Here is my new weekly weather quiz question. What is an“Adiabatic Lapse Rate?” 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 Upper level High (Shaded “Arch” shape with blue arrows) to our Northwest is sending cold air down to us from Canada. Low pressure to the South combines to return the moisture to Oregon by late Friday. The days 1-3 graphic shows  surface low and frontal system that is moving Southward along the Pacific Coast and then inland well to our South by Wednesday giving us the short break from the precipitation chances. The graphic for days 3-7 shows the break from storms Thursday and most of Friday. Then more frontal systems that will be headed our way late Friday into Saturday and again Monday.  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 26 in the Good category measuring Particulate Matter.

Oakridge: The Air Quality Index is 13 in the Good category measuring Particulate Matter.

Cottage Grove: The Air Quality Index is 18 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: YELLOW – Caution is Advised.

Oakridge: YELLOW – Caution is Advised.

*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 WIND ADVISORY IS IN EFFECT UNTIL 4 PM WEDNESDAY FOR THE GREATER PORTLAND METRO AREA.
• WINTER STORM WARNING IS IN EFFECT  THROUGH 4 AM WEDNESDAY ABOVE 2,000 FT. FOR EASTERN CURRY COUNTY AND  JOSEPHINE COUNTY.
• A WINTER STORM WARNING IS IN EFFECT UNTIL 10 AM WEDNESDAY FOR THE SOUTH CENTRAL OREGON CASCADES, THE SISKIYOU MOUNTAINS, THE KLAMATH BASIN, NORTHERN AND EASTERN KLAMATH COUNTY, AND CENTRAL, EASTERN AND WESTERN LAKE COUNTY.
• A WINTER WEATHER ADVISORY IS IN EFFECT UNTIL 10 AM WEDNESDAY FOR CENTRAL DOUGLAS COUNTY, EASTERN CURRY COUNTY, JOSEPHINE COUNTY, THE EASTERN DOUGLAS COUNTY FOOTHILLS, AND JACKSON COUNTY.
• 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 clear this evening, increasing clouds to cloudy and cold with a slight (20%) chance of snow late tonight,
• Cloudy with AM snow likely (70%), mostly cloudy and a bit cooler with a good (50%) chance of snow Wednesday afternoon (0.10 in. of rain possible, 1 in. of snow possible), a slight (20%) chance of evening snow, partly cloudy and cold late Wednesday night,
• Mostly sunny and a bit cooler Thursday, mostly clear and cold at night,
• Partly cloudy in the AM, mostly sunny and a bit cooler Friday, then mostly cloudy Friday night.
• lows 25-16 warming back to 25 Friday night highs 33-29 warming to 32 Friday.
• Cloudy with a good (50%) rain, freezing rain and snow and a bit warmer Saturday, then rain and freezing rain likely (70%) Saturday night.
• Mostly cloudy with rain likely (70%) and a bit warmer Sunday, cloudy with a good (50%) chance of rain at night,
• Rain likely (70%) Monday and Monday night,
• Then cloudy with a good (50%) chance of rain Tuesday.
• highs near 42 lows near 36. (seasonal averages high 46 low 34)

 

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Forecast for Roseburg:

• Cloudy with evening rain and snow likely (70%), rain with snow likely (70%) and a slight (20%) chance of freezing rain late tonight (under 0.10 in. of rain possible, 2-3 in. of snow possible above 1,500 ft. and 1-2 in. of snow possible lower elevations, snow level 100 ft.),
• Mostly cloudy with rain, snow likely (70%) and a slight (20%) chance of light freezing rain Wednesday AM, a good (50%) chance of rain and snow and a bit warmer in the afternoon (under 0.10 in. of rain possible, 1 in. of snow possible, snow level 0 ft. rising to 500 ft. in the afternoon), a slight (20%) chance of evening rain and snow, a slight (20%) chance of snow late Wednesday night (snow level 400 ft.),
• Partly cloudy in the AM, sunny and a bit cooler Thursday afternoon, mostly clear with patchy freezing fog late Thursday night and Friday AM, sunny and a bit warmer Friday afternoon, partly cloudy in the evening, then mostly cloudy with a slight (20%) chance of snow late at night,
• lows 30-25 highs 42-34 warming to 39 Friday.
• Mostly cloudy with rain, snow likely (70%) with a slight (20%) chance of light freezing rain and a bit warmer Saturday, rain Saturday night through Sunday night,
• Rain likely (70%) and a bit cooler Monday, rain and snow at night,
• Then mostly cloudy with rain and snow showers Tuesday.
• highs 44-48 cooling to 45 Monday and Tuesday lows 42-37. (seasonal averages high 48 low 36)

 

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

• Cloudy with a good (50%) of rain and snow this evening, good (50%) chance of coastal rain and a slight (20%) chance of light freezing coastal rain late tonight while a (40%) chance of inland rain and snow with a slight (20%) chance of freezing rain inland late tonight (under 0.10 in. of rain possible, snow level 400 ft.),
• Mostly cloudy with rain, snow likely (70%) with a slight (20%) chance of light freezing rain in the AM, a good (50%) chance of rain and snow and a bit warmer Wednesday afternoon (under 0.10 in. of rain poss1 in. of snow possible, snow level 100 ft. rising to 700 ft. in the afternoon), a slight (20%) chance of evening coastal rain and partly cloudy late at night while a slight (20%) chance of evening inland rain and snow and just mostly cloudy inland late Wednesday night (snow level 600 ft.),
• Partly cloudy Thursday AM, sunny and a bit cooler in the afternoon, mostly clear in the evening, partly cloudy with patchy freezing fog late Thursday night,
• Partly cloudy with patchy AM freezing fog, sunny and a bit warmer Friday afternoon, then becoming mostly cloudy with a slight (20%)  chance of rain and snow late Friday night.
• lows 34-25 warming to 35 Friday night highs 43-40 warming to 46 Friday.
• Mostly cloudy with rain, snow likely (70%) and a slight (20%) chance of light freezing rain Saturday AM, rain likely (70%) and a bit warmer in the afternoon, rain Saturday night through Monday night,
• Then showers Tuesday.
• highs 50-52 cooling to 49 Monday lows 44-40. (seasonal averages high 51 low 40)

 

 

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Forecast for the Cascades in Lane County:

• Mostly cloudy with a good (50%) chance of evening snow showers, snow likely (70%) and cold late tonight (2-4 in. of snow possible) and  breezy (Wind: E 15-25 mph gusts to 35 mph),
• Cloudy with AM snow, a good (50%) chance of snow and a bit cooler Wednesday (1-3 in. of snow possible), mostly cloudy with a (40%) chance of evening snow, just mostly cloudy and cold late Wednesday night,
• Mostly sunny and a bit warmer Thursday, mostly clear and very cold Thursday night,
• Mostly sunny and a bit warmer Friday, then mostly cloudy at night.
• snow level at the surface tonight through Wednesday night, then free air freezing level at the surface Thursday through Friday night.
• lows 9-4 warming to 11 Friday night highs 20-25.
• Cloudy with a good (50%) chance of snow and a bit warmer Saturday, then rain and snow likely (70%) Saturday night through Tuesday.
• highs 29-32 lows 23-20.

 

 

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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.

 

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

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