Here is my weekly weather quiz question. What is the “Ionosphere?

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An Upper Level Low Pressure Trough (“U “shape) is slowly moving southward over the Pacific Northwest. The graphics for days 1-3 show the frontal that moved through Oregon.  The graphics for days 3-7 show more complex frontal activity moving our way Sunday through next Thursday giving us chances of getting wet.

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Air Quality Index:

Eugene/Springfield: The Air Quality Index is 17 in the Good category measuring Particulate Matter.

Oakridge: The Air Quality Index is 11 in the Good category measuring Particulate Matter.

Cottage Grove: The Air Quality Index is 8 in the Good category measuring Particulate Matter.

Data courtesy of Lane Regional Air Protection Agency (LRAPA)

NOTE: Outdoor burning season has now officially opened. The ban has been lifted.

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ADVISORIES:

• A WINTER WEATHER ADVISORY IS IN EFFECT FROM 4 AM SATURDAY UNTIL 4 PM SUNDAY FOR THE KLAMATH BASIN, NORTHERN AND EASTERN KLAMATH COUNTY, AND WESTERN, CENTRAL, AND EASTERN LAKE COUNTY.
• A WINTER WEATHER ADVISORY IS IN EFFECT FROM 4 AM SATURDAY UNTIL 4 PM SUNDAY ABOVE 1,000 FT. FOR THE EASTERN DOUGLAS COUNTY FOOTHILLS.
• A WINTER WEATHER ADVISORY IS IN EFFECT UNTIL 7 AM FRIDAY FOR THE NORTHERN BLUE MOUNTAINS OF OREGON AND THE NORTHWEST BLUE MOUNTAINS.
• A WINTER WEATHER ADVISORY IS IN EFFECT FROM 4 AM SATURDAY UNTIL 1 PM SUNDAY ABOVE 1,000 FT.  FOR THE SOUTH CENTRAL OREGON COAST, THE CURRY COUNTY COAST, AND CENTRAL DOUGLAS COUNTY.
• A WINTER STORM WARNING IS IN EFFECT ABOVE 1,500 FT. FROM 4 AM SATURDAY UNTIL 4 PM SUNDAY FOR EASTERN CURRY COUNTY AND JOSEPHINE COUNTY.
• A WINTER WEATHER ADVISORY IS IN EFFECT FROM 4 AM SATURDAY UNTIL 4 PM SUNDAY FOR EASTERN CURRY COUNTY AND JOSEPHINE COUNTY.
• A WINTER WEATHER ADVISORY IS IN EFFECT FROM 4 AM SATURDAY UNTIL 4 PM SUNDAY FOR THE SOUTH CENTRAL OREGON CASCADES, THE SISKIYOU MOUNTAINS, AND THE SOUTHERN OREGON CASCADES.
• A WINTER STORM WATCH IS IN EFFECT FROM FRIDAY AFTERNOON THROUGH SATURDAY AFTERNOON ABOVE 1,000 FT. FOR THE CENTRAL COAST RANGE OF WESTERN OREGON.
• A WINTER WEATHER ADVISORY IS IN EFFECT FROM 4 AM SATURDAY UNTIL 4 PM SUNDAY ABOVE 1,000 FT. FOR THE EASTERN DOUGLAS COUNTY FOOTHILLS.

