Here is my weekly weather quiz question for the lasttime. What is “Zero Datum?” Here is the correct answer. Zero Datum: In hydrologic terms, a reference “zero” elevation for a stream or river gage. This “zero” can be referenced (usually within ten feet of the bottom of the channel) to mean sea level, or to any other recognized datum.
The Jet Stream is still pushing fronts our way and sending plenty of moisture to the Pacific Northwest. The graphics for days 1-3 show a complex frontal system that’s moving in and the next one in line behind it. The graphics for days 3-7 Tuesday through Saturday show the frontal activity through the period.
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ADVISORIES:
- A WINTER WEATHER ADVISORY IS IN EFFECT FROM 10 AM TODAY UNTIL 10 AM SUNDAY ABOVE 4,000 FT. FOR THE NORTH OREGON CASCADES, THE CASCADES OF MARION AND LINN COUNTIES, AND THE CASCADES OF LANE COUNTY.
- A WINTER WEATHER ADVISORY IS IN EFFECT UNTIL 10 AM TODAY ABOVE 3,500 FT. FOR THE SOUTH CENTRAL OREGON CASCADES, THE SISKIYOU MOUNTAINS, AND THE SOUTHERN OREGON CASCADES.
- A WINTER WEATHER ADVISORY IS IN EFFECT UNTIL 10 AM SUNDAY ABOVE 4,000 FT. FOR THE EAST SLOPES OF THE OREGON CASCADES.
- A FLOOD WARNING IS IN EFFECT UNTIL FURTHER NOTICE FOR THE JOHN DAY RIVER AT SERVICE CREEK AFFECTING WHEELER COUNTY
- A FLOOD WARNING IS IN EFFECT UNTIL LATE MONDAY EVENING FOR THE COQUILLE RIVER AT COQUILLE AFFECTING COOS 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.
Forecast for the Southern and lower Mid Willamette Valley including Eugene-Springfield and Albany-Corvallis:
- Mostly cloudy and a bit cooler with rain today (0.25 in. of rain possible), showers tonight (0.25 in. of rain possible),
- Cloudy with a good (50%) chance of AM rain, rain and a bit warmer Sunday afternoon, rain at night,
- Mostly cloudy with a (40%) chance of showers and a bit cooler Monday, then partly cloudy Monday night.
- highs 50-53 cooling to 52 Monday lows 45-36.
- A mix of clouds and sun and a bit cooler Tuesday, mostly cloudy Tuesday night,
- Mostly cloudy start, a mix of clouds and sun a bit warmer Wednesday afternoon, partly cloudy at night,
- Mostly sunny Thursday, partly cloudy in the evening, mostly cloudy late Thursday night,
- AM clouds and sun with a slight (20%) chance of AM rain, then mostly cloudy with a slight (20%) chance of rain Friday afternoon.
- highs 48-50 lows 35-37 (seasonal averages high 47 low 34)
Your College Football Weather Forecast:
Today Wednesday January 1, 2025:
The Ducks vs. Ohio State Buckeyes in the Rose Bowl, Pasadena, California: The Ducks were beaten down by the Buckeyes 41-21.
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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 and a bit cooler with rain today (0.10 in of rain possible) and this evening, a good (50%) chance of rain late tonight (0.10 in of rain possible),
- Mostly cloudy with a good (50%) chance of AM rain, rain likely (70%) and a bit warmer Sunday afternoon and evening, rain late at night,
- Mostly cloudy with a (30%) chance of showers and a bit cooler Monday, partly cloudy with areas of fog late Monday night.
- highs 54-52 warming back to 54 Sunday lows 45-47 cooling to 36 Monday night.
- Partly cloudy with areas of fog and a bit cooler Tuesday, mostly cloudy with areas of fog Tuesday night,
- Mostly cloudy with areas of fog and a bit warmer Wednesday, mostly clear with areas of fog at night,
- Mostly sunny with areas of fog and a bit warmer Thursday, mostly clear in the evening, partly cloudy with areas of fog Thursday night,
- Partly cloudy with areas of AM fog and a slight (20%) chance of rain, then mostly cloudy with a slight (20%) chance of rain Friday afternoon.
- highs 53-50 warming to 54 Wednesday lows 42-37 warming to 39 Tuesday night. (seasonal averages high 49 low 37)
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Forecast for The South Oregon Coast Including Coos Bay and North Bend:
- Mostly cloudy and a bit cooler with rain today (0.25 in. of rain possible) and this evening, coastal rain likely (70%) late tonight while a (0%) chance of inland rain late tonight (0.25 in. of rain possible) ,
- Mostly cloudy with AM coastal rain likely (70%) and a bit warmer coastal rain Sunday afternoon while a good (50%) chance of inland AM rain and inland rain likely (70%) and a bit warmer Sunday afternoon, rain at night,
- Mostly cloudy with a (30%) chance of showers and a bit warmer Monday, then partly cloudy with areas of fog late Monday night.
- highs 55-57 lows 45-47 .
- Partly cloudy with areas of fog and a bit warmer Tuesday, mostly cloudy with areas of fog Tuesday night,
- Mostly cloudy with areas of AM fog, partly cloudy Wednesday afternoon, mostly clear with areas of fog at night,
- Mostly sunny with areas of AM fog, mostly sunny and a bit warmer Thursday afternoon, mostly clear in the evening, partly cloudy with areas of fog late Thursday night,
- Partly cloudy with areas of AM fog and a slight (20%) chance of rain, then mostly cloudy with a slight (20%) chance of rain Friday afternoon.
- highs 57-59 lows 43-40 warming to 42 Tuesday night (seasonal averages high 53 low 41)
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Forecast for the Northern Oregon Cascades including the Cascades in Lane County:
- Mostly cloudy with AM freezing rain, and rain with snow likely (70%), a bit cooler with rain and snow this afternoon (0.50 in. of rain possible, 3-6 in. of snow possible, a trace of ice accumulation possible, snow possibly heavy at times), a slight (20%) chance of evening freezing rain, rain and snow, rain and snow showers late tonight,
- Mostly cloudy with AM rain and freezing rain likely (70%), a bit warmer with rain Sunday afternoon, rain at night,
- Mostly cloudy with a good (50%) chance of AM rain and snow showers, a good (50%) chance of AM rain and snow showers Monday, partly cloudy in the evening, then becoming clear late Monday night.
- snow level 4,500 ft. today and tonight, 6,000 ft. Sunday, then 5,500 ft. Sunday night through Monday night.
- highs 33-36 low 32-26.
- Mostly sunny Tuesday, mostly cloudy Tuesday night,
- A mix of clouds and sun, and a bit warmer Wednesday, mostly clear at night,
- Sunny Thursday, partly cloudy Thursday night,
- Then a mix of clouds and sun with a slight
(20%) chance of rain and a bit warmer Friday. - free air freezing 7,500 ft. Tuesday, level 8,000 ft. Tuesday, 8,000 ft. Tuesday night, 10,000 ft. Wednesday and Wednesday night, 12,000 ft. Thursday and Thursday night, then snow level above 8.000 ft. Friday.
- highs 36-43 lows 24-30.