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 next frontal system well offshore Sunday morning as a short-lived High Pressure Ridge (Shaded “Arch” shape with blue arrows) decreases the showers for the day today. The graphics for days 3-7 show the next frontal system heading our way Thursday and another approaching the coast Sunday AM.
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Air Quality Index:
Eugene/Springfield: The Air Quality Index is 9 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 5 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 HIGH WIND WARNING IS IN EFFECT FROM 2 AM UNTIL 10 AM SUNDAY NEAR THE BEACHES AND HEADLANDS FOR THE NORTH OREGON COAST AND THE CENTRAL OREGON COAST.
- A WINTER WEATHER ADVISORY IS IN EFFECT FROM 4 AM UNTIL 6 PM SUNDAY ABOVE 3,500 FT. FOR THE NORTHERN OREGON CASCADES AND THE CASCADES IN LANE COUNTY.
- A WINTER WEATHER ADVISORY IS IN EFFECT FROM 4 AM SUNDAY UNTIL 4 PM SUNDAY FOR THE SOUTH CENTRAL OREGON CASCADES, THE SOUTHERN OREGON CASCDES, ANDTHE SISKIYOU MOUNTAINS.
- A HIGH WIND WARNING IS IN EFFECT FROM 4 AM UNTIL 1 PM SUNDAY FOR THE SOUTH CENTRAL OREGON COAST AND THE CURRY COUNTY COAST.
- A HIGH WIND WARNING IS IN EFFECT FROM 7 AM UNTIL 7 PM SUNDAY 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 slight (20%) chance of evening rain, a good (50%) chance of rain late tonight (0.10 in. of rain possible),
- Mostly cloudy with rain (0.50 in. of rain possible) and a bit cooler Sunday and windy (Wind: S 20-30 mph gusts to 40 mph decreasing to S 10-15 mph gusts to 30 mph), a good (50%) of showers Sunday night (0.10 in. of rain possible),
- Cloudy with a good (50%) chance of showers Monday, a (30%) chance of evening showers, just mostly cloudy at night,
- Cloudy with a good (50%) chance of AM rain, rain Tuesday, then rain likely (70%) Tuesday night.
- lows 40-35 warming to 39 Tuesday night highs near 47.
- Mostly cloudy and a bit cooler with rain Wednesday, showers and a bit cooler Wednesday night,
- Cloudy with showers likely (70%) and a bit cooler Thursday, a good (50%) chance of showers at night and Friday (a bit warmer), mostly cloudy with a (40%) chance of showers Friday night,
- Then showers likely (70%) and a bit cooler Saturday.
- highs 46-43 warming to 47 Saturday lows 35-37. (seasonal averages high 48 low 35)
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Forecast for Roseburg:
- Cloudy with a (30%) chance of rain tonight (snow level 3,500 ft.),
- Mostly cloudy with rain and a bit cooler Sunday (snow level 3,000 ft. rising to 3,500 ft.) and breezy (Wind: S 15-25 mph), cloudy with evening showers likely (70%), a g slight (20%) chance of showers late Sunday night (snow level 3,000 ft.),
- Mostly cloudy and a bit warmer with a slight (20%) chance of rain and snow showers Monday (snow level 2,000 ft. rising to 2,500 ft. in the afternoon), a slight (20%) chance of rain late at night,
- Then mostly cloudy and a bit warmer with a rain likely (70%) Tuesday and Tuesday night.
- lows 39-43 highs 48-52.
- Mostly cloudy with rain and a bit cooler Wednesday, rain and snow showers likely (70%) and colder late Wednesday night,
- Mostly cloudy with rain and snow showers and a bit cooler Thursday, rain and snow showers likely (70%) and a bit warmer Thursday night and Friday (a bit warmer), rain and snow showers likely (70%) Friday night,
- Then showers likely (70%) and a bit warmer Saturday.
- highs 47-40 warming to 49 Saturday lows 43-49. (seasonal averages high 50 low 37)
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Forecast for The South Oregon Coast Including Coos Bay and North Bend:
- Cloudy with a (40%) chance of rain tonight and windy (Wind: S 15-25 mph increasing to S 25-35 mph at the shore while S 10-20 mph inland),
- Mostly cloudy with rain Sunday and windy (Wind: S 25-40 mph decreasing and shifting SW 10-20 mph in the afternoon while S 15-25 mph decreasing and shifting to SW 10-15 mph late in the afternoon), a good (50%) chance of showers Sunday night,
- Mostly cloudy with a (30%) chance of showers Monday (AM snow level 2,000 ft.), a slight (20%) chance of evening coastal showers, and a (%) chance of coastal rain at night while a (30%) chance of of inland rain late Monday night,
- Then mostly cloudy and a bit warmer with rain Tuesday and at night.
- lows 44-42 warming to 46 Tuesday night highs 52-55.
- Cloudy with rain and a bit cooler Wednesday, a bit cooler with showers Wednesday night through Thursday night,
- Then mostly cloudy and a bit warmer with showers likely (70%) Friday through Saturday.
- highs 50-46 warming to 54 Saturday lows 40-43. (seasonal averages high 52 low 40)
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Forecast for the Cascades in Lane County:
- Mostly cloudy with a slight (20%) chance of snow tonight,
- Mostly cloudy with AM snow, rain and snow (3-7 in. of snow possible) Sunday afternoon and a bit warmer and breezy (S 15-25 mph gusts to 50 mph), a good (50%) chance of rain and snow showers Sunday night (0.25 in. of rain possible, 2 in. of snow possible),
- Mostly cloudy and a bit cooler with a good (50%) chance of rain and snow showers Monday (1 in. of snow possible), a slight (20%) chance of evening rain and snow showers, just mostly cloudy at night,
- Cloudy with a good (50%) chance of AM rain and snow, a bit warmer with rain and snow Tuesday afternoon, rain and snow likely (70%) Tuesday night.
- snow level 2,500 ft. tonight and Sunday, 3,000 ft. Sunday night and Monday, 2,500 ft. Monday night, 3,500 ft. rising to 5,000 ft. Tuesday afternoon, then 5,500 ft. Tuesday night.
- lows 25-23 warming to 32 Tuesday night highs 35-33 warming to 36 Tuesday.
- Mostly cloudy with rain and snow and a bit cooler Wednesday, rain and snow showers and a bit cooler Wednesday night,
- Snow showers likely (70%) and a bit cooler Thursday, cloudy with a good (50%) chance of rain and snow showers at night and Friday (a bit warmer), a (30%) chance of snow showers at night,
- The rain and snow showers likely (70%) and a bit warmer Saturday.
- snow level 5,000 ft. Wednesday, 3,5,00 ft. Wednesday night, at the surface Thursday through Friday night, then 4,000 ft. Saturday.
- highs 35-29 warming to 37 Saturday lows 24-27.
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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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