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May 31, 2024

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 approaching the West Coast. The graphics for days 1-3  show no frontal systems approaching the Pacific Northwest. The graphics for days 3-7    Monday through Friday show a cold front that will be moving through Oregon Monday followed closely by another complex frontal system next Wednesday.

Forecast For The South Willamette Valley Including Eugene-Springfield:

  • Sunny and a bit warmer today, partly cloudy tonight,
  • A mix of clouds and sun and a bit cooler Saturday, mostly cloudy at night,
  • Mostly cloudy and a bit cooler with a good (50%) chance of rain Sunday, then rain Sunday night.
  • high 77-68 lows 48-56.
  • Mostly cloudy with rain and a bit cooler Monday, a slight (20%) chance  of showers Monday night,
  • Mostly sunny and a bit warmer Tuesday, partly cloudy in the evening, mostly clear late at night,
  • Mostly sunny and a bit warmer Wednesday, mostly clear Wednesday night,
  • Then sunny and a bit warmer Thursday.
  • highs 66-83 lows 47-52.  (seasonal averages high 71 low 46)

Forecast for the Umpqua Valley including Roseburg:

  • Sunny and a bit warmer today, partly cloudy tonight,
  • Partly cloudy and a bit cooler Saturday and in the evening, mostly cloudy late at night,
  • Mostly cloudy with a slight (20%) chance of AM showers, a bit cooler with a (30%) chance of rain Sunday afternoon, evening rain likely (70%), then rain late Sunday night.
  • highs 82-73 lows 50-59.
  • Mostly cloudy with AM rain, a good (50%) of rain and a bit cooler Monday afternoon, a (20%) chance of rain Monday night,
  • Partly cloudy in the AM, sunny and warmer Tuesday afternoon, mostly clear at night,
  • Mostly sunny and a bit warmer Wednesday, mostly clear Wednesday night,
  • Then sunny and a bit warmer Thursday.
  •  highs 68-89 lows 50-57. (seasonal average high 73 low 50)

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

  • Sunny and a bit warmer today, partly cloudy this evening, mostly cloudy late tonight,
  • Mostly cloudy with areas of AM coastal fog while patchy AM inland fog, partly cloudy and a bit cooler Saturday afternoon, mostly cloudy at night,
  • Mostly cloudy with a slight (20%) chance of AM showers, a bit cooler with a good (50%) chance of rain Sunday afternoon, evening rain likely (70%), then rain late Sunday night.
  • highs 66-63 lows 47-52.
  • Mostly cloudy with AM rain, a good (50%) chance of rain Monday afternoon, just mostly cloudy Monday night,
  • Partly cloudy and a bit warmer Tuesday, partly cloudy at night,
  • Partly cloudy and a bit warmer Wednesday, mostly clear Wednesday night,
  • Then mostly sunny and a bit warmer Thursday.
  • highs 63-70 lows 46-52. (seasonal average high 62 low 50)

Forecast for the Northern Oregon Cascades including Willamette Pass:

  • Sunny and warmer today, mostly clear this evening, partly cloudy late tonight,
  • A mix of clouds and sun and cooler Saturday, mostly cloudy with a slight (20%) chance of evening rain. just mostly cloudy at night,
  • AM clouds and sun with a good (50%) chance of rain, mostly cloudy with a good (50%) chance of showers and a bit cooler Sunday afternoon, then mostly cloudy with rain Sunday night.
  • free air freezing level 12,000 ft. today and tonight, 11,000 ft. falling to 10,000 ft. Saturday afternoon, then snow level 8,000 ft. Saturday night, then above 8,000 ft. Sunday and Sunday night.
  • highs 70-57 lows 42-45.
  • Mostly cloudy and a bit cooler with rain and a slight (20%) chance of thunderstorms Monday, a (50%) chance of showers Monday night,
  • Mostly sunny and a bit warmer Tuesday, partly cloudy in the evening, partly cloudy in the evening, mostly clear late at night,
  • Sunny and warmer Wednesday, mostly clear Wednesday night,
  • Then sunny and a bit warmer Thursday.
  • snow level 8,000 ft. Monday and Monday night, free air freezing level 13,000 ft. Tuesday, then 15,000 ft. Tuesday night through Thursday.
  • highs 50-79 lows 37-48.