Check out my latest Eugene Daily News Weather Or Not column:
http://eugenedailynews.com/2018/01/doesnt-go-boom-bomb/
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Here is my weekly weather quiz question for the last time. What is the “Coriolis Force?” Here is the correct answer. The Coriolis Force is a fictitious force used to account for the apparent deflection of a body in motion with respect to the earth, as seen by an observer on the earth. The deflection (to the right in the Northern Hemisphere) is caused by the rotation of the earth. I’ll have a new weekly wether quiz question for you starting Monday. The first person to post the correct answer as a comment on this page will win a week of free personalized weather forecasts tailored to your needs. Good luck.
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An Upper Level Low Pressure Trough (Shaded “U” shape with blue arrows) has taken control returning the wet weather. It has slowly moved across the Pacific Northwest. The graphics for days 1-3 show the frontal system that moved through today bringing rain and wind. The graphics for days 3-7 show the next frontal system heading our way Thursday and another approaching the coast next Monday.
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Air Quality Index:
Eugene/Springfield: The Air Quality Index is 10 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 8 in the Good category measuring Particulate Matter.
Data courtesy of Lane Regional Air Protection Agency (LRAPA)
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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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Advisories:
- A WINTER WEATHER ADVISORY IS IN EFFECT UNTIL 6 PM TODAY ABOVE 3,500 FT. FOR THE NORTHERN OREGON CASCADES AND THE CASCADES IN LANE COUNTY.
- A WINTER WEATHER ADVISORY IS IN EFFECT UNTIL 1 AM MONDAY FOR THE SOUTH CENTRAL OREGON CASCADES, THE SOUTHERN OREGON CASCADES, THE SISKIYOU MOUNTAINS, NORTHERN AND EASTERN KLAMATH COUNTY, AND WESTERN, CENTRAL AND EASTERN LAKE COUNTY.
- A HIGH SURF ADVISORY IS IN EFFECT UNTIL 10 PM TONIGHT FOR THE SOUTH CENTRAL OREGON COAST AND THE CURRY COUNTY COAST.
- A HIGH WIND WARNING IS IN EFFECT UNTIL 7 PM TONIGHT FOR NORTHERN AND EASTERN KLAMATH COUNTY, AND WESTERN, CENTRAL AND EASTERN LAKE COUNTY.
- A WIND ADVISORY IS IN EFFECT UNTIL 7 PM TONIGHT FOR NORTHERN AND EASTERN KLAMATH COUNTY, AND WESTERN, CENTRAL AND EASTERN LAKE COUNTY.
- A PERMANENT HEALTH ADVISORY REMAINS IN EFFECT FOR THE SOUTH UMPQUA RIVER 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 cloudy with a good (50%) of showers tonight (0.10 in. of rain possible),
- Cloudy with a good (50%) chance of showers Monday (0.10 in. of rain possible), a slight (20%) chance of evening showers, slight (20%) chance of rain late Monday night (under 0.10 in. of rain possible),
- Cloudy with a (40%) chance of AM rain, rain Tuesday afternoon (a bit warmer, 0.25 in. of rain possible Tuesday and 0.50 in. of rain possible Tuesday night) through Wednesday (a bit cooler), then showers Wednesday night.
- lows 37-34 warming to 40 cooling to 36 Wednesday night highs 48-50 cooling to 46 Wednesday.
- Mostly cloudy with showers and a bit cooler Thursday, showers likely (70%) Thursday night,
- Cloudy and a bit warmer with a good (50%) chance of rain and snow showers Friday, rain at night,
- Mostly cloudy with showers and a bit warmer Saturday, cloudy with slight (20%) chance of showers Saturday night,
- Then mostly cloudy and a bit warmer with a slight (20%) chance of showers Sunday.
