August 6, 2023
Note: Weather is a constantly changing phenomenon and weather forecasting is a combination of science, experience, and intuition. The accuracy of any given forecast can chance due to unexpected changes in atmospheric conditions, so there are no guarantees the the actual weather will conform to the projected forecast.
ADVISORIES
- AN AIR QUALITY ADVISORY IS IN EFFECT UNTIL 5 PM MONDAY FOR THE SOUTH WILLAMETTE VALLEY, THE CASCADE FOOTHILLS IN LANE COUNTY, AND THE CASCADES IN LANE COUNTY.
- AN AIR QUALITY ADVISORY IS IN EFFECT UNTIL FURTHER NOTICE FOR KLAMATH COUNTY AND LAKE COUNTY.
- AN AIR QUALITY ADVISORY IS IN EFFECT UNTIL 5 PM MONDAY FOR DESCHUTES COUNTY.
HEALTH ADVISORIES
- A RECREATIONAL USE HEALTH ADVISORY IS IN EFFECT FOR GALESVILLE RESERVOIR IN DOUGLAS 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 THE GALESVILLE RESERVOIR 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 PETSAn 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. Haze and smoke have finally reached Eugene and Springfield. AND PEOPLE IF ACCIDENTAL INGESTION OCCURS. SIGNS HAVE BEEN POSTED ALONG SEVERAL ACCESS AREAS ALONG THE RIVER.
THE WEATHER PATTERN
- 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 weak cold front moving into the Pacific Northwest Monday and a stronger cold front will push in between Tuesday and Wednesday. The graphics for days 3-7 Wednesday through Sunday show the frontal system moving through Wednesday.
Forecast For The South Willamette Valley Including Eugene-Springfield:
- Partly cloudy this evening, cloudy late tonight,
- Mostly cloudy start, partly cloudy Monday afternoon, partly cloudy Monday night,
- Some AM clouds, sunny and a bit warmer Tuesday afternoon, partly cloudy with a slight (20%) chance of showers late at night,
- Partly cloudy and a bit cooler with a slight (20%) chance of showers Wednesday, then just partly cloudy Wednesday night.
- lows 59-56 warming back to 59 Wednesday night highs 88-90 cooling to 86 Wednesday.
- Some AM clouds, sunny and a bit warmer Thursday afternoon, clear Thursday night,
- Then sunny and a bit warmer Friday and Saturday, clear both nights,
- Then sunny and a bit warmer Sunday.
- highs 88-95 lows 56-58. (seasonal averages high 86 low 52)
Forecast for the Umpqua Valley including Roseburg:
- Mostly clear with haze this evening, mostly cloudy and hazy late tonight,
- Mostly cloudy with AM haze, partly cloudy and a bit cooler Monday afternoon and Monday night,
- Sunny and a bit warmer Tuesday, mostly clear at night,
- Mostly sunny and a bit cooler Wednesday, then mostly clear Wednesday night.
- lows 62-59 warming back to 62 Wednesday night highs 88-92 cooling to 89 Wednesday.
- Mostly sunny and a bit warmer Thursday and Friday, clear both nights,
- Then sunny and a bit warmer Saturday and Sunday, mostly clear Saturday night.
- highs 90-97 lows 60-62. (seasonal averages high 87 low 58)
Forecast for the Oregon Coast including Coos Bay and North Bend:
- Mostly cloudy with inland evening haze, mostly cloudy with coastal haze tonight,
- Mostly cloudy start, partly cloudy and a bit warmer Monday afternoon, mostly cloudy Monday night,
- AM clouds, sunny and a bit cooler Tuesday afternoon, mostly clear in the evening, partly cloudy late at night,
- AM clouds, sunny and a bit warmer Wednesday afternoon, partly cloudy in the evening, then mostly cloudy late Wednesday night.
- lows 62-59 highs 79-77 warming back to 79 Wednesday.
- Mostly sunny Thursday and Friday, mostly clear both nights,
- Mostly sunny Saturday, mostly clear in the evening, partly cloudy Saturday night,
- Then sunny Sunday.
- highs near 78 lows near 58. (seasonal averages high 67 low 54)
Forecast for the Northern Oregon Cascades including Willamette Pass:
- Partly cloudy with evening haze, mostly cloudy late tonight,
- Mostly cloudy start, partly cloudy and a bit warmer Monday afternoon, partly cloudy Monday night,
- Some AM clouds, mostly sunny and a bit warmer Tuesday afternoon, partly cloudy at night,
- Some AM clouds, mostly sunny and a bit cooler Wednesday afternoon, then partly cloudy Wednesday night.
- free air freezing level 13,000 ft. rising to 14,000 ft. late tonight, 13,000 ft. Monday, 13,000 ft. rising to 15,000 late Monday night, 15,000 ft. Tuesday and Tuesday night, 14,000 ft. Wednesday, then 15,000 ft. Wednesday night.
- lows near 47 highs 72-76 cooling back to 72 Wednesday.
- Mostly sunny and a bit warmer Thursday, clear Thursday night,
- Mostly sunny and a bit warmer Friday, mostly clear at night,
- Sunny and a bit warmer Saturday, mostly clear Saturday night,
- Then mostly sunny and a bit warmer Sunday.
- free air freezing level 15,000 ft. Thursday through Saturday, then 16,000 ft. Saturday night and Sunday.
- highs 74-82 lows 48-52.