Aug
11.
Here is my weekly weather quiz question for the last time. “What is “Smog?” Here is the correct answer. Smog: Originally smog meant a mixture of smoke and fog. Now, it means air that has restricted visibility due to pollution or pollution formed in the presence of sunlight–photochemical smog.
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The Jet Stream gives us Zonal airflow (West to East) continuing the slow cooling trend over the Pacific Northwest. The graphics for days 1-3 show a complex frontal system to our northwest Tuesday. The graphics for days 3-7 Wednesday through Sunday show a frontal system pushing through the Pacific Northwest between Wednesday and Thursday and another one following right behind it.
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Air Quality Index:
Eugene/Springfield: The Air Quality Index is 27 in the Good category measuring Ozone.
Oakridge: The Air Quality Index is 43 in the Good category measuring Particulate Matter.
Cottage Grove: The Air Quality Index is 35 in the Good category measuring Particulate Matter.
Data courtesy of Lane Regional Air Protection Agency (LRAPA.org)
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ADVISORIES:
- AN AIR QUALITY ADVISORY IS IN EFFECT UNTIL 1 PM MONDAY DUE TO WILDFIRE SMOKE FOR THE LANE COUNTY CASCADE FOOTHILLS AND THE CASCADES OF LANE COUNTY.
- AN AIR QUALITY ALERT IS IN EFFECT UNTIL 3 PM MONDAY DUE TO WILDFIRE SMOKE FOR DOUGLAS, KLAMATH, AND LAKE COUNTIES.
- AN AIR QUALITY ADVISORY IS IN EFFECT UNTIL MONDAY AFTERNOON DUE TO WILDFIRE SMOKE FOR DESCHUTES AND GRANT COUNTIES.
- AN AIR QUALITY ALERT IS IN EFFECT UNTIL 8 PM MONDAY DUE TO WILDFIRE SMOKE FOR JACKSON COUNTY.
- A FIRE WEATHER WATCH IS IN EFFECT FROM LATE MONDAY NIGHT THROUGH TUESDAY AFTERNOON FOR LIGHTNING FOR THE BAKER VALLEY.
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 this evening, mostly cloudy late tonight,
- AM clouds, mostly sunny and a bit cooler Monday, partly cloudy Monday night,
- AM clouds and sun, sunny and a bit warmer Tuesday afternoon, mostly clear with patchy fog at night,
- Sunny and a bit warmer Wednesday, then mostly clear Wednesday night.
- lows 54-52 warming back to 54 Wednesday night highs 79-84.
- A mix of clouds and sun and a bit cooler Thursday, partly cloudy Thursday night,
- A mix of clouds and sun with a slight (20%) chance of showers Friday, mostly cloudy with a slight (20%) chance of evening showers, party cloudy with a slight (20%) chance of showers late at night,
- A mix of clouds and sun with a slight (20%) chance of showers Saturday, partly cloudy Saturday night,
- Then mostly sunny Sunday.
- highs 82-76 warming to 80 Sunday lows near 52. (seasonal averages high 85 low 52)
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EUGENE-SPRINGFIELD POLLEN COUNT:
GRASS: LOW (3)
TREES: ABSENT (0)
WEEDS: LOW (6)
Last Measured 8.6.24
Data courtesy of Oregon Allergy Associates.
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Forecast for the Umpqua Valley including Roseburg:
- Mostly clear and hazy this evening, mostly cloudy and hazy late tonight,
- Mostly cloudy with AM haze and smoke, partly cloudy and hazy and a bit cooler Monday afternoon, partly cloudy and hazy with patchy fog Monday night,
- Some AM clouds, sunny and a bit warmer Tuesday afternoon, mostly clear with patchy fog at night,
- Patchy AM and late night fog, mostly sunny and a bit warmer Wednesday, then mostly clear Wednesday night.
- lows 58-54 warming to 56 Tuesday night highs 86-79 warming to 82 Tuesday.
- Patchy AM and late night fog, partly cloudy and a bit cooler Thursday and Thursday night,
- Patchy AM and late night fog, mostly cloudy and a bit cooler Friday, partly cloudy with a slight (20%) chance of showers at night,
- Patchy AM and late night fog, partly cloudy and a bit warmer with a slight (20%) chance of showers Saturday, partly cloudy Saturday night,
- Then partly cloudy and a bit warmer with patchy fog Sunday.
- highs 86-82 lows 58-56. (seasonal averages high 87 low 58)
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Forecast for The South Oregon Coast Including Coos Bay and North Bend:
- Partly cloudy this evening, mostly cloudy with patchy fog and a slight (20%) chance of late evening drizzle continuing through the night tonight,
- Mostly cloudy with patchy AM fog and a slight (20%) chance of inland drizzle, just mostly cloudy and a bit cooler Monday afternoon, mostly cloudy with patchy fog late Monday night,
- Patchy AM fog, partly cloudy and a bit warmer Tuesday afternoon, mostly clear with patchy evening fog, partly cloudy with patchy fog late at night,
- Some AM clouds with patchy fog, sunny and a bit cooler Wednesday afternoon, mostly cloudy with patchy fog late Wednesday night.
- lows 54-52 warming to 57 Wednesday night highs 66-72.
- Patchy AM fog, mostly cloudy and a bit cooler Thursday afternoon, partly cloudy in the evening, mostly cloudy with patchy fog and a slight (20%) chance of showers late Thursday night,
- Patchy AM and late night fog, mostly cloudy and a bit cooler with a slight (20%) chance of showers Friday and Friday night,
- Patchy AM and late night fog, mostly cloudy with a slight (20%) chance of AM showers, partly cloudy and a bit cooler Saturday afternoon, partly cloudy Saturday night,
- Patchy AM fog, then partly cloudy and a bit warmer with a slight (20%) chance of showers Sunday afternoon.
- highs 68-66 warming to 67 Saturday night lows 55-53 warming back to 55 Saturday night. (seasonal average high 67 low 52)
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Forecast for the Northern Oregon Cascades including the Cascades in Lane County:
- Mostly clear and hazy this evening, partly cloudy and hazy late tonight,
- Mostly sunny and hazy with areas of smoke and a bit cooler Monday, evening haze, mostly cloudy late Monday night,
- Sunny and a bit cooler Tuesday, mostly clear at night,
- Sunny and a bit warmer Wednesday, then partly cloudy Wednesday night.
- free air freezing level 14,000 ft. tonight, 14,000 ft. falling to 13,000 ft. Monday afternoon, 13,000 ft. Monday night, 13,000 ft. falling to 12,000 ft. Tuesday afternoon, 13,000 ft. Tuesday night, 14,000 ft. Wednesday, then 13,000 ft. Wednesday night.
- lows 45-40 warming back to highs 67-64 warming to 70 Wednesday .
- Mostly sunny and a bit cooler with a slight (20%) chance of showers Thursday, partly cloudy in the evening, mostly cloudy late Thursday night,
- A mix of clouds and sun and a bit cooler with a slight (20%) chance of showers Friday, mostly cloudy with a slight (20%) chance of showers at night,
- Mostly cloudy and a bit warmer with a slight (20%) chance of showers Saturday, partly cloudy in the evening, mostly cloudy late Saturday night,
- Then mostly sunny and a bit warmer with a slight (20%) chance of showers Sunday.
- snow level above 8,000 ft. Thursday, free air freezing level 12,000 ft. Thursday night, snow level above 8,000 ft. Friday through Saturday, free air freezing level 11,000 ft. Saturday night, then snow level above 8,000 ft. Sunday.
- highs 66-60 warming to 65 Sunday lows 44-42.
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