Sep
03.
Here is my weekly weather quiz question. What is the “Spring Tide?”
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An Upper Level High Pressure Ridge (“Arch” shape) will be following closely behind the Upper Level Low Pressure Trough (“U” shape) that’s moved away from us. The graphics for days 1-3 show no frontal activity through the period. The graphics for days 3-7 Friday through Tuesday show a cold front falling apart as t hits the coast Saturday, then a frontal system will be moving through the coast then inland next Monday and Tuesday.
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Air Quality Index:
Eugene/Springfield: The Air Quality Index is 38 in the Good category measuring Particulate Matter.
Oakridge: The Air Quality Index is 18 in the Good category measuring Particulate Matter.
Cottage Grove: The Air Quality Index is 19 in the Good category measuring Particulate Matter.
Data courtesy of Lane Regional Air Protection Agency (LRAPA.org)
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ADVISORIES:
- AN EXCESSIVE HEAT WARNING IS IN EFFECT FROM NOON THURSDAY UNTIL UNTIL 10 PM FRIDAY FOR THE LOWER COLUMBIA RIVER, TUALATIN VALLEY, PORTLAND WEST HILLS AND CHEHALEM MOUNTAIN, INNER PORTLAND METRO, EAST PORTLAND METRO, WEST CENTRAL WILLAMETTE VALLEY, EAST CENTRAL WILLAMETTE VALLEY, BENTON COUNTY LOWLANDS, LINN COUNTY LOWLANDS, LANE COUNTY LOWLANDS, WEST COLUMBIA RIVER GORGE OF OREGON ABOVE 500 FT., THE WEST COLUMBIA RIVER GORGE I-84 CORRIDOR, CLACKAMAS COUNTY CASCADE FOOTHILLS, THE CASCADE FOOTHILLS OF MARION AND LINN COUNTIES, AND THE LANE COUNTY CASCADE FOOTHILLS.
- A HEAT ADVISORY IS IN EFFECT FROM NOON THURSDAY UNTIL 10 PM FRIDAY FOR THE NORTH OREGON COAST RANGE LOWLANDS, THE CENTRAL OREGON COAST RANGE LOWLANDS, THE NORTH OREGON COAST RANGE, THE CENTRAL OREGON COAST RANGE, AND UPPER HOOD RIVER VALLEY.
- A HEAT ADVISORY IS IN EFFECT FROM NOON UNTIL 8 PM THURSDAY FOR THE SOIUTH CENTRAL OREGON COAST, CENTRAL DOUGLAS COUNTY, THE CENTRAL OREGON COAST, EASTERN CURRY COUNTY AND JOSEPHINE COUNTY, AND JACKSON COUNTY.
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 clear tonight,
- Sunny and warmer Wednesday, clear Wednesday night,
- Sunny and a bit warmer (Hot) Thursday, partly cloudy in the evening, mostly clear late at night,
- Sunny and a bit cooler Friday, then partly cloudy Friday night.
- lows 53-59 highs 95-100 cooling to 99 Friday.
- Mostly sunny and a bit cooler Saturday, mostly clear in the evening, partly cloudy late Saturday night,
- Mostly sunny and a bit cooler Sunday, partly cloudy at night,
- A mix of clouds and sun and a bit cooler Monday, mostly cloudy with a slight (20%) chance of showers Monday night,
- Then a mix of clouds and sun and a bit cooler with a good (50%) chance of showers Tuesday.
- highs 92-77 lows 57-54. (seasonal averages high 81 low 50)
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EUGENE-SPRINGFIELD POLLEN COUNT:
GRASS: LOW (2)
TREES: LOW (2)
WEEDS: LOW (2)
Last Measured 8.31.24
Data courtesy of Oregon Allergy Associates.
The local pollen season is over.
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Your Saturday College Football Weather Forecast:
Saturday August 31st:
Ducks vs Idaho Vandals at Autzen Stadium, Game time 4:30 pm- Ducks won 24-14.
