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April 25, 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 RECREATIONAL HEALTH ADVISORY IS IN EFFECT FOR THE SOUTH UMPQUA RIVER AND MAINSTEM UMPQUA RIVER. THE ADVISORY COVERS THE SOUTH UMPQUA RIVER FROM CANYONVILLE DOWNSTREAM TO THE CONFLUENCE OF THE MAINSTEM UMPQUA RIVER, AND THE MAINSTEM UMPQUA RIVER DOWNSTREAM PAST ELKTON TO LAWSON BAR. PEOPLE IN THE BEDROCK ALONG THE RIVERS EDGE ARE ARE KNOWN TO DEVELOP CYANOBACTERIA (BLUE-GREEN ALGAE) BLOOMS THAT CAN BE HARMFUL TO PETS AND PEOPLE IF ACCIDENTAL INGESTION OCCURS. SIGNS HAVE BEEN POSTED AT SEVERAL ACCESS AREAS ALONG THE RIVER.

THE WEATHER PATTERN

An Upper Level High Pressure Ridge is moving in to dry us out and seriously warm us up to not only normal temperatures, but even above normal temperatures. The graphics for days 1-3  Show no frontal systems moving into Oregon. The graphics for days 3-7  Friday through next Tuesday show a quiet weather pattern until a frontal system slides into the Pacific Northwest next Sunday and Monday.

Forecast For The South Willamette Valley Including Eugene-Springfield:

  • Some AM clouds, sunny and a bit warmer this afternoon, mostly clear tonight,
  • Partly cloudy and a bit warmer Wednesday, partly cloudy at night,
  • AM sun, partly cloudy and a bit warmer Thursday afternoon, then mostly clear Thursday night.
  • highs 64-77 lows 42-50.
  • Mostly sunny and a bit warmer Friday, clear Friday night,
  • Mostly sunny and a bit cooler Saturday, mostly clear at night,
  • A mix of clouds and sun and cooler Sunday, partly cloudy with a slight (20%) chance of showers Sunday night,
  • Then partly cloudy and a bit cooler with a slight (20%) chance of showers Monday.
  • highs 84-59 lows 50-43. (seasonal averages high 63 low 41)

Forecast for the Umpqua Valley including Roseburg:

  • Some AM clouds, sunny and warmer this afternoon, mostly clear tonight,
  • Some AM clouds, sunny and warmer Wednesday afternoon, mostly clear at night,
  • Sunny and a bit warmer Thursday, then clear Thursday night.
  • highs 69-83 lows 45-54.
  • Sunny and a bit warmer Friday, clear Friday night,
  • Mostly sunny and a bit cooler Saturday, mostly clear at night,
  • Partly cloudy and cooler Sunday, partly cloudy Sunday night,
  • Then partly cloudy and a bit cooler with a slight (20%) chance of rain Monday.
  • highs 89-62 lows 55-44. (seasonal averages high 65 low 44)

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

  • Some AM clouds, sunny and a bit warmer this afternoon, mostly clear tonight,
  • Partly cloudy and a bit warmer Wednesday, mostly clear at night,
  • Sunny and a bit warmer Thursday, then clear Thursday night.
  • highs 62-69 lows 45-48.
  • Mostly sunny and a bit warmer Friday, mostly clear Friday night,
  • Partly cloudy and cooler Saturday and at night,
  • Mostly cloudy and cooler Sunday, partly cloudy Sunday night,
  • Partly cloudy with a slight (20%) chance of AM rain, then just partly cloudy and a bit cooler Monday afternoon.
  • highs 70-55 lows 47-42. (seasonal averages high 57 low 45)

Forecast for the Northern Oregon Cascades including Willamette Pass:

  • Mostly sunny and a bit warmer today, mostly clear tonight,
  • Partly cloudy and warmer Wednesday, mostly clear at night,
  • Mostly sunny and a bit warmer Thursday, then mostly clear Thursday night.
  • free air freezing level 8,000 ft. rising to 11,000 ft. today, 11,000 ft. falling to 10,000 ft. late tonight, 11,000 ft. Tuesday night, 11,000 ft. rising to 12,000 ft. Wednesday afternoon, 12,000 ft. Wednesday night, 13,000 ft. Thursday, then 14,000 ft. Thursday night.
  • highs 55-69 lows 35-42.
  • Sunny and a bit warmer Friday, clear Friday night,
  • Mostly sunny and a bit cooler Saturday, mostly clear at night,
  • Partly cloudy with a slight (20%) chance showers and cooler Sunday afternoon, a (30%) chance of evening showers, a slight (20%) chance of showers late Sunday night,
  • Mostly cloudy with a (40%) chance of AM snow showers, then a mix of clouds and sun with a (40%) chance of showers and a bit cooler Monday afternoon.
  • free air freezing level 13,000 ft. Friday through Saturday night, snow level 8,000 ft. Sunday, 6,500 ft. Sunday night, then 5,500 ft Monday.
  • highs 73-48 lows  44-33.