June 11, 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
- NONE AT THIS TIME.
HEALTH ADVISORIES
- 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.
THE WEATHER PATTERN
June 11, 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
- NONE AT THIS TIME.
HEALTH ADVISORIES
- 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.
THE WEATHER PATTERN
An Upper Level High Pressure Ridge (“Arch” shape) will keep temperatures near or a bit above normal. The graphics for days 1-3 show a frontal system approaching the Pacific Northwest Tuesday morning. The graphics for days 3-7 Wednesday through Sunday show a frontal system tmoving through the Pacific Northwest Saturday into next Sunday.
Forecast For The South Willamette Valley Including Eugene-Springfield:
- Mostly clear, patchy fog late tonight,
- Some AM clouds with patchy fog, sunny and a bit warmer Monday afternoon, clear with patchy fog late Monday night,
- A mix of clouds and sun and a bit cooler Tuesday, mostly clear at night,
- Some AM clouds, mostly sunny and a bit cooler Wednesday afternoon, then mostly clear Wednesday night.
- low 50-52 cooling to 44 Tuesday night and Wednesday night highs 87-75.
- AM sun, partly cloudy and a bit warmer Thursday afternoon, partly cloudy Thursday night,
- A mix of clouds and sun and a bit warmer Friday, partly cloudy with a slight (20%) chance of rain at night,
- A mix of clouds and sun and a bit cooler with a slight (20%) chance of rain Saturday and in the evening, just partly cloudy late Saturday night,
- Then partly cloudy with a slight (20%) chance of rain Sunday afternoon.
- highs 77-80 cooling to 72 Sunday lows 49-53 cooling to 47 Saturday night. (seasonal averages high 73 low 47)
Forecast for the Umpqua Valley including Roseburg:
- Mostly clear, patchy fog late tonight,
- Some AM clouds with patchy fog, sunny and a bit warmer Monday afternoon, clear with patchy fog late Monday night,
- A mix of clouds and sun and a bit cooler Tuesday, mostly clear at night,
- Some AM clouds, mostly sunny and a bit cooler Wednesday afternoon, then mostly clear Wednesday night.
- low 50-52 cooling to 44 Tuesday night and Wednesday night highs 87-75.
- AM sun, partly cloudy and a bit warmer Thursday afternoon, partly cloudy Thursday night,
- A mix of clouds and sun and a bit warmer Friday, partly cloudy with a slight (20%) chance of rain at night,
- A mix of clouds and sun and a bit cooler with a slight (20%) chance of rain Saturday and in the evening, just partly cloudy late Saturday night,
- Then partly cloudy with a slight (20%) chance of rain Sunday afternoon.
- highs 77-80 cooling to 72 Sunday lows 49-53 cooling to 47 Saturday night. (seasonal averages high 73 low 47)
Forecast for the Oregon Coast including Coos Bay and North Bend:
- Partly cloudy this evening, becoming mostly cloudy with patchy coastal fog while areas of inland fog late tonight and Monday AM, sunny and a bit warmer Monday afternoon, partly cloudy in the evening, mostly cloudy late Monday night,
- Mostly cloudy and a bit cooler Tuesday, partly cloudy in the evening, mostly clear late at night,
- Mostly sunny Wednesday, then mostly clear Wednesday night.
- lows 52-46 highs 68-65.
- Mostly sunny and a bit warmer Thursday, partly cloudy Thursday night,
- Mostly cloudy and a bit warmer Friday, mostly cloudy at night,
- Mostly cloudy with a slight (20%) chance of AM showers, just mostly cloudy and a bit cooler Saturday afternoon and evening, partly cloudy late Saturday night,
- Then partly cloudy Sunday.
- highs 66-68 cooling back to 66 Saturday and Sunday lows 48-52 cooling back to 48 Saturday night. (seasonal averages high 63 low 51)
Forecast for the Northern Oregon Cascades including Willamette Pass:
- Mostly clear tonight,
- Mostly sunny start, partly cloudy and a bit warmer Monday with a slight (20%) chance of afternoon and evening showers and thunderstorms, just partly cloudy late Monday night,
- Partly cloudy and a bit cooler Tuesday, mostly clear late at night,
- Some AM clouds, mostly sunny and a bit cooler Wednesday afternoon, then mostly clear Wednesday night.
- free air freezing level 13,000 ft. tonight, snow level above 8,000 ft. Monday and Monday night, free air freezing level 13,000 ft. Tuesday, 14,000 ft. Tuesday night, then 13,000 ft. Wednesday and Wednesday night.
- lows 46-48 cooling to 36 Wednesday night highs 72-62.
- AM sun, partly cloudy and a bit warmer Thursday afternoon, partly cloudy Thursday night,
- Partly cloudy Friday, partly cloudy with a slight (20%) chance of rain at night,
- Partly cloudy with a (30%) chance of rain and a bit cooler Saturday, a slight (20%) chance of rain Saturday night,
- Then partly cloudy with a slight (20%) chance of rain Sunday.
- free air freezing level 13,000 ft. Thursday and Thursday night, 14,000 ft. Friday, snow level above 8,000 ft. Friday night through Saturday night, then 7,000 ft. Sunday.
- highs 68-58 lows 43-37.