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June 4, 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) is moving closer to the Pacific coast and will warm us up into next week.. The graphics for days 1-3  show a cold front continuing to move past the Pacific Northwest today. The graphics for days 3-7   Wednesday through Sunday show a frontal system just to our northwest Friday then moving closer Saturday and beginning to move into the Pacific Northwest next Sunday.

Forecast For The South Willamette Valley Including Eugene-Springfield:

  • Mostly clear tonight,
  • Mostly sunny and a bit cooler Monday, mostly clear Monday night,
  • Sunny and a bit warmer Tuesday, partly cloudy at night,
  • Partly cloudy and a bit cooler Wednesday, then just partly cloudy Wednesday night.
  • low 48-52 highs 75-88.
  • Partly cloudy and a bit cooler Thursday, partly cloudy Thursday night,
  • A mix of clouds and sun and a bit cooler with a slight (20%) chance of showers Friday afternoon, mostly cloudy with a slight (20%) chance of evening showers, just partly cloudy late at night,
  • A mix of clouds and sun with a slight (20%) chance of showers Saturday, partly cloudy with a slight (20%) chance of evening showers, partly cloudy late Saturday night,
  • Then a mix of clouds and sun with a slight (20%) chance of showers Sunday.
  • highs 82-75 lows 52-50.  (seasonal averages high 71 low 46)

Forecast for the Umpqua Valley including Roseburg:

  • Mostly clear tonight,
  • Sunny Monday, mostly clear with a slight (20%) chance of evening thunderstorms, just mostly clear late at night,
  • Sunny and a bit warmer Tuesday with a slight (20%) chance of afternoon thunderstorms, partly cloudy with a slight (20%) chance of evening thunderstorms, just partly cloudy late Tuesday night,
  • Mostly cloudy start, partly cloudy and cooler with a slight (20%) chance of showers Wednesday afternoon, a slight (20%) chance of thunderstorms Wednesday night.
  • lows 52-56 highs 77-89.
  • Mostly cloudy and a bit warmer with a slight (20%) chance of thunderstorms Thursday, a slight (20%) chance of thunderstorms Thursday night,
  • Mostly cloudy and a bit cooler with a slight (20%) chance of thunderstorms Friday and in the evening, mostly cloudy at night,
  • Mostly cloudy and a bit cooler with a slight (20%) chance of showers Saturday and in the evening, just partly cloudy late Saturday night,
  • Mostly cloudy with a slight (20%) chance of AM showers, then partly cloudy with a slight (20%) chance of showers Sunday afternoon.
  • highs 84-78 cooling to 76 Saturday warming back to 78 Sunday lows 55-53. (seasonal averages high 74 low 51)

Forecast for the Oregon Coast including Coos Bay and North Bend:

  • Mostly clear tonight and breezy (Coastal Wind: N 15-25 mph decreasing to N 10-15 mph late tonight while (Inland Wind: N 10-15 mph),
  • Sunny and a bit warmer Monday, mostly clear Monday night,
  • Sunny and a bit warmer Tuesday, mostly cloudy at night,
  • Mostly cloudy and a bit cooler with Wednesday, then mostly cloudy Wednesday night.
  • lows 47-49 highs 67-69 cooling to 65 Wednesday.
  • Mostly cloudy and a bit warmer Thursday afternoon, mostly cloudy Thursday night,
  • Mostly cloudy and a bit cooler Friday, a slight (20%) chance of showers at night,
  • Mostly cloudy and a bit cooler with a slight (20%) chance of showers Saturday, mostly cloudy Saturday night,
  • Mostly cloudy with a slight (20%) chance of AM showers, then partly cloudy Sunday afternoon.
  • highs 66-64 lows near 50. (seasonal averages high 63 low 50)

Forecast for the Northern Oregon Cascades including Willamette Pass:

  • Mostly clear with a slight (20%) chance of evening showers, just clear late tonight,
  • Mostly sunny and a bit warmer with a slight (20%) chance of showers and thunderstorms Monday afternoon, partly cloudy Monday night,
  • Mostly sunny and a bit warmer Tuesday, partly cloudy with a slight (20%) chance of evening showers and thunderstorms, just partly cloudy late Tuesday night,
  • Partly cloudy and a bit cooler with a (40%) chance of showers Wednesday afternoon and evening, then partly cloudy late Wednesday night.
  • snow level above 8,000 ft. tonight and Monday, free air freezing level 13,000 ft. Monday night and Tuesday, then snow level above 8,000 ft. Tuesday night through Wednesday night,
  • lows 46-49 highs 72-79.
  • Clouds and sun with a slight (20%) chance of AM showers, a mix of clouds and sun and a bit cooler with a (40%) chance of showers and thunderstorms Thursday afternoon, mostly cloudy with a (40%) chance of evening showers, partly cloudy with a slight (20%) chance of showers late Thursday night,
  • Clouds and sun with a slight (20%) chance of AM showers, a mix of clouds and sun and a bit cooler with a good (50%) chance of showers Friday afternoon, mostly cloudy with a good (50%) chance of evening showers, just mostly cloudy late at night,
  • A mix of clouds and sun with a (40%) chance of showers and a bit cooler Saturday, mostly cloudy with a (40%) chance of  evening showers, partly cloudy late Saturday night,
  • Clouds and sun with a slight (20%) chance of AM showers, then a mix of clouds and sun with a (30%) chance of showers Sunday afternoon.
  • snow level above 8,000 ft. Thursday through Sunday,
  • highs 74-63 lows 46-42.