Check out my latest Eugene Daily News Weather Or Not column You Won’t Find This W.A.T.C.H. List At The Airport
__________
Here is my weekly weather quiz question for the last time. What is “Condensation?” Here is the correct answer. Condensation is in general, the physical process by which a vapor becomes a liquid or solid; the opposite of evaporation, although on the molecular scale, both processes are always occurring. I’ll have a new weekly weather 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.
________________
An Upper Level Low Pressure Trough (Shaded “U” shape with blue arrows) has taken control as Upper Level High Pressure (Shaded “U” shape with blue arrows) offshore moves eastward and weakens. The graphics for days days 1-3 show the complex frontal system moving into Oregon followed closely by another frontal segment. The graphics for days 3-7 show a set of complex frontal systems with one to our east and the other approaching the Pacific Northwest next Friday.
NOTE: Hoodoo Ski Area opened Friday.
________________
Air Quality Index:
Eugene/Springfield: The Air Quality Index is 14 in the Good category measuring Particulate Matter.
Oakridge: The Air Quality Index is 29 in the Good category measuring Particulate Matter.
Cottage Grove: The Air Quality Index is 13 in the Good category measuring Particulate Matter.
Data courtesy of Lane Regional Air Protection Agency (LRAPA)
__________________
Home Wood Heating Advisory:
(Posted Daily)
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
________________
Advisories:
- 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.
________________
Forecast for the Southern and lower Mid Willamette Valley including Eugene-Springfield and Albany-Corvallis:
- Mostly cloudy with a good (50%) chance of AM rain, partly cloudy and a bit warmer this afternoon (under 0.10 in.of rain possible), partly cloudy this evening, mostly cloudy with patchy freezing fog and a slight (20%) chance of rain, freezing rain,or sleet late tonight,
- Cloudy with rain and a bit cooler Sunday afternoon and Sunday night,
- Mostly cloudy with a good (50%) chance of AM rain, a good (50%) chance of showers and a bit cooler Monday afternoon (Christmas Day), slight (20%) chance of evening showers, just mostly cloudy late Monday night.
- highs near 44 lows 34-36 cooling to 28 Monday night.
- A mix of clouds and sun Tuesday, mostly cloudy with a (30%) chance of rain at night,
- Mostly cloudy with a (40%) chance of rain and a bit warmer Wednesday through Thursday, a (30%) chance of rain Thursday night,
- Then mostly cloudy with a good (50%) chance of rain Friday.
- highs 40-45 lows near 33. (seasonal averages high 45 low 33)
_________________
Forecast for Roseburg:
- Mostly cloudy with patchy fog this AM, just mostly cloudy a bit warmer this afternoon, patchy fog late tonight,
- Cloudy with patchy AM fog and a slight (20%) chance of rain, rain Sunday afternoon, likely (70%) in the evening, mostly cloudy with a good (50%) chance of rain late Sunday night (snow level 3,500 ft. late at night),
- Mostly cloudy with a slight (20%) chance of AM showers, partly cloudy and a bit warmer with a slight (20%) chance of showers (snow level 3,500 ft.) Monday afternoon (Christmas Day), then just partly cloudy Monday night.
- highs 45-47 lows 38-33.
- Mostly cloudy and a bit cooler with patchy AM fog and freezing fog, just partly cloudy Tuesday afternoon, mostly cloudy with a slight (20%) chance of rain Tuesday night and Wednesday, a slight (20%) chance of rain Wednesday afternoon and just mostly cloudy at night,
- Mostly cloudy with a slight (20%) chance of rain Thursday and Thursday night,
- Then mostly cloudy with a (30%) chance of rain Friday.
- highs 45-48 lows 36-39. (seasonal averages high 47 low 36)
_____________________
Forecast for The South Oregon Coast Including Coos Bay and North Bend:
- Patchy fog, mostly cloudy and a bit warmer today today, mostly cloudy tonight,
- Cloudy with AM (30%) chance of AM rain, rain Sunday afternoon, a good (50%) chance of coastal rain at night while a (30%) of inland rain Sunday night,
- Mostly cloudy with a slight (20%) chance AM showers, partly cloudy and a bit warmer with a slight (20%) chance of showers Monday afternoon (Christmas Day), then just partly cloudy at night.
- highs near 52 lows 40-37.
- Mostly cloudy with patchy AM fog, partly cloudy Tuesday afternoon, a slight (20%) chance of rain Tuesday night and Wednesday, just mostly cloudy Wednesday night.
- Mostly cloudy and a bit warmer with a slight (20%) chance of rain Thursday and Thursday night,
- Then mostly cloudy with a (40%) chance of rain Friday.
- highs near 52 lows 40-42. (seasonal averages high 51 low 40)
________________
Forecast for the Cascades in Lane County:
- A good (50%) chance of snow this AM, a mix of clouds and sun this afternoon, mostly cloudy with a slight (20%) chance of snow late tonight,
- Cloudy with a (40%) chance of AM rain and snow, rain or snow likely (70%) and a bit warmer Sunday afternoon and evening, a good (50%) chance of rain or snow late Sunday night,
- Mostly cloudy with AM rain or snow likely (70%), a bit warmer with showers likely (70%) Monday afternoon (Christmas Day), then partly cloudy with a slight (20%) chance of snow showers at night.
- snow level at the surface today, 3,500 ft. 3,500 ft. tonight, 3,500 ft. rising to 4,000 ft. Sunday, 5,000 ft. falling to 4,000 ft. Sunday night, 3,000 ft. Monday, then 2,500 ft. Monday evening.
- highs 32-35 cooling back to 32 Monday lows 25-20.
- A mix of clouds and sun Tuesday, mostly cloudy with a (30%) chance of rain and snow Tuesday night,
- Mostly cloudy with a good (50%) chance of rain and snow Wednesday, a (40%) chance of rain and snow Wednesday night,
- Mostly cloudy with a good (50%) chance of rain and snow Thursday, a (30%) chance of rain and snow at night,
- Then mostly cloudy with a good (50%) chance of rain and snow Friday.
- free air freezing level 5,000 ft. Tuesday, snow level 3,500 ft. Tuesday night and Wednesday, 4,000 ft. Wednesday night, 3,500 ft. Thursday, 4,500 ft. Thursday night, then 5,000 ft. Friday.
- highs near 34 lows near 25.
________________
**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.
________________
Get your local Eugene-Springfield and Lane County news on-line at eugenedailynews.com.
________________