Aug
04.
Here is my weekly weather quiz question for the last time. What is a “Mountainado? ” Here is the correct answer. A Mountainado is a vertical-axis eddy produced in a downslope windstorm by the vertical stretching of horizontal roll vortices produced near the ground by vertical wind shear. Mountainadoes, when carried by the mean wind, can produce strong horizontal shears and wind gusts that are much more damaging than the general prevailing wind speeds.
________________
An Upper Level Low Pressure Trough (“U” shape) offshore keeps our weather pattern stable with a bit above normal temperatures. The graphics for days 1-3 show a frontal system falling apart just to our north. The graphics for days 3-7 Tuesday through Saturday show a frontal system moving through Tuesday and Wednesday with another approaching the coast next Thursday and Friday. So far the wildfire smoke has been staying in Eastern Lane County, but if the winds shift that might not be the case. Haze over Eugene and Springfield is the only sign of the wildfires.
________________
Air Quality Index:
Eugene/Springfield: The Air Quality Index is 32 in the Good category measuring Ozone.
Oakridge: The Air Quality Index is 62 in the Moderate category measuring Particulate Matter.
Cottage Grove: The Air Quality Index is 27 in the Good category measuring Ozone.
Data courtesy of Lane Regional Air Protection Agency (LRAPA)
________________
ADVISORIES:
- AN AIR QUALITY ADVISORY IS IN EFFECT UNTIL 11 PM SUNDAY FOR KLAMATH COUNTY AND LAKE COUNTY.
- AN AIR QUALITY ADVISORY IS IN EFFECT UNTIL FURTHER NOTICE FOR DESCHUTES COUNTY.
HEALTH ADVISORIES:
- THE PUBLIC HEALTH ADVISORY ISSUED FOR UNSAFE LEVELS OF FECAL BACTERIA IN OCEAN WATERS AT SEAL ROCK BEACH IN LINCOLN COUNTY HAS BEEN LIFTED. VISITORS SHOULD STILL AVOID WADING IN AREA CREEKS, POOLS OF WATER ON THE BEACH, OR IN DISCOLORED WATER, AND STAY CLEAR OF WATER RUNOFF FLOWING INTO THE OCEAN.
- 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.
__________
Forecast for the Southern and lower Mid Willamette Valley including Eugene-Springfield and Albany-Corvallis:
- Mostly sunny today, mostly clear tonight,
- Mostly sunny and a bit warmer Sunday, partly cloudy at night,
- Partly cloudy and a bit cooler Monday, then partly cloudy Monday night.
- highs 92-93 cooling to 89 Monday lows near 57.
- A mix of clouds and sun and a bit cooler Tuesday, partly cloudy in the evening, mostly cloudy late Tuesday night,
- A mix of clouds and sun and a bit cooler with a slight (20%) chance of showers Wednesday, just partly cloudy at night,
- Partly cloudy and a bit warmer Thursday, mostly clear Thursday night,
- Then mostly sunny and a bit warmer Friday.
- highs 86-92 lows near 58. (seasonal averages high 86 low 52)
__________
Eugene-Springfield Pollen Count:
Grass Pollen: Absent (0)
Weeds: Low (5)
Tree Pollen: Absent (0)
Last counted: 7.31.23
Data courtesy of Oregon Allergy Associates.
*It looks like the pollen season is just about over.
__________
Forecast for the Umpqua Valley including Roseburg:
- Sunny and hazy and a bit warmer today, evening haze, mostly clear tonight,
- Sunny Sunday, clear at night,
- Sunny and a bit cooler Monday, then partly cloudy Monday night.
- highs 92-90 lows 62-60.
- Partly cloudy Tuesday, partly cloudy at night,
- Partly cloudy Wednesday and at night,
- Some AM clouds, sunny and a bit warmer Thursday afternoon, mostly clear Thursday night,
- Then mostly sunny and a bit warmer Friday.
- highs 87-94 lows near 62. (seasonal averages high 87 low 58)
___________
Forecast for The South Oregon Coast Including Coos Bay and North Bend:
- Mostly cloudy and hazy and a bit warmer today, partly cloudy with inland evening haze, mostly cloudy late tonight,
- Some AM clouds, sunny Sunday afternoon, mostly clear in the evening, partly cloudy late at night,
- Partly cloudy Monday, then mostly cloudy Monday night.
- highs near 76 lows 58-60.
- Mostly cloudy and a bit warmer Tuesday, mostly cloudy Tuesday night,
- Mostly cloudy Wednesday, mostly cloudy at night,
- Partly cloudy Thursday, partly cloudy Thursday night,
- Then sunny Friday.
- highs near 78 lows 59-57. (seasonal averages high 67 low 54)
__________
Forecast for the Northern Oregon Cascades including the Cascades in Lane County
- Mostly sunny and hazy with a slight (20%) chance of showers and a bit cooler today, mostly clear with a slight (20%) chance of evening showers, just mostly clear late tonight,
- Mostly sunny and a bit warmer Sunday, mostly clear at night,
- AM sun, partly cloudy and a bit warmer Monday afternoon, then partly cloudy Monday night.
- snow level above 8,000 ft. today and tonight, free air freezing level 13,000 ft. Sunday, 14,000 ft. Sunday night and Monday, then 15,000 Monday night.
- highs 72-74 lows 49-47.
- Partly cloudy and a bit cooler Tuesday, partly cloudy in the evening, mostly cloudy late Tuesday night,
- Clouds and sun with a slight (20%) chance of AM showers, a mix of clouds and sun and a bit cooler Wednesday afternoon, partly cloudy at night,
- Some AM clouds, sunny and a bit warmer Thursday afternoon, mostly clear Thursday night,
- Then mostly sunny and a bit warmer Friday.
- free air freezing level 15,000 ft. Tuesday, 14,000 ft. Tuesday night, snow level above 8,000 ft. Wednesday, then free air freezing level 15,000 ft. Wednesday night through Friday.
- highs 72-70 warming to 78 Friday lows near 48.
__________
For all of your Eugene-Springfield and Lane County News, Weather, and Sports go to: EugeneDailyNews.com
________