Here is my weekly weather quiz question for the last time. What is “The International Date Line? Here is the correct answer.  The International Date Line is the line of longitude located at 180 degrees East or West (with a few local deviations) where the date changes by a day. West of the line it is one day later than east of the line.

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An Upper Level Low Pressure Trough (“U “shape) moves in to return moisture and another frontal system. The graphics for days 1-3 show the frontal system moving southeastward through Northern California and away from the Pacific Northwest. The graphics for days 3-7 show more frontal activity moving our way Tuesday through next Saturday.

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Air Quality Index:

Eugene/Springfield: The Air Quality Index is 31 in the Good category measuring Particulate Matter.

Oakridge: The Air Quality Index is 20 in the Good 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)

NOTE: Outdoor burning remains temporarily prohibited for the following areas: Eugene-Springfield, Florence, Lowell, Oakridge and UGB, and Springfield and UGB.

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

• Partly cloudy with patchy fog late tonight,
• Patchy dense AM fog, partly cloudy and a bit warmer Sunday, becoming mostly cloudy a slight (20%) chance of evening showers, showers likely (70%) late Sunday night (under 0.10 in. of rain possible),
• Mostly cloudy with showers and a bit cooler Monday and a slight (20%) chance of afternoon thunderstorms (0.10 in. of rain possible), rain and snow showers at night (0.10 in. of rain possible, snow level 500 ft.),
• Mostly cloudy with AM snow and rain showers likely (70%), a bit cooler with a slight (20%) chance of rain and snow showers Tuesday afternoon (snow level 500 ft.), then just partly cloudy Tuesday night.
• lows 30-38 Sunday night cooling to 22 Tuesday night highs 52-42.
• Partly cloudy and a bit warmer Wednesday and in the evening, mostly cloudy with a slight (20%) chance of rain and snow showers late Wednesday night (snow level 1,000 ft.),
• Mostly cloudy with a slight (20%) chance of AM rain and snow showers, a bit warmer with a (40%) chance of showers Thursday afternoon and evening, partly cloudy with a slight (20%) chance of showers late Thursday night,
• Clouds and sun with a slight (20%) chance of AM showers, a bit warmer with a (40%) chance of showers Friday afternoon, partly cloudy with a slight (20%) chance of evening showers, just mostly cloudy late Friday night,
• Mostly cloudy with a slight (20%) chance of AM showers, then a (40%) chance of showers Saturday afternoon.
• highs 43-48 lows 24-32 cooling to 28 Friday night. (seasonal averages high 51 low 35)

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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 clear with patchy evening fog, mostly cloudy with patchy fog late tonight,
• Mostly cloudy with patchy AM fog, sunny and a bit warmer Sunday afternoon, partly cloudy with a (40%) chance of evening rain, mostly cloudy with patchy fog and a (40%) chance of rain late Sunday night,
• Mostly cloudy with AM showers and a slight (20%) chance of thunderstorms, colder with rain showers, snow showers and a slight (20%) chance of thunderstorms Monday afternoon (0.10 in. of rain possible) and at night (0.25 in. of rain possible),
• Mostly cloudy with AM rain and snow showers, rain and snow showers likely (70%) and a bit cooler Tuesday afternoon, partly cloudy with a slight (20%) chance of evening snow, then just partly cloudy and colder late Tuesday night.
• lows 34-39 cooling to 22 Tuesday night highs 55-40.
• Some AM clouds, sunny and a bit warmer Wednesday afternoon, partly cloudy in the evening, mostly cloudy with a slight (20%) chance of snow late Wednesday night,
• Mostly cloudy and a bit warmer with a slight (20%) chance of rain and snow Thursday and at night,
• Mostly cloudy and a bit warmer with a (30%) chance of rain and snow Friday, partly cloudy with a slight (20%) chance of evening rain, mostly cloudy with a slight (20%) chance of rain and snow Friday night,
• Mostly cloudy with a slight (20%) chance of AM rain and snow, then a slight (20%) chance of rain and a bit cooler Saturday afternoon.
• highs 44-52 cooling to 50 Saturday lows 26-30. (seasonal averages high 53 low 37)

