Jul
29.
Here is my weekly weather quiz question for the last time. What is a “Monsoon? ” Here is the correct answer. A Monsoon is a thermally driven wind arising from differential heating between a land mass and the adjacent ocean that reverses its direction seasonally.
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An Upper Level Low Pressure Trough (“U” shape) keeps our weather pattern stable with normal temperatures. The graphics for days 1-3 show a cold front pushing through the Pacific Northwest Monday. The graphics for days 3-7 Tuesday through Saturday show no frontal activity pushing into or through Oregon during the period until a front shows up to our northwest Wednesday through next Friday. So far the smoke has been staying in Eastern Lane County, but if the winds shift that might not be the case.
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Air Quality Index:
Eugene/Springfield: The Air Quality Index is 30 in the Good category measuring Ozone.
Oakridge: The Air Quality Index is 35 in the Good category measuring Particulate Matter.
Cottage Grove: The Air Quality Index is 25 in the Good category measuring Ozone.
Data courtesy of Lane Regional Air Protection Agency (LRAPA)
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ADVISORIES:
- AN AIR QUALITY ADVISORY IS IN EFFECT UNTIL NOON NEXT TUESDAY FOR EASTERN PORTIONS OF LANE COUNTY. THIS DOES NOT INCLUDE THE EUGENE-SPRINGFIELD AREA.
- AN AIR QUALITY ADVISORY IS IN EFFECT UNTIL NOON NEXT TUESDAY FOR THE CASCADE FOOTHILLS IN LANE COUNTY AND THE CASCADES IN LANE COUNTY.
- AN AIR QUALITY ADVISORY IS IN EFFECT UNTIL 11 AM NEXT TUESDAY FOR DESCHUTES COUNTY.
- A RED FLAG WARNING IS IN EFFECT UNTIL 8 PM THIS EVENING FOR THE KLAMATH BASIN, AND THE FREMONT-WINEMA NATIONAL FOREST.
- A RED FLAG WARNING IS IN EFFECT UNTIL 8 PM TODAY FOR STRONG GUSTY WIND AND LOW RELATIVE HUMIDITY FOR THE SOUTH CENTRAL OREGON DESERT INCLUDING THE BLM LAND IN EASTERN LAKE COUNTY AND WESTERN HARNEY COUNTY.
- A FIRE WEATHER WATCH IS IN EFFECT FROM SUNDAY AFTERNOON THROUGH SUNDAY EVENING FOR STRONG GUSTY WIND AND LOW RELATIVE HUMIDITY FOR THE SOUTH CENTRAL OREGON DESERT INCLUDING THE BLM LAND IN EASTERN LAKE COUNTY AND WESTERN HARNEY COUNTY.
- A RED FLAG WARNING IS IN EFFECT UNTIL 8 PM SUNDAY FOR WIND AND LOW RELATIVE HUMIDITY FOR THE LOWER COLUMBIA BASIN OF OREGON
- A RED FLAG WARNING IS IN EFFECT THROUGH THIS EVENING FOR STRONG GUSTY WIND AND LOW RELATIVE HUMIDITY FOR THE KLAMATH BASIN, AND THE FREMONT-WINEMA NATIONAL FOREST.
- A FIRE WEATHER WATCH IS IN EFFECT FROM SUNDAY AFTERNOON THROUGH SUNDAY EVENING FOR STRONG GUSTY WIND AND LOW RELATIVE HUMIDITY FOR THE KLAMATH BASIN, AND THE FREMONT-WINEMA NATIONAL FOREST.
- A RED FLAG WARNING IS IN EFFECT THROUGH 9 PM TONIGHT FOR GUSTY WIND AND LOW RELATIVE HUMIDITY FOR THE BURNS BLM AND THE VALE BLM.
