Here is my weekly weather quiz question for the last time. What is the “Kelvin Temperature Scale? Here is the correct answer.  The Kelvin Temperature Scale is an absolute temperature scale in which a change of 1 Kelvin equals a change of 1 degree Celsius; 0ºK is the lowest temperature on the Kelvin scale. The freezing point of water is +273ºK (Kelvin) and the boiling point of +373ºK. It is used primarily for scientific purposes. It is also known as the Absolute Temperature Scale.

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An Upper Level Low Pressure Trough (“U” shape) continues to control the weather of the Pacific Northwest. The graphics for days 1-3 show the complex frontal system that pushed through Oregon. The graphics for days 3-7  Wednesday through Sunday show the complex frontal systems that will slide into the Pacific Northwest through the period.

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Air Quality Index:

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

Oakridge: The Air Quality Index is 10 in the Good category measuring Particulate Matter.

Cottage Grove: The Air Quality Index is 3 in the Good category measuring Particulate Matter.

Data courtesy of Lane Regional Air Protection Agency (LRAPA)

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ADVISORIES:

•  A WINTER STORM WARNING IS IN EFFECT UNTIL 5 PM TODAY ABOVE 4,000 FT. FOR THE NORTHERN BLUE MOUNTAINS OF OREGON AND THE NORTHWEST BLUE MOUNTAINS.
• A WINTER STORM WARNING IS IN EFFECT UNTIL 11 PM TONIGHT FOR THE EAST SLOPES OF THE OREGON CASCADES.
• A WINTER STORM WARNING IS IN EFFECT UNTIL 11 PM TONIGHT ABOVE 1,500 FT. THE NORTHERN OREGON CASCADES, THE CASCADES IN LANE COUNTY,
• A WINTER STORM WARNING  IS IN EFFECT UNTIL 11 PM TONIGHT ABOVE 1,500 FT. FOR THE NORTHERN OREGON CASCADE FOOTHILLS AND THE CASCADE FOOTHILLS IN LANE COUNTY.
• A WINTER STORM WARNING IS IN EFFECT UNTIL 11 AM MONDAY  FOR THE SISKIYOU MOUNTAINS AND THE SOUTHERN OREGON CASCADES.
• A WINTER STORM WARNING IS IN EFFECT UNTIL 11 AM MONDAY FOR THE SOUTH CENTRAL OREGON CASCADES, THE KLAMATH BASIN, NORTHERN AND EASTERN KLAMATH COUNTY, AND CENTRAL AND EASTERN LAKE COUNTY.
• A WINTER WEATHER ADVISORY IS IN EFFECT UNTIL 11 AM MONDAY FOR THE SOUTH CENTRAL OREGON CASCADES, THE KLAMATH BASIN, NORTHERN AND EASTERN KLAMATH COUNTY, AND CENTRAL AND EASTERN LAKE COUNTY.
•  A WINTER STORM WARNING IS IN EFFECT UNTIL 11 AM MONDAY  ABOVE 2,500 FT. FOR THE EASTERN DOUGLAS COUNTY FOOTHILLS AND JACKSON COUNTY.
• A WINTER STORM WARNING IS IN EFFECT FROM 11 PM TONIGHT UNTIL 11 AM MONDAY ABOVE 2,000 FT. FOR THE SOUTH CENTRAL OREGON COAST,  CENTRAL DOUGLAS COUNTY, AND EASTERN CURRY COUNTY AND JOSEPHINE COUNTY.
• A WINTER WEATHER ADVISORY IS IN EFFECT UNTIL 11 PM TONIGHT ABOVE 4,000 FT. FOR THE SOUTHERN BLUE MOUNTAINS OF OREGON, THE OCHOCO, AND THE JOHN DAY HIGHLANDS.
• A WINTER STORM WARNING IS IN EFFECT UNTIL 11 PM TONIGHT FOR ABOVE 1,500 FT. FOR THE COAST RANGE OF NORTHWEST OREGON, AND THE CENTRAL COAST RANGE OF WESTERN OREGON.
• A WINTER WEATHER ADVISORY IS IN EFFECT UNTIL 11 PM TONIGHT ABOVE 1,500 FT. FOR THE UPPER HOOD RIVER VALLEY.
• A WINTER WEATHER ADVISORY IS IN EFFECT UNTIL 11 AM MONDAY FOR CENTRAL AND EASTERN LAKE COUNTY.
• A WINTER WEATHER ADVISORY IS IN EFFECT UNTIL 2 AM MONDAY ABOVE 4,000 FT. FOR WALLOWA COUNTY.

