Dec
12.
Here is my weekly weather quiz question. What is a “Tornado Vortex Signature “?
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An Upper Level Low Pressure Trough (“U” shape) is moving toward the Pacific Northwest. The graphics for days 1-3 show a frontal system moving through the Pacific Northwest Friday and Saturday. The graphics for days 3-7 Sunday through Thursday show a complex frontal system will be marching through Monday and Monday night with a complex frontal system just offshore next Thursday.
Note: Ski Report: Willamette Pass, Hoodoo, and Mt. Ashland are all open for the ski season. Check their Web sites for specific mountain conditions and hours of operation.
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Air Quality Index:
Eugene/Springfield: The Air Quality Index is 86 in the Moderate category measuring Particulate Matter.
Oakridge: The Air Quality Index is 26 in the Good category measuring Particulate Matter.
Cottage Grove: The Air Quality Index is 71 in the Moderate category measuring Particulate Matter.
Data courtesy of Lane Regional Air Protection Agency (LRAPA.org)
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ADVISORIES:
- A HIGH WIND WARNING IS IN EFFECT FROM 7 AM UNTIL 7 PM FRIDAY FOR THE SOUTH CENTRAL OREGON COAST AND THE CURRY COUNTY COAST.
- A WINTER WEATHER ADVISORY IS IN EFFECT UNTIL 7 PM TONIGHT FOR THE FOOTHILLS OF THE NORTHERN BLUE MOUNTAINS OF OREGON AND FOR THE FOOTHILLS OF THE SOUTHERN BLUE MOUNTAINS OF OREGON.
- A WINTER WEATHER ADVISORY IS IN EFFECT UNTIL 7 PM TONIGHT FOR NORTH CENTRAL OREGON.
- AN AIR STAGNATION ADVISORY IS IN EFFECT UNTIL 2 PM FRIDAY FOR THE OREGON LOWER TREASURE VALLEY.
- A WIND ADVISORY IS IN EFFECT FROM 4 PM FRIDAY UNTIL 7 AM SATURDAY FOR NORTHERN AND EASTERN KLAMATH COUNTY AND WESTERN, CENTRAL AND EASTERN LAKE COUNTY.
- A WIND ADVISORY IS IN EFFECT FROM 7 AM UNTIL 10 PM FRIDAY FOR THE ROGUE VALLEY OF JACKSON COUNTY.
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HEALTH 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.
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Forecast for the Southern and lower Mid Willamette Valley including Eugene-Springfield and Albany-Corvallis:
- Mostly cloudy with a slight (20%) chance of rain late tonight (under 0.10 in. of rain possible),
- Mostly cloudy with a (30% ) of AM rain, a bit warmer with rain Friday afternoon (0.25 in. of rain possible), rain Friday night (0.50 in. of rain possible),
- Mostly cloudy and a bit cooler with showers Saturday (0.25 in. of rain possible), showers at night (under 0.10 in. of rain possible),
- A mix of clouds and sun and a bit cooler with a slight (20%) chance of showers Sunday, then cloudy with a (40%) chance of rain Sunday night.
- lows 38-43 cooling to 36 Saturday night and Sunday night highs 52-47.
- Mostly cloudy and a bit cooler with rain likely (70%) Monday, cloudy with rain Monday night,
- Mostly cloudy and a bit warmer with a good (50%) chance of rain Tuesday, a slight (20%) chance of rain at night,
- Mostly cloudy with a (30%) chance of AM rain, partly cloudy with a (30%) chance of rain Wednesday, a slight (20%) chance of rain Wednesday night,
- Mostly cloudy with a (30%) chance of AM rain, then a mix of clouds and sun and a bit cooler with a (30%) chance of rain Thursday afternoon.
- highs 46-50 cooling to 48 Thursday lows 40-37. (seasonal averages high 47 low 34)
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Your College Football Weather Forecast:
Wednesday January 1, 2025:
The Ducks will play either #8 Ohio State or #9 Tennessee in the Rose Bowl, Pasadena, California: Game time to be announced. Way too soon for a preliminary weather forecast.
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HOME WOOD HEATING ADVISORY:
Eugene & Springfield: GREEN – The burning wood is allowed.
Oakridge and Westfir: GREEN – The burning wood is allowed.
The use of pellet stoves is always allowed.
Data courtesy of Lane Regional Air Protection Agency (LRAPA.org)
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Forecast for the Umpqua Valley including Roseburg:
- Mostly cloudy with a good (50%) chance of late evening rain, rain late tonight (under 0.10 in. of rain possible),
- Mostly cloudy and a bit cooler with rain (under 0.10 in. of rain possible) Friday, rain at night (0.50 in. of rain possible, snow level 3,500 ft. late at night),
- Mostly cloudy and a bit cooler with rain (0.25 in. of rain possible)Saturday (snow level 3,500 ft.), evening showers, a good (50%) chance of rain and snow showers late Saturday night (under 0.10 in. of rain possible),
- Partly cloudy with a slight (20%) chance of AM rain, just mostly cloudy a bit cooler Sunday afternoon, mostly cloudy a (40%) of rain Sunday night.
- lows 40-43 cooling to 36 Saturday night warming to 30 Sunday night highs 53-47.
- Mostly cloudy with rain Monday, rain likely (70%), Monday night,
- Mostly cloudy with a (40%) chance of rain and a bit warmer Tuesday, a slight (20%) chance of rain at night,
- Mostly cloudy with slight (20%) chance of rain Wednesday, a slight (20%) chance of rain Wednesday night,
- Then mostly cloudy and a bit warmer with a slight (20%) chance of rain Thursday.
- highs 47-53 lows 42-39. (seasonal averages high 48 low 37)
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Forecast for The South Oregon Coast Including Coos Bay and North Bend:
- Cloudy with a slight (20%) chance of evening coastal showers, a good (50%) chance of late evening rain, rain late tonight (under 0.10 in. of rain possible) ,
- Mostly cloudy with rain (0.10 in. of rain possible) and a bit cooler and windy Friday (Wind: S 20-30 mph gusts to 45 mph), rain (0.10 in. of rain possible) Friday night,
- Mostly cloudy and a bit cooler with rain Saturday (0.25 in. of rain possible), evening showers, a good (50%) chance of coastal showers late at night while inland showers likely (70%) late at night (0.10 in. of rain possible),
- Some AM clouds with a slight (20%) chance of rain, mostly cloudy and a bit cooler with a slight (20%) chance of rain Sunday and in the evening, then rain likely (70%) late Sunday night.
- lows 42-43 cooling to 38 Saturday warming to 42 Sunday night highs 58-52.
- Mostly cloudy with rain Monday and in the evening, rain likely (70%) late Monday night,
- Mostly cloudy and a bit warmer with a good (50%) chance of rain Tuesday, a (30%) chance of rain at night,
- Mostly cloudy with a (30%) chance of rain and a bit warmer Wednesday, a slight (20%) chance of rain Wednesday night,
- Then mostly cloudy and a bit warmer with a slight (20%) chance of rain Thursday.
- highs 53-62 lows near 44. (seasonal averages high 53 low 40)
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Forecast for the Northern Oregon Cascades including the Cascades in Lane County:
- Mostly cloudy with a slight (20%) of evening freezing rain, just mostly cloudy late tonight (under 0.10 in. of rain possible),
- Mostly cloudy with a slight (20%) chance of AM rain and snow with a slight (20%) chance of freezing rain, rain and snow and freezing rain Friday afternoon (0.25 in. of snow possible, 1 in. of snow possible), evening freezing rain, rain and snow Friday night (0.75 in. of rain possible, 1-4 in. of snow possible, trace of ice accumulation possible),
- Mostly cloudy and a bit cooler with rain and snow showers Saturday, snow and rain showers at night,
- A mix of clouds and sun and a bit cooler with a good (50%) chance of snow showers Sunday, then a (40%) chance of snow and rain Sunday night.
- free air freezing level 5,000 ft. falling to 4,500 ft. late tonight, snow level 4,500 ft. rising to 5,500 ft. Friday afternoon, 4,000 ft Friday night and Saturday, 2,500 ft. Saturday night and Sunday, then 3,500 ft. Sunday night.
- lows 25-30 cooling to 23 Saturday night warming to 25 Sunday night highs 35-32.
- Mostly cloudy and a bit warmer with rain and snow Monday, rain and snow likely (70%) Monday night,
- Mostly cloudy and a bit warmer with a good (50%) chance of rain and snow Tuesday, a slight (20%) chance of rain and snow at night,
- A mix of clouds and sun and a bit warmer with a (40%) chance of rain and snow Wednesday, partly cloudy with a slight (20%) chance of evening rain, mostly cloudy with a slight (20%) chance of rain Wednesday night,
- Then mostly sunny with a (30%) chance of rain and a bit warmer Thursday.
- snow level 4,000 ft Monday, 4,500 ft. Monday night, 5,000 ft. Tuesday, 5,500 ft. Tuesday night, 6,500 ft. Wednesday, then 7,000 ft. Wednesday night and Thursday.
- highs 33-40 lows 25-27.