Check out my latest Eugene Daily News Weather Or Not column “I Can See Clearly Now,” But For How Long?
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Here is my weekly weather quiz question for the last time. What is “Coalescence?” Here is the correct answer. Coalescence is the process by which water droplets in a cloud collide and come together to form raindrops. I’ll have a new weekly weather question 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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Upper Level High Pressure (Shaded “Arch” shape with blue arrows) is still in control producing sinking air the result of which is late night and early AM fog with freezing fog in many locations. The graphics for days 3-7 show that high pressure will extend right down to the surface keeping us out dry through next week and a frontal system moving in next Saturday.
Note: The overnight air quality in Eugene/Springfield and Oakridge has become bad enough for a Red Home Wood Heating Advisory to be issued and continued for another day.
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Air Quality Index:
Eugene/Springfield: The Air Quality Index is 78 in the Moderate category measuring Particulate Matter.
Oakridge: The Air Quality Index is 68 in the Moderate category measuring Particulate Matter.
Cottage Grove: The Air Quality Index is 61 in the Moderate category measuring Particulate Matter.
Data courtesy of Lane Regional Air Protection Agency (LRAPA)
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Home Wood Burning Advisory:
(Posted Daily)
Eugene-Springfield: RED – Burning Prohibited. No Visible Smoke Allowed From A Chimney On A Residential Home.
Oakridge: RED – Burning Prohibited. No Visible Smoke Allowed From A Chimney On A Residential Home.
*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:
- AN AIR STAGNATION ADVISORY IS IN EFFECT UNTIL 2 PM THURSDAY FOR THE LOWER COLUMBIA, THE CENTRAL WILLAMETTE VALLEY AND THE SOUTH WILLAMETTE VALLEY.
- A FREEZING FOG ADVISORY IS IN EFFECT UNTIL NOON TODAY FOR NORTH CENTRAL OREGON, AND CENTRAL OREGON.
- A DENSE FOG ADVISORY IS IN EFFECT UNTIL 10 AM TODAY FOR CENTRAL DOUGLAS COUNTY, EASTERN CURRY COUNTY, JOSEPHINE COUNTY, JACKSON COUNTY.
- AN AIR STAGNATION ADVISORY IS IN EFFECT UNTIL 2 PM THURSDAY FOR CENTRAL DOUGLAS COUNTY, EASTERN CURRY COUNTY, JOSEPHINE COUNTY, JACKSON COUNTY, THE KLAMATH BASIN, NORTHERN AND EASTERN KLAMATH COUNTY, AND WESTERN, CENTRAL, AND EASTERN LAKE COUNTY.
- AN AIR STAGNATION ADVISORY IS IN EFFECT UNTIL NOON TUESDAY FOR NORTH CENTRAL OREGON AND CENTRAL OREGON THE EASTERN COLUMBIA RIVER GORGE, THE LOWER COLUMBIA BASIN OF OREGON, THE JOHN DAY BASIN, AND NORTH CENTRAL OREGON.
- AN AIR QUALITY ADVISORY IS IN EFFECT UNTIL FURTHER NOTICE FOR NORTHERN HARNEY COUNTY, THE LOWER TREASURE VALLEY OF OREGON, AND THE BAKER VALLEY. ELEVATED POLLUTANT LEVELS ARE EXPECTED TO REMAIN AS HIGH PRESSURE PRODUCES SUBSIDENCE THAT HOLDS THE POLLUTANTS AT THE SURFACE.
- 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 cloudy with areas of dense fog and freezing fog this AM, mostly sunny and a bit warmer with some patchy lingering fog this afternoon, mostly clear in the evening, patchy fog late tonight,
- Mostly cloudy with AM patchy freezing fog, a mix of clouds and sun with patchy lingering fog Monday afternoon, partly cloudy with patchy fog Monday night,
- Patchy AM dense freezing fog, mostly sunny with patchy lingering fog Tuesday afternoon, then mostly cloudy with areas of fog and freezing fog late at night.
- highs near 40 lows 23-26.
