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 sent another frontal system into Oregon. The warm front pushed Wednesday and the cold front followed today. There’s still a chance of a thunderstorm this afternoon.  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 18 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 18 in the Good category measuring Particulate Matter.

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

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Advisories: None At This Time.

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

• A mix of clouds and sun with  good (50%) chance of showers, a bit cooler with a slight (20%) chance of a thunderstorm this afternoon (0.10 in. of rain possible), partly cloudy with a slight (20%) chance of showers late tonight (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, showers likely (70%) in the evening, then  rain Saturday night.
• highs 56-50 lows 38-42 cooling to 40 Saturday night.
• 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 showers likely (70%) and a bit cooler this afternoon (0.25 in. of rain possible), partly cloudy with a slight (20%) chance of evening showers, a slight (20%) chance of rain late tonight (under 0.10 in. of rain possible),
• Mostly cloudy with a (40%) chance of 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, just cloudy at night,
• Mostly cloudy with rain and a bit cooler Saturday afternoon, evening showers then rain late Saturday night.
• highs 62-54 lows 42-40.
• 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, mostly cloudy with a (40%) chance of showers Tuesday night,
• Then mostly cloudy with a slight (20%) chance of showers and a bit warmer Wednesday .
• 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 and a bit cooler with coastal afternoon showers likely (70%) while a good (50%) chance of inland showers this afternoon (0.25 in. of rain possible), partly cloudy with a slight (20%) chance of evening showers, a slight (20%) chance of rain late tonight,
• Mostly cloudy with a good (50%) chance of coastal 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 at night while a good (50%) chance of inland rain late Friday night (0.30 in. of rain possible),
• Mostly cloudy with rain and a bit cooler Saturday afternoon and breezy (Wind: S 15-25 mph at the shore while S 10-15 mph inland), showers in the evening, then rain likely (70%) late Saturday night.
• highs 58-53 lows near 45.
• 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 (40%) chance of showers Tuesday night,
• Then mostly cloudy with a slight (20%) chance of showers 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 rain and snow showers likely (70%) and a bit cooler this afternoon (0.25 in. of rain possible, 2 in. of snow possible), partly cloudy increasing to mostly cloudy with a (40%) chance of rain and snow showers tonight,
• Rain and snow at times and a bit cooler Friday (0.25 in. of rain possible, 2-3 in. of snow possible, 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, evening rain and snow showers, then rain and snow likely (70%)  Saturday night.
• snow level 4,500 ft. today and tonight,m 5,000 ft. Friday, 5,500 ft. falling to 4,000 ft. Friday night, 4,000 ft. Saturday, then 3,500 ft. Saturday night.
• highs 40-36 lows 29-26.
• Mostly cloudy with rain and snow Sunday, rain and snow showers at night,
• Rain and snow likely (70%) Monday, rain and snow showers likely (70%) Monday night and 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 slight (20%) chance of rain and snow showers Wednesday.
• snow level 3,500 ft. Sunday, 4,500 ft. Sunday night, 3,000 ft. Monday, 2,500 ft. Monday night, 3,000 ft. Tuesday and Tuesday night, then 3,500 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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