Here is my weekly weather quiz question for the last time. What is  a “Percolation Path?” Here is the correct answer. A Percolation Path: In hydrologic terms, the course followed by water moving or percolating through any other permeable material, or under a dam which rests upon a permeable foundation. 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 low pressure trough (Shaded “U” shape with blue arrows) still controls our weather and has kept the showers around as it sends another frontal system into Oregon. The parade of storms continues with this frontal system (position shown is Monday) as it moves in 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 tonight. 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 9 in the Good category measuring Particulate Matter.

Cottage Grove: The Air Quality Index is 11 in the Good category measuring Particulate Matter.

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

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Advisories:

• A HIGH WIND WATCH IS IN EFFECT FROM SUNDAY MORNING THROUGH SUNDAY EVENING FOR THE NORTH OREGON COAST, THE CENTRAL OREGON COAST, THE COAST RANGE OF NORTHWEST OREGON, THE CENTRAL COAST RANGE OF WESTERN OREGON, THE LOWER COLUMBIA, THE GREATER PORTLAND METRO AREA, THE CENTRAL WILLAMETTE VALLEY, THE SOUTH WILLAMETTE VALLEY, THE WESTERN COLUMBIA RIVER GORGE, THE CENTRAL COLUMBIA RIVER GORGE, THE OREGON CASCADE FOOTHILLS, THE CASCADE FOOTHILLS IN LANE COUNTY, THE NORTHERN OREGON CASCADES, AND THE CASCADES IN LANE COUNTY.
• A WINTER STORM WATCH IS IN EFFECT FROM SUNDAY AFTERNOON THROUGH MONDAY MORNING FOR THE NORTHERN OREGON CASCADES, THE CASCADES IN LANE COUNTY
• A FLOOD WATCH IS IN EFFECT THROUGH MONDAY MORNING FOR THE SOUTH CENTRAL OREGON COAST, THE CURRY COUNTY COAST, CENTRAL DOUGLAS COUNTY, EASTERN CURRY COUNTY, AND JOSEPHINE COUNTY.
• A HIGH SURF WARNING IS IN EFFECT FROM 5 AM SUNDAY UNTIL 5 AM MONDAY FOR THE SOUTH CENTRAL OREGON COAST AND THE CURRY COUNTY COAST.
• A HIGH WIND WATCH IS IN EFFECT FROM LATE TONIGHT THROUGH SUNDAY AFTERNOON FOR THE SOUTH CENTRAL OREGON COAST AND THE CURRY COUNTY COAST.
• A HIGH WIND WATCH IS IN EFFECT FROM SUNDAY MORNING THROUGH LATE SUNDAY NIGHT FOR THE KLAMATH BASIN, NORTHERN AND EASTERN KLAMATH COUNTY, AND CENTRAL, EASTERN AND WESTERN LAKE COUNTY.
• A WINTER STORM WARNING IS IN EFFECT UNTIL 11 PM MONDAY  FOR THE SOUTH CENTRAL OREGON CASCADES, THE SOUTHERN OREGON CASCADES AND THE SISKIYOU MOUNTAINS.
• A WIND ADVISORY IS IN EFFECT UNTIL 7 PM TODAY FOR THE KLAMATH BASIN, NORTHERN AND EASTERN KLAMATH COUNTY, AND CENTRAL, EASTERN AND WESTERN LAKE COUNTY.

