Here is my new weekly weather quiz question. What is an“Adiabatic Lapse Rate?” Please remember to post your answer at the bottom of this page. An email will not suffice. The first person to post the correct answer will win a week of free personalized weather forecasts tailored to your needs.  Good luck.

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An Upper level High (Shaded “Arch” shape with blue arrows) to our Northwest is sending cold air down to us from Canada. Low pressure to the South combines to return the moisture to Oregon by late Friday. The days 1-3 graphic shows  surface low and frontal system that is moving Southward along the Pacific Coast and then inland well to our South by Wednesday giving us the short break from the precipitation chances. The graphic for days 3-7 shows the break from storms Thursday and most of Friday. Then more frontal systems that will be headed our way late Friday into Saturday and again Monday.  For mountain snow conditions at the local ski areas check out their websites or give them a call.

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Air Quality Index:

Eugene-Springfield: The Air Quality Index is 25 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 25 in the Good category measuring Particulate Matter.

Data courtesy of Lane Regional Air Protection Agency (LRAPA)

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Home Wood Heating Advisory:

Eugene-Springfield: YELLOW – Caution is Advised.

Oakridge: YELLOW – Caution is Advised.

*Note: Pellet stoves may be used anytime if they produce no visible emissions.

Data courtesy of Lane Regional Air Protection Agency (LRAPA)

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Advisories:

• A WIND ADVISORY IS IN EFFECT UNTIL 4 PM TODAY FOR THE GREATER PORTLAND METRO AREA.
• A WINTER WEATHER ADVISORY IS IN EFFECT FROM 2 AM UNTIL 4 PM THIS AFTERNOON FOR THE SOUTH WILLAMETTE VALLEY AND THE NORTHERN OREGON CASCADES.
• A Permanent Health Advisory remains in effect for the South Umpqua River and Lawson Bar. Pools in the bedrock along the rivers edge are known to develop Blue-green Algae (cyanobacterial) blooms that can be harmful to pets and people if accidental ingestion occurs. Signs have been posted along several access areas along the river.

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

• Cloudy and a bit cooler with snow likely (70%) this afternoon (2 additional  in. of snow possible), a slight (20%) chance of evening snow, partly cloudy and cold with areas of freezing fog late tonight and Thursday AM, mostly sunny and a bit cooler in the afternoon, mostly clear and cold with areas of freezing fog late Thursday night,
• Partly cloudy with areas of AM freezing fog, mostly sunny and a bit cooler Friday afternoon, just partly cloudy Friday night.
• highs 33-28 warming to 30 Friday lows 10-24.
• Cloudy with a good (50%) AM freezing rain and snow, rain and snow likely (70%) with a (40%) chance of freezing rain and a bit warmer Saturday afternoon (snow level 1,000 ft.), rain and freezing rain likely (70%) Saturday night.
• Mostly cloudy with rain likely (70%) and a bit warmer Sunday, then rain likely (70%) Sunday night through Tuesday.
• highs near 42 lows near 36. (seasonal averages high 46 low 34)

 

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Forecast for Roseburg:

• Mostly cloudy with a good (50%) chance of rain and snow and a bit warmer this afternoon (under 0.10 in. of rain possible, 1 in. of additional snow possible, snow level 0 ft.), a slight (20%) chance of evening rain and snow showers, a partly cloudy late tonight (snow level 400 ft.),
• Partly cloudy in the AM, sunny and a bit cooler Thursday afternoon, mostly clear with patchy freezing fog late Thursday night and Friday AM, sunny and a bit warmer Friday afternoon, partly cloudy in the evening, then mostly cloudy with a slight (20%) chance of snow late at night,
• highs 42-34 warming to 39 Friday lows 22-30.
• Mostly cloudy with snow and a slight (20%) chance of freezing rain in the AM, rain and snow likely (70%) and a bit warmer Saturday, rain Saturday night through Sunday night,
• Cloudy with a good (50%) chance of rain and snow and a bit cooler Monday and at night,
• Then mostly cloudy with rain and snow likely (70%) Tuesday.
• highs 44-48 cooling to 45 Monday and Tuesday lows 40-37. (seasonal averages high 48 low 36)

 

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

• Mostly cloudy with a good (50%) chance of rain and snow and a bit warmer this afternoon (under 0.10 in. of rain possible, 1 in. of additional snow possible, snow level 200 ft.), a slight (20%) chance of evening coastal showers and partly cloudy late tonight while a slight (20%) chance of evening inland rain and snow showers and just mostly cloudy inland late tonight (evening snow level 700 ft.),
• Partly cloudy Thursday AM, sunny and a bit cooler in the afternoon, mostly clear in the evening, partly cloudy with patchy freezing fog late Thursday night and Friday AM, sunny and a bit warmer Friday afternoon, partly cloudy in the evening, then becoming mostly cloudy with a slight (20%)  chance of rain and light freezing rain late Friday night.
• highs 42-45 lows 25-35.
• Cloudy with a good (50%) chance of rain and a slight (20%) chance of light freezing rain Saturday AM, rain likely (70%) and a bit warmer in the afternoon, rain Saturday night through Sunday night,
• Mostly cloudy with a (40%) chance of  rain Monday, rain likely (70%) and breezy at night,
• Then rain and breezy Tuesday.
• highs 50-52 cooling to 49 Monday lows 44-40. (seasonal averages high 51 low 40)

 

 

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Forecast for the Cascades in Lane County:

• Cloudy with snow decreasing to a good (50%) chance of snow and a bit cooler late this afternoon (2 in. of snow possible), mostly cloudy with a good (50%) chance of evening snow, just mostly cloudy and cold late tonight,
• Mostly sunny in the AM, partly cloudy and a bit warmer Thursday afternoon, mostly clear and very cold Thursday night,
• Mostly sunny and a bit warmer Friday, then partly cloudy at night.
• snow level at the surface today through Wednesday night, then free air freezing level at the surface Thursday through Friday night.
• highs 18-25 lows 4 -11.
• Cloudy with a good (50%) chance of AM snow, snow likely (70%) and a bit warmer Saturday afternoon, rain and snow likely (70%) Saturday night,
• Mostly cloudy with rain and snow Sunday and at night,
• Rain and snow likely (70%) Monday, then snow likely (70%) Monday night and Tuesday.
• highs 29-32 lows 23-20.

 

 

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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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