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) has taken over 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 Saturday.
Note: The overnight air quality in 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 129 in the Unhealthy for Sensitive Groups category measuring Particulate Matter.
Oakridge: The Air Quality Index is 149 in theUnhealthy for Sensitive Groups category measuring Particulate Matter.
Cottage Grove: The Air Quality Index is 87 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: YELLOW – Caution Is Advised.
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.
- 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, THE EASTERN COLUMBIA RIVER GORGE, THE LOWER COLUMBIA BASIN OF OREGON, THE JOHN DAY BASIN, AND NORTH CENTRAL OREGON.
- AN AIR STAGNATION ADVISORY IS IN EFFECT
- 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:
- Clouds with areas of AM fog and freezing fog, mostly sunny with patchy lingering fog this afternoon, mostly cloudy with areas of fog and freezing fog late tonight and Sunday AM, mostly cloudy and a bit warmer with patchy fog in the afternoon, mostly clear in the evening, areas of fog and freezing fog late at night,
- Areas of AM freezing fog, a mix of clouds and sun and a bit warmer Monday afternoon, then partly cloudy with patchy fog and freezing fog Monday night.
- highs 43-45 lows 26-30.
- Patchy AM fog and freezing fog, partly cloudy with patchy lingering fog and a bit warmer Tuesday afternoon, mostly cloudy with areas of fog and freezing fog late at night and 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,
- Areas of AM fog and freezing fog, a mix of clouds and sun with patchy afternoon fog Thursday, mostly cloudy with areas of fog and freezing fog late at night,
- Areas of AM fog and freezing fog, then a mix of clouds and sun Friday afternoon.
- highs near 46 lows 30-33 cooling back to 30 Wednesday night warming back to 33 Thursday night. (seasonal averages high 46 low 34)
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Forecast for Roseburg:
- Partly cloudy with areas of AM fog, sunny and a bit warmer this afternoon, mostly clear this evening, partly cloudy with patchy fog late tonight,
- Partly cloudy with areas of AM fog, sunny and a bit warmer Sunday afternoon, mostly clear with patchy fog Sunday night,
- Areas of AM fog, mostly sunny and a bit warmer Monday, then mostly clear with areas of fog at night.
- highs 40-52 lows near 35.
- Partly cloudy with areas of AM fog, sunny and a bit cooler Tuesday afternoon, mostly clear with areas of fog and freezing fog Tuesday night,
- Areas of AM and late night fog and freezing fog, mostly sunny and a bit warmer Wednesday and Thursday (a bit cooler) afternoons, mostly clear both nights,
- Patchy AM fog, then just partly cloudy Friday afternoon.
- highs 48-52 cooling back to 48 Friday lows near 36. (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 areas of AM fog, sunny this afternoon, clear tonight,
- Partly cloudy with areas of AM fog, sunny and a bit cooler Sunday afternoon and Monday, clear and colder at night,
- highs 65-59 lows near 38-40.
- Partly cloudy with areas of AM fog, sunny and a bit cooler Tuesday and Wednesday, clear and colder at night,
- Partly cloudy with areas of AM fog, sunny Thursday afternoon, mostly clear Thursday night,
- Mostly cloudy with patchy AM fog, then partly cloudy and a bit cooler Friday afternoon.
- highs 57-52 lows near 40. (seasonal averages high 51 Low 40)
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Forecast for the Cascades in Lane County:
- Mostly sunny and a bit cooler today, mostly clear tonight,
- Sunny Sunday, clear at night,
- Mostly sunny Monday, then mostly clear Monday night.
- free air freezing level 11,000 ft. rising to 12,000 ft. today, 12,000 ft. tonight and Sunday, 13,000 ft. falling to 12,000 ft. Sunday night, then 12,000 ft. Monday and Monday night.
- highs near 45 lows 30-32.
- Sunny Tuesday, mostly clear at night,
- Mostly sunny Wednesday, mostly clear Wednesday night,
- Mostly sunny and a bit warmer Thursday, then partly cloudy Thursday night and Friday.
- free air freezing level 12,000 ft. Tuesday, 13,000 ft. Tuesday night through Thursday night, then 12,000 ft. Friday.
- highs 44-46 cooling back to 44 Friday lows near 33.
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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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