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

• Mostly cloudy, sun breaks, with showers and a slight (20%) chance of thunderstorms and a bit cooler today (0.25 in. of rain possible, more in storms, small hail possible) and in the evening, rain and snow showers late tonight (0.10 in. of rain possible, more in storms, little or no snow accumulation possible, snow level 500 ft.),
• Mostly cloudy with AM snow showers likely (70%), showers and a slight (20%) chance of thunderstorms and a bit warmer Monday afternoon and evening (small hail possible, little or no snow accumulation expected), rain and  snow showers likely (70%) late Monday night (AM snow level 500 ft.),
• Mostly cloudy with AM snow showers, showers with a slight (20%) chance of thunderstorms Tuesday afternoon, a good (50%) chance of evening showers, then partly cloudy with a slight (20%) chance of rain and snow showers late Tuesday night.
• highs 46-48 lows 32-34 cooling back to 32 Tuesday night.
• Mostly cloudy with a (40%) chance of AM snow showers, a mix of clouds and sun and a bit warmer with a (40%) chance of showers Wednesday afternoon and Wednesday night,
• A mix of clouds and sun with a good (50%) chance of showers and a bit warmer Thursday, mostly cloudy with a good (50%) chance of showers at night,
• Mostly cloudy and a bit warmer with a good (50%) chance of showers Friday, a (30%) chance of evening showers, a slight (20%) chance of showers late Friday night,
• Then a mix of clouds and sun and a bit warmer with a slight (20%) chance of showers Saturday.
• highs 56-66 lows 33-42. (seasonal averages high 59 low 39)

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Home Wood Heating Advisory:

Posted Daily

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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Eugene-Springfield Pollen Count:

Forecast for the Umpqua Valley including Roseburg:

• Mostly cloudy with rain showers, snow showers and a slight (20%) chance of thunderstorms and a bit cooler today (0.25 in. of rain possible, 3-4 in. of snow possible, snow level 1,500 ft.), rain showers and snow showers with a slight (20%) chance of thunderstorms tonight (0.10 in. of rain possible, 1-2 in. of snow possible lower elevations while 2-3 in. of snow possible above 1,000 ft.),
• Mostly cloudy with rain showers and snow showers and a slight (20%) chance of thunderstorms and a bit warmer Monday and in the evening (snow level 900 ft.), rain and snow showers late Monday night (snow level 1,500 ft.),
• Mostly cloudy with AM rain and snow showers, rain showers and snow showers with a slight (20%) chance of thunderstorms  Tuesday afternoon, then a (30%) chance of rain and snow showers late Tuesday night.
• highs 45-47 lows 34-32.
• Mostly cloudy with a (30%) chance of AM rain and snow showers, a bit warmer with (40%) chance of rain and snow showers Wednesday afternoon, a (30%) chance of evening showers, a (30%) chance of rain and snow showers late Wednesday night,
• Mostly cloudy with a good (50%) chance of AM rain and snow showers, a good (50%) chance of showers and a bit warmer Thursday afternoon, a (40%) chance of showers at night,
• Mostly cloudy with a (30%) chance of showers and a bit warmer Friday, a slight (20%) chance of showers Friday night,
• Mostly cloudy with a slight (20%) chance of AM showers, then partly cloudy and a bit warmer Saturday afternoon.
• highs 54-68 lows 36-44. (seasonal averages high 60 low 41)

