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April 27, 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

  • A FLOOD WATCH IS IN EFFECT FOR THE SILVIES RIVER NEAR BURNS AFFECTING HARNEY COUNTY UNTIL FURTHER NOTICE DUE TO SNOW MELT.

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 seriously warming 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  Saturday through next Wednesday 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, mostