Here is my weekly weather quiz question. What is “Active Storage Capacity?” 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 trough of low pressure (Shaded “U” shape with blue arrows) is temporarily being replaced by high pressure (Shaded “Arch” shape with blue arrows) which brought sunshine and freezing fog to us to make it at least look like a “White Christmas” despite the fact that we didn’t get any snow. Low pressure is returning though. The days 1-3 graphic shows the frontal system moving over the Pacific Northwest overnight and Tuesday. 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 33 in the Good category measuring Particulate Matter.

Oakridge: The Air Quality Index is 51 in the Moderate category measuring Particulate Matter.

Cottage Grove: The Air Quality Index is 27 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 FROM 6 PM THIS EVENING THROUGH MIDNIGHT TUESDAY NIGHT FOR THE NORTHERN OREGON CASCADES AND THE CASCADES IN LANE COUNTY.
• A HIGH WIND WARNING IS IN EFFECT FROM 1 AM TUESDAY 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 8 PM TONIGHT FOR THE COAST RANGE OF NORTHWEST OREGON.
• A WINTER WEATHER ADVISORY IS IN EFFECT FROM 6 PM TONIGHT UNTIL 2 AM TUESDAY FOR THE WESTERN COLUMBIA RIVER GORGE.
• A WINTER WEATHER ADVISORY IS IN EFFECT FROM 6 PM TONIGHT UNTIL 6 AM TUESDAY FOR THE UPPER HOOD RIVER VALLEY.
•  A WINTER WEATHER ADVISORY IS IN EFFECT FROM 6 PM TONIGHT  UNTIL 4 AM TUESDAY FOR THE CENTRAL COLUMBIA RIVER GORGE AND THE NORTHERN OREGON CASCADE FOOTHILLS.
• A WINTER WEATHER ADVISORY IS IN EFFECT FROM 10 PM TONIGHT 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 and a bit cooler with rain tonight (0.25 in. of rain possible),
• Mostly cloudy with showers likely (70% ) and a bit warmer Tuesday (0.10 in. of rain possible), cloudy with a good (50%) chance of showers at night,
• 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.
• lows 38-33 highs near 46-44.
• Mostly cloudy and a bit cooler with a (40%) chance of rain Friday, partly cloudy with a slight (20%) chance of rain and snow 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 a (40%) chance of evening snow, rain late tonight (under 0.10 in. of rain possible, snow level 1,500 ft. rising to 2,500 ft. late at night),
• Mostly cloudy with rain and a bit warmer Tuesday (0.25 in. of rain possible, snow level 3,500 ft.), showers likely (70%) Tuesday night (0.10 in. of rain possible, snow level 3,500 ft.),
• 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 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.
• lows 39-36 highs near 46.
• Mostly cloudy with a (30%) chance of rain and a bit cooler Friday, a (30%) chance of rain and snow  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:

• Mostly cloudy with evening rain, rain tonight (0.50 in. of rain possible),
• Rain and a bit warmer Tuesday (0.25 in. of rain possible), cloudy with evening showers likely (60%), a good (50%) chance of showers late Tuesday night (0.10 in. of rain possible),
• Mostly cloudy with a slight (20%) chance of coastal showers Wednesday AM, just mostly 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.
• lows 43-39 highs 52-50 warming back to 52 Thursday.
• Mostly cloudy with a (40%) chance of rain and a bit cooler Friday and 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 a good (50%) chance of evening snow, snow late tonight (0.50 in. of rain possible, 3-6 in. of snow possible),
• Mostly cloudy with rain and snow in the AM, rain and snow showers and a bit warmer Tuesday afternoon (0.50 in. of rain possible, 3-6 in. of snow possible), rain and snow showers at night (0.10 in. of rain possible, 2 in. of snow possible),
• Mostly cloudy with a slight (20%) chance of AM rain and snow showers, partly cloudy and a bit cooler Wednesday afternoon and at night,
• Mostly sunny and a bit warmer Thursday, then partly cloudy with a slight (20%) chance of showers Thursday night.
• snow level at the surface tonight, 4,000 ft. Tuesday, 3,500 ft. Tuesday night, 3,000 ft. Wednesday, free air freezing level 5,000 ft. Wednesday night, 6,000 ft. Thursday, then snow level 5,500 ft. Thursday night.
• lows near 23 highs 34-38.
• 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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