Here is my new weekly weather quiz question. What is“Isentropic Analysis?

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The Upper Level Airflow has been sending moisture west to east straight into the Pacific Northwest, but behind the cold front we get colder.  The graphics for days 1-3 show the next cold front offshore, but fading as it approaches the coast. The graphics for days 3-7 show more complex frontal systems moving our way Friday through next Tuesday giving us more chances of getting wet.

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Air Quality Index:

Eugene/Springfield: The Air Quality Index is 20 in the Good category measuring Particulate Matter.

Oakridge: The Air Quality Index is 7 in the Good category measuring Particulate Matter.

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

Data courtesy of Lane Regional Air Protection Agency (LRAPA)

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ADVISORIES:.

• A WINTER WEATHER ADVISORY IS IN EFFECT UNTIL 6 AM MDT WEDNESDAY FOR HARNEY COUNTY AND BAKER COUNTY.
• A WIND ADVISORY IS IN EFFECT UNTIL 8 PM TONIGHT FOR FOR CENTRAL AND EASTERN LAKE COUNTY.

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

• Partly cloudy with a slight (20%) chance of evening showers, mostly cloudy with a good (50%) chance of showers late tonight (under 0.10 in. of rain possible),
• Clouds and sun with patchy fog and a good (50%) chance of AM showers (under 0.10 in. of rain possible), a mix of clouds and sun and a bit warmer Wednesday afternoon, mostly clear with areas of evening frost, widespread frost late Wednesday night,
• Some AM clouds with widespread frost, sunny and a bit warmer Thursday afternoon, mostly clear at night,
• Partly cloudy and a bit cooler Friday, then mostly cloudy with a (40%) chance of rain Friday night.
• lows 33-28 warming to 39 Friday night highs 50-58 cooling to 56 Friday.
• Mostly cloudy and a bit warmer with a good (50%) chance of rain Saturday, rain likely (70%) Saturday night,
• Mostly cloudy and a bit cooler with rain likely (70%) Sunday, mostly cloudy with a good (50%) chance of evening rain, a slight (20%) chance of rain late at night,
• Mostly cloudy with a good (50%) chance of rain Monday and Monday night,
• Mostly cloudy with a good (50%) chance of AM rain, then rain likely (70%) and a bit cooler Tuesday afternoon.
• highs 58-52 lows 42-35. (seasonal averages high 57 low 37)

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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 (LRAPAz

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Forecast for the Umpqua Valley including Roseburg:

• Cloudy with a (30%) chance of  rain and snow tonight (under 0.10 in. of rain possible, snow level 1,500 ft.),
• Mostly cloudy with a (30%) chance of AM rain and snow, just partly cloudy and a bit warmer Wednesday afternoon, mostly clear  Wednesday night,
• AM clouds, sunny and warmer Thursday, mostly clear at night,
• Mostly cloudy and a bit cooler with a slight (20%) chance of rain Friday afternoon, then a slight (20%) chance of rain Friday night.
• lows 35-32 warming to 36 Thursday night highs 52-62 cooling to 59 Friday.
• Mostly cloudy and a bit warmer with a (40%) chance of rain Saturday, evening rain likely (70%), rain late Saturday night,
• Mostly cloudy and a bit cooler with rain likely (70%) Sunday, a good (50%) chance of rain and snow at night,
• Mostly cloudy with a good (50%) chance of rain and snow Monday, evening rain likely (70%), a good (50%) chance of rain and snow Monday night,
• Then mostly cloudy and a bit cooler with rain and snow likely (70%) Tuesday.
• highs 59-54 lows 42-40. (seasonal averages high 59 low 40)

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

• Partly cloudy this evening and mostly cloudy with a slight (20%) chance of coastal rain late tonight while mostly cloudy with a slight (20%) chance of inland rain and snow with patchy fog late tonight (under 0.10 in. of rain possible),
• Mostly cloudy with a slight (20%) chance of AM coastal rain while a slight (20%) chance of inland AM rain and snow (under 0.10 in. of rain possible), partly cloudy and a bit warmer Wednesday afternoon, becoming mostly clear Wednesday night,
• Sunny and a bit warmer Thursday, mostly clear at night,
• Mostly cloudy with a slight (20%) chance of rain and a bit cooler Friday, then mostly cloudy with a (40%) chance of rain Friday night.
• lows 36-33 warming to 39 Friday night highs 52-58 cooling to 55 Friday.
• Mostly cloudy with a good (50%) chance of rain Saturday, rain Saturday night,
• Mostly cloudy with AM rain likely (70%), a good (50%) chance of rain and a bit cooler Sunday afternoon, a good (50%) chance of rain at night,
• Mostly cloudy and a bit cooler with a good (50%) chance of rain Monday and in the evening, then rain likely (70%) and a bit cooler Monday night and Tuesday.
• highs 55-52 lows 40-36. (seasonal averages high 55 low 42)

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

• Mostly cloudy with evening snow likely (70%), a good (50%) chance of snow showers late tonight (1-3 in. of snow possible),
• Mostly cloudy with a good (50%) chance of AM snow showers (1 in,. of snow possible), just partly cloudy and a bit cooler Wednesday afternoon, mostly clear Wednesday night,
• Mostly sunny and a bit warmer Thursday, mostly clear at night,
• Partly cloudy with a slight (20%) chance of rain Friday, then mostly cloudy with a good (50%) chance of rain and snow Friday night.
• snow level 3,000 ft. falling to 1,500 ft. tonight, 1,500 ft. Wednesday, 4,000 ft.rising t0 3,500 ft. late Wednesday night, 4,000 ft. rising to 6,000 ft. Thursday afternoon, 6,500 ft. falling to 5,000 ft. late Thursday night, snow level 3,500 ft. Friday, then 4,000 ft. Friday night.
• lows 20-25 highs 34-42
• Clouds and sun with a good (50%) chance of AM rain and snow, a  mix of clouds and sun with a good (50%) chance of rain and snow likely (70%) Saturday afternoon, rain and snow Saturday night,
• Mostly cloudy and a bit cooler with snow and rain Sunday, evening snow and rain likely (70%), a good (50%) chance of rain and snow late at night,
• Mostly cloudy and a bit cooler with a good (50%) chance of snow Monday with a good (50%) chance of snow and rain Monday afternoon, evening rain and snow likely (70%), a good (50%) chance of rain and snow Monday night,
• Mostly cloudy with AM snow likely (70%) and a good (50%) chance of rain, then snow with rain likely (70%) and a bit cooler Tuesday afternoon.
• snow level 4,000 ft. Saturday, 4,000 ft. Saturday night, 3,500 ft. Sunday, 3,000 ft. Sunday night and Monday, 3,500 ft. Monday nighty, then 3,000 Tuesday.
• highs 32-36 lows 27-23.

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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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