Check out my latest Eugene Daily News Weather Or Not column
http://eugenedailynews.com/2017/12/promise-promise-not-awh-forget/
__________
Here is my weekly weather quiz question for the last time. What is a “Continental Air Mass?” Here is the correct answer. A Continental Air Mass is a dry air mass originating over a large land area. Contrast with tropical air mass. I’ll have a new weekly weather 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.
________________
Upper Level High Pressure (Shaded “Arch” shape with blue arrows) continues sending us waves of moisture and cooler air. The graphics for days days 1-3 show the set up of the next frontal system moving toward the Pacific Northwest. The graphics for days 3-7 show a break from major frontal systems into the end of next week until a storm moves in next Sunday.
NOTE: Hoodoo Ski Area is open and Mt. Ashland Ski area is open for sledding. Not enough snow yet at Willamette Pass Ski Area.
________________
Air Quality Index:
Eugene/Springfield: The Air Quality Index is 27 in the Good category measuring Particulate Matter.
Oakridge: The Air Quality Index is 58 in the Good category measuring Particulate Matter.
Cottage Grove: The Air Quality Index is 1 in the Good category measuring Particulate Matter.
Data courtesy of Lane Regional Air Protection Agency (LRAPA)
__________________
Home Wood Heating Advisory:
(Posted Daily)
Eugene-Springfield: GREEN – Burning Is Allowed.
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 DENSE FOG ADVISORY IS IN EFFECT UNTIL 11 AM TODAY FOR THE SOUTH WILLAMETTE VALLEY.
- AN AIR STAGNATION ADVISORY IS IN EFFECT NOON TUESDAY FOR THE SOUTH CENTRAL OREGON COAST, CENTRAL DOUGLAS COUNTY, EASTERN CURRY COUNTY, JOSEPHINE COUNTY, THE EASTERN DOUGLAS COUNTY FOOTHILLS, JACKSON COUNTY, THE KLAMATH BASIN, 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.
________________
Forecast for the Southern and lower Mid Willamette Valley including Eugene-Springfield and Albany-Corvallis:
- Partly cloudy and colder with areas of fog and freezing fog this AM, partly cloudy and cooler with patchy lingering fog this afternoon, partly cloudy this evening, mostly cloudy with areas of fog and freezing fog late tonight (New Year’s Eve) and Monday AM, a mix of clouds and sun and a bit warmer Monday afternoon (New Year’s Day), partly cloudy in the evening, mostly cloudy with areas of fog and freezing fog late Monday night and Tuesday AM, mostly cloudy and a bit warmer in the afternoon, then mostly cloudy with a slight (20%) chance of rain Tuesday night.
- highs 40-45 lows 32-34.
- Areas of AM fog, mostly cloudy and a bit warmer and a slight chance of rain Wednesday, a (40%) chance rain at night,
- Cloudy and a bit warmer with a good (50%) chance of rain Thursday, then mostly cloudy with a good (50%) chance of rain Thursday night through Saturday,
- highs 46-48 lows near 36. (seasonal averages high 45 low 34)
_________________
Forecast for Roseburg:
- Partly cloudy with areas of fog this AM, mostly cloudy and a bit cooler with patchy lingering fog this afternoon, areas of fog late tonight (New Year’s Eve) and Monday AM, mostly cloudy and a bit cooler with patchy fog Monday afternoon (New Year’s Day), patchy fog late at night,
- Mostly cloudy with patchy AM and late night fog, then a bit warmer with lingering fog Tuesday afternoon and mostly cloudy Tuesday night.
- highs 48-45 warming back to 48 Tuesday lows 40-42.
- Mostly cloudy with patchy AM and late night fog, then a bit warmer with lingering fog Wednesday afternoon, a (%) chance of rain Wednesday night and Thursday, then mostly cloudy with a (30%) chance of rain and a bit cooler Thursday night through Saturday.
- highs 54-50 lows 44-39. (seasonal averages high 48 low 36)
_____________________
Forecast for The South Oregon Coast Including Coos Bay and North Bend:
- Partly cloudy and cooler with areas of fog this AM, mostly cloudy and a bit cooler with patchy inland afternoon fog, areas of fog late tonight (New Year’s Eve) and Monday AM, mostly cloudy and a bit warmer Monday afternoon (New Year’s Day), patchy fog late at night,
- Patchy AM fog, mostly cloudy and a bit warmer Tuesday, patchy fog with a slight (20%) chance of showers late at night.
- highs 54-57 lows 45-42 warming to 44 Tuesday night.
- Patchy AM fog, mostly cloudy and a bit warmer Wednesday, mostly cloudy with a (30%) chance of rain Wednesday night through Thursday night,
- Mostly cloudy with a (40%) chance of rain Friday and Friday night,
- Then a bit cooler with a (30%) chance of rain Saturday.
- highs 58-55 lows 48-42. (seasonal averages high 51 low 40)
________________
Forecast for the Cascades in Lane County:
- Partly cloudy today and tonight (New Year’s Eve),
- A mix of clouds and sun and a bit warmer Monday (New Year’s Day), partly cloudy in the evening, mostly cloudy late Monday night and Tuesday, then mostly cloudy with a slight (20%) chance of rain at night.
- free air freezing level 4,000 ft. rising to 6,500 ft. this afternoon, 7,500 ft. tonight, 7,000 ft. rising to 7,500 ft. Monday afternoon, 8,000 ft. Monday night, 8,000 ft. rising to 9,000 ft. Tuesday, then snow level 8,000 ft. Tuesday night.
- highs 38-42 lows 29-32.
- Mostly cloudy and a bit cooler with a slight (20%) chance of rain Wednesday, mostly cloudy with a good (50%) chance of rain Wednesday night and Thursday, a (40%) chance of rain Thursday night,
- Mostly cloudy with a good (50%) chance of rain Friday and Friday night,
- Then a good (50%) chance of rain and snow and a bit cooler Saturday.
- snow level 8,000 ft. Wednesday and Wednesday night, 7,500 ft. Thursday, 7,000 ft. Thursday night and Friday, 6,500 ft. Friday night, then 5,500 ft. Saturday.
- highs 40-38 lows 32-29.
________________
**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.
________________