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 has kept the showers around as it sent another frontal system into Oregon. The parade of storms continues with this frontal system Monday. Another cold front (shown well to our East) will have already pushed through. 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.  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:

• A WINTER STORM WATCH IS IN EFFECT FROM SATURDAY MORNING THROUGH MONDAY AFTERNOON FOR THE SOUTH CENTRAL OREGON CASCADES, THE SOUTHERN OREGON CASCADES AND THE SISKIYOU MOUNTAINS.

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

• Partly cloudy with a slight (20%) chance of showers this evening, increasing clouds late tonight (under 0.10 in. of rain possible),
• Cloudy with a slight (20%) of AM rain, mostly cloudy and a bit cooler with a good (50%) chance of rain Friday afternoon (0.10 in. of rain possible), showers likely (70%) Friday night (0.25 in. of rain possible),
• Mostly cloudy with rain a bit cooler Saturday (0.40 in. of rain possible), showers Saturday night (0.25 in. of rain possible),
• Mostly cloudy with rain, possibly heavy at times, Sunday afternoon, then rain at night.
• lows 40-43 cooling back to 40 Sunday night highs near 52.
• Mostly cloudy with rain Monday, showers likely (70%) at night,
• Cloudy and a bit warmer with a good (50%) chance of showers Tuesday, mostly cloudy with a (40%) chance of showers Tuesday night,
• Mostly cloudy and a bit warmer with a slight (20%) chance of showers Wednesday, then just partly cloudy Wednesday night and Thursday.
• highs 52-60 lows near 38. (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 a slight (20%) chance of evening rain, just mostly cloudy late tonight (under 0.10 in. of rain possible),
• a (40%) chance of AM rain, rain and a bit cooler Friday afternoon (0.15 in. of rain possible), rain likely (70%) at night (0.15 in. of rain possible),
• Mostly cloudy with rain and a bit cooler Saturday (0.50 in. of rain possible, afternoon snow level 3,500 ft.), rain Saturday night (snow level 3,500 ft.),
• Then mostly cloudy with rain and a bit warmer Sunday and Sunday night.
• lows 43-40 highs 57-53.
• Rain and a bit cooler Monday, showers likely (60%) Monday night,
• Cloudy with a good (50%) chance of showers Tuesday, mostly cloudy with a (40%) chance of showers Tuesday night,
• Mostly cloudy with a slight (20%) chance of showers and a bit warmer Wednesday, then just partly cloudy Wednesday night and Thursday.
• highs 53-63 lows 40-36. (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 a slight (20%) chance of inland rain late tonight,
• Mostly cloudy with a good (50%) chance of coastal rain Friday AM while inland AM rain likely (70%), rain (0.30 in. of rain possible) in the afternoon (0.15 in. of rain possible), evening rain likely (70%), rain late Friday night (0.30 in. of rain possible),
• Mostly cloudy with rain and a bit cooler Saturday (0.80 in. of rain possible)and breezy (Wind: SW 15-25 mph at the shore while S 10-15 mph inland), then rain Saturday night (0.40 in. of rain possible) through Sunday night.
• lows 45-47 cooling to 43 Sunday night highs 56-53.
• Mostly cloudy with rain Monday, showers likely (70%) Monday night,
• Cloudy with a good (50%) chance of showers Tuesday, mostly cloudy with a (40%) chance of showers Tuesday night,
• Mostly cloudy with a slight (20%) chance of showers and a bit warmer Wednesday, then just partly cloudy and a bit warmer Wednesday night and Thursday.
• highs 52-62 lows 42-45. (seasonal averages high 54 low 41).

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Forecast for the Cascades in Lane County:

• Mostly cloudy with a (40%) chance of rain and snow showers this evening, a slight (20%) chance of rain and snow showers tonight,
• Cloudy with AM rain and snow likely (70%), rain and a bit cooler Friday (0.10 in. of rain possible, 1 in. of snow possible), rain and snow showers likely (70%) Friday night,
• Mostly cloudy with rain and snow and a bit cooler Saturday, then rain and snow showers, Saturday night,
• Mostly cloudy with rain and snow Sunday, then rain and snow showers at night.
• snow level 5,000 ft. tonight, 5,500 ft. Friday and Friday night, 4,000 ft. Saturday, 3,500 ft. Saturday night, then 4,000 ft. Sunday and Sunday night.
• lows 30-26 highs 42-36.
• Mostly cloudy with rain and snow likely (70%) and a bit cooler Monday, snow showers likely (70%) Monday night,
• Rain and snow showers likely (70%) and a bit warmer Tuesday, a good (50%) chance of rain and snow showers at night,
• A mix of clouds and sun and a bit warmer with a slight (20%) chance of rain and snow showers Wednesday, then just partly cloudy Wednesday night and Thursday.
• snow level 3,000 ft. Monday through Tuesday, 3,500 ft. Tuesday night, then 4,500 ft. Wednesday, free air freezing level 7,000 ft. Wednesday night, then 9,000 ft. Thursday.
• highs 33-43 lows 24-28.

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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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