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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 over 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.

Forecast For The South Willamette Valley Including Eugene-Springfield:

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

Forecast for the Umpqua Valley including Roseburg:

  • Sunny and a bit cooler today, mostly clear tonight,
  • Sunny and a bit warmer Monday, mostly clear at night,
  • Sunny and a bit warmer Tuesday, partly cloudy with a slight (20%) chance of evening thunderstorms, then just mostly cloudy late Tuesday night.
  • highs 77-89 lows 52-56.
  • Partly cloudy and a bit cooler with a slight (20%) chance of showers Wednesday and Wednesday night,
  • Partly cloudy and a bit cooler with a slight (20%) chance of showers Thursday, a slight (20%) chance of showers at night,
  • Partly cloudy and a bit cooler with a slight (20%) chance of showers Friday, then partly cloudy and a bit cooler Friday night and Saturday.
  • highs 84-78 lows near 54. (seasonal averages high 74 low 51)

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

  • Sunny today and breezy (Wind: N 10-20 mph increasing to N 20-25 mph gusts to 40 this afternoon), mostly clear tonight and breezy (Coastal Wind: N 20-25 mph decreasing to N 10-20 mph this evening and tonight while (Inland Wind: N 10-20 mph decreasing to N 5-10 mph late at night),
  • Sunny and a bit warmer Monday, mostly clear at night,
  • Sunny and a bit warmer Tuesday, partly cloudy in the evening, then mostly cloudy Tuesday night.
  • highs 64-68 lows near 48.
  • Mostly cloudy and a bit cooler with Wednesday, mostly cloudy Wednesday night,
  • Mostly cloudy with a slight (20%) chance of AM showers, partly cloudy with a slight (20%) chance of showers Thursday afternoon, mostly cloudy at night,
  • Then mostly cloudy Friday through Saturday.
  • highs near 65 lows near 50. (seasonal averages high 63 low 50)

Forecast for the Northern Oregon Cascades including Willamette Pass:

  • Mostly sunny and a bit cooler today, mostly clear tonight,
  • Mostly sunny and a bit warmer Monday, partly cloudy at night,
  • Mostly sunny start, partly cloudy and a bit warmer with a slight (20%) chance of showers Tuesday afternoon, a (40%) chance of evening showers, then just partly cloudy late Tuesday night.
  • free air freezing level 12,000 ft. tonight and Sunday, 13,000 ft. Sunday night through Monday night, then snow level above 8,000 ft. Tuesday and Tuesday night.
  • highs 72-79 lows 46-49.
  • Partly cloudy with a slight (20%) chance of AM showers, a bit cooler with a good (50%) chance of showers Wednesday afternoon and evening, partly cloudy with a slight (20%) chance of showers late Wednesday 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 Thursday afternoon, partly cloudy with a (40%) chance of evening showers, just partly cloudy late at night,
  • Partly cloudy with a slight (20%) chance of AM showers, a bit cooler with a (40%) chance of showers Friday afternoon and evening, just partly cloudy Friday  night,
  • Partly cloudy with a slight (20%) chance of AM showers, then a (30%) chance of showers and a bit cooler Saturday afternoon.
  • snow level above 8,000 ft. Wednesday through Saturday.
  • highs 74-63 lows 46-42.