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

• Mostly cloudy with evening showers likely (70%),  a good (50%) chance of rain and snow showers late tonight (under 0.10 in. of rain possible, snow level 1,500 ft. falling to 1,000 ft. late tonight),
• Mostly cloudy with a good (50%) chance of AM rain and snow showers (snow level 1,000 ft.), showers and a bit cooler Friday afternoon (0.10 in. of rain possible, snow level 1,000 ft.), evening showers and a good (50%) chance of snow, rain and snow late Friday night (0.25 in., of rain possible, 1 in. of snow possible, snow level 1,500 ft. falling to 500 ft. late at night),
• Mostly cloudy with AM rain and snow showers and a slight (20%) chance of thunderstorms (snow level 500 ft.), showers with a slight (20%) chance of thunderstorms  Saturday afternoon (0.25 in. of rain possible, 1 in. of snow possible snow level 1,000 ft.), showers likely (70%), a good (50%) chance of snow showers late at night (under 0.10 in. of rain possible, 1 in. of snow possible, snow level 1,000 ft. falling to 500 ft. late at night),
• Mostly cloudy with AM rain and snow showers, showers Sunday afternoon (snow level 500 ft. rising to 1,000 ft. in the afternoon),  a good (50%) chance of evening rain and snow showers, then a slight (20%) chance of rain and snow showers late Sunday night (snow level 1,000 ft. falling to 500 ft. late at night).
• lows 32-28 highs near 44.
• Mostly cloudy with a slight (20%) chance of AM rain and snow showers (snow level 500 ft.), showers likely (70%) and a bit warmer Monday afternoon, a good (50%) chance of rain and snow Monday night (snow level 1,500 ft. falling to 1,000 ft. late at night),
• Mostly cloudy with AM rain likely (70%) and a (30%) chance of snow (snow level 500 ft.), rain likely (70%) Tuesday afternoon,  mostly cloudy with (40%) chance of evening rain and a slight (20%) chance of snow, a slight (20%) chance of rain and snow late Tuesday night snow level 1,500 ft. falling to 500 ft. late at night),
• Clouds and sun with a good (50%) chance of AM rain and a slight (20%) chance of snow (snow level 500 ft.), a mix of clouds and sun and a bit cooler with a (40%) chance of rain Wednesday afternoon, partly cloudy with a (40%) chance of evening rain and a slight (20%) chance of snow, a slight (20%) chance of rain and snow late Wednesday night (snow level 1,500 ft. falling to 1,000 ft. late at night).
• Clouds and sun with a good (50%) chance of AM rain and a slight (20%) chance of snow (snow level 1,000 ft.), then a good (50%) chance of rain Thursday afternoon.
• highs near 47 lows 30-28 (seasonal averages high 55 low 36)

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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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Forecast for the Umpqua Valley including Roseburg:

• Mostly cloudy with evening rain and snow likely (70%), a good (50%) chance of rain and snow tonight (under 0.10 in. of rain possible, 1 inch of snow, snow level 1,500 ft. falling to 900 ft. late tonight),
• Mostly cloudy and a bit warmer with good (50%) chance of rain and snow Friday (under 0.10 in. of rain possible, snow level 500 ft. rising to 1,5oo ft. Friday afternoon), a good (50%) chance of rain and snow with patchy blowing snow and visibility down to 0.25 mi. visibility late at night (under 0.10 in. of rain possible, snow level 700 ft.),
• Mostly cloudy and a bit cooler with showers and snow showers with a slight (20%) chance of snow showers Saturday snow level 500 ft. rising to 1,500 ft. in the afternoon (0.25 in. of rain possible , evening rain and snow  showers with a slight (20%) chance of thunderstorms, rain, snow likely (70%) with a slight (20%) chance of thunderstorms late Saturday night (under 0.10 in. of rain possible, snow level 600 ft.),
• Mostly cloudy with rain and snow and a bit warmer Sunday, then a good (50%) chance of rain and snow Sunday night.
• lows 32-28 highs 46-44 warming back to 46 Sunday.
• Mostly cloudy with a good (50%) chance of AM rain and snow, rain and snow likely (70% and a bit warmer Monday afternoon, evening rain and snow likely (70%), a good (50%) chance of rain and snow late Monday night,
• Mostly cloudy with a good (50%) chance of AM rain and snow, rain and snow likely (70%) Tuesday afternoon,  a (40%) chance of rain and snow  at night,
• Mostly cloudy and a bit warmer with a (40%) chance of rain and snow Wednesday, a slight (20%) chance of rain and snow Wednesday night,
• Then mostly cloudy with a (40%) chance of rain and snow Thursday.
• highs 47-49 lows 30-32. (seasonal averages high 57 low 39)