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

• Mostly clear tonight,
• Some AM clouds, sunny and a bit warmer Sunday afternoon, mostly cloudy with a (30%) chance of coastal rain at night while a (30%) chance off inland rain with patchy inland fog late Sunday night (under 0.10 in. of rain possible ),
• Mostly cloudy with coastal showers and and a slight (20%) chance of thunderstorms while inland AM showers and a slight (20%) chance of thunderstorms with inland showers, snow showers and a bit cooler with a slight (20%) chance of thunderstorms Monday afternoon (0.10 in. of rain possible), showers, snow showers and a slight (20%) chance of thunderstorms at night (0.25 in. of rain possible),
• Mostly cloudy with AM showers, snow showers and a slight (20%) chance of thunderstorms, a bit cooler with rain and snow showers likely (70%) Tuesday afternoon, decreasing clouds with a slight (20%) chance of evening rain and snow showers, then partly cloudy and colder late Tuesday night.
• lows 33-39 cooling to 27 Tuesday night highs 55-44.
• Partly cloudy and a bit warmer Wednesday and in the evening, mostly cloudy with a slight (20%) chance of rain and snow late Wednesday night,
• Mostly cloudy with a (20%) chance of AM rain and snow, a (40%) chance of rain and a bit warmer Thursday afternoon, a good (50%) chance of rain at night,
• Mostly cloudy with a (40%) chance of rain Friday, a slight (20%) chance of rain Friday night,
• Mostly cloudy with a slight (20%) chance of AM rain and snow, then a slight (20%) chance of rain Saturday afternoon.
• highs 50-53 lows 30-35 cooling to 32 Friday night. (seasonal averages high 54 low 41)

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

• Mostly clear tonight,
• Mostly sunny start, partly cloudy and warmer Sunday afternoon, partly cloudy with a slight (20%) chance of evening showers and snow showers late Sunday night (under 0.10 in. of rain possible, 1 in. of snow possible),
• Mostly cloudy with AM snow and rain showers, snow showers and a bit cooler with a slight (20%) chance of thunderstorms Monday afternoon and breezy (Wind: W 20-25 mph gusts to 40 mph in passes), snow showers Monday night and windy (Wind: W 20-30 mph gusts to 40  mph in the passes),
• Mostly cloudy with snow showers and cooler Tuesday, partly cloudy with a slight (20%) chance of evening snow showers, then just partly cloudy late Tuesday night.
• free air freezing level 7,000 ft. tonight, 7,500 ft. rising to 10,000 ft. Sunday afternoon, snow level 4,500 ft. Sunday night, 3,000 ft. falling to falling to 2,000 ft. Monday afternoon, at the surface Monday night through Tuesday night.
• lows 24-27 cooling to 9 Tuesday night highs 48-23.
• Mostly sunny and a bit warmer Wednesday, partly cloudy Wednesday night,
• Clouds and sun with a slight (20%) chance of AM snow showers, a mix of clouds and sun and a bit warmer with a (40%) chance of snow and rain showers Thursday afternoon, mostly cloudy with a (40%) chance of evening snow showers, just partly cloudy late Thursday night,
• Clouds and sun with a slight (20%)  chance of AM snow showers, a mix of clouds and sun and a bit warmer with a slight (20%) chance of showers Friday afternoon, partly cloudy with a slight (20%) chance of evening showers, a slight (20%) chance of snow showers late Friday night,
• Clouds and sun with a slight (20%) chance of AM snow showers, then a mix of clouds and sun with a (40%) chance of rain and snow showers Saturday afternoon.
• free air freezing level at the surface Wednesday and Wednesday night, snow level 2,000 ft. Thursday, 2,500 ft. Thursday night and Friday, 3,000 ft. Friday night, then 2,500 ft. Saturday.
• highs 32-35 lows 15-22 cooling to 19 Friday night.

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