HEALTH ADVISORIES:
- A RECREATIONAL USE HEALTH ADVISORY IS IN EFFECT FOR THE WILLAMETTE RIVER NEAR WILLAMETTE COVE IN MULTNOMAH COUNTY DUE TO THE PRESENCE OF A CYANOBACTERIA BLOOM. PEOPLE SHOULD AVOID SWIMMING AND HIGH SPEED WATER ACTIVITIES, SUCH AS WATER SKIING OR POWER BOATING, IN AREAS OF THE LAKE AND SLOUGH WHERE BLOOMS ARE, AS THE MAJOR ROUTE OF EXPOSURE IS INGESTION OF WATER. TOXINS ARE NOT ABSORBED THROUGH THE SKIN, HOWEVER, THOSE WITH SKIN SENSITIVITIES MAY GET A PUFFY RED RASH. THE OREGON HEALTH AUTHORITY ENCOURAGES PEOPLE TO VISIT THE AREA AND ENJOY ACTIVITIES SUCH AS FISHING, CAMPING, HIKING, BILKING, PICNICKING, BIRD WATCHING, CANOEING, AND KAYAKING. BOATING IS SAFE AS LONG AS SPEEDS DO NOT CREATE EXCESSIVE WATER SPRAY. SPRAYS COULD LEAD TO THE RISK OF INHALING CYANOTOXINS.DO NOT DRINK THE WATER.
- A RECREATIONAL USE HEALTH ADVISORY IS IN EFFECT FOR ARRONS LAKE, PETE’S SLOUGH, AND STURGEON LAKE ON SAUVIE ISLAND DUE TO THE PRESENCE OF A CYANOBACTERIA BLOOM. PEOPLE SHOULD AVOID SWIMMING AND HIGH SPEED WATER ACTIVITIES, SUCH AS WATER SKIING OR POWER BOATING, IN AREAS OF THE LAKE AND SLOUGH WHERE BLOOMS ARE, AS THE MAJOR ROUTE OF EXPOSURE IS INGESTION OF WATER. TOXINS ARE NOT ABSORBED THROUGH THE SKIN, HOWEVER, THOSE WITH SKIN SENSITIVITIES MAY GET A PUFFY RED RASH. THE OREGON HEALTH AUTHORITY ENCOURAGES PEOPLE TO VISIT THE AREA AND ENJOY ACTIVITIES SUCH AS FISHING, CAMPING, HIKING, BILKING, PICNICKING, BIRD WATCHING, CANOEING, AND KAYAKING. BOATING IS SAFE AS LONG AS SPEEDS DO NOT CREATE EXCESSIVE WATER SPRAY. SPRAYS COULD LEAD TO THE RISK OF INHALING CYANOTOXINS.
- A RECREATIONAL USE HEALTH ADVISORY IS IN EFFECT FOR AGENCY LAKE AND EXTENDED THE ADVISORY FOR THE SOUTHERN PORTION OF UPPER KLAMATH LAKE, FROM HOWARD’S BAY SOUTH TO THE LINK RIVER DAM IN KLAMATH COUNTY DUE TO THE PRESENCE OF A CYANOBACTERIA BLOOM. PEOPLE SHOULD AVOID SWIMMING AND HIGH SPEED WATER ACTIVITIES, SUCH AS WATER SKIING OR POWER BOATING, IN AREAS OF THE RESERVOIR WHERE BLOOMS ARE, AS THE MAJOR ROUTE OF EXPOSURE IS INGESTION OF WATER. TOXINS ARE NOT ABSORBED THROUGH THE SKIN, HOWEVER, THOSE WITH SKIN SENSITIVITIES MAY GET A PUFFY RED RASH. THE OREGON HEALTH AUTHORITY ENCOURAGES PEOPLE TO VISIT AND ENJOY ACTIVITIES SUCH AS FISHING, CAMPING, HIKING, BILKING, PICNICKING, BIRD WATCHING, CANOEING, AND KAYAKING. BOATING IS SAFE AS LONG AS SPEEDS DO NOT CREATE EXCESSIVE WATER SPRAY.. SPRAYS COULD LEAD TO THE RISK OF INHALING CYANOTOXINS.
