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May 29, 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 a weak frontal system that slid into the Pacific Northwest Tuesday. The graphics for days 3-7  Saturday through Wednesday show a cold front that will be moving through Oregon Saturday and another Sunday followed closely by another complex frontal system Monday and then another next Wednesday.

Forecast For The South Willamette Valley Including Eugene-Springfield:

  • Mostly sunny and a bit warmer today, partly cloudy this evening, mostly clear late tonight,
  • Sunny and a bit warmer Thursday, clear at night,
  • Sunny and a bit warmer Friday, partly cloudy in the evening, then mostly cloudy late Friday night.
  • high 67-77 lows 42-48.
  • A mix of clouds and sun and a bit cooler Saturday, mostly cloudy with a slight (20%) chance of rain Saturday night,
  • Mostly cloudy with a good (50%) chance of showers Sunday, mostly cloudy with a good (50%) chance of rain at night,
  • Mostly cloudy with a good (50%) chance of rain and a bit cooler Monday, a good (50%) chance  of rain Monday night,
  • Then a mix of clouds and sun and a bit warmer with a (30%) chance of rain Tuesday.
  • highs 72-69 warming to 75 Tuesday lows 50-53.  (seasonal averages high 70 low 46)

Forecast for the Umpqua Valley including Roseburg:

  • Some AM clouds, sunny and a bit warmer this afternoon, mostly clear tonight,
  • Some AM clouds, sunny and a bit warmer Thursday afternoon, mostly clear at night,
  • Sunny and a bit warmer Friday, then clear Friday night.
  • highs 70-82 lows 45-52.
  • Partly cloudy start, mostly cloudy and a bit cooler Saturday afternoon, mostly cloudy with a slight (20%) chance of rain Saturday night,
  • Mostly cloudy and a bit cooler with a slight (20%) chance of rain Sunday, a (40%) chance of rain at night,
  • Mostly cloudy and a bit cooler with a (40%) chance of rain Monday, a (30%) chance of rain Monday night,
  • Mostly cloudy slight (20%) chance of AM rain, then partly cloudy and a bit warmer with a slight (20%) chance of rain Tuesday afternoon.
  •  highs 76-72 warming to 77 Tuesday lows 53-56 cooling to 54 Monday night. (seasonal average high 73 low 50)

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

  • Mostly cloudy with patchy AM fog, partly cloudy this afternoon, mostly clear this evening, partly cloudy tonight with patchy inland fog late,
  • Some AM clouds, sunny and a bit warmer Thursday afternoon, mostly clear with patchy fog late at night,
  • Sunny and a bit warmer Friday, then mostly cloudy Friday night.
  • highs 62-65 night lows 43-46.
  • Mostly cloudy Saturday, mostly cloudy with a slight (20%) chance of rain late Saturday night,
  • Mostly cloudy with a (30%) chance of rain Sunday, cloudy with a good (50%) chance of rain at night,
  • Mostly cloudy with a good (50%) chance of rain Monday, a (30%) chance of rain Monday night,
  • Then mostly cloudy with a (30%) chance of rain Tuesday.
  • highs near 65 lows 48-50 cooling back to 48 Monday night. (seasonal average high 62 low 50)

Forecast for the Northern Oregon Cascades including Willamette Pass:

  • Mostly sunny and a bit warmer today, partly cloudy tonight,
  • Sunny Thursday, clear at night.
  • Sunny and warmer Friday, partly cloudy in the evening, then mostly cloudy late Friday night.
  • snow level 5,500 ft. rising to 6,500 ft. this afternoon, free air freezing level 8,000 ft. falling to 9,000 ft. late tonight, 10,000 ft. Thursday, 10,000 ft. rising to 12,000 ft. Thursday night,  then 12,000 ft. Friday and Friday night.
  • highs 52-69 lows 33-42.
  • A mix of clouds and sun and a bit cooler Saturday, mostly cloudy with a (40%) chance of showers Saturday night,
  • A mix of clouds and sun with a good (50%) chance of showers Sunday, mostly cloudy with a good (50%) chance of rain at night,
  • Mostly cloudy with a good (50%) chance of rain Monday and Monday night,
  • Then a mix of clouds and sun and a bit warmer with a (40%) chance of rain Tuesday.
  • free air freezing level 10,000 ft. Saturday, snow level 8,000 ft. Saturday night, then above 8,000 ft. Sunday through Tuesday.
  • highs 67-62 lows 39-43.