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 Wednesday night 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.

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Air Quality Index:

Eugene-Springfield: The Air Quality Index is 9 in the Good category measuring Particulate Matter.

Oakridge: The Air Quality Index is 5 in the Good category measuring Particulate Matter.

Cottage Grove: The Air Quality Index is 10 in the Good category measuring Particulate Matter.

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

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Advisories:

• A BEACH HAZARDS STATEMENT IS IN EFFECT UNTIL 8 PM TONIGHT FOR THE SOUTH CENTRAL OREGON COAST AND THE CURRY COUNTY COAST. THIS MEANS THAT RIP CURRENTS, LONGSHORE CURRENTS, SNEAKER WAVES, AND OTHER HAZARDS CREATE LIFE-THREATENING CONDITIONS IN THE SURF ZONE. CAUTION SHOULD BE USED WHEN IN OR NEAR THE WATER.

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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 and thunderstorms this evening, a slight (20%) chance of showers tonight, patchy fog late tonight (under 0.10 in. of rain possible),
• Patchy AM fog and a slight (20%) chance of rain, increasing clouds to mostly cloudy with rain and a bit cooler Tuesday afternoon (0.25 in. of rain possible), rain likely (70%) in the evening, a good (50%) chance of rain at night (0.10 in. of rain possible),
• Mostly cloudy with rain and a bit warmer Wednesday (0.30 in. of rain possible), evening rain likely (70%), rain, possibly heavy at times, late at night (0.45 in. of rain possible),
• Mostly cloudy with rain and a bit warmer Thursday, then rain likely (60%) Thursday night.
• lows 36-45 cooling to 43 Thursday night highs 48-56.
• Mostly cloudy with showers likely (70%) and a bit cooler Friday and at night,
• Rain likely (60%) Saturday, showers likely (70%) Saturday night,
• Mostly cloudy with rain likely (70%) Sunday, then showers likely (70%) Sunday night and Monday.
• highs near 55 lows near 43. (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:

• Mostly cloudy with a slight (20%) chance of evening showers (under 0.10 in. of rain possible, snow level 3,000 ft.), just mostly cloudy late tonight,
• Mostly cloudy with patchy fog and a slight (20%) chance of AM rain, rain and snow and a bit cooler Tuesday afternoon (0.10 in. of rain possible, snow level 2,500 ft.), cloudy with a good (50%) chance of evening rain, rain likely (70%) late Tuesday night (0.10 in. of rain possible),
• Rain and warmer Wednesday (0.30 in. of rain possible), a good (50%) chance of evening rain, then rain late Wednesday night (0.35 in. of rain possible) through Thursday night.
• lows 34-46 cooling to 43 Thursday night highs 50-60 cooling to 58 Thursday.
• Mostly cloudy with rain and a bit cooler Friday, rain likely (70%) at night,
• Mostly cloudy with rain Saturday and Saturday night,
• Cloudy with rain likely (70%) Sunday and Sunday night,
• AM rain and snow showers likely (70%), then showers likely (70%) Monday afternoon.
• highs near 57 lows near 43. (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 evening showers, just mostly cloudy inland late tonight,
• Mostly cloudy with patchy fog and a slight (20%) chance of AM rain Tuesday, rain and a bit cooler in the afternoon, cloudy with a good (50%) chance of evening rain, rain late Tuesday night (0.10 in. of rain possible),
• Rain and windy (Wind: SE 10-15 mph increasing and shifting to S 10-15 mph shifting and increasing to  S 20-30 mph the afternoon at the shore while S 10-15 mph inland) and warmer Wednesday (0.55 in. of rain possible), rain at night (0.80 in. of rain possible) and very windy (Wind: S 25-40 mph decreasing and shifting to SW 20-30 mph late while S 20-30 mph shifting and decreasing to SW 10-20 mph late Wednesday night),
• Then mostly cloudy with rain a bit cooler Thursday and Thursday night.
• lows 40-49 cooling to 47 Thursday night highs 52-62 cooling to 58 Thursday
• Mostly cloudy with rain Friday, rain likely (70%) Friday night,
• Rain Saturday through Sunday night,
• Then mostly cloudy with showers likely (60%) Monday.
• highs near 56 lows near 46. (seasonal averages high 54 low 41).

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Forecast for the Cascades in Lane County:

• Mostly cloudy with a good (50%) chance of evening rain and snow showers (under 0.10 in. of rain possible), just partly cloudy late tonight,
• A mix of clouds and sun Tuesday AM, increasing clouds with rain and snow in the afternoon (0.25 in. of rain possible, 1-3 in. of snow possible), mostly cloudy with evening rain and snow, a good (50%) chance of rain and snow late at night (0.10 in. of rain possible, 2 in. of snow possible),
• AM rain and snow, rain and just a bit warmer Wednesday afternoon, rain Wednesday night,
• Mostly cloudy with rain and snow and a bit cooler Thursday, then rain and snow likely (70%) at night.
• snow level 3,500 ft. tonight, 2,500 ft. Tuesday, 4,000 ft. Tuesday night, 5,000 ft. rising to 7,000 ft. Wednesday, 6,000 ft. Wednesday night, then 5,500 ft. Thursday and Thursday night.
• lows 20-32 highs 37-46 cooling to 44 Thursday.
• Mostly cloudy with rain and snow showers likely (70%) and a bit cooler Friday, a good (50%) chance of  rain and snow showers Friday night,
• Rain and snow likely (70%) Saturday, rain and snow showers Saturday night,
• Mostly cloudy with rain and snow likely (70%) and a bit cooler Sunday, then rain and snow showers likely (70%) Sunday night and Monday (a bit cooler).
• snow level 5,000 ft. Friday, 4,000 ft. Friday night and Saturday, 4,500 ft. Saturday night, 3,000 ft. Sunday, 3,500 ft. Sunday night, then 3,000 ft. Monday.
• highs 42-39 lows near 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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