- 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,
- Mostly sunny Sunday, clear Sunday night,
- Sunny and a bit warmer Monday, clear at night,
- Sunny and a bit warmer Tuesday, then mostly clear Tuesday night.
- lows near 52 highs 85-90.
- Mostly sunny and a bit cooler Wednesday, partly cloudy Wednesday night,
- Mostly sunny Thursday ad Friday, mostly clear both nights,
- Then mostly sunny and a bit warmer Saturday.
- highs 89-92 lows near 54. (seasonal averages high 86 low 53)
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Eugene-Springfield Pollen Count:
Grass Pollen: Low (2)
Weeds: Low (5)
Tree Pollen: Low (3)
Last counted: 7.25.23
Data courtesy of Oregon Allergy Associates.
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Forecast for the Umpqua Valley including Roseburg:
- Mostly clear tonight with late night haze,
- Sunny and a bit warmer Sunday, clear with evening haze, clear Sunday night,
- Sunny and a bit warmer Monday, clear at night,
- Sunny and a bit warmer Tuesday, then mostly clear Tuesday night.
- lows 55-57 highs 85-92.
- Mostly sunny and a bit cooler Wednesday, partly cloudy Wednesday night,
- Mostly sunny Thursday, mostly clear at night,
- Then mostly sunny and a bit warmer Friday and Saturday, mostly clear Friday night.
- highs 89-92 lows near 58 (seasonal averages high 88 low 59)
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Forecast for The South Oregon Coast Including Coos Bay and North Bend:
- Mostly clear with evening inland haze, partly cloudy late tonight,
- AM clouds, sunny and a bit warmer Sunday afternoon, mostly clear in the evening, mostly cloudy late Sunday night,
- AM clouds, sunny and a bit warmer Monday afternoon, mostly clear in the evening, mostly cloudy late at night,
- Partly cloudy and a bit warmer Tuesday, then partly cloudy Tuesday night.
- lows near 55 highs 74-76.
- Partly cloudy and a bit cooler Wednesday and in the evening, mostly cloudy late Wednesday night,
- Partly cloudy Thursday and Thursday night,
- Some AM clouds, sunny and a bit warmer Friday afternoon, mostly clear in the evening, partly cloudy late Friday night,
- Then sunny and a bit warmer Saturday.
- highs 74-77 lows near 56. (seasonal averages high 67 low 54)
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Forecast for the Northern Oregon Cascades including the Cascades in Lane County:
- Hazy with areas of evening smoke, mostly clear and hazy late tonight,
- Mostly sunny and hazy and a bit cooler Sunday with areas of afternoon and evening smoke, clear late Sunday night,
- Sunny and a bit warmer Monday, clear at night,
- Sunny and a bit warmer Tuesday, then partly cloudy Tuesday night.
- free air freezing level 14,000 ft. falling to 13,000 ft. late tonight, 13,000 ft. Sunday, 13,000 ft. rising to 14,000 ft. late Sunday night, 14,000 ft. Monday, then 15,000 ft. Monday night through Tuesday night.
- lows 43-49 highs 72-80.
- Some AM clouds, sunny and a bit cooler Wednesday afternoon, partly cloudy Wednesday night,
- Mostly sunny and a bit cooler Thursday, partly cloudy with a slight (20%) chance of evening showers and thunderstorms, a slight (20%) chance of showers late at night,
- Mostly sunny and a bit cooler with a slight (20%) chance of showers and thunderstorms Friday afternoon, mostly clear Friday night,
- Then mostly sunny and a bit warmer Saturday.
- free air freezing level 15,000 ft. Wednesday, 14,000 ft. Wednesday night and Thursday, snow level above 8,000 ft. Thursday night and Friday, then free air freezing level 14,000 ft. Friday night and Saturday.
- highs 79-76 warming back to 79 Saturday lows 50-48.
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For all of your Eugene-Springfield and Lane County News, Weather, and Sports go to: EugeneDailyNews.com
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