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An upper level trough of low pressure (Shaded “U” shape with blue arrows) is returning with the jet stream flow coming right from the Pacific Ocean. The days 1-3 graphic shows the frontal system moving over the Pacific Northwest. The graphic for days 3-7 shows a series of frontal systems that will be keeping us in precipitation Friday and again Sunday. So far, the snow will stay in the mountains. 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 23 in the Good category measuring Particulate Matter.

Oakridge: The Air Quality Index is 57 in the Moderate 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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Home Wood Heating Advisory:

Eugene-Springfield: GREEN – Burning is Allowed.

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 WINTER STORM WARNING  IS IN EFFECT THROUGH MIDNIGHT TONIGHT FOR THE NORTHERN OREGON CASCADES AND THE CASCADES IN LANE COUNTY.
•  A HIGH WIND WARNING IS IN EFFECT UNTIL 4 AM WEDNESDAY FOR NORTHERN AND EASTERN KLAMATH COUNTY, AND WESTERN, CENTRAL, AND EASTERN LAKE COUNTY.
• A WINTER WEATHER ADVISORY IS IN EFFECT UNTIL MIDNIGHT TONIGHT FOR THE CASCADES IN LANE COUNTY.
• A WINTER WEATHER ADVISORY IS IN EFFECT UNTIL 4 AM WEDNESDAY FOR THE SOUTH CENTRAL OREGON CASCADES, 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:

• Mostly cloudy with showers and a bit warmer this afternoon (0.25 in. of rain possible), cloudy with a good (50%) chance of showers tonight,
• A slight (20%) chance of AM showers, a mix of clouds and sun and a bit cooler Wednesday afternoon, partly cloudy in the evening, mostly cloudy late Wednesday night,
• Mostly cloudy with areas of AM fog, partly cloudy Thursday afternoon, then partly cloudy with a (30%) chance of showers at night.
• highs near 46-44 lows 37-33.
• Mostly cloudy and a bit cooler with a (40%) chance of rain Friday, partly cloudy with a slight (20%) chance of rain Friday night,
• Partly cloudy and a bit warmer Saturday, mostly cloudy with a good (50%) chance of rain Saturday night and a bit cooler Sunday (New Year’s Day), a (40%) chance of rain and snow showers Sunday night (snow level 1,000 ft.),
• Then a mix of clouds and sun and a bit cooler with a slight (20%) chance of rain and snow showers Monday.
• highs 40-32 lows 30-33 cooling back to 30 Sunday night. (seasonal averages high 45 low 33)

 

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Forecast for Roseburg:

• Mostly cloudy with morning rain, showers likely (70%) and a bit warmer this afternoon (0.25 in. of rain possible, snow level 3,000 ft. rising to 3,500 ft.), showers likely (70%) this evening, a (40%) chance of showers  late tonight (0.10 in. of rain possible, snow level 3,500 ft. falling to 3,000 ft.),
• Mostly cloudy Wednesday AM, just partly cloudy and a bit cooler in the afternoon and evening, mostly clear with areas of fog late Wednesday night,
• Partly cloudy with areas of fog Thursday AM, partly cloudy and a bit cooler in the afternoon, then partly cloudy with a slight (20%) chance of rain late Thursday night.
• highs near 46 lows 39-36.
• Mostly cloudy with a (30%) chance of rain and a bit cooler Friday, a (30%) chance of rain and snow and colder at night,
• Just mostly cloudy and a bit cooler Saturday, mostly cloudy with a (30%) chance of evening rain, mostly cloudy with a good (50%) chance of rain and snow late Saturday night,
• Cloudy with a good (50%) chance of rain and snow Sunday (New Year’s Day) and Sunday night,
• Then mostly cloudy and a bit cooler with a (30%) chance of rain and snow showers Monday.
• highs 44-36 lows 30-33 cooling back to 30 Sunday night. (seasonal averages high 48 low 36)

 

 

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

• AM Rain, showers and a bit warmer this afternoon (0.25 in. of rain possible), cloudy with a (40%) chance of evening coastal showers while evening showers likely inland and a good (50%) chance of inland showers late tonight (0.10 in. of rain possible),
• Mostly cloudy Wednesday AM, just partly cloudy and a bit cooler in the afternoon, partly cloudy with areas of fog late Wednesday night,
• Mostly cloudy with areas of AM fog, partly cloudy and a bit warmer Thursday afternoon, then partly cloudy with a slight (20%) chance of rain late Thursday night.
• highs 52-50 warming back to 52 Thursday lows 42-39.
• Mostly cloudy with a (40%) chance of rain and a bit cooler Friday, a slight (20%) chance of showers at night,
• Mostly cloudy and a bit cooler with a slight (20%) chance of showers Saturday, mostly cloudy with a good (50%) chance of rain Saturday night and Sunday (New Year’s Day), a good (50%) chance of evening rain, a good (50%) chance of rain and snow Sunday night,
• Then mostly cloudy and a bit cooler with a (40%) chance of rain and snow showers Monday.
• highs 48-42 lows 36-38 cooling to 35 Sunday night. (seasonal averages high 51 low 40)

 

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Forecast for the Cascades in Lane County:

• Mostly cloudy with rain and snow this AM, rain and snow showers and a bit warmer this afternoon (0.50 in. of rain possible, 3-6 in. of snow possible) and breezy (Wind: SW 15-25 mph decreasing and shifting to W 10-15 mph in the afternoon), rain and snow showers tonight (0.10 in. of rain possible, 1-3 in. of snow possible),
• Partly cloudy with a slight (20%) chance of AM rain and snow showers, partly cloudy and a bit cooler Wednesday afternoon and at night,
• Partly cloudy and a bit warmer Thursday, then partly cloudy with a slight (20%) chance of showers Thursday night.
• snow level 3,500 ft. today, 3,000 ft. tonight, 4,000 ft. Wednesday, free air freezing level 4,500 ft. Wednesday night, 6,500 ft. Thursday, then snow level 5,500 ft. Thursday night.
• highs 33-38 lows near 23.
• A mix of clouds and sun with a (40%) chance of rain and snow a bit cooler Friday, partly cloudy with a (30%) chance of  snow Friday night,
• Mostly sunny and a bit warmer Saturday, becoming mostly cloudy with a good (50%) chance of snow Saturday night,
• Snow likely (70%) and a bit cooler Sunday (New Year’s Day), cloudy with a good (50%) chance of snow showers at night,
• Then mostly cloudy and cooler with a (40%) chance of snow showers Monday.
• free air freezing level 6,000 ft. Thursday, 6,500 ft. Thursday night, snow level 4,500 ft. Friday, then at the surface Friday night through Sunday (New Year’s Day).
• highs 32-35 cooling to 22 Monday lows 19-14.

 

 

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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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