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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 with small hail possible and a bit warmer today (0.25 in. of rain possible) and breezy (Wind: SW 15-25 mph gusts to 35 mph), evening showers with a slight (20%) chance of thunderstorms and small hail possible), rain late tonight (0.25 in. of rain possible),
• Mostly cloudy with rain, possibly heavy at times, Sunday (1.00 in. of rain possible) and windy (Wind: S 20-30 mph gusts to 50 mph), showers at night (0.30 in. of rain possible) and windy (Wind: SW 25-35 mph gusts to 50 mph decreasing to 10-20 mph late at night),
• Mostly cloudy with showers Monday, then showers likely (70%) at night.
• highs near 52-50 lows 42-39.
• Mostly cloudy and a bit warmer with showers likely (60%) Tuesday, a good (50%) chance of showers Tuesday night,
• Mostly cloudy and a bit warmer with a (40%) chance of showers Wednesday, just partly cloudy at night,
• Then mostly sunny and a bit warmer Thursday and Friday, partly cloudy Thursday night.
• highs 53-63 lows 40-37 warming back to 40 Thursday night. (seasonal averages high 56 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 and a bit cooler today (0.55 in. of rain possible, afternoon snow level 3,000 ft.), rain tonight (0.25 in. of rain possible, snow level 3,000 ft.),
• Mostly cloudy with rain Sunday (0.60 in. of rain possible) and breezy (Wind: SW 15-25 mph), evening showers, rain and snow showers late Sunday night (0.40 in. of rain possible, snow level 3,500 ft. falling to 2,500 ft.),
• Rain and snow showers Monday (snow level 2,500 ft,), showers likely (60%) Monday night.
• highs near 52 lows 44-40.
• Cloudy with a good (50%) chance of AM rain and snow showers, showers likely (70%) Tuesday afternoon, mostly cloudy with a (40%) chance of showers at night,
• Partly cloudy with a (30%) chance of AM rain, a slight (20%) chance of showers and a bit warmer Wednesday afternoon, just partly cloudy with patchy fog late Wednesday night,
• Then mostly cloudy with patchy mainly AM and late night fog and mostly sunny and a bit warmer Thursday and Friday, mostly clear Thursday night.
• highs 56-66 lows 40-36 warming back to 40 Friday. (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 and a bit cooler today with a slight (20%) chance of thunderstorms (0.80 in. of rain possible) and breezy (Wind: SW 15-25 mph), rain tonight (0.50 in. of rain possible) and breezy (Wind: SW 15-25 mph),
• Rain Sunday, heavy at times in the AM, (1.10 in. of rain possible) and windy (Wind: SW 25-35 mph decreasing to SW 15-25 mph late afternoon at the shore while SW 15-25 mph inland in the afternoon), showers Sunday night (0.60 in. of rain possible) and breezy (Wind: SW 20-25 gusts to 40 mph decreasing to SW 10-20 mph late Sunday night),
• Mostly cloudy with showers Monday, then showers likely (70%) Monday night.
• highs near 53 lows 45-43 warming back to 45 Monday night.
• Cloudy with showers likely (70%) and a bit warmer Tuesday, mostly cloudy with a (40%) chance of showers Tuesday night,
• Partly cloudy with a slight (20%) chance of rain in the AM, a slight (20%) chance of showers and a bit warmer Wednesday afternoon, just partly cloudy Wednesday night,
• Then mostly sunny and a bit warmer Thursday and Friday, mostly clear Thursday night.
• highs 54-62 lows 43-40 warming to 44 Thursday night. (seasonal averages high 54 low 41).

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Forecast for the Cascades in Lane County:

• Mostly cloudy with rain and snow showers and a bit cooler today (0.50 in. of rain possible, 3-6 in. of snow possible), evening rain and snow showers, rain and snow late tonight (0.50 in. of rain possible, 3-6 in. of snow possible),
• Rain and snow Sunday (1.00 in. of rain possible, 8-12 in. of snow possible) and windy (Wind: S 10-20 mph gusts to 50 mph increasing and shifting to SW 20-30 mph gusts to 6o mph on exposed ridges in the afternoon), rain and snow showers at night and windy (Wind: W 20-30 mph gusts to 45 mph),
• Mostly cloudy with rain and snow showers and a bit cooler Monday and Monday night.
• snow level 4,000 ft. today, 3,000 ft. tonight, 4,000 ft. Sunday, 3,000 ft. Sunday night, 2,500 ft. Monday, then 3,000 ft. Monday night.
• highs 38-34 lows 28-24.
• Mostly cloudy with rain and snow showers likely (60%) and a bit cooler Tuesday, a good (50%) chance of rain and snow showers at night,
• Mostly cloudy and a bit warmer with a (30%) chance of rain and snow showers Wednesday,  just partly cloudy Wednesday night,
• Then mostly sunny and warmer Thursday and Friday, partly cloudy Thursday night.
• snow level 3,500 ft. Tuesday, 4,500 ft. Tuesday night, 5,500 ft. Wednesday, free air freezing level 7,000 ft. Wednesday night and Thursday, 9,000 ft. Thursday night, then 10,000 ft. Friday.
• highs 35-47 lows 25-30.

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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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