTHERN OREGON CASCADES, AND THE SISKIYOU MOUNTAINS.
• A HIGH WIND WARNING IS IN EFFECT UNTIL 10 AM THURSDAY FOR THE KLAMATH BASIN, NORTHERN AND EASTERN KLAMATH COUNTY, AND CENTRAL, EASTERN, AND WESTERN LAKE COUNTY.
• A HIGH SURF WARNING IS IN EFFECT UNTIL 6 AM THURSDAY FOR THE SOUTH CENTRAL OREGON COAST AND THE CURRY COUNTY COAST.
•  A WIND ADVISORY IS IN EFFECT UNTIL 10 AM THURSDAY FOR CENTRAL DOUGLAS COUNTY, EASTERN CURRY COUNTY, JOSEPHINE COUNTY, THE EASTERN DOUGLAS COUNTY FOOTHILLS, AND JACKSON COUNTY.

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Forecast for the Southern and lower Mid Willamette Valley including Eugene-Springfield and Albany-Corvallis:

• Mostly cloudy with a (40%) chance of evening rain, rain (0.75 in. of rain possible) late tonight and windy (Wind: S 20-30 mph gusts to 45 mph),
• AM rain likely (70%), a good (50%) chance of showers and a bit cooler Thursday afternoon (0.10 in. of rain possible), partly cloudy with a slight (20%) chance of showers late Thursday night (under 0.10 in. of rain possible),
• Cloudy with a good (50%) of rain and a bit cooler Friday (0.10 in. of rain possible), mostly cloudy with evening showers likely (70%), a good (50%) chance of showers late Friday night (0.10 in. of rain possible),
• Mostly cloudy with rain a bit cooler Saturday, then showers likely (70%) Saturday night.
• lows 46-38 warming to 42 Friday night cooling to 40 Saturday night highs 56-50.
• Mostly cloudy with rain Sunday through Monday, cloudy with a good (50%) chance of showers at night,
• Showers likely (60%) Tuesday, mostly cloudy with a good (50%) chance of showers at night,
• Then a mix of clouds and sun and a bit warmer with a (30%) chance of showers Wednesday.
• highs 52-50 warming to 55 Wednesday lows near 38. (seasonal averages high 55 low 37).

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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 rain tonight (0.45 in. of rain possible) and breezy (Wind: S 15-25 mph),
• AM rain, showers likely (70%) and a bit cooler Thursday afternoon (0.25 in. of rain possible), partly cloudy with a slight (20%) chance of evening showers, a slight (20%) chance of rain late at night (under 0.10 in. of rain possible),
• Mostly cloudy with AM rain, rain likely (60%) and a bit cooler Friday afternoon (0.30 in. of rain possible), cloudy with a good (50%) chance of evening showers, rain likely (60%) at night (0.15 in. of rain possible) snow level 3,500 ft. late at night),
• Mostly cloudy with AM snow (possibly heavy at times) and rain, rain and a bit cooler Saturday afternoon, then rain likely (60%) Saturday night.
• lows 49-40 highs 62-54.
• Mostly cloudy with rain and a bit warmer Sunday, evening rain, showers late Sunday night,
• Rain and a bit cooler Monday, showers likely (60%) Monday night and Tuesday, then mostly cloudy with a (40%) chance of showers Tuesday night and Wednesday ( a bit warmer).
• highs 56-54 warming to 59 Wednesday lows 40-37. (seasonal averages high 57 low 39).

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

• Mostly cloudy with rain, heavy at times, late tonight (1.00 in. of rain possible) and very windy (Wind: S 35-50 mph at the shore decreasing and shifting to SW 15-25 mph late tonight while S 25-35 mph inland decreasing and shifting to SW 15-20 mph inland late tonight),
• Mostly cloudy with rain Thursday AM, a bit cooler with coastal afternoon showers while a good (50%) chance of inland showers Thursday afternoon (0.25 in. of rain possible), partly cloudy with a slight (20%) chance of evening showers, a slight (20%) chance of rain late Thursday night,
• Mostly cloudy with rain Friday AM, rain (0.30 in. of rain possible) likely (70%) in the afternoon, a good (50%) chance of evening showers, coastal rain late while inland rain likely (70%) late Friday night (0.30 in. of rain possible),
• Mostly cloudy with rain, possibly heavy at times, and a bit cooler Saturday afternoon, then rain likely (70%) Saturday night.
• lows 50-44 highs 58-53.
• Rain, possibly heavy at times, Sunday afternoon, rain in the evening, showers late at night,
• Mostly cloudy with rain Monday, showers likely (70%) Monday night,
• Cloudy with a good (50%) chance of showers and a bit warmer Tuesday, then mostly cloudy with a (%) chance of showers Tuesday night and Wednesday.
• highs 54-58 lows near 44. (seasonal averages high 54 low 41).

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Forecast for the Cascades in Lane County:

• Mostly cloudy with a good (50%) chance of evening rain, rain late tonight and windy (Wind: S 20-30 mph gusts to 50 mph decreasing to 40 mph late tonight),
• Mostly cloudy with AM rain and snow, rain and snow showers and a bit cooler Thursday afternoon (0.50 in. of rain possible, 1-4 in. of snow possible), partly cloudy with a good (50%) chance of rain and snow showers at night,
• Rain and snow and a bit cooler Friday, evening rain and snow showers likely (70%), a (40%) chance of rain and snow  showers late Friday night,
• Mostly cloudy with rain and snow Saturday,then rain and snow showers likely (70%)  Saturday night.
• snow level 7,000 ft. tonight, 5,000 ft. Thursday through Friday, 4,500 ft. Friday night, 3,500 ft. Saturday, then 4,000 ft. Saturday night.
• lows 33-26 highs 40-36.
• Mostly cloudy with rain and snow likely (70%) Sunday through Monday, snow showers likely (70%) at night,
• Mostly cloudy with rain and snow showers likely (70%) and a bit warmer Tuesday, a good (50%) chance of rain and snow showers at night,
• Then a mix of clouds and sun and a bit warmer with a (30%) chance of rain and snow showers Wednesday.
• snow level 3,500 ft. Sunday, 4,500 ft. Sunday night, 3,000 ft. Monday through Tuesday night, then 4,000 ft. Wednesday.
• highs 38-33 warming to 38 Wednesday lows near 25.

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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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