Aug
05.
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) keeps our weather pattern stable with a bit above normal temperatures. The graphics for days 1-3 show a frontal system moving in between today and tonight. The graphics for days 3-7 Wednesday through Sunday show a frontal system moving through Wednesday. Wildfire haze and smoke have finally reached Eugene and Springfield.
________________
Air Quality Index:
Eugene/Springfield: The Air Quality Index is 27 in the Good category measuring Ozone.
Oakridge: The Air Quality Index is 21 in the Good category measuring Particulate Matter.
Cottage Grove: The Air Quality Index is 30 in the Good category measuring Ozone.
Data courtesy of Lane Regional Air Protection Agency (LRAPA)
________________
ADVISORIES:
- AN AIR QUALITY ADVISORY IS IN EFFECT UNTIL AT LEAST MONDAY AFTERNOON FOR CENTRAL AND EASTERN LANE COUNTY.COUNTY.
- AN AIR QUALITY ADVISORY IS IN EFFECT UNTIL 11 PM TONIGHT 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 and a bit warmer today, partly cloudy tonight,
- Partly cloudy and a bit cooler Monday, partly cloudy at night,
- Partly cloudy and a bit warmer Tuesday, then partly cloudy Tuesday night.
- highs 90-88 warming back to 90 Tuesday lows 59-56.
- Partly cloudy and a bit cooler with a slight (20%) chance of showers Wednesday, just partly cloudy Wednesday night,
- Partly cloudy and a bit warmer Thursday, mostly clear at night,
- Then mostly sunny and a bit warmer Friday and Saturday, mostly clear Friday night.
- highs 86-94 lows 58-56 warming back to 58 Sunday. (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 over.
__________
Forecast for the Umpqua Valley including Roseburg:
- Some AM clouds, sunny and a bit cooler this afternoon, mostly clear with evening haze, mostly cloudy late tonight,
- Some AM clouds, sunny Monday afternoon, partly cloudy at night,
- Mostly sunny and a bit warmer Tuesday, then mostly cloudy late Tuesday night.
- highs 90-92 lows 62-59.
- Partly cloudy and a bit cooler Wednesday, partly cloudy Wednesday night,
- Partly cloudy and a bit warmer Thursday, mostly clear at night,
- Then mostly sunny and a bit warmer Friday and Saturday, mostly clear Friday night,
- highs 89-95 lows 63-59 warming to 62 Friday night. (seasonal averages high 87 low 58)
___________
Forecast for The South Oregon Coast Including Coos Bay and North Bend:
- Mostly cloudy with patchy AM drizzle, sunny and a bit warmer with coastal haze this afternoon, partly cloudy this evening, mostly cloudy late tonight,
- Mostly cloudy start, partly cloudy and a bit cooler Monday afternoon, partly cloudy in the evening, mostly cloudy late at night,
- Partly cloudy and a bit cooler Tuesday, then partly cloudy Tuesday night.
- highs 79-76 lows 60-58.
- Partly cloudy and a bit warmer Wednesday and in the evening, mostly cloudy late Wednesday night,
- Some AM clouds, sunny Thursday afternoon, mostly clear at night,
- Then mostly sunny Friday and Saturday, mostly clear Friday night.
- highs near 78 lows 60-57. (seasonal averages high 67 low 54)
__________
Forecast for the Northern Oregon Cascades including the Cascades in Lane County:
- Partly cloudy and hazy and a bit warmer today, hazy with areas of evening smoke, partly cloudy and hazy late tonight,
- Partly cloudy and a bit warmer Monday, partly cloudy at night,
- Some AM clouds, sunny and a bit warmer Tuesday, then partly cloudy Tuesday night.
- free air freezing level 13,000 ft. today, 13,000 ft. rising to 14,000 ft. late tonight, 13,000 ft. Monday, 14,000 ft. rising to 15,000 late Monday night, then 15,000 ft. Tuesday night.
- highs 70-75 lows near 47.
- Partly cloudy and a bit cooler Wednesday, partly cloudy Wednesday night,
- Some AM clouds, sunny and a bit warmer Thursday afternoon, mostly clear at night,
- Then mostly sunny and a bit warmer Friday and Saturday, mostly clear Friday night,
- free air freezing level 14,000 ft. Wednesday, 16,000 ft. Wednesday night, 15,000 ft. Thursday, 16,000 ft. Thursday night, then 15,000 ft. Friday through Saturday.
- highs 72-82 lows 48-52.
__________
For all of your Eugene-Springfield and Lane County News, Weather, and Sports go to: EugeneDailyNews.com
________