Jul
30.
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 Wednesday through Sunday 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 32 in the Good category measuring Ozone.
Oakridge: The Air Quality Index is 155 in the Unhealthy category measuring Particulate Matter.
Cottage Grove: The Air Quality Index is 22 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 TUESDAY FOR EASTERN PORTIONS OF LANE COUNTY. THIS DOES NOW INCLUDE THE EUGENE-SPRINGFIELD AREA.
- AN AIR QUALITY ADVISORY IS IN EFFECT UNTIL NOON TUESDAY FOR THE CASCADE FOOTHILLS IN LANE COUNTY AND THE CASCADES IN LANE COUNTY.
- AN AIR QUALITY ADVISORY IS IN EFFECT UNTIL 11 AM TUESDAY FOR DESCHUTES COUNTY.
- A RED FLAG WARNING IS IN EFFECT UNTIL 8 PM TONIGHT FOR WIND AND LOW RELATIVE HUMIDITY FOR THE SOUTHERN BLUE AND STRAWBERRY MOUNTAINS.
- A RED FLAG WARNING IS IN EFFECT UNTIL 8 PM TONIGHT FOR WIND AND LOW RELATIVE HUMIDITY FOR THE LOWER COLUMBIA BASIN OF OREGON.
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:
- Clear tonight,
- Sunny and a bit warmer Monday, clear Monday night,
- Sunny and a bit warmer Tuesday, clear at night,
- Mostly sunny and a bit warmer Wednesday, then mostly clear Wednesday night.
- lows 50-53 highs 87-90.
- Mostly sunny and a bit cooler Thursday, partly cloudy Thursday night,
- Mostly sunny and a bit warmer Friday, mostly clear at night,
- Mostly sunny and a bit warmer Saturday, clear Saturday night,
- Then sunny and a bit warmer Sunday.
- highs 89-94 lows 53-56. (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:
- Clear with evening haze, clear with patchy fog late tonight,
- Sunny and a bit warmer Monday, clear with evening haze, patchy fog late Monday night,
- Sunny and a bit warmer Tuesday, mostly clear at night,
- Mostly sunny and a bit warmer Wednesday, then mostly clear Wednesday night.
- lows 55-58 highs 87-92.
- Mostly sunny and a bit cooler Thursday, mostly clear Thursday night,
- Mostly sunny and a bit warmer Friday, mostly clear at night,
- Then sunny and a bit warmer Saturday and Sunday, mostly clear Saturday night.
- highs 89-95 lows 57-62 (seasonal averages high 88 low 59)
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Forecast for The South Oregon Coast Including Coos Bay and North Bend:
- Mostly clear this evening and mostly cloudy with patchy coastal fog late tonight while mostly clear with inland evening haze and patchy late evening and nighttime patchy fog,
- AM clouds and patchy fog, sunny and a bit warmer Monday afternoon, partly cloudy in the evening, mostly cloudy late Monday night with patchy inland fog late,
- AM clouds, sunny Tuesday afternoon, mostly clear in the evening, mostly cloudy late at night,
- Partly cloudy Wednesday, then partly cloudy late Wednesday night.
- lows near 55 highs near 75.
- Partly cloudy Thursday and Thursday night,
- Some AM clouds, sunny Friday afternoon, mostly clear in the evening, partly cloudy late Friday night,
- Then sunny and a bit warmer Saturday and Sunday, partly cloudy Saturday night.
- highs 74-77 lows 56-58. (seasonal averages high 67 low 54)
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Forecast for the Northern Oregon Cascades including the Cascades in Lane County:
- Clear and hazy with areas of smoke tonight,
- Sunny and hazy and a bit warmer with areas of smoke Monday, clear and hazy with areas of smoke Monday night,
- Sunny and hazy with areas of smoke and a bit warmer Tuesday, mostly clear and hazy with areas of smoke at night,
- Mostly sunny and hazy with areas of smoke Wednesday, then partly cloudy and hazy with areas of smoke Wednesday night.
- free air freezing level 13,000 ft. rising to 14,000 ft. late tonight, 13,000 ft. rising to 14,000 ft. Monday afternoon, 14,000 ft. rising to 15,000 ft. Monday night, 15,000 ft. Tuesday through Wednesday, then 14,000 ft. Wednesday night.
- lows 44-50 highs 74-79.
- Partly cloudy and hazy with areas of smoke and and a bit cooler Thursday, partly cloudy and hazy with areas of smoke Thursday night,
- AM sun and haze with areas of smoke, partly cloudy and hazy with areas of smoke Friday afternoon, partly cloudy and hazy with areas of smoke at night,
- Mostly sunny and hazy with areas of patchy smoke a bit warmer Saturday with a slight (20%) chance of showers and thunderstorms in the afternoon, mostly clear and hazy with areas of smoke Saturday night,
- Sunny and hazy and a bit warmer with areas of smoke Sunday.
- free air freezing level 14,000 ft. Thursday through through Saturday night, then 15,000 ft. Sunday.
- highs 77-83 lows 49-52.
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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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