Beavers vs Idaho State Bengals at Reser Stadium, Game time: 3:30 pm-Beavers won 38-15.
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Forecast for the Umpqua Valley including Roseburg:
- Clear tonight, hazy late,
- Sunny and hazy with patchy smoke and warmer Wednesday, clear with patchy evening smoke, areas of smoke late Wednesday night,
- Areas of AM smoke, sunny and a bit warmer (Hot) Thursday afternoon, clear Thursday night,
- Sunny and a bit cooler (still very warm) Friday with a slight (20%) chance of afternoon thunderstorms, partly cloudy with a slight (20%) chance of evening thunderstorms, just partly cloudy late Friday night.
- lows 58-56 highs 10o-104 cooling to 98 Friday.
- Some AM clouds, sunny and a bit cooler Saturday, becoming mostly clear in the evening, partly cloudy late Saturday night,
- Partly cloudy and a bit cooler Sunday, partly cloudy at night,
- Mostly cloudy start, partly cloudy and a bit cooler Monday afternoon, mostly cloudy with a slight (20%) chance of rain late Monday night,
- Mostly cloudy with a slight (20%) chance of AM rain, then mostly cloudy and a bit cooler with a (30%) chance of showers Tuesday afternoon.
- highs 92-78 lows 58-56. (seasonal averages high 84 low 55)
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Forecast for The South Oregon Coast Including Coos Bay and North Bend:
- Mostly clear tonight,
- Sunny and a bit warmer with coastal haze Wednesday while sunny and hazy with inland smoke Wednesday, clear Wednesday night with coastal haze while hazy with patchy smoke inland Wednesday night,
- Some AM clouds with AM coastal haze while patchy inland AM smoke, sunny and a bit warmer Thursday afternoon, clear at night,
- Partly cloudy with and a bit cooler Friday, partly cloudy with a slight (20%) chance of evening thunderstorms, then mostly cloudy late Friday night.
- lows 54-66 highs 75-77 cooling to 70 Friday.
- Mostly cloudy start, partly cloudy and a bit cooler Saturday afternoon, mostly cloudy Saturday night,
- Mostly cloudy and a bit cooler Sunday, mostly cloudy at night,
- Mostly cloudy and a bit cooler Monday, mostly cloudy with a slight (20%) chance of rain Monday night,
- Mostly cloudy with a slight (20%) chance of AM rain, then mostly cloudy and a bit cooler with a (30%) chance of showers Tuesday afternoon.
- highs 68-64 lows near 55. (seasonal average high 67 low 53)
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Forecast for the Northern Oregon Cascades including the Cascades in Lane County:
- Mostly clear tonight with areas of smoke tonight,
- Sunny and a bit cooler Wednesday, mostly clear Wednesday night,
- Sunny and a bit warmer Thursday, partly cloudy at night,
- Sunny and a bit cooler Friday, then partly cloudy with a slight (20%) chance of showers Friday night.
- free air freezing level 15,000 ft. rising to 16,000 ft. late tonight, 16,000 ft. Wednesday and Wednesday night, 15,000 ft. Thursday through Friday, then snow level above 5,000 ft. Friday night.
- lows 49-56 highs 82-85 cooling to 84 Friday .
- Mostly sunny and a bit cooler Saturday, partly cloudy with a slight (20%) chance of showers Saturday night,
- Sunny and a bit cooler Sunday, partly cloudy in the evening, mostly cloudy late at night,
- Mostly sunny and a bit cooler Monday, mostly cloudy with a slight (20%) chance of showers Monday night,
- Then a mix of clouds and sun and a bit cooler with a good (50%) chance of showers Tuesday.
- free air freezing level 14,000 ft. Saturday, snow level above 8,000 ft. Saturday night, free air freezing level 14,000 ft. Sunday, 15,000 ft. Sunday through Monday, then snow level above 8,000 ft. Monday night and Tuesday.
- highs 80-62 lows 52-46.