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 more rain today. The high gives us a 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 28 in the Good category measuring Particulate Matter.

Oakridge: The Air Quality Index is 33 in the Good category measuring Particulate Matter.

Cottage Grove: The Air Quality Index is 27 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 10 PM TONIGHT 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 10 PM TODAY FOR THE SOUTH CENTRAL OREGON CASCADES, THE SOUTHERN OREGON CASCADES,  THE SISKIYOU MOUNTAINS, NORTHERN AND EASTERN KLAMATH COUNTY, AND WESTERN, CENTRAL AND EASTERN LAKE COUNTY.
• A WIND ADVISORY IS IN EFFECT UNTIL 4 PM TODAY FOR JACKSON 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 rain changing to showers late this afternoon (0.50 in. of rain possible, more in storms), showers with patchy fog late tonight (0.25 in. of rain possible) and breezy (Wind: SW 15-25 mph),
• Patchy AM fog and just mostly cloudy Wednesday, increasing clouds to mostly cloudy with rain Wednesday night (0.20 in. of rain possible),
• Mostly cloudy with rain likely (70%) Thursday, then ran at night.
• highs 50-48 warming to 54 Thursday lows 40-44.
• AM showers, mostly cloudy with a good (50%) chance of showers Friday afternoon, rain Friday night,
• Mostly cloudy and a bit warmer with showers likely (70%) Saturday, mostly cloudy with a good (50%) chance of showers Saturday night,
• Mostly cloudy with a (40%) chance of showers Sunday, a (40%) chance of rain at night,
• Then cloudy with a good (50%) chance of rain Monday.
• highs 52-47 warming to 50 Monday lows 42-37 warming to near 40 Sunday 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 showers this afternoon (0.40 in. of rain possible), evening showers, a good (50%) chance of showers late tonight (0.10 in. of rain possible, snow level 3,000 ft. late tonight),
• Mostly cloudy with a slight (20%) chance of rain Wednesday, rain late Wednesday night,
• Cloudy and a bit warmer with a good (50%) chance of rain Thursday, then rain, possibly heavy at times, Thursday night.
• highs 50-56 cooling to 53 Friday lows 40-48 cooling to 42 Thursday night.
• Mostly cloudy with rain Friday, rain likely (70%) in the evening, rain late Friday night,
• Showers likely (70%) Saturday, mostly cloudy with a slight (20%) chance of showers at night,
• Just mostly cloudy Sunday and Sunday night,
• Then mostly cloudy and a bit warmer with a good (50%) chance of rain Monday.
• 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:

• Cloudy with showers this afternoon (0.65 in. of rain possible), mostly cloudy with evening showers  and becoming partly cloudy with a good (50%) chance of showers late tonight while evening showers inland and inland showers likely (70%) 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 (0.15 in. of rain possible),
• Mostly cloudy and a bit warmer with coastal rain Thursday while a (%) chance of AM rain inland and rain likely (70%) in the afternoon, then rain, possibly heavy at times, Thursday night.
• highs 52-58 cooling to 55 Friday lows 44-53 cooling to 45 Thursday night.
• Mostly cloudy with rain Friday and Friday night,
• Showers likely (70%) and a bit cooler Saturday, mostly cloudy with a slight (20%) chance of showers Saturday night,
• Just mostly cloudy Sunday and Sunday night,
• Then cloudy and a bit warmer with a good (50%) chance of rain Monday.
• 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 with rain and snow showers late this afternoon (0.75 in, of rain possible, 3-6 in. of snow possible), rain and snow showers (0.50 in. of rain possible, 3-6 in. of snow possible) and colder tonight and breezy (Wind: SW 15-25 mph gusts to 45 mph),
• Mostly cloudy with a slight (20%) chance of rain and snow showers Wednesday AM, just mostly cloudy in the afternoon, evening rain and snow likely (70%), rain late Wednesday night,
• Rain likely (70%) and just a bit warmer Thursday, then rain at night.
• snow level 4,500 ft. today, 4,000 ft. falling to 3,000 ft. late tonight, 2,500 ft. Wednesday AM, 6,000 ft. rising to 7,000 ft. Wednesday night, 7,500 ft. Thursday, then 7,000 ft. Thursday night.
• highs 34-42 lows 25-32 cooling to near 3o Thursday night.
• Mostly cloudy with rain and snow showers Friday, rain and snow Friday night,
• Rain and snow showers Saturday, mostly cloudy with a good (50%) chance of rain and snow showers at night,
• Mostly cloudy with a (40%) chance of snow showers Sunday, a (40%) chance of rain and snow at night,
• Then cloudy and a bit warmer with a good (50%) chance of rain and snow Monday.
• snow level 5,000 ft. Friday and Friday night, 3,500 ft. Saturday, 2,500 ft. Saturday night and Sunday, 3,500 ft. Sunday night, then 5,000 ft. Monday.
• highs 37-32 warming back to 37 Monday lows 27-23 warming back to 27 Sunday night.

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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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