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 elongated Upper Level Low Pressure Trough has moved through, but the high pressure behind it (Shaded “Arch” shape with blue arrows) is sending cold air down to us from Canada. The days 1-3 graphic shows a surface low and frontal system that moved Southward through the Pacific Northwest ushering in colder air. There will be some precipitation, but so far there shouldn’t be enough moisture to bring any more than just a light dusting of snow for the South Willamette Valley, if that much. The graphic for days 3-7 shows another frontal system that will be headed our way Friday into Saturday next week.  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 30 in the Good category measuring Particulate Matter.

Oakridge: The Air Quality Index is 24 in the Good category measuring Particulate Matter.

Cottage Grove: The Air Quality Index is 53 in the Moderate category measuring Particulate Matter.

Data courtesy of Lane Regional Air Protection Agency (LRAPA)

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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.

Data courtesy of Lane Regional Air Protection Agency (LRAPA)

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Advisories:

• A WINTER WEATHER ADVISORY IS IN EFFECT UNTIL 3 PM TODAY ABOVE 500 FT. FOR THE CURRY COUNTY COAST.
• A WINTER WEATHER ADVISORY IS IN EFFECT UNTIL 7 PM THIS EVENING FOR CENTRAL DOUGLAS COUNTY.
• A WINTER STORM WARNING IS IN EFFECT  THROUGH 7 PM THIS EVENING ABOVE 2,000 FT. FOR EASTERN CURRY COUNTY AND  JOSEPHINE COUNTY.
• A WINTER WEATHER ADVISORY IS IN EFFECT UNTIL 7 PM TODAY BELOW 2,000 FT. FOR EASTERN CURRY COUNTY AND JOSEPHINE COUNTY.
• A WINTER WEATHER ADVISORY IS IN EFFECT UNTIL 7 PM THIS EVENING  THE SOUTHERN OREGON CASCADES  AND THE SISKIYOU MOUNTAINS.
• 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:

• Patchy AM freezing fog, a mix of clouds and sun and a bit cooler with a slight (20%) chance of snow showers this afternoon (under 0.10 in. of rain possible), partly cloudy and cold with a slight (20%) chance of snow showers tonight,
• Just partly cloudy and a bit warmer Tuesday, a slight (20%) chance of snow showers and cold Tuesday night,
• Mostly cloudy and a bit cooler with a good (50%) chance of snow Wednesday, then a slight (20%) chance of snow showers Wednesday night.
• highs near 33 lows 26-19.
• A mix of clouds and sun and a bit cooler with a slight (20%) chance of snow showers Thursday and Friday (a bit warmer), mostly cloudy with a slight (20%) chance of snow showers Thursday night, a slight (20%) chance of rain and snows Friday night,
• Mostly cloudy with a good (50%) chance of rain and snow and a bit cooler Saturday, then cloudy with a good (50%) chance of rain and a bit warmer Saturday night and Sunday.
• highs 30-38 cooling to 35 Saturday warming to 42 Sunday lows 25-34. (seasonal averages high 46 low 34)

 

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Forecast for Roseburg:

• Cloudy with a good (50%) chance of rain and snow showers and a bit cooler today (under 0.10 in. of rain possible, 1 in. of snow possible, snow level 300 ft.), mostly cloudy with a (30%) chance of rain and snow showers tonight (under 0.10 in. of rain possible, snow level 500 ft.),
• Mostly cloudy with a (30%) chance of rain and snow showers and a bit warmer Tuesday (under 0.10 in. of rain possible, snow level 200 ft.), a (30%) chance of evening rain and snow showers, a (30%) chance of rain and snow showers and a slight (20%) chance of freezing rain late Tuesday night (under 0.10 in. of rain possible),
• Mostly cloudy with rain, snow likely (70%) and a slight (20%) chance of freezing rain Wednesday AM, rain and snow likely (70%) and a bit warmer in the afternoon, mostly cloudy with a (30%) chance of rain and snow showers Wednesday night.
• highs 37-42 lows 26-32 cooling to 29 Wednesday night.
• Mostly cloudy with a (40%) chance of rain and snow showers and a bit cooler Thursday and Thursday night,
• A slight  (20%) chance of rain and snow showers and a bit warmer Friday, a (30%) chance of rain and snow at night,
• Mostly cloudy with rain and snow likely (70%) and a bit warmer Saturday and Saturday night,
• Then rain likely (70%) and a slight bit warmer Sunday.
• highs 38-45 lows 33-38. (seasonal averages high 48 low 36)

 

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

• Cloudy with coastal showers likely (70%) this AM while AM inland rain and snow showers likely (70%) and a good (50%) chance of rain and snow showers and a bit cooler this afternoon (under 0.10 in. of rain possible, 1 in. of snow possible, snow level 600 ft.), mostly cloudy with a (40%) chance of evening coastal showers and a good (50%) chance of rain and snow showers late tonight while a (40%) chance of inland rain and snow showers and a bit cooler tonight (0.10 in. of rain possible, snow level 800 ft. falling to 300 ft. late tonight),
• Mostly cloudy with a (30%) chance of AM coastal rain and snow showers while mostly cloudy and a bit warmer Tuesday afternoon with a (30%) chance of inland rain and snow showers, a (30%) chance of evening coastal showers and a (30%) chance of showers and a slight (20%) chance of freezing rain late at night while a (30%) chance of inland showers, snow showers and a slight (20%) chance of freezing rain inland Tuesday night (0.10 in. of rain possible, snow level 1,000 ft.),
• Mostly cloudy with AM rain and snow likely (70%), rain likely (70%) Wednesday afternoon, then mostly cloudy with a (30%) chance of showers at night.
• highs 42-45 lows near 33.
• Mostly cloudy with a slight (20%) chance of showers Thursday through Friday, a (40%) chance of rain Friday night,
• Mostly cloudy with rain likely (70%) and a bit warmer Saturday and Saturday night,
• Then mostly cloudy with rain Sunday.
• highs 45-50 lows 37-42. (seasonal averages high 51 low 40)

 

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Forecast for the Cascades in Lane County:

• Mostly cloudy and cooler with a good (50%) chance of snow showers today and tonight,
• A slight (20%) chance of AM snow showers, a mix of clouds and sun and a bit cooler with a (40%) chance of snow showers Tuesday afternoon, mostly cloudy with a good (50%) chance of snow showers in the evening, snow showers likely (70%) and cold late Tuesday night,
• Mostly cloudy with AM snow likely (70%) Wednesday, a good (50%) chance of `snow and a bit warmer in the afternoon, then mostly cloudy with a good (50%) chance of snow showers Wednesday night.
• snow level at the surface today through Wednesday night.
• highs 22-25 cooling back to 22 Wednesday lows 13-18 cooling to 8 Wednesday night.
• Mostly cloudy with with a slight (20%) chance of snow showers Thursday and at night,
• A mix of clouds and sun and a bit warmer with a slight (20%) chance of snow showers Friday, mostly cloudy with a (30%) chance of snow showers Friday night,
• Mostly cloudy with a good (50%) chance of snow Saturday and at night,
• Then snow likely (70%) with a good (50%) chance of rain Sunday.
• snow level at the surface Thursday through Saturday night, then 4,500 ft. Sunday.
• highs 18-32 lows 13-22.

 

 

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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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