Here is my new weekly weather quiz question. What is an “Observation Well?”  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.

________________

An upper level ridge of high pressure (Shaded “Arch” shape with blue arrows) has taken over to keep the rain away from us, but not much if any sunshine if the fog and clouds don’t clear.  Looks like dry weather through early this week. Wednesday a frontal system is poised to move in which could bring the rain back by Wednesday night. Here is another frontal system shown offshore Friday morning which means more showery weather.

________________

Air Quality Index:

Eugene-Springfield: The Air Quality Index is 40 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 15 in the Good category measuring Particulate Matter.

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

________________

Advisories:

• A DENSE FOG ADVISORY IS IN EFFECT UNTIL NOON TODAY FOR THE SOUTH WILLAMETTE VALLEY.

________________

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

• Mostly cloudy with areas of dense fog this AM, mostly cloudy early this afternoon, breaking out to a mix of clouds and sun and warmer with patchy afternoon lingering fog, partly cloudy this evening, areas of fog late tonight,
• Cloudy with areas of AM fog Tuesday, partly cloudy and a bit warmer with patchy lingering fog in the afternoon, cloudy with areas of fog Tuesday night,
• Mostly cloudy with areas of fog Wednesday AM, a mix of clouds and sun and a bit warmer in the afternoon, then just mostly cloudy Wednesday night.
• highs 54-60 lows 39-44.
• A mix of clouds and sun Thursday, becoming mostly cloudy with a slight (20%) chance of rain Thursday night,
• Mostly cloudy with a good (50%) chance of rain and a bit cooler Friday, rain becoming likely (70%) at night,
• A bit cooler with a (40%) chance of showers Saturday and Saturday night,
• Then mostly cloudy with a good (50%) chance of rain Sunday.
• high 58-52 lows 44-40. (seasonal averages high 50 low 35)

_____

Home Wood Heating Advisory:

Eugene-Springfield: YELLOW – Caution is Advised.

Oakridge: GREEN – Burning Wood 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:

• Partly cloudy with areas of AM fog, sunny and a bit warmer this afternoon with patchy lingering fog, clear this evening, partly cloudy with patchy fog late tonight and Tuesday AM, sunny with patchy lingering afternoon fog, mostly clear and colder with patchy fog late at night,
• Partly cloudy with areas of AM fog Wednesday, then mostly cloudy Wednesday night.
• highs 62-64 lows near 44.
• Mostly cloudy and a bit cooler Thursday, cloudy with a slight (20%) chance of showers at night,
• Mostly cloudy with rain Friday, a (30%) chance of showers Friday night and Saturday, then mostly cloudy with a (30%) chance of rain Saturday night and Sunday.
• highs 62-54 lows 47-42. (seasonal averages high 52 low 37)

________________

Forecast for The South Oregon Coast Including Coos Bay and North Bend:

• Sunny and cooler today and Tuesday, clear both nights,
• Partly cloudy and a bit cooler Wednesday, then becoming mostly cloudy Wednesday night.
• highs 70-59 lows near 49.
• Mostly cloudy Thursday, cloudy with a (30%) chance of rain Thursday night,
• Rain and a bit cooler Friday, mostly cloudy with a (40%) chance of showers Friday night and Saturday, then mostly cloudy with a good (50%) chance of rain Saturday night and Sunday.
• highs 60-53 lows 50-45. (seasonal averages high 52 low 40).

________________

Forecast for the Cascades in Lane County:

• Sunny and a bit warmer today and Tuesday, clear both nights,
• Mostly sunny Wednesday AM, a mix of clouds and sun and a bit cooler in the afternoon, then partly cloudy Wednesday night.
• free air freezing level 13,000 ft. today through Tuesday, 11,000 ft. Tuesday night, then 10,000 ft. Wednesday and Wednesday night.
• highs 46-50 cooling to 46 Wednesday lows 29-35.
• A mix of clouds and sun and a bit cooler Thursday, becoming mostly cloudy with a slight (20%) chance of rain at night,
• Cloudy and cooler Friday with a good (50%) chance of rain, rain and snow likely (70%) Friday night,
• Mostly cloudy and a bit cooler with a good (50%) chance of rain and snow showers Saturday, a (40%) chance of rain and snow showers at night,
• Then mostly cloudy and a bit warmer with a good (50%) chance of rain and snow Sunday.
• free air freezing level 10,000 ft. Thursday, snow level  8,000 ft. Thursday night, 7,500 ft. Friday, 5,500 ft. Friday night, 4,500 ft. Saturday and Saturday night, then 5,500 ft. Sunday.
• highs 47-37 warming to 42 Sunday lows 33-28.

________________

**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.

________________