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 Saturday night. The graphics for days 3-7 Wednesday through Sunday show a weak cold front will be moving into the Pacific Northwest Wednesday. Then a complex frontal system will be offshore and moving in Friday and Friday night.
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 FIRE WEATHER ADVISORY IS IN EFFECT FROM THIS MORNING THROUGH THIS 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:
- Sunny and cooler today, mostly clear tonight,
- Then sunny and a bit warmer Monday and Tuesday, mostly clear both nights,
- highs 70-80 lows 42-49.
- Sunny and a bit cooler Wednesday, mostly clear Wednesday night,
- Sunny and a bit warmer Thursday, mostly clear at night,
- Mostly sunny and a bit cooler with a (30%) chance of rain Friday, mostly cloudy with a (30%) chance of rain Friday night,
- The mostly sunny and a bit warmer with a slight (20%) chance of rain Saturday.
- highs 72-73 cooling to 70 Friday warming to 72 Saturday lows 42-46. (seasonal averages high 73 low 45)
Your Saturday College Football Weather Forecast:
Saturday September 28:
Ducks vs Michigan State at the Rose Bowl Stadium, Pasadena, CA: Game time 8 pm- Final Score: Ducks won 34 to 13.
Friday October 4th:
Ducks vs Michigan State Spartans at Spartan Stadium, East Lansing, Michigan: Game time 6:00 pm-Weather Forecast: Partly cloudy 72 degrees and falling throughout the game.
Saturday October 5th:
Beavers vs Colorado State Rams at Reser Stadium: Game time 3:30 pm- Weather Forecast: Partly cloudy 68 degrees warming to 70 degrees then cooling throughout the rest of the game.
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Forecast for the Umpqua Valley including Roseburg:
- Some AM clouds, sunny and cooler this afternoon, mostly clear tonight,
- Sunny and a bit warmer Monday, mostly clear at night,
- Sunny and a bit warmer Tuesday, then clear Tuesday night.
- highs 73-84 lows 45-52.
- Mostly sunny and a bit cooler Wednesday, mostly clear Wednesday night,
- Sunny Thursday, mostly clear at night,
- Partly cloudy and a bit cooler with a slight (20%) chance of rain Friday, a slight (20%) chance of rain Friday night,
- Then partly cloudy with a slight (20%) chance of rain Saturday.
- highs 76-75 lows 46-52. (seasonal averages high 75 low 49)
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Forecast for The South Oregon Coast Including Coos Bay and North Bend:
- Sunny and a bit warmer today, mostly clear tonight,
- Sunny and warmer Monday, mostly clear at night,
- Sunny and a bit cooler Tuesday, then mostly clear Tuesday night.
- highs 66-72 cooling to 70 Tuesday lows 47-4.
- Sunny and a bit cooler Wednesday, mostly clear Wednesday night,
- Mostly sunny and a bit warmer Thursday, mostly clear at night,
- Partly cloudy with a slight (20%) chance of rain Friday, mostly cloudy with a slight (20%) chance of rain Friday night,
- Then partly cloudy with a slight (20%) chance of rain Saturday.
- highs 65-68 cooling to 65 Saturday 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 cooler today, clear tonight,
- Then sunny and a bit warmer Monday and Tuesday, mostly clear both nights.
- free air freezing level 13,000 ft. falling to 12,000 ft. this afternoon, 14,000 ft. rising to 15, 000 ft. tonight, 15,000 ft. Monday, then 16,000 ft. Monday night through Tuesday night.
- highs 59-75 lows 35-44.
- Sunny and a bit cooler Wednesday, mostly clear Wednesday night,
- Sunny Thursday, mostly clear Thursday night,
- Mostly sunny and a bit cooler with a slight (20%) chance of rain Friday and Saturday, mostly cloudy with a (30%) chance of rain both nights.
- free air freezing 16,000 ft. Tuesday and Tuesday night, 14,000 ft. Wednesday and Wednesday night, 13,000 ft. Thursday, 14,000 ft. Thursday night, then snow level above 8,000 ft. Friday through Saturday.
- highs 66-59 lows 38-42.