Dec
13.
Here is my weekly weather quiz question. What is a “Tornado Vortex Signature “?
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An Upper Level High Pressure Ridge (“Arch” shape) is sending moisture to the Pacific Northwest. The graphics for days 1-3 show a frontal system moving through the Pacific Northwest tonight and Saturday. The graphics for days 3-7 Monday through Friday show frontal activity continuing through the period.
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 47 in the Good category measuring Particulate Matter.
Oakridge: The Air Quality Index is 53 in the Moderate category measuring Particulate Matter.
Cottage Grove: The Air Quality Index is 48 in the Good 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 UNTIL 7 PM THIS EVENING FOR THE SOUTH CENTRAL OREGON COAST AND THE CURRY COUNTY COAST.
- A WINTER WEATHER ADVISORY FOR FREEZING RAIN IS IN EFFECT UNTIL 2 AM SATURDAY FOR THE UPPER HOOD RIVER VALLEY.
- A WINTER WEATHER ADVISORY IS IN EFFECT FOR MODERATE TO HEAVY SNOW AND MIXED PRECIPITATION UNTIL 10 AM SATURDAY FOR THE EAST SLOPES OF THE OREGON CASCADES.
- A WINTER WEATHER ADVISORY IS IN EFFECT FOR MODERATE TO HEAVY SNOW AND MIXED PRECIPITATION FOR THE FOOTHILLS OF THE SOUTHERN BLUE MOUNTAINS OF OREGON AND NORTH CENTRAL OREGON.
- A WINTER WEATHER ADVISORY IS IN EFFECT FROM 8 PM TONIGHT UNTIL 7 AM SUNDAY ABOVE 4,500 FT. FOR THE NORTHERN BLUE MOUNTAINS OF OREGON AND THE NORTHWEST BLUE MOUNTAINS.
- A WIND ADVISORY IS IN EFFECT UNTIL 7 AM SATURDAY FOR NORTHERN AND EASTERN KLAMATH COUNTY AND WESTERN, CENTRAL AND EASTERN LAKE COUNTY.
- A WIND ADVISORY IS IN EFFECT UNTIL 10 AM SATURDAY FOR THE FOOTHILLS OF THE NORTHERN BLUE MOUNTAINS OF OREGON
- A WIND ADVISORY IS IN EFFECT UNTIL 10 AM SATURDAY FOR THE GRANDE RONDE VALLEY.
- A WIND ADVISORY IS IN EFFECT UNTIL 10 PM TONIGHT FOR THE ROGUE VALLEY OF JACKSON COUNTY.
- A COASTAL FLOOD ADVISORY IS IN EFFECT FROM 9 AM UNTIL 1 PM SATURDAY FOR THE CLATSUP COUNTY COAST AND THE TILLAMOOK COAST.
- A HIGH SURF ADVISORY IS IN EFFECT FROM 10 PM TONIGHT UNTIL 10 PM SATURDAY FOR THE SOUTH CENTRAL OREGON COAST.
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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 rain tonight (0.50 in. of rain possible),
- Mostly cloudy and slightly warmer with showers and a slight (20%) chance of thunderstorms Saturday afternoon and evening (0.25 in. of rain possible), showers likely (70%) late Saturday night (under 0.10 in. of rain possible),
- Some possible AM clouds and sun with a slight (20%) chance of showers, mostly cloudy with a slight (20%) chance of showers Sunday afternoon (under 0.10 in. of rain possible), rain at night (0.10 in. of rain possible).
- Mostly cloudy with rain Monday, then rain Monday night.
- lows 43-37 warming to 42 Tuesday night highs near 49.
- Mostly cloudy and a bit warmer with a (40%) chance of showers Tuesday, a slight (20%) chance of showers Tuesday night,
- Mostly cloudy and a bit cooler with a slight (20%) chance of showers Wednesday, mostly cloudy at night,
- Mostly cloudy and a bit cooler Thursday and Thursday night,
- Then mostly cloudy and a bit warmer Friday.
- highs 53-48 warming to 50 Friday lows 40-36. (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 evening showers, showers likely (70%) late tonight (0.50 in. of rain possible, snow level 3,500 ft. late tonight),
- Mostly cloudy with a good (50%) chance of AM showers and a slight (20%) chance of thunderstorms, a bit cooler with showers (0.50 in. of rain possible) and a slight (20%) chance of thunderstorms Saturday afternoon, evening rain showers with snow showers likely (70%), rain and snow showers late Saturday night (0.10 in. of rain possible),
- Partly cloudy with patchy AM fog with a slight (20%) chance of AM showers, mostly cloudy a bit cooler with a slight (20%) chance of showers Sunday afternoon (0.10 in. of rain possible), cloudy a good (50%) chance of evening showers, showers late Sunday night (0.25 in. of rain possible, snow level 3,500 ft.),
- Mostly cloudy with showers Monday and in the evening, then a good (50%) chance of rain late Monday night.
