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) is sending cold air down to us from Canada. A surface low adds just enough moisture for a touch of rain mixed with snow. The days 1-3 graphic shows the next surface low and frontal system that will move Southward through along the Pacific Coast by Wednesday. There will be some precipitation, but so far there shouldn’t be enough moisture to bring any more than just a light snow/rain mix for the South Willamette Valley. The graphic for days 3-7 shows more frontal systems that will be headed our way Friday into Saturday and Sunday into 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 27 in the Good category measuring Particulate Matter.

Oakridge: The Air Quality Index is 70 in the Moderate category measuring Particulate Matter.

Cottage Grove: The Air Quality Index is 22 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 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 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 sunny and a bit cooler this afternoon, partly cloudy with a slight (20%) chance of evening snow, mostly cloudy and cold with a good (50%) chance of snow late tonight,
• Mostly cloudy with AM snow likely (70%), a good (50%) chance of snow Wednesday afternoon (1 in. of snow possible), mostly cloudy with a slight (20%) chance of evening snow, partly cloudy late Wednesday night,
• Then partly cloudy Thursday and at night.
• highs 33-30 lows 22-16.
• A mix of clouds and sun and a bit warmer Friday, partly cloudy Friday night,
• Becoming mostly cloudy with rain and snow likely (70%) and a good (50%) chance of freezing rain and a bit warmer Saturday (snow level 1,500 ft.), rain and freezing rain likely (70%) Saturday night, then rain likely (70%) and a bit warmer Sunday through Monday.
• highs 37-43 lows 27-38. (seasonal averages high 46 low 34)

 

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Forecast for Roseburg:

• Mostly cloudy with a slight (20%) chance of rain and snow showers and a bit cooler this afternoon (under 0.10 in. of rain possible, snow level 200 ft.), a (40%) chance of evening rain and snow and a slight (20%) chance of light freezing rain, rain with snow likely (70%) and a slight (20%) chance of freezing rain late tonight (under 0.10 in. of rain possible, 1-2 in. of snow possible above 1,500 ft. and 1 in. of snow possible lower elevations, snow level 500 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 (snow level 600 ft.), a (40%) chance of evening rain and snow, a slight (20%) chance of rain and snow showers late Wednesday night (snow level 400 ft.),
• Partly cloudy in the AM, sunny and a bit cooler Thursday afternoon, then partly cloudy Thursday night.
• highs 39-42 cooling to 38 Thursday lows 30-25.
• Partly cloudy and a bit warmer Friday, mostly cloudy with a (20%) chance of light freezing rain at night,
• Mostly cloudy with rain and snow likely (70%) with a slight (20%) chance of freezing rain Saturday AM, rain and snow likely (70%) in the afternoon, then rain likely (70%) Saturday night through Monday.
• highs 39-45 lows 30-39. (seasonal averages high 48 low 36)

 

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

• Mostly cloudy with a slight (20%) chance of coastal rain and a bit warmer this afternoon while a slight (20%) chance of inland rain and snow (snow level 100 ft. rising to 800 ft.), cloudy with a (30%) chance of evening coastal rain and snow with a good (50%) chance of rain and a slight (20%) chance of freezing rain late inland late tonight (0.10 in. of rain possible, 1 in. of snow possible, snow level 500 ft.rising to 1,000 ft. late tonight),
• Mostly cloudy with a good (50%) chance of coastal rain and snow with a slight (20%) chance of light freezing rain in the AM, a good (50%) chance of  coastal rainWednesday afternoon while inland AM snow likely (70%) with inland rain likely (70%) Wednesday afternoon (1 in. of snow possible, snow level 700 ft.), a (30%) chance of evening coastal rain and a slight (20%) chance of showers late at night while a (40%) chance of evening inland rain, a slight (20%) chance of rain and snow showers late Wednesday night (snow level 600 ft.),
• Partly cloudy Thursday AM, sunny and a bit cooler in the afternoon, partly cloudy Thursday night.
• highs 44-42 lows 34-30.
• Just partly cloudy and a bit warmer Friday, mostly cloudy a slight (20%) chance of rain, light freezing rain and snow late rain Friday night,
• Mostly cloudy with rain likely (70%) and a slight (20%) chance of light freezing rain in the AM, a bit warmer with rain likely (70%) Saturday, then rain likely (70%) Saturday night through Monday.
• highs 45-50 lows 35-42. (seasonal averages high 51 low 40)

 

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Forecast for the Cascades in Lane County:

• A mix of clouds and a bit cooler with a slight (20%) chance of snow showers this afternoon, mostly cloudy with a good (50%) chance of evening snow, breezy (Wind: E 15-25 mph) and cold with snow likely (70%) late tonight (1-4 in. of snow possible),
• Mostly cloudy with snow and a bit warmer Wednesday, a (40%) chance of evening snow, a slight (20%) chance of snow showers and cold late Wednesday night,
• Just partly cloudy and a bit cooler Thursday and at night.
• snow level at the surface today through Wednesday night, then free air freezing level at the surface Thursday and Thursday night.
• highs 16-23 lows 9-7.
• A mix of clouds and sun and a bit warmer Friday, partly cloudy at night,
• Becoming mostly cloudy with snow likely (70%) and a bit warmer Saturday, then rain and snow likely (70%) and a bit warmer Saturday night through Monday.
• highs 25-32 lows 17-27 cooling to 25 Sunday night.

 

 

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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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