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) continues to send frontal systems at us. A frontal system is moving into the Pacific Northwest bringing back the clouds and rain. A parade of storms is still out there. Another frontal system will slide into Oregon Thursday. Wait there is more! We will see another frontal system come through between Friday night and Saturday afternoon.

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Air Quality Index:

Eugene-Springfield: The Air Quality Index is 27 in the Good category measuring Particulate Matter.

Oakridge: The Air Quality Index is 18 in the Good category measuring Particulate Matter.

Cottage Grove: The Air Quality Index is 31 in the Good category measuring Particulate Matter.

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

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Advisories:

• A WINTER WEATHER ADVISORY IS IN EFFECT FROM NOON TUESDAY UNTIL 7AM WEDNESDAY FOR THE NORTHERN OREGON CASCADES, NOT INCLUDING THE CASCADES IN LANE COUNTY.
• A HIGH WIND WARNING IS IN EFFECT FROM 10 AM UNTIL 10 PM TUESDAY FOR NORTHERN AND EASTERN KLAMATH COUNTY, AND WESTERN, CENTRAL AND EASTERN LAKE COUNTY.
• A WINTER WEATHER ADVISORY IS IN EFFECT FROM 10 AM UNTIL 10 PM TUESDAY FOR THE SOUTH CENTRAL OREGON CASCADES, THE SOUTH OREGON CASCADES,  THE SISKIYOU MOUNTAINS, NORTHERN AND EASTERN KLAMATH COUNTY, AND WESTERN, CENTRAL AND EASTERN LAKE COUNTY.
• A FLOOD WARNING REMAINS IN EFFECT FOR THE COQUILLE RIVER AT COQUILLE AND THE ROGUE RIVER NEAR AGNESS.
• A HIGH SURF ADVISORY IS IN EFFECT UNTIL 10 AM TUESDAY  FOR THE SOUTH CENTRAL OREGON COAST AND THE CURRY COUNTY COAST.

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

• Mostly cloudy with rain tonight (0.50 in. of rain possible) and Tuesday AM, rain with a slight (20%) chance of thunderstorms in the afternoon (0.50 in. of rain possible, more in storms), showers with a slight (20%) chance of evening thunderstorms, a good (50%) chance of showers late at night (0.25 in. of rain possible, more in storms) and breezy (Wind: SW 15-25 mph gusts to 35 mph),
• Mostly cloudy with patchy fog and a slight (20%) chance of showers Wednesday AM, a slight (20%) chance of rain in the afternoon, then rain Wednesday night (0.20 in. of rain possible) through Thursday night.
• lows 44-40 warming back to 44 Wednesday night and Thursday night highs 48-54.
• Mostly cloudy with showers likely (70%) Friday and Friday night,
• Mostly cloudy and a bit warmer with showers likely (70%) Saturday, 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 43-37 warming to 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 rain tonight (0.20 in. of rain possible) and Tuesday AM, rain with a slight (20%) chance of thunderstorms in the afternoon (0.40 in. of rain possible), evening showers, a good (50%) chance of showers late at night (0.10 in. of rain possible),
• Mostly cloudy with a slight (20%) chance of rain Wednesday afternoon, cloudy with evening rain likely (70%), a (40%) chance of rain late Wednesday night,
• Cloudy and a bit warmer with a good (50%) chance of AM rain, rain in the afternoon, then rain, possibly heavy at times, Thursday night.
• lows 44-40 warming to 48 Wednesday night cooling to 44 Thursday night highs 50-54.
• Mostly cloudy with rain likely (70%) Friday, showers likely (70%) Friday night and Saturday, cloudy with a (30%) chance of showers Saturday night,
• Mostly cloudy with a good (50%) chance of rain Sunday and Sunday night,
• Then cloudy and a bit warmer with a good (50%) chance of rain Monday.
• highs 53-50 warming to 54 Monday lows 42-37 warming to 40 Sunday night. (seasonal averages high 50 low 37)

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

• Cloudy with rain tonight (0.45 in. of rain possible) and Tuesday AM, rain with isolated thunderstorms in the afternoon (0.65 in. of rain possible) and breezy (Wind: SW 15-25 mph), evening showers, a good (50%) chance of showers late Tuesday night (0.20 in. of rain possible),
• Mostly cloudy and a bit warm with a (40%) chance of coastal rain Wednesday while a (30%) chance of inland afternoon rain (under 0.10 in. of rain possible), coastal rain Wednesday night while inland evening rain and inland rain likely (70%) late Wednesday night (0.15 in. of rain possible),
• Mostly cloudy and a bit warmer with rain likely (70%) Thursday AM, rain in the afternoon, then rain possibly heavy at times, late Thursday night.
• lows 48-44 warming to 53 Wednesday night cooling to 47 Thursday night highs 52-56.
• Mostly cloudy with rain likely (70%) Friday, showers Friday night,
• Showers and a bit cooler Saturday, cloudy with a (40%) chance of showers Saturday night,
• Mostly cloudy with a (40%) chance of rain Sunday and Sunday night,
• Then cloudy and a bit warmer with a good (50%) chance of rain Monday.
• highs 55-52 warming back to 55 Monday lows 45-42 warming back to 45 Sunday night. (seasonal averages high 52 low 40).

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Forecast for the Cascades in Lane County:

• Mostly cloudy with rain and snow tonight (0.50 in. of rain possible, 1-3 in. of snow possible),
• Rain and snow Tuesday AM, rain, snow and a slight (20%) chance of thunderstorms Tuesday afternoon (0.50 in, of rain possible, more in storms, 3-5 in. of snow possible), rain and snow showers (0.50 in. of rain possible, 2-4 in. of snow possible) and colder Tuesday night and breezy (Wind: SW 15-25 mph gusts to 40 mph),
• Mostly cloudy with a (40%) chance of rain and snow showers Wednesday AM, a slight (20%) chance of rain and snow in the afternoon, then rain Wednesday night through Thursday night.
• snow level 5,000 tonight, 4,500 ft. Tuesday, 3,500 ft. Tuesday night and Wednesday, 7,500 ft. Wednesday night and Thursday, then 7,000 ft. Thursday night.
• lows 32-25 warming back to 32 Wednesday night cooling to near 3o Thursday night highs 34-42.
• Mostly cloudy with rain and snow showers likely (70%) Friday, rain and snow Friday night,
• Rain and snow showers likely (70%) Saturday, 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 6,500 ft. Friday, 5,000 ft. Friday night, 3,500 ft. Saturday, 2,500 ft. Saturday night and Sunday, 3,500 ft. Sunday night, then 5,000 ft. Monday.
• highs 37-30 warming back to 37 Monday lows 28-23 warming back to 28 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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