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. More storms will follow as a frontal system (position shown is Thursday AM) pushes through today,  and between tonight and Thursday morning. We will be visited by yet another frontal system moves in Friday. The parade of storms continues with this frontal system on Sunday. 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 14 in the Good category measuring Particulate Matter.

Oakridge: The Air Quality Index is 55 in the Moderate category measuring Particulate Matter.

Cottage Grove: The Air Quality Index is 51 in the Moderate 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 FROM NOON TODAY UNTIL 4 AM THURSDAY FOR THE NORTH OREGON COAST AND THE CENTRAL OREGON COAST.
• A HIGH WIND WARNING IS IN EFFECT FROM 1 PM TODAY UNTIL 2 AM THURSDAY FOR THE NORTH OREGON COAST AND THE CENTRAL OREGON COAST.
• A HIGH WIND WARNING IS IN EFFECT FROM 4 PM TODAY UNTIL 4 AM THURSDAY FOR THE COAST RANGE OF NORTHWEST OREGON, AND THE CENTRAL COAST RANGE OF WESTERN OREGON.
• A WIND ADVISORY IS IN EFFECT FROM 4 PM THIS AFTERNOON 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 ADVISORY IS IN EFFECT UNTIL 4 AM THURSDAY FOR FOR THE NORTH OREGON COAST AND THE CENTRAL OREGON COAST.
• A WINTER WEATHER ADVISORY IS IN EFFECT UNTIL 4 PM TODAY ABOVE 3,500 FT. FOR THE NORTHERN OREGON CASCADES NOT INCLUDING THE CASCADES IN LANE COUNTY.
• A HIGH WIND WARNING IS IN EFFECT FROM 1 PM TODAY UNTIL 4 AM THURSDAY FOR THE SOUTH CENTRAL OREGON COAST AND THE CURRY COUNTY COAST.
• A HIGH WIND WARNING IS IN EFFECT FROM 4 PM THIS AFTERNOON 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 FROM 4 PM THIS AFTERNOON UNTIL 10 AM THURSDAY FOR THE KLAMATH BASIN, NORTHERN AND EASTERN KLAMATH COUNTY, AND CENTRAL, EASTERN, AND WESTERN LAKE COUNTY.
• A WIND ADVISORY IS IN EFFECT FROM 1 PM TODAY UNTIL 10 AM THURSDAY FOR CENTRAL DOUGLAS COUNTY, EASTERN CURRY COUNTY, JOSEPHINE COUNTY, THE EASTERN DOUGLAS COUNTY FOOTHILLS, AND JACKSON COUNTY.
• A HIGH SURF ADVISORY IS IN EFFECT FROM 4 PM THIS AFTERNOON UNTIL 10 AM THURSDAY FOR THE SOUTH CENTRAL OREGON COAST AND THE CURRY COUNTY COAST.

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

• Rain and warmer today (0.50 in. of rain possible) and breezy (Wind: SE 5-15 mph increasing and shifting to S 15-30 mph) rain chances decreasing late this afternoon, a (40%) chance of evening rain, rain (0.75 in. of rain possible) tonight and windy (Wind: S 20-30 mph gusts to 45 mph),
• Mostly cloudy with AM rain, a good (50%) chance of showers Thursday afternoon (0.25 in. of rain possible) and a bit cooler, a (40%) chance of evening showers, partly cloudy with a slight (20%) chance of showers late Thursday night (under 0.10 in. of rain possible),
• Mostly cloudy with a good (50%) of rain and a bit cooler Friday afternoon, evening showers likely (70%), then a good (50%) chance of rain Friday night.
• highs 58-53 lows 45-40 warming back to 43 Friday night.
• Mostly cloudy with rain a bit cooler Saturday, showers likely (70%) Saturday night,
• Rain Sunday, then showers likely (70%) Sunday night through Tuesday.
• highs 50-54 lows 40-37. (seasonal averages high 55 low 36).