- Mostly cloudy with areas of fog and freezing fog Wednesday AM, a mix of clouds and sun with lingering patchy fog in the afternoon, mostly cloudy with areas of fog and freezing fog Wednesday night and Thursday AM, a mix of clouds and sun and a bit warmer with patchy afternoon lingering fog, mostly cloudy with a slight (20%) chance of rain at night,
- A mix of clouds and sun with a (30%) chance of rain and a bit warmer Friday, mostly cloudy with a (30%) chance of rain Friday night,
- Then mostly cloudy with a (40%) chance of rain Saturday.
- highs 40-49 lows 27-35. (seasonal averages high 46 low 34)
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Forecast for Roseburg:
- Partly cloudy with areas of fog and freezing fog this AM, sunny and a bit warmer today with patchy lingering fog this afternoon, mostly clear with patchy fog and freezing fog tonight,
- Partly cloudy with areas of AM fog and freezing fog, sunny and a bit warmer Monday afternoon, mostly clear with areas of fog late at night,
- Partly cloudy with areas of AM fog, sunny Tuesday afternoon, mostly clear with areas of fog and freezing fog late Tuesday night.
- highs 40-42 lows 28-34.
- Areas of AM and late night fog and freezing fog, mostly sunny and a bit warmer Wednesday, mostly clear with areas off and freezing fog Wednesday night,
- Areas of fog and freezing fog Thursday AM, partly cloudy and a bit warmer in the afternoon, partly cloudy with a slight (20%) chance of rain Thursday night and Friday (a bit warmer), mostly cloudy with a slight (20%) chance of rain at night,
- Then mostly cloudy and a bit cooler with a (30%) chance of rain Saturday.
- highs 46-49 cooling back to 46 Saturday lows 37-39. (seasonal averages high 48 low 37)
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Forecast for The South Oregon Coast Including Coos Bay and North Bend:
- Partly cloudy with patchy AM coastal frost, sunny and a bit warmer this afternoon, clear tonight,
- Partly cloudy with areas of AM fog, sunny Monday afternoon, clear and colder Monday night,
- Partly cloudy with areas of AM fog, sunny Tuesday, mostly clear and colder at night,
- highs near 60 lows near near 38.
- Partly cloudy with patchy AM fog, sunny and a bit cooler Wednesday, clear and colder at night,
- Areas of AM fog, partly cloudy and a bit cooler Thursday afternoon, a slight (20%) chance of rain Thursday night,
- Mostly cloudy with a slight (20%) chance of rain Friday AM, partly cloudy and a bit cooler with a slight (20%) chance of rain in the afternoon, mostly cloudy with a slight (20%) chance of evening rain, partly cloudy with a slight (20%) chance of rain at night,
- Then mostly cloudy and a bit cooler with a (40%) chance of rain Saturday.
- highs 56-52 lows 38-42. (seasonal averages high 51 Low 40)
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Forecast for the Cascades in Lane County:
- Mostly sunny today, Monday, and Tuesday, mostly clear each night,
- free air freezing level 12,000 ft. rising to 13,000 ft.late this afternoon, 13,000 ft. falling to 12,000 ft. tonight, 12,000 ft. Monday through Tuesday, then 11,000 ft. Tuesday night.
- highs 38-40 lows 25-28.
- Mostly sunny Wednesday, mostly clear Wednesday night,
- Mostly sunny and a bit warmer Thursday, mostly cloudy with a (30%) chance of rain Thursday night,
- A mix of clouds and sun with a (40%) chance of rain and snow Friday, mostly cloudy with a (40%) chance of rain and snow Friday night,
- Then mostly cloudy and a bit cooler with a (40%) chance of rain Saturday.
- free air freezing level 12,000 ft. Wednesday, 13,000 ft. Wednesday night, 12,000 ft. Thursday, snow level above 8,000 ft. Thursday night, 5,500 ft. Friday, 4,500 ft. Friday night, then 6,500 ft. Saturday.
- highs 40-43 cooling to 38 Saturday lows 29-33 cooling back to 29 Friday 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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