August 5, 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 AT LEAST MONDAY AFTERNOON FOR CENTRAL AND EASTERN LANE COUNTY.COUNTY.
- 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
- 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) 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.
Forecast For The South Willamette Valley Including Eugene-Springfield:
- Partly cloudy tonight,
- Mostly sunny and a bit warmer Sunday, partly cloudy Sunday night,
- Partly cloudy and a bit cooler Monday, partly cloudy at night,
- Partly cloudy and a bit warmer Tuesday, then partly cloudy Tuesday night.
- lows 59-56 highs 90-88 warming back to 90 Tuesday.
- 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)
Forecast for the Umpqua Valley including Roseburg:
- Mostly clear this evening, partly cloudy late tonight,
- Some AM clouds, sunny and a bit cooler Sunday afternoon, mostly clear with evening haze, mostly cloudy late Sunday night,
- Some AM clouds, sunny Monday afternoon, partly cloudy at night,
- Mostly sunny and a bit warmer Tuesday, then mostly cloudy late Tuesday night.
- lows 62-59 highs 90-92.
- 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 Oregon Coast including Coos Bay and North Bend:
- Partly cloudy this evening, mostly cloudy with patchy drizzle late tonight,
- Mostly cloudy with patchy AM drizzle, sunny and a bit warmer with coastal haze Sunday afternoon, partly cloudy in the evening, mostly cloudy late Sunday night,
- 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.
- lows 62-59 highs 79-76.
- 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 Willamette Pass:
- Partly cloudy with a slight (20%) chance of isolated evening thunderstorms, partly cloudy and hazy late tonight,
- Partly cloudy and hazy and a bit warmer Sunday, hazy with areas of evening smoke, partly cloudy and hazy late Sunday night,
- 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 12,000 ft. rising to 13,000 ft. tonight, 13,000 ft. Sunday, 13,000 ft. rising to 14,000 ft. late Sunday night, 13,000 ft. Monday, 14,000 ft. rising to 15,000 late Monday night, then 15,000 ft. Tuesday night.
- lows near 47 highs 70-75.
- 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.