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May 22, 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

  • A WIND ADVISORY IS IN EFFECT FROM 5 AM UNTIL 5 PM TODAY FOR THE LOWER COLUMBIA BASIN OF OREGON AND THE FOOTHILLS OF THE SOUTHERN BLUE MOUNTAINS OF OREGON.

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 Low Pressure Trough (“U” shape ) is approaching the West Coast bringing unsettled weather. The graphics for days 1-3  show a frontal  system moving into Oregon today. The graphics for days 3-7     Saturday through Wednesday show a cold front that will push into the Pacific Northwest Wednesday.

Forecast For The South Willamette Valley Including Eugene-Springfield:

  • Mostly sunny with a slight (20%) chance of  showers and a bit cooler today (under 0.10 in. of rain possible), just partly cloudy tonight,
  • Mostly sunny and a bit warmer Thursday, mostly clear in the evening, partly cloudy late at night,
  • A mix of clouds and sun Friday, then mostly cloudy with a good (50%) chance of showers Friday night.
  • highs 62-68 lows 43-47.
  • A mix of clouds and sun and a bit cooler with a (40%) chance of showers Saturday, partly cloudy Saturday night,
  • Mostly sunny and a bit warmer Sunday, partly cloudy at night,
  • Mostly sunny and a bit warmer Monday (Memorial Day), partly cloudy Monday night,
  • Then a mix of clouds and sun Tuesday.
  • highs 64-74 lows 42-48.  (seasonal averages high 69 low 45)

Forecast for the Umpqua Valley including Roseburg:

  • Mostly cloudy with a (30%) chance of AM showers (under 0.10 in. of rain possible, snow level 3,500 ft.), just partly cloudy and cooler this afternoon just partly cloudy tonight (under 0.10 in. of rain possible),
  • Some AM clouds, sunny and a bit warmer Thursday afternoon, mostly clear with patchy fog late at night,
  • Partly cloudy and a bit warmer Friday, then mostly cloudy with a slight (20%) chance of rain Friday night,
  • highs 65-73 lows 44-49.
  • Mostly cloudy with a slight (20%) chance of rain and a bit cooler Saturday, partly cloudy Saturday night,
  • Partly cloudy and a bit warmer, Sunday, mostly clear at night,
  • Mostly sunny and a bit warmer Monday (Memorial Day), mostly clear in the evening, partly cloudy late Monday night,
  • Mostly cloudy start, then partly cloudy and a bit cooler with a slight (20%) chance of rain Tuesday afternoon.
  • highs 66-78 cooling to 76 Tuesday lows 44-50. (seasonal average high 72 low 49)

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

  • Mostly cloudy with a slight (20%) chance of AM showers, just partly cloudy this afternoon, partly cloudy this evening, mostly cloudy with patchy coastal fog late tonight,
  • Sunny and a bit warmer Thursday, mostly clear in the evening,  partly cloudy with patchy fog late at night,
  • Partly cloudy with patchy AM fog, mostly cloudy Friday afternoon, then mostly cloudy with a slight (20%) chance of rain Friday night.
  • highs 59-62 lows 43-47.
  • Mostly cloudy and a bit cooler with a slight (20%) chance of rain Saturday, partly cloudy with patchy fog Saturday night,
  • Partly cloudy and a bit warmer Sunday, partly cloudy with patchy fog at night,
  • Partly cloudy and a bit warmer Monday (Memorial Day), partly cloudy in the evening, mostly cloudy with patchy fog late Monday night,
  • Mostly cloudy with patchy AM fog, then a slight (20%) chance of rain Tuesday afternoon.
  • highs 59-63 lows 43-47. (seasonal average high 61 low 49)

Forecast for the Northern Oregon Cascades including Willamette Pass:

  • Mostly cloudy with a (30%) chance of AM rain and snow showers, a mix of clouds and sun with a slight (20%) chance of rain and snow showers and cooler this afternoon (0.25 in. of rain possible, 2 in. of snow possible), mostly cloudy with a good (50%) chance of evening rain and snow showers, a slight (20%) chance of rain and snow showers late tonight (under 0.10 in. of rain possible),
  • Sunny and warmer Thursday, mostly clear in the evening, just just partly cloudy late at night,
  • Mostly sunny and a bit warmer Friday, then mostly cloudy with a good (50%) rain and snow showers Friday night.
  • snow level 4,500 ft. today, 4,000 ft. tonight, free air freezing level 5,500 ft. rising t0 8,000 ft. Thursday afternoon, 9,000 ft. Thursday night and Friday, then snow level 6,500 ft. Friday night.
  • highs 42-56 lows 30-35.
  • A mix of clouds and sun and cooler with a good (50%) chance of rain and snow showers Saturday, partly cloudy with a slight (20%) chance of showers Saturday night,
  • Mostly sunny and warmer Sunday, mostly clear at night,
  • Sunny and a bit warmer Monday (Memorial Day), mostly clear in the evening, partly cloudy Monday night,
  • Then mostly sunny with a (40%) chance of showers Tuesday.
  • snow level 5,00 ft. Saturday, 5,500 ft. Saturday night, free air freezing level 9,000 ft. Sunday, 10,000 ft. Sunday night, 11,000 ft. Monday, 12,000 ft. Monday night, then snow level above 8,000 ft. Tuesday.
  • highs 47-67 lows 32-42.