Here is my new weekly weather quiz question. What is a “Nocturnal Inversion?” 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.

________________

There will be a short break from the rain as an upper level high pressure ridge dries us out for a day. Low pressure follows close behind returning the clouds Tuesday an another frontal system follows this one that moves through tonight and falls apart. Next week another frontal system will approach the Oregon coast Wednesday followed by yet another frontal system between Thursday night and Friday to keep the rain falling.

________________

Air Quality Index:

Eugene-Springfield: The Air Quality Index is 10 in the Good category measuring Particulate Matter.

Oakridge: The Air Quality Index is 15 in the Good category measuring Particulate Matter.

Cottage Grove: The Air Quality Index is 23 in the Good category measuring Particulate Matter.

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

________________

Advisories: None At This Time.

________________

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

• A mix of clouds and sun and a bit warmer this afternoon, partly cloudy this evening, becoming mostly cloudy late tonight,
• Mostly cloudy with a slight (20%) chance of rain Tuesday AM, a (40%) chance of rain in the afternoon (under 0.10 in. of rain possible), a good (50%) chance of evening rain, patchy fog with a slight (20%) chance of rain late at night (under 0.10 in. of rain possible),
• A mix of clouds and sun and a bit warmer with patchy fog Wednesday, then cloudy with a slight (20%) chance of evening rain, a good (50%) chance of rain late Wednesday night.
• highs 56-52 warming back to 56 Wednesday lows 42-49.
• Cloudy with rain Thursday and Thursday night,
• Mostly cloudy and a bit cooler with showers likely (70%) Friday, a (40%) chance of showers and a bit cooler Friday night and Saturday, then a good (50%) chance of showers Saturday night and Sunday.
• highs 55-47 lows 44-40. (seasonal averages high 48 low 35)

_____

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).

___________________

Forecast for Roseburg:

• Mostly sunny and a bit warmer this afternoon, partly cloudy this evening, increasing clouds to mostly cloudy with patchy fog late tonight,
• Mostly cloudy with patchy AM fog,  mostly cloudy with a slight (20%) chance of rain Tuesday afternoon, a (30%) chance of rain at night,
• Mostly cloudy with areas of fog and a slight (20%) chance of rain Wednesday AM, becoming partly cloudy and a bit warmer in the afternoon, then mostly cloudy with a (30%) chance of rain Wednesday night.
• highs 56-60 lows 42-49.
• Mostly cloudy with rain and a bit cooler Thursday and Thursday night,
• Showers and cooler Friday, cloudy with a good (50%) chance of showers at night,
• Showers likely (60%) and cooler Saturday, then mostly cloudy with a good (50%) chance of showers Saturday night and Sunday.
• highs 59-46 lows 46-38. (seasonal averages high 51 low 37)

________________

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

• Partly cloudy and a bit warmer this afternoon, mostly cloudy tonight with a slight (20%) chance of coastal showers Monday night,
• A (40%) chance of rain Tuesday (under o.10 in. of rain possible), partly cloudy with a slight (20%) chance of evening rain, increasing clouds to cloudy with a slight (20%) chance of rain Tuesday night (under o.10 in. of rain possible),
• Mostly cloudy with areas of fog and a slight (20%) chance of rain Wednesday AM, partly cloudy in the afternoon, then mostly cloudy with a good (50%) chance of rain Wednesday night.
• highs 58-60 lows 48-54.
• Mostly cloudy and a bit cooler with rain Thursday and Thursday night,
• Showers likely (60%) and a bit cooler Friday, cloudy with a good (50%) chance of showers Friday night,
• Mostly cloudy with showers likely (60%) and a bit cooler Saturday, then mostly cloudy with a good (50%) chance of showers and a bit cooler Saturday night and Sunday.
• highs 57-48 lows 49-42. (seasonal averages high 52 low 40).

________________

Forecast for the Cascades in Lane County:

• Mostly sunny and warmer this afternoon, partly cloudy this evening, becoming mostly cloudy late tonight,
• Mostly cloudy and a bit warmer with a slight (20%) chance of rain Tuesday afternoon, cloudy with a (40%) chance of evening rain, a slight (20%) chance of rain late Tuesday night,
• A mix of clouds and sun and a bit warmer Wednesday, then becoming mostly cloudy with a slight (20%) chance of rain at night.
• free air freezing level 7,000 ft. today, 8,000 ft. tonight, snow level 8,000 ft. Tuesday and Tuesday night, free air freezing level 9,000 ft. Wednesday, then snow level 8,000 ft. Wednesday night.
• highs 38-42 lows 27-36.
• Mostly cloudy and a bit warmer with rain Thursday and at night,
• Showers and a bit cooler Friday, cloudy with a good (50%) chance of rain and snow showers Friday night,
• Then mostly cloudy and a bit cooler with a good (50%) chance of rain and snow showers Saturday through Sunday.
• snow level 8,000 ft. Thursday, above 8,000 ft. Thursday night, 6,000 ft. Friday, 4,500 ft. Friday night, 5,000 ft. Saturday, 4,500 ft. Saturday night, then 4,000 ft. Sunday.
• highs 43-34 lows 32-27.

________________

**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.

________________

Get your local Eugene-Springfield and Lane County news on-line at eugenedailynews.com.

________________