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

• Mostly cloudy with evening coastal rain and coastal rain likely (70%) late tonight while a (50%) chance of inland rain tonight (under 0.10 in. of rain possible, snow level 1,500 ft. falling t0 1,00 ft. late tonight),
• Mostly cloudy with AM coastal rain likely (70%) with a good (50%) chance of coastal rain Friday afternoon while a (40%) chance of inland rain and snow (o.10 in. of rain possible, snow level 800 ft. rising to 1,500 ft. in the afternoon), evening coastal rain likely (70%) with a slight (20%) chance of thunderstorms late at night while a (40%) chance of evening inland rain and snow with inland rain and snow land a slight (20%) chance of thunderstorms late Friday night (0.25 in. of rain possible, snow level 1,000 ft.),
• Mostly cloudy with AM showers and snow showers (snow possibly heavy at times) and a slight (20%) chance of thunderstorms, a bit cooler with showers and a slight (20%) chance of thunderstorms Saturday afternoon (0.50 in. of rain possible, snow level 900 ft. rising too 1,500 ft.), evening coastal showers with a slight (20%) chance of thunderstorms and coastal showers and snow showers with a slight (20%) chance of thunderstorms late at night while evening inland showers, snow showers and a slight (20%) chance of thunderstorms and inland rain, snow and a slight (20%) chance of thunderstorms late at night (0.10 in. of rain possible),
• Mostly cloudy and a bit warmer with rain and snow Sunday, then rain and snow likely (70%) Sunday night.
• lows near 34 highs 47-45 warming back to 47 Sunday.
• Mostly cloudy with AM rain and snow, rain and a bit warmer Monday afternoon, rain and snow likely (70%) Monday night,
• Mostly cloudy with AM rain and snow, rain Tuesday afternoon, a good (50%) chance of rain and snow at night,
• Mostly cloudy with a (0%) chance of AM rain and snow, a good (50%) chance of rain and a bit warmer Wednesday afternoon, a (40%) chance of rain and snow at night,
• Mostly cloudy with a good (50%) chance of AM rain and snow then a good (50%) chance of rain and a bit warmer Thursday afternoon,
• highs 45-49 lows 35-33. (seasonal averages high 55 low 41)

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

• Mostly cloudy with a good (50%) chance of snow showers tonight (1-4 in. of snow possible),
• Clouds and sun with a good (50%) chance of AM snow showers, a mix of clouds and sun and a bit cooler with snow showers likely (70%) Friday afternoon (2 in. of snow possible), mostly cloudy with evening snow showers likely (70%), partly cloudy with a (40%) chance of  snow showers changing to snow late Friday night,
• Mostly cloudy with snow Saturday (1-4 in. of snow possible), snow showers at night (1 in. of snow possible),
• Mostly cloudy with snow showers Sunday (1-3 in. of snow possible), evening snow showers likely (70%), then a good (50%) chance of snow showers late Sunday night.
• snow level 1,500 ft. this evening, at the surface Friday and Friday night, 1,500 ft. Saturday afternoon, then at the surface Saturday night through Sunday night.
• lows 17-15 warming back to 17 Friday night cooling to 13 Sunday night highs near 28.
• Mostly cloudy with a good (50%) chance of AM snow showers, snow showers and a bit warmer Monday afternoon, evening snow likely (70%), partly cloudy with a good (50%) chance of snow late Monday night,
• Mostly cloudy with snow Tuesday, evening snow likely (70%), a good (50%) chance of snow late Tuesday night,
• A mix of clouds and sun and a bit warmer with a good (50%) chance of snow Wednesday, partly cloudy with a good (50%) chance of snow Wednesday night,
• Then a mix of clouds and sun and a bit warmer a good (50%) chance of snow Thursday.
• snow level at the surface Monday and Monday night, 1,500 ft. Tuesday afternoon, at the surface Tuesday night, 1,500 ft. Wednesday and Wednesday night, then 2,000 ft. Thursday.
• highs 30-33 lows near 15.

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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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