Here is my weekly weather quiz question for the last time. What is “Steam Fog?” Here is the correct answer. Steam Fog is fog formed when water vapor is added to air which is much colder than the source of the vapor. It may be formed when very cold air drifts across relatively warm water. At temperatures below about-20°F, ice particles or droxtals may be formed in the air producing a type of ice fog known as frost smoke.
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An Upper Level High Pressure Ridge (“Arch” shape) rebuilds bringing sunshine and warmth. The graphics for days 1-3 show a weak cold front sliding through today. The graphics for days 3-7 Tuesday through Saturday show a weak cold front will be moving into the Pacific Northwest between Tuesday and Wednesday. Then a complex frontal system will be offshore and moving in Friday and next Saturday.
Note: Lane County residents will have to wait until Tuesday, October 15, 2024, at the earliest for the opening of the fall outdoor burning season. The season is typically scheduled to start on October 1 each year. However, the decision to delay has been jointly made by the Lane County Fire Defense Board and the Oregon Department of Forestry (ODF).
ADVISORIES:
- A DENSE FOG ADVISORY IS IN EFFECT UNTIL NOON TODAY FOR THE TILLIMOOK COUNTY COAST AND THE CENTRAL OREGON COAST.
- A FIRE WEATHER ADVISORY IS IN EFFECT FROM SUNDAY MORNING THROUGH SUNDAY EVENING FOR WIND AND LOW RELATIVE HUMIDITY FOR THE LOWER COLUMBIA BASIN OF OREGON.
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:
- Patchy AM fog, mostly sunny and a bit warmer today, partly cloudy this evening, mostly clear late tonight,
- Sunny and a bit cooler Sunday, mostly clear at night,
- Sunny and a bit warmer Monday, then mostly clear Monday night.
- highs 77-70 warming to 74 Monday lows 44-42.
- Sunny and a bit warmer Tuesday, mostly clear Tuesday night,
- Sunny and a bit cooler Wednesday, mostly clear at night,
- Sunny and a bit warmer Thursday, partly cloudy Thursday night,
- Then mostly sunny with a slight (20%) chance of showers Friday.
- highs 79-74 warming to 72 Friday lows 47-43 warming to 45 Friday night . (seasonal averages high 74 low 45)
Your Saturday College Football Weather Forecast:
Today Saturday September 28:
Ducks vs UCLA Bruins at the Rose Bowl Stadium, Pasadena, CA: Game time 8 pm- Weather forecast: Partly Cloudy 70 degrees and cooling throughout the game.
Beavers have a Bye week.
Next Game:
Saturday October 5th:
Beavers vs Colorado State Rams at Reser Stadium: Game time 3:30 pm- Way too soon for a Preliminary weather forecast.
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Forecast for the Umpqua Valley including Roseburg:
- Sunny and a bit cooler today, mostly clear tonight,
- Some AM clouds, sunny and a bit cooler Sunday afternoon, mostly clear at night,
- Sunny and a bit warmer Monday, then mostly clear Monday night.
- highs 80-74 warming to 77 Monday lows 49-45 warming to 48 Monday night.
- Sunny and a bit warmer Tuesday, mostly clear Tuesday night,
- Mostly sunny and a bit cooler Wednesday, mostly clear at night,
- Mostly sunny and a bit cooler Thursday, mostly clear in the evening, partly cloudy late Thursday night,
- Then partly cloudy and a bit warmer with a slight (20%) chance of rain Friday.
- highs 83-77 warming to 79 Friday lows 50-47 warming to 49 Thursday night. (seasonal averages high 76 low 49)
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Forecast for The South Oregon Coast Including Coos Bay and North Bend:
- Partly cloudy and a bit cooler today, mostly clear tonight,
- Some AM clouds, sunny and a bit warmer Sunday afternoon, mostly clear at night,
- Mostly sunny and warmer Monday, then mostly clear Monday night.
- highs 69-63 lows 47-50.
- Mostly sunny and a bit cooler Tuesday, mostly clear Tuesday night,
- Mostly sunny and a bit cooler Wednesday, mostly clear at night,
- Mostly sunny and a bit warmer Thursday, partly cloudy Thursday night,
- Then partly cloudy with a slight (20%) chance of rain Friday.
- highs 70-65 warming to 67 Thursday cooling to 65 Friday lows 49-52. (seasonal average high 66 low 50)
Forecast for the Northern Oregon Cascades including the Cascades in Lane County:
- Sunny and a bit warmer today, mostly cloudy this evening, partly cloudy late tonight,
- Mostly sunny and a bit cooler Sunday, mostly clear at night,
- Sunny and a bit cooler Monday, then mostly clear Monday night.
- free air freezing level 15,000 ft. today, 14,000 ft. Saturday night, 13,000 ft. Sunday and Sunday night, 15,000 ft. Monday, then 16,000 ft. Monday night.
- highs 74-59 lows 40-34 warming back to 40 Monday night.
- Sunny and a bit warmer Tuesday, mostly clear Tuesday night,
- Sunny and a bit cooler Wednesday, partly cloudy at night,
- Sunny and a bit warmer Thursday, partly cloudy Thursday night,
- Then mostly sunny with a slight (20%) chance of showers Friday.
- free air freezing 16,000 ft. Tuesday and Tuesday night, 15,000 ft. Wednesday 14,000 ft. Wednesday night through Thursday night then snow level above 8,000 ft. Saturday.
- highs 73-63 lows 42-40 warming back to 42 Thursday night.