Here is my weekly weather quiz question for the last time. What is “Active Storage Capacity?” Here is the correct answer. Active Storage Capacity: In hydrologic terms, the total amount of reservoir capacity normally available for release from a reservoir below the maximum storage level. It is total or reservoir capacity minus inactive storage capacity. More specifically, it is the volume of water between the outlet works and the spillway crest. I’ll have a new weekly weather quiz question for you starting Monday. 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 19 in the Good category measuring Particulate Matter.

Oakridge: The Air Quality Index is 38 in the Good category measuring Particulate Matter.

Cottage Grove: The Air Quality Index is 11 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: 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 10 AM MONDAY ABOVE 500 FT. FOR THE SOUTH CENTRAL OREGON COAST, THE CURRY COUNTY COAST, CENTRAL DOUGLAS COUNTY.
• A WINTER STORM WARNING IS IN EFFECT  THROUGH 10 AM MONDAY ABOVE 2,000 FT. FOR CENTRAL DOUGLAS COUNTY, EASTERN CURRY COUNTY,  JOSEPHINE COUNTY, AND JACKSON COUNTY.
• A WINTER STORM WARNING IS IN EFFECT THROUGH 10 AM MONDAY FOR CENTRAL DOUGLAS COUNTY,  AND THE EASTERN DOUGLAS COUNTY FOOTHILLS.
• A WINTER STORM WARNING IS IN EFFECT UNTIL 10 AM MONDAY ABOVE 2,000 FT. FOR EASTERN CURRY COUNTY, JOSEPHINE COUNTY.
• A WINTER WEATHER ADVISORY IS IN EFFECT UNTIL 10 AM MONDAY BELOW 2,000 FT. FOR JACKSON COUNTY.
• A WINTER WEATHER ADVISORY IS IN EFFECT UNTIL 10 AM MONDAY ABOVE 500 FT. FOR CENTRAL DOUGLAS COUNTY.
• A WINTER WEATHER ADVISORY IS IN EFFECT UNTIL 10 AM MONDAY FOR EASTERN CURRY COUNTY, JOSEPHINE COUNTY, THE SOUTH CENTRAL OREGON CASCADES, THE SOUTHERN OREGON CASCADES , THE SISKIYOU MOUNTAINS, NORTHERN AND EASTERN KLAMATH COUNTY, AND WESTERN LAKE COUNTY.
• *A HIGH SURF ADVISORY IS IN EFFECT UNTIL 4 AM MONDAY FOR SOUTH CENTRAL OREGON COAST AND THE CURRY COUNTY COAST.
• 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 evening rain and snow showers likely (70%), a good (50%) chance of snow showers and colder late tonight (under 0.10 in. of rain possible, under 1 in. of snow possible),
• A mix of clouds and sun and a bit cooler with a slight (20%) chance of snow showers Monday (under 0.10 in. of rain possible), partly cloudy and cold with a slight (20%) chance of snow showers at night,
• 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.
• lows 29-19 highs 34-32.
• 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:

• Mostly cloudy with evening rain and snow showers, a good (50%) chance of snow showers and colder late Sunday night (0.10 in. of rain possible, 3-5 in. of snow possible above 1,500 ft. and 1-2 in. of snow possible at lower elevations, snow level 300 ft.),
• Cloudy with a good (50%) chance of rain and snow showers and a bit cooler Monday (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 at night (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.
• lows 29-26 warming to 32 Tuesday night cooling to 29 Wednesday night highs 37-42.
• 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:

• Mostly cloudy with coastal showers and a slight (20%) chance of isolated thunderstorms this evening with  coastal showers, snow showers and isolated thunderstorms late tonight while inland evening rain and snow showers tonight (0.25 in. of rain possible, 2-3 in. of snow possible inland, snow level 700 ft.),
• Cloudy with coastal showers likely (70%) Monday AM while AM inland rain and snow showers likely (70%) and a good (50%) chance of rain and snow showers and a bit cooler in the 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 at night while a (40%) chance of inland rain and snow showers and a bit cooler Monday night (0.10 in. of rain possible, snow level 800 ft. falling to 300 ft. late at night),
• 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 and snow showers and a slight (20%) chance of coastal freezing rain late Tuesday night while a (30%) chance of 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.
• lows near 33 highs 42-45.
• Mostly cloudy with a slight (20%) chance of showers Thursday through Friday, a (40%) chance of rain Friday night,
• Then 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 with snow showers and cold tonight (1-2 in. of snow possible),
• Mostly cloudy and cooler with a good (50%) chance of snow showers Monday and Monday night,
• 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 tonight through Wednesday.
• lows 14-18 cooling to 8 Wednesday night highs 22-25 cooling back to 22 Wednesday.
• 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 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 night 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.

 

________________

Get your local Eugene-Springfield and Lane County news on-line at eugenedailynews.com.

________________

Here is my weekly weather quiz question for the last time. What is “Active Storage Capacity?” Here is the correct answer. Active Storage Capacity: In hydrologic terms, the total amount of reservoir capacity normally available for release from a reservoir below the maximum storage level. It is total or reservoir capacity minus inactive storage capacity. More specifically, it is the volume of water between the outlet works and the spillway crest. I’ll have a new weekly weather quiz question for you starting Monday. 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.

________________

An elongated Upper Level Low Pressure Trough has moved in, but the high pressure behind it (Shaded “Arch” shape with blue arrows) will send cold air down to us from Canada. The days 1-3 graphic shows a frontal system moving 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, if that much. The graphic for days 3-7 shows another frontal system that will slide Southward along the Oregon coast Friday into Saturday next week.  For mountain snow conditions at the local ski areas check out their websites or give them a call.

________________

 

Air Quality Index:

Eugene-Springfield: The Air Quality Index is 9 in the Good category measuring Particulate Matter.

Oakridge: The Air Quality Index is 54 in the Moderate category measuring Particulate Matter.

Cottage Grove: The Air Quality Index is 19 in the Good category measuring Particulate Matter.

Data courtesy of Lane Regional Air Protection Agency (LRAPA)

________________

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)

________________

Advisories:

• A WINTER WEATHER ADVISORY IS IN EFFECT UNTIL 3 PM TONIGHT FOR THE COAST RANGE OF NORTHWEST OREGON.
• A WINTER WEATHER ADVISORY IS IN EFFECT THROUGH THIS EVENING FOR THE CENTRAL COAST RANGE OF WESTERN OREGON.
• A WINTER WEATHER ADVISORY IS IN EFFECT 3 PM TODAY FOR THE LOWER COLUMBIA AND THE GREATER PORTLAND METRO AREA AND THE UPPER HOOD RIVER VALLEY.
• A WINTER WEATHER ADVISORY IS IN EFFECT THROUGH THIS EVENING FOR THE CENTRAL WILLAMETTE VALLEY, THE SOUTH WILLAMETTE VALLEY, THE NORTHERN OREGON CASCADES FOOTHILLS, THE NORTHERN OREGON CASCADE FOOTHILLS,  THE NORTHERN OREGON CASCADES, THE CASCADE FOOTHILLS IN LANE COUNTY AND THE CASCADES IN LANE COUNTY.
• A WINTER WEATHER ADVISORY IS IN EFFECT UNTIL 3 PM TODAY FOR THE WESTERN COLUMBIA RIVER GORGE AND THE CENTRAL COLUMBIA RIVER GORGE.
• A WINTER WEATHER ADVISORY IS IN EFFECT FROM 10 AM TODAY UNTIL 10 AM MONDAY ABOVE 500 FT. FOR THE SOUTH CENTRAL OREGON COAST, THE CURRY COUNTY COAST, CENTRAL DOUGLAS COUNTY.
• A WINTER STORM WARNING IS IN EFFECT  THROUGH 10 AM MONDAY ABOVE 2,000 FT. FOR CENTRAL DOUGLAS COUNTY, EASTERN CURRY COUNTY,  JOSEPHINE COUNTY, AND JACKSON COUNTY.
• A WINTER STORM WARNING IS IN EFFECT THROUGH 10 AM MONDAY FOR CENTRAL DOUGLAS COUNTY,  AND THE EASTERN DOUGLAS COUNTY FOOTHILLS.
• A WINTER STORM WARNING IS IN EFFECT UNTIL 10 AM MONDAY ABOVE 2,000 FT. FOR EASTERN CURRY COUNTY, JOSEPHINE COUNTY.
• A WINTER WEATHER ADVISORY IS IN EFFECT UNTIL 10 AM MONDAY BELOW 2,000 FT. FOR JACKSON COUNTY.
• A WINTER WEATHER ADVISORY IS IN EFFECT UNTIL 10 AM MONDAY ABOVE 500 FT. FOR CENTRAL DOUGLAS COUNTY.
• A WINTER WEATHER ADVISORY IS IN EFFECT UNTIL 10 AM MONDAY FOR EASTERN CURRY COUNTY, JOSEPHINE COUNTY, THE SOUTH CENTRAL OREGON CASCADES, THE SOUTHERN OREGON CASCADES , THE SISKIYOU MOUNTAINS, NORTHERN AND EASTERN KLAMATH COUNTY, AND WESTERN LAKE COUNTY.
• A HIGH SURF ADVISORY IS IN EFFECT FROM 10 AM TODAY UNTIL 4 AM MONDAY FOR SOUTH CENTRAL OREGON COAST AND THE CURRY COUNTY COAST.
• 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.

________________

 

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

• Cloudy and a bit warmer with rain and snow showers (0.25 in. of rain possible, 1 in. of snow possible) today (New Year’s Day), evening rain and snow showers likely (70%), a good (50%) chance of snow showers and colder late Sunday night (under 0.10 in. of rain possible, under 1 in. of snow possible),
• Mostly cloudy and a bit cooler with a slight (20%) chance of snow showers Monday, just partly cloudy and cold at night,
• Mostly sunny and a bit cooler Tuesday, mostly clear and cold with a slight (20%) chance of snow showers at night.
• lows 26-20 warming to 23 Monday night highs 40-32.
• A mix of clouds and sun and a bit warmer with a slight (20%) chance of snow Wednesday, mostly cloudy with a slight (20%) chance of snow showers Wednesday night,
• Partly cloudy and a bit warmer Thursday and at night,
• Mostly cloudy and a bit warmer Friday, a (40%) chance of rain and snow Friday night,
• Then mostly cloudy with a good (50%) chance of rain Saturday.
• highs 32-38 lows 18-26. (seasonal averages high 45 low 34)

 

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Forecast for Roseburg:

• Mostly cloudy and a bit cooler today (New Year’s Day) with rain and snow showers ( 0.25 in. of rain possible, 3-5 in. of snow possible above 1,500 ft. while 2-4 in. of snow possible at lower elevations, snow level 0 ft. rising to 900 ft. this afternoon),  evening rain and snow showers, a good (50%) chance of snow showers and colder late Sunday night (0.10 in. of rain possible, 4 in. of snow possible above 1,500 ft. and 1-2 in. of snow possible at lower elevations, snow level 300 ft.),
• Cloudy with a good (50%) chance of snow showers and a bit cooler Monday (under 0.10 in. of rain possible), mostly cloudy with a (40%) chance of snow showers at night,
• Mostly cloudy with a (40%) chance of AM snow showers, partly cloudy and a bit cooler with a (30%) chance of showers Tuesday afternoon, a (30%) chance of evening snow showers, then a (30%) chance of snow showers and a slight (20%) chance of freezing rain late Tuesday night.
• lows 32-20 highs 38-33.
• Mostly cloudy with a (30%) chance of rain, snow and a slight (20%) chance of freezing rain Wednesday AM, a (30%) chance of rain and snow and a bit warmer in the afternoon, mostly cloudy with a (30%) chance of rain and snow showers Wednesday night,
• Mostly cloudy with a slight (20%) chance of rain and snow showers and a bit warmer Thursday through Friday, a (30%) chance of rain and snow showers Friday night,
• Then mostly cloudy with rain and snow likely (70%) and a bit warmer Saturday.
• highs 35-43 lows 23-32t. (seasonal averages high 48 low 36)

 

________________

 

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

• Mostly cloudy and a bit cooler with AM coastal showers and showers with a slight (20%) chance of thunderstorms this afternoon (New Year’s Day) while rain and snow showers inland (0.25 in. of rain possible, 2-4 in. of snow possible, snow level 500 ft. rising to 1,000 ft. this afternoon), evening coastal showers with coastal rain and snow showers late tonight while evening inland evening showers with inland rain and snow showers likely (70%) late tonight (0.25 in. of rain possible, 1-2 in. of snow possible, snow level 600 ft.),
• Cloudy with a good (50%) chance of rain and snow showers Monday AM (snow level 200 ft.), mostly cloudy with a (40%) chance of rain and snow showers and a bit cooler Monday afternoon (0.10 in. of rain possible, snow level 100 ft.), mostly cloudy and colder with a good (50%) chance of snow showers Monday night (snow level 100 ft.),
• Mostly cloudy with a (40%) chance of AM rain and snow showers, partly cloudy and a bit warmer Tuesday with a (30%) chance of afternoon rain and snow showers, partly cloudy with a (30%) chance of rain and snow showers and a slight (20%) chance of freezing rain late Tuesday night.
• lows 36-26 highs 42-39 warming back to 42 Tuesday.
• Mostly cloudy with a (30%) chance of AM rain and snow, a bit warmer with a (40%) chance of rain Wednesday afternoon, a (30%) chance of showers at night,
• Mostly cloudy and a bit warmer with a slight (20%) chance of showers Thursday through Friday, a (40%) chance of showers Friday night,
• Then mostly cloudy with rain likely (70%) and a bit warmer Saturday.
• highs 44-48  lows 27-37. (seasonal averages high 51 low 40)

 

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Forecast for the Cascades in Lane County:

• Cloudy with snow showers (4-6 in. of snow possible) and a bit cooler today (New Year’s Day), snow showers and cold tonight (1-4 in. of snow possible),
• Cloudy and cooler with a good (50%) chance of snow showers Monday, mostly cloudy and very cold with a slight (20%) chance of snow showers at night,
• A mix of clouds and sun and a bit cooler Tuesday, then partly cloudy with a slight (20%) chance of snow showers Tuesday night.
• snow level at the surface today through Monday night, free air freezing level at the surface Tuesday, then snow level at the surface Tuesday night.
• lows 12-0 highs 26-19.
• A mix of clouds and sun and a bit warmer with a good (50%) chance of snow Wednesday, a (40%) chance of snow showers Wednesday night,
• A mix of clouds and sun with a slight (20%) chance of snow showers Thursday, partly cloudy with a slight (20%) chance of snow showers late at night,
• Mostly cloudy and a bit warmer Friday, a (40%) chance of snow Friday night,
• Then mostly cloudy with a good (50%) chance of snow Saturday.
• snow level at the surface Wednesday through Thursday night, free air freezing level at the surface Friday, then snow level at the surface Friday night and Saturday.
• highs 19-28 lows 0-13.

 

 

________________

 

**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.

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