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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 thunderstorms today while inland AM showers, snow showers and a slight (20%) chance of thunderstorms and inland showers with a (40%) chance of thunderstorms this afternoon (0.25 in. of rain possible, little or no snow accumulation expected, snow level 2,000 ft. falling to 1,500 ft. this afternoon), coastal showers and (40%) chance of thunderstorms tonight while inland showers, snow showers and a (30%) chance of thunderstorms tonight (0.25 in. of rain possible, 1-2 in. of snow possible, snow level 1,500 ft. falling to 1,000 ft. late tonight),
• Mostly cloudy with AM coastal showers with a slight (20%) chance of thunderstorms and showers likely (70%) with a (30%) chance of thunderstorms Monday afternoon while inland showers and snow showers and a slight (20%) chance of thunderstorms Monday (snow level 1,000 ft.),  a good (50%) chance of evening coastal showers with a slight (20%) chance of thunderstorms with coastal showers late at night while inland showers and snow showers likely (70%) and a slight (20%) chance of thunderstorms with inland rain and snow showers late Monday night (snow 2,000 ft. falling to 1,500 ft. late at night),
• Mostly cloudy with AM rain and snow showers, rain and snow showers likely (70%) with a slight (20%) chance of thunderstorms Tuesday afternoon, a good (50%) chance of evening showers, then a (40%) chance of rain and snow showers late Tuesday night.
• highs 46-49 lows 35-37 cooling to 33 Wednesday night.
• Mostly cloudy with a (40%) chance of AM rain and snow showers, a (40%) chance of showers and a bit warmer Wednesday afternoon, a (40%) chance of showers Wednesday night,
• Mostly cloudy with a good (50%) chance of AM showers, showers likely (70%) and a bit warmer Thursday afternoon, a good (50%) chance of showers at night,
• Mostly cloudy with a (40%) chance of showers Friday, a slight (20%) chance of showers Friday night,
• Mostly cloudy with a slight (20%) chance of AM showers, then just  mostly cloudy and a bit warmer Saturday afternoon.
• highs 53-56 lows 32-39. (seasonal averages high 56 low 43)

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Forecast for the Northern Oregon Cascades including the Cascades in Lane County:

• Mostly cloudy with snow showers and a slight (20%) chance of thunderstorms and a bit cooler today (0.75 in. of rain possible, small hail possible, 5-9 in. of snow possible, snow possibly heavy at times, patchy blowing snow), evening snow showers with a slight (20%) chance of thunderstorms (small hail possible), snow showers late tonight (0.25 in. of rain possible, 2-4 in. of snow possible),
• Mostly cloudy with AM snow showers, snow showers with a slight (20%) chance of thunderstorms and a bit cooler Monday afternoon and evening (small hail possible, moderate snowfall expected), snow showers late at night,
• Mostly cloudy and a bit warmer with snow showers and a slight (20%) chance of thunderstorms Tuesday (small hail possible, snow possibly heavy at times), evening snow showers likely (70%), then partly cloudy with a good (50%) chance of snow showers late Tuesday night.
• snow level 2,000 ft. today, at the surface tonight through Monday night, then 1,500 ft. Tuesday and Tuesday night.
• highs 29-27 warming back to 29 Tuesday lows 17-19.
• A mix of clouds and sun with a (40%) chance of snow showers and a bit warmer Wednesday, a good (50%) chance of afternoon and evening showers, partly cloudy with a (40%) chance of snow showers late Wednesday night,
• A mix of clouds and sun with a good (50%) chance of snow and rain showers Thursday, a good (50%) chance of rain and snow showers Thursday night,
• A mix of clouds and sun and a bit warmer with a good (50%) chance of rain and snow showers Friday, a (30%) chance of evening showers, partly cloudy with a slight (20%) chance of rain and snow showers late Friday night,
• Mostly cloudy with a slight (20%) chance of AM snow showers, then partly cloudy and a bit warmer with a slight (20%) chance of showers Saturday afternoon.
• snow level 2,500 ft. Wednesday, 3,000 ft. Wednesday night, 4,000 ft. Thursday, 4,500 ft. Thursday night, 5,000 ft. Friday, 6,000 ft. Friday night, then 6,500 ft. Saturday.
• highs 38-48 lows 22-29.

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For all of your Eugene-Springfield and Lane County News, Weather, and Sports go to: EugeneDailyNews.com

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