- highs 44-52 lows 34-40. (seasonal averages high 48 low 35)
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Forecast for Roseburg:
- Mostly cloudy with evening showers, a good (50%) chance of rain and snow showers late tonight (0.10 in. of rain possible, snow level 3,500 ft. falling to 2,500 ft. late tonight),
- Mostly cloudy with a slight (20%) chance of AM rain and snow showers, a bit cooler with a slight (20%) chance of showers Monday afternoon (under 0.10 in. of rain possible), a (30%) chance of rain late at night (under 0.10 in. of rain possible, snow level 3,500 ft. at night),
- Mostly cloudy and a bit warmer with a rain Tuesday (0.25 in. of rain possible, AM snow level 3,500 ft.) and breezy at higher elevations (Wind: S 15-25 mph), rain possibly heavy at times Tuesday night (0.75 in. of rain possible)and Wednesday AM, rain and a bit cooler in the afternoon, then rain and snow showers Wednesday night.
- lows 38-43 Tuesday night cooling back to 38 Wednesday night highs 50-52.
- Mostly cloudy with rain and snow showers and a bit cooler Thursday, evening rain and snow showers, rain and snow showers likely (60%) Thursday night,
- Cloudy with a (40%) chance of rain and snow showers and a bit warmer Friday, a good (50%) chance of evening rain and snow, rain and snow likely (70%) Friday night,
- A good (50%) chance of rain and a bit warmer Saturday, then mostly cloudy with a slight (20%) chance of showers Saturday night and Sunday (a bit warmer).
- highs 44-52 lows 35-42 cooling to 40 Saturday night. (seasonal averages high 50 low 37)
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Forecast for The South Oregon Coast Including Coos Bay and North Bend:
- Mostly cloudy with a good (50%) chance of showers tonight (under 0.10 in. of rain possible),
- A (30%) chance of showers and a bit warmer Monday (0.10 in. of rain possible, a (40%) chance of rain late Monday night (under 0.10 in. of rain possible),
- Mostly cloudy and a bit warmer with rain Tuesday (0.75 in. of rain possible) and Tuesday night, rain possibly heavy late at night (1.25 in. of rain possible),
- Cloudy with rain and a bit warmer Wednesday, then showers Wednesday night.
- lows 43-47 cooling to 40 Wednesday night highs 52-54 cooling to 50 Wednesday.
- Cloudy and a bit cooler with rain and snow showers Thursday, rain and snow showers likely (70%) Thursday night,
- Cloudy with a good (50%) chance of showers and a bit warmer Friday, evening rain likely (60%), rain late Friday night,
- Mostly cloudy and a bit warmer with rain likely (60%) Saturday, then mostly cloudy with a slight (20%) chance of showers Saturday night and Sunday (a bit warmer).
- highs 48-56 lows 39-44. (seasonal averages high 52 low 40)
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Forecast for the Cascades in Lane County:
- Cloudy with evening rain and snow showers, a good (50%) chance of rain and snow showers late tonight (0.25 in. of rain possible, 1-3 in. of snow possible),
- Mostly cloudy and a bit cooler with a good (50%) chance of rain and snow showers Monday (under 0.10 in. of rain possible, 1 in. of snow possible), a slight (20%) chance of rain and snow Monday night,
- Cloudy and a bit warmer with rain and snow Tuesday (2 in. of snow possible) and Tuesday night (2-5 in. of snow possible),
- Mostly cloudy and a bit cooler with rain and snow Wednesday (3-6 in. of snow possible), evening rain and snow showers, then snow showers late at night.
- snow level 3,500 ft. tonight, 3,000 ft. Monday and Monday night, 3,500 ft. rising to 4,500 ft. Tuesday afternoon, 5,500 ft. Tuesday night, 4,500 ft. Wednesday, then 3,000 ft. Wednesday evening.
- lows 26-24 warming to 32 Tuesday night cooling to 25 Wednesday night highs 35-38 cooling back to 35 Wednesday.
- Mostly cloudy with snow showers and a bit cooler Thursday, snow showers likely (70%) at night,
- A good (50%) chance of snow showers Friday, snow showers Friday night,
- Mostly cloudy with rain and snow showers and a bit warmer Saturday, cloudy with a slight (20%) chance of rain and snow showers Saturday night,
- Then mostly cloudy and a bit warmer with a slight (20%) chance of rain and snow showers Sunday.
- snow level at the surface Thursday through Friday night, 4,000 ft. Saturday, 5,500 ft. Saturday night, then 5,000 ft. Sunday.
- highs 30-42 lows 23-32.
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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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