Here is my new weekly weather quiz question. What is the “NAO Index?”  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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A large upper level low (Shaded U shape with blue arrows) is moving away allowing high pressure (Shaded “Arch” shape with blue arrows) to try to take over, but that won’t last very long. A frontal system is moving through the Pacific Northwest bringing continuing the rainfall. The high gives us a little break Wednesday, but a parade of storms is still out there. Another frontal system (position shown is Friday) will slide into Oregon Thursday. Wait there is more! We will see another frontal system (position shown is Saturday) come through between Friday night and Saturday afternoon.

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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 13 in the Good category measuring Particulate Matter.

Cottage Grove: The Air Quality Index is 13 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 7 AM WEDNESDAY FOR NORTHERN AND EASTERN KLAMATH COUNTY, AND WESTERN, CENTRAL AND EASTERN LAKE COUNTY.
  A WINTER WEATHER ADVISORY IS IN EFFECT UNTIL 7AM WEDNESDAY FOR THE NORTHERN OREGON CASCADES AND THE CASCADES IN LANE COUNTY.
• A WINTER WEATHER ADVISORY IS IN EFFECT UNTIL 4 AM WEDNESDAY FOR THE CASCADES IN LANE COUNTY.
• A WINTER WEATHER ADVISORY IS IN EFFECT UNTIL 7 AM WEDNESDAY FOR THE NORTH OREGON CASCADES.
• A WINTER WEATHER ADVISORY IS IN EFFECT UNTIL 10 PM TONIGHT FOR THE SOUTH CENTRAL OREGON CASCADES, THE SOUTHERN OREGON CASCADES, THE SISKIYOU MOUNTAINS, NORTHERN AND EASTERN KLAMATH COUNTY, AND CENTRAL, EASTERN, AND WESTERN LAKE COUNTY.
• A HIGH WIND WARNING IS IN EFFECT UNTIL 10 PM TONIGHT FOR CENTRAL AND EASTERN LAKE COUNTY.
• A WIND ADVISORY IS IN EFFECT UNTIL 10 PM TONIGHT NORTHERN AND EASTERN KLAMATH COUNTY, AND WESTERN LAKE COUNTY.
• A FLOOD WARNING REMAINS IN EFFECT FOR THE COQUILLE RIVER AT COQUILLE.

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

• Mostly cloudy with showers and possible small hail and a slight (20%) chance of evening thunderstorms, showers likely (70%) with patchy fog late tonight (0.25 in. of rain possible, more in storms),
• Patchy AM fog,  just mostly cloudy Wednesday, increasing clouds to mostly cloudy with rain Wednesday night (0.25 in. of rain possible),
• Mostly cloudy and a bit warmer with rain likely (70%) Thursday (under 0.10 in. of rain possible), rain at night (0.40 in. of rain possible),
• Cloudy with AM rain, a good (50%) chance of showers and a bit cooler Friday afternoon, then rain Friday night.
• lows 40-45 cooling back to 40 Friday night highs 48-55 cooling to near 50 Friday.
• Mostly cloudy and a bit cooler with showers likely (70%) Saturday, a slight (20%) chance of showers Saturday night,
• A mix of clouds and sun and just a bit cooler Sunday, becoming mostly cloudy with a slight (20%) chance of showers at night,
• Cloudy with a good (50%) chance of rain Monday, then rain likely (70%) Monday night and Tuesday.
• highs 48-46 warming to near 50 Tuesday lows 38-36 warming to near 44 Monday night. (seasonal averages high 48 low 34)

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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 evening showers, a good (50%) chance of showers late tonight (0.10 in. of rain possible, snow level 3,000 ft. late tonight),
• Partly cloudy with a slight (20%) chance of rain Wednesday AM, mostly cloudy with a slight (20%) chance of afternoon rain (under 0.10 in. of rain possible), rain Wednesday night (under 0.10 in. of rain possible),
• Cloudy with AM rain likely (70%), a bit warmer with a good (50%) chance of rain Thursday afternoon (under 0.10 in. of rain possible), evening rain likely (70%), rain Thursday night (0.30 in. of rain possible) and Friday, evening rain likely (70%), then rain late Friday night.
• lows 40-48 cooling to 42 Friday night highs 50-56 cooling to 53 Friday.
• Mostly cloudy with showers likely (60%) Saturday, a slight (20%) chance of showers at night,
• Just mostly cloudy Sunday and Sunday night,
• Mostly cloudy and a bit warmer with a good (50%) chance of rain Monday, cloudy with a good (50%) chance of rain at night,
• Then rain likely (70%) and just a bit warmer Tuesday.
• highs 50-55 lows 38-46. (seasonal averages high 50 low 37)

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Forecast for the South Oregon Coast including Coos Bay and North Bend:

• Mostly cloudy with evening showers, a good (50%) chance of showers late tonight (0.20 in. of rain possible),
• Partly cloudy Wednesday AM at the shore and mostly cloudy and a bit warmer with a (30%) chance of coastal rain in the afternoon while mostly cloudy with a (30%) chance of inland rain (under 0.10 in. of rain possible), rain Wednesday night (under 0.10 in. of rain possible),
• Mostly cloudy and a bit warmer with coastal rain Thursday while inland rain likely (70%) in the afternoon (0.10 in. of rain possible), then rain Thursday night (0.75 in. of rain possible) through Friday night.
• lows 43-53 cooling to 45 Friday night highs 52-58 cooling to 55 Friday.
• Mostly cloudy with showers likely (60%) and a bit cooler Saturday, a slight (20%) chance of showers Saturday night,
• Just mostly cloudy Sunday and Sunday night,
• Cloudy and a bit warmer with a good (50%) chance of rain Monday and Monday night,
• Then mostly cloudy with rain likely (60%) Tuesday.
• highs 52-56 lows 43-50. (seasonal averages high 52 low 40).

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Forecast for the Cascades in Lane County:

• Mostly cloudy and breezy (Wind: SW 15-25 mph gusts to 35 mph) with showers and small hail possible this evening, rain and snow showers (0.50 in. of rain possible, 3-6 in. of snow possible) and colder late tonight,
• Mostly cloudy with a slight (20%) chance of snow showers Wednesday AM, just mostly cloudy in the afternoon, evening rain and snow, rain late Wednesday night (0.25 in. of rain possible, 1 in. of snow possible),
• Rain likely (70%) and just a bit warmer Thursday, rain at night,
• Mostly cloudy with rain and snow Friday AM, rain and snow showers in the afternoon, then rain and snow Friday night.
• snow level 4,000 ft. falling to 3,000 ft. late tonight, 2,500 ft. Wednesday AM, 6,000 ft. rising to 8,000 ft. Wednesday night, 8,000 ft. Thursday, 7,000 ft. Thursday night, 5,500 ft. Friday, then 5,000 ft. Friday night.
• lows 25-33 cooling to near 28 Friday night highs 35-42 cooling to 37 Friday.
• Mostly cloudy with rain and snow showers Saturday, a (40%) chance of rain and snow showers at night,
• A mix of clouds and sun Sunday, becoming mostly cloudy with a slight (20%) chance of rain and snow showers at night,
• Cloudy and a bit warmer with a (40%) chance of rain and snow Monday, cloudy with a good (50%) chance of rain Monday night,
• Then mostly cloudy and a bit warmer with rain Tuesday.
• snow level 4,000 ft. Saturday, 3,500 ft. Saturday night, free air freezing level at the surface Sunday, snow level 3,500 ft. Sunday night, 5,500 ft. Monday, 7.500 ft. Monday night, then 7,000 ft. Tuesday.
• highs 32-39 lows 22-35.

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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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