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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:

  • Partly cloudy tonight,
  • Partly cloudy and a bit warmer Wednesday, partly cloudy Wednesday night,
  • Partly cloudy and a bit warmer Thursday, clear at night,
  • Mostly sunny and a bit warmer Friday, then mostly clear Friday night.
  • lows 42-52 highs 74-83.
  • Mostly sunny and a bit cooler Saturday, mostly clear Saturday night,
  • A mix of clouds and sun and colder Sunday, partly cloudy with a slight (20%) chance of showers at night,
  • Clouds and sun with a slight (20%) chance of AM showers, a bit cooler with a (30%) chance of showers Monday afternoon, mostly cloudy with a slight (20%) chance of evening showers, partly cloudy with a slight (20%) chance of showers late Monday night,
  • Then a mix of clouds and sun and a bit warmer with a (30%) chance of showers Tuesday.
  • highs 79-57 warming to 62 Tuesday lows 46-43 warning t0 45 Monday night. (seasonal averages high 64 low 41)

Forecast for the Umpqua Valley including Roseburg:

  • Mostly clear this evening, partly cloudy late tonight,
  • Partly cloudy and warmer Wednesday, partly cloudy Wednesday night,
  • Some AM clouds, sunny and a bit warmer Thursday afternoon, mostly clear at night,
  • Sunny and a bit warmer Friday, then clear Friday night.
  • lows 45-55 highs 78-90.
  • Mostly sunny and a bit cooler Saturday, mostly clear Saturday night,
  • Mostly cloudy and cooler Sunday, mostly cloudy at night,
  • Mostly cloudy and a bit cooler with a slight (20%) chance of showers and Monday night,
  • Then mostly cloudy with a slight (20%) chance of showers Tuesday.
  • highs 83-59 warming to 63 Tuesday lows 49-44 warming to 46 Monday night. (seasonal averages high 65 low 44)

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

  • Mostly clear this evening, partly cloudy late tonight,
  • Some AM clouds, mostly sunny and a bit warmer Wednesday afternoon, partly cloudy Wednesday night,
  • Some AM clouds, sunny and a bit warmer Thursday afternoon, mostly clear in the evening, mostly cloudy late at night,
  • AM clouds, sunny and a bit warmer Friday afternoon, then mostly clear Friday night.
  • lows 44-48 cooling to 46 Friday night highs 65-72.
  • Mostly sunny and cooler Saturday, mostly clear in the evening, mostly clear in the evening, partly cloudy Saturday night,
  • Mostly cloudy and a bit cooler Sunday, mostly cloudy at night,
  • Mostly cloudy with a slight (20%) chance of showers and a bit cooler Monday, a slight (20%) chance of showers Monday night,
  • Then mostly cloudy and a bit warmer with a slight (20%) chance of showers Tuesday.
  • highs 64-55 warming to 57 Tuesday lows 44-42. (seasonal averages high 57 low 45)

Forecast for the Northern Oregon Cascades including Willamette Pass:

  • Partly cloudy tonight,
  • Partly cloudy and warmer Wednesday, partly cloudy Wednesday night,
  • Partly cloudy and a bit warmer Thursday, mostly clear at night,
  • Sunny and a bit warmer Friday, then clear Friday night.
  • free air freezing level 11,000 ft. rising to 12,000 ft. late tonight, 12,000 ft. Wednesday and Wednesday night, 12,000 ft. rising to 13.000 ft. 13,000 ft. Thursday afternoon, 14,000 ft. Thursday night and Friday, then 13,000 ft. Friday night.
  • lows 36-45 highs 63-74.
  • Mostly sunny and a bit cooler Saturday, mostly clear Saturday night,
  • Partly cloudy with a slight (20%) chance showers and colder Sunday afternoon, a (40%) chance of evening showers, mostly cloudy with a (40%) chance of showers late at night,
  • Mostly cloudy with a good (50%) chance of AM snow showers, a mix of clouds and sun with a good (50%) chance of showers and a bit cooler Monday afternoon, mostly cloudy with a good (50%) chance of evening showers, partly cloudy with a good (50%) chance of showers late Monday night,
  • Then a mix of clouds and sun and a bit warmer with a good (50%) chance of showers Tuesday.
  • free air freezing level 13,000 ft. Saturday and Saturday night, snow level 8,000 ft. Sunday, 6,500 ft. Sunday night, 5,500 ft Monday, 6,000 ft. Monday night, then 6,500 ft. Tuesday.
  • highs 72-55 cooling to 47 Monday warming to 53 Tuesday lows  40-32.