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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:

• Cloudy with rain this AM, a good (50%) chance of showers and warmer this afternoon (0.30 in. of rain possible), evening rain likely (70%), rain late tonight (0.25 in. of rain possible) and breezy (Wind: S 15-25 mph gusts to 40 mph),
• AM rain, rain likely (70%) and a bit cooler Thursday afternoon (0.25 in. of rain possible), a slight (20%) chance of evening showers, a (30%) chance of rain late at night (under 0.10 in. of rain possible),
• Mostly cloudy with rain likely (60%) and a bit cooler Friday, then showers likely (70%) at night.
• highs 62-57 lows 46-43.
• Mostly cloudy and a bit cooler with rain Saturday, rain likely (70%) Saturday night,
• Rain likely (70%) and a bit cooler Sunday, rain Sunday night,
• Mostly cloudy with rain likely (70%) Monday, then cloudy with a (40%) chance of showers Monday night and Tuesday.
• highs 53-50 warming to 56 Tuesday lows near 39. (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 this AM, a good (50%) chance of afternoon showers and very windy (Wind: S 25-40 mph at the shore while S 25-40 mph inland this afternoon) and warmer this afternoon (0.55 in. of rain possible), rain at night and very windy (Wind: S 35-50 mph at the shore decreasing and shifting to SW 15-25 mph late while S 25-35 mph inland decreasing and shifting to SW 15-20 mph inland late tonight),
• Mostly cloudy with coastal rain likely (70%) Thursday while inland AM rain likely (70%) and a bit cooler Thursday afternoon, a slight (20%) chance of evening showers, a good (50%) chance of rain late Thursday night,
• Mostly cloudy with rain likely (70%) Friday AM, rain in the afternoon, then showers likely (70%) Friday night.
• highs 60-57 lows 49-46.
• Mostly cloudy with rain and a bit cooler Saturday, rain likely (70%) Saturday night,
• Rain and a bit cooler Sunday and at night,
• Mostly cloudy with rain likely (60%) Monday, cloudy with a (40%) chance of showers Monday night,
• Then cloudy with a good (50%) chance of showers and a bit warmer Tuesday.
• highs 53-50 warming back to 53 Tuesday lows near 44. (seasonal averages high 54 low 41).

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Forecast for the Cascades in Lane County:

• AM rain and snow, a good (50%) chance of rain and just a bit warmer this afternoon (0.25 in. of rain possible, 1 in. of snow possible) and windy (Wind: S 10-15 mph gusts to 35 mph increasing to S 20-30 mph gusts to 45 mph this afternoon), a good (50%) chance of evening rain, rain late tonight and windy (Wind: S 20-30 mph decreasing to S 10-15 mph late tonight, gusts to 50 mph),
• Mostly cloudy with AM rain and snow, rain and snow showers and a bit cooler Thursday afternoon (0.50 in. of rain possible, 2-4 in. of snow possible), a good (50%) chance of rain and snow showers at night,
• Mostly cloudy with rain and snow and a bit cooler Friday afternoon, evening rain and snow showers likely (70%), then a (40%) chance of rain and snow  showers late Friday night.
• snow level 5,000 ft. rising to 7,000 ft. today, 7,000 ft. tonight, 5,000 ft. Thursday, 4,500 ft. Thursday night, 5,000 ft. Friday, then 4,000 ft. Friday night.
• highs 43-37 lows 32-28 warming to 30 Friday night.
• Mostly cloudy with rain and snow Saturday, rain and snow showers likely (70%)  Saturday night,
• Rain and snow likely (70%) Sunday, rain and snow showers likely (70%) Sunday night,
• Snow likely (70%) and a bit cooler Monday, snow likely (70%) at night,
• Then mostly cloudy with show showers  likely (70%) Tuesday.
• snow level 3,500 ft. Saturday, 4,000 ft. Saturday night, 3,500 ft. Sunday and Sunday night, 3,000 ft. Monday and Monday night, then 2,500 ft. Tuesday.
• highs 38-35 lows near 26.

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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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