- lows 43-37 warming to 42 Monday night highs 48-50.
- Mostly cloudy with a slight (20%) chance of AM showers, just mostly cloudy and a bit warmer Tuesday afternoon,mostly cloudy with patchy evening fog, areas of fog last Tuesday night,
- Areas of AM fog, mostly cloudy with slight (20%) chance of rain Wednesday, mostly cloudy with patchy fog at night,
- Partly cloudy and a bit warmer Thursday and in the evening, mostly cloudy with a slight (20%) chance of showers late Thursday night,
- Patchy AM fog then mostly cloudy with a (30%) chance of showers Friday.
- highs 53-56 lows near 40. (seasonal averages high 48 low 37)
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Forecast for The South Oregon Coast Including Coos Bay and North Bend:
- Mostly cloudy with evening coastal showers and a slight (20%) chance of thunderstorms with coastal showers and a slight (20%) chance of thunderstorms late tonight while early evening inland showers with late evening inland showers likely (70%) and a good (50%) chance of inland showers late tonight (0.50 in. of rain possible),
- Mostly cloudy with a (30%) chance of AM showers and a slight (20%) chance of thunderstorms, a bit cooler with showers likely (70%) and a slight (20%) chance of thunderstorms Saturday afternoon (0.10 in. of rain possible), evening showers with a slight (20%) chance of thunderstorms, showers with patchy fog late Saturday night (0.10 in. of rain possible),
- Some AM clouds with patchy fog, mostly cloudy and a bit cooler with a (30%) chance of coastal showers while a slight (20%) chance of inland showers and a bit warmer Sunday afternoon, cloudy with a good (50%) chance of evening showers, then showers late at night (0.25 in. of rain possible).
- Mostly cloudy with showers and a bit warmer Monday and in the evening, a good (50%) chance of showers late Monday night.
- lows 43-38 warming to 44 Monday night highs 54-56.
- Mostly cloudy and a bit warmer with a (30%) chance of showers Tuesday, a slight (20%) chance of showers Tuesday night,
- Mostly cloudy with a slight (20%) chance of showers and a bit warmer Wednesday and in the evening, patchy fog late at night,
- Partly cloudy and a bit warmer Thursday, mostly cloudy with a slight (20%) chance of showers Thursday night,
- Mostly cloudy with a (40%) chance of AM showers, then showers likely (70%) Friday afternoon.
- highs 60-63 lows 42-40 warming back to 42 Thursday night. (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 evening freezing rain, rain and snow (snow possibly heavy at times), rain with a slight (20%) chance of freezing rain tonight (1.00 in. of rain possible, 3-6 in. of snow possible, trace of ice accumulation possible),
- Mostly cloudy with AM rain showers and snow showers with a slight (20%) chance of AM freezing rain, snow showers and freezing rain Saturday afternoon, snow and rain showers Saturday night,
- A mix of clouds and sun with a good (50%) chance of AM snow showers, a slight (20%) chance of rain and snow showers Sunday afternoon, snow and rain likely (70%) at night,
- Mostly cloudy with rain and snow Monday, then rain and snow likely (70%) Monday night.
- snow level 5,000 ft. falling to 4,000 ft. late tonight, 3,500 ft. Saturday, 2,500 ft. Saturday night and Sunday, 3,500 ft. Sunday night, then 4,000 ft Monday and Monday night.
- lows 29-22 warming back to to 29 Tuesday night highs near 32.
- A mix of clouds and sun and a bit warmer with a good (50%) chance of rain and snow showers Tuesday, mostly cloudy with a slight (20%) chance of rain and snow showers Tuesday night,
- A mix of clouds and sun and a bit warmer with a slight (20%) chance of rain and snow showers Wednesday, just mostly cloudy at night,
- Then mostly sunny and a bit warmer Thursday, partly cloudy Thursday night,
- Then partly cloudy Friday.
- snow level 4,500 ft. Tuesday, 5,500 ft. Tuesday night, 6,500 ft. Wednesday, free air freezing level 11,000 ft. Wednesday night and Thursday, then 12,000 ft. Friday.
- highs 37-42 lows 27-29.