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 is sending us another frontal system today. The parade of storms continues with this frontal system (position shown is Tuesday) as it moves toward us. Friday a cold front is poised over the Pacific Ocean to approach the coast. Note: Hope you didn’t forget that this is the weekend when Daylight Saving Time begins. Remember you were supposed to “Spring Forward” and turn your clocks ahead one hour at bedtime Saturday night. The official change occurred at 2:00 am today. The Fire Department reminds you to check the batteries in your smoke detectors, CO2 detectors and  Radon detectors if you have them. You still have “time” to make the change if you forgot.

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Air Quality Index:

Eugene-Springfield: The Air Quality Index is 7 in the Good category measuring Particulate Matter.

Oakridge: The Air Quality Index is 8 in the Good category measuring Particulate Matter.

Cottage Grove: The Air Quality Index is 12 in the Good category measuring Particulate Matter.

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

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Advisories:

• A HIGH WIND WARNING IS IN EFFECT UNTIL 6 PM  TODAY FOR THE NORTH OREGON COAST, THE CENTRAL OREGON COAST, THE COAST RANGE OF NORTHWEST OREGON, AND THE CENTRAL COAST RANGE OF WESTERN OREGON.
• A HIGH SURF ADVISORY IS IN EFFECT FROM 11 AM UNTIL 10 PM TODAY FOR THE NORTH OREGON COAST AND THE CENTRAL OREGON COAST.
• A WIND ADVISORY IS IN EFFECT FROM NOON UNTIL 6 PM TODAY FOR THE LOWER COLUMBIA, THE GREATER PORTLAND METRO AREA, THE CENTRAL WILLAMETTE VALLEY, AND THE SOUTH WILLAMETTE VALLEY,
• A WINTER WEATHER ADVISORY IS IN EFFECT UNTIL  NOON TODAY FOR THE NORTHERN OREGON CASCADES AND THE CASCADES IN LANE COUNTY.
• A WINTER STORM WARNING IS IN EFFECT FROM THIS AFTERNOON THROUGH MONDAY MORNING FOR THE NORTHERN OREGON CASCADES AND 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 UNTIL 5 AM MONDAY FOR THE SOUTH CENTRAL OREGON COAST AND THE CURRY COUNTY COAST.
• A HIGH WIND WARNING IS IN EFFECT UNTIL 5 PM TODAY FOR THE SOUTH CENTRAL OREGON COAST AND THE CURRY COUNTY COAST.
• 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 8 PM THIS EVENING FOR CENTRAL DOUGLAS COUNTY, EASTERN CURRY COUNTY, JOSEPHINE COUNTY, THE EASTERN DOUGLAS COUNTY FOOTHILLS, AND JACKSON COUNTY.
• A HIGH WIND WARNING IS IN EFFECT UNTIL 2 AM MONDAY FOR THE KLAMATH BASIN, NORTHERN AND EASTERN KLAMATH COUNTY, AND CENTRAL, EASTERN AND WESTERN LAKE COUNTY.
• A WINTER WEATHER ADVISORY IS IN EFFECT UNTIL5 PM MONDAY 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 rain this AM, showers this afternoon and evening (0.75 in. of rain possible) and windy (Wind: S 10-20 mph increasing and shifting SW 20-30 mph gusts to 40 mph this afternoon), showers tonight (0.50 in. of rain possible),
• Mostly cloudy with showers Monday (0.25 in. of rain possible) and at night (0.25 in. of rain possible),
• Cloudy and a bit warmer with a good (50%) chance of showers Tuesday, then mostly cloudy with a good (50%) chance of showers Tuesday night.
• highs near 53-55 lows near 40.
• A mix of clouds and sun and a bit warmer with a (30%) chance of showers Wednesday, just partly cloudy with patchy fog at night,
• Mostly sunny and a bit warmer Thursday and Friday, partly cloudy both nights,
• Then a mix of clouds and sun and a bit cooler with a (30%) chance of showers Saturday.
• highs 57-66 cooling to 62 Saturday lows 36-40. (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 today (0.75 in. of rain possible) and breezy (Wind: SW 15-25 mph gusts to 40 mph), evening showers, rain and snow showers late tonight (0.40 in. of rain possible, 1-2 in. of snow possible, snow level 3,500 ft. falling to 2,500 ft.),
• Rain and snow showers and a bit cooler Monday (0.40 in. of rain possible, snow level 2,500 ft,), evening showers likely (60%), rain and snow showers likely (70%) late Monday night (0.15 in. of rain possible),
• Cloudy with a good (50%) chance of AM rain and snow showers, a (40%) chance of rain and snow showers and a bit warmer Tuesday afternoon, then cloudy with a (40%) chance of showers at night.
• highs 53-50 warming to 54 Tuesday lows near 40.
• Partly cloudy with a (30%) chance of showers and a bit warmer Wednesday afternoon, just partly cloudy with patchy fog late Wednesday night,
• Patchy mainly AM and late night fog and mostly sunny and a bit warmer Thursday and Friday, mostly clear both nights,
• Then mostly cloudy and a bit cooler with a slight (20%) chance of showers Saturday.
• highs 60-68 cooling to 64 Saturday lows 39-42. (seasonal averages high 57 low 39).

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

• Coastal rain with a slight (20%) chance of thunderstorms this AM and rain this afternoon while rain inland, rain possibly heavy at times in the AM (1.10 in. of rain possible) and windy (Wind: SW 25-35 mph at the shore while SW 20-30 mph inland), showers tonight (0.50 in. of rain possible) and windy (Wind: SW 20-30 decreasing to SW 10-20 mph late tonight),
• Mostly cloudy with showers and a bit cooler Monday (0.40 in. of rain possible), coastal showers likely (70%) Monday night while evening showers likely (70%) inland and a good (50%) chance of inland showers late at night (0.15 in. of rain possible),
• Cloudy with a good (50%) chance of AM showers, showers likely (60%) and a bit warmer Tuesday afternoon, then cloudy with a (40%) chance of showers Tuesday night.
• highs 54-52 warming back to 54 Tuesday lows 43-45.
• Partly cloudy with a slight (20%) chance of showers and a bit warmer Wednesday, just partly cloudy Wednesday night,
• Mostly sunny and a bit warmer Thursday and Friday, mostly clear Thursday night, partly cloudy Friday night,
• Then mostly cloudy with a (30%) chance of showers and a bit cooler Saturday.
• highs 59-65 cooling back to 59 Saturday lows 43-46. (seasonal averages high 54 low 41).

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Forecast for the Cascades in Lane County:

• Rain and snow today (0.75 in. of rain possible, 5-9 in. of snow possible) and windy (Wind: S 10-20 mph gusts to 45 mph increasing and shifting to SW 20-30 mph gusts to 55 mph this afternoon), rain and snow showers tonight (0.50 in. of rain possible, 4-8 in. of snow possible) and breezy (Wind: W 15-25 mph gusts to 35 mph),
• Mostly cloudy with snow showers and a bit cooler Monday, rain and snow showers Monday night,
• Mostly cloudy with rain and snow showers likely (60%) Tuesday, then a good (50%) chance of rain and snow showers at night.
• snow level 4,000 ft. today, 3,000 ft. tonight, 2,500 ft. Monday, 3,000 ft. Monday night and Tuesday, then 3,500 ft. Tuesday night.
• highs 40-37 lows 23-25.
• A mix of clouds and sun and a bit warmer with a (40%) chance of rain and snow showers Wednesday, just partly cloudy Wednesday night,
• Then mostly sunny and a bit warmer Thursday and Friday, partly cloudy Thursday night,
• Then a mix of clouds and sun and a bit cooler with a (30%) chance of showers Saturday.
• snow level 4,000 ft. Wednesday, free air freezing level 7,500 ft. Wednesday night, 7,000 ft. Thursday, 9,000 ft. Thursday night, then 10,000 ft. Friday and Friday night, then snow level 7,000 ft. Saturday.
• highs 38-48 cooling to 46 Saturday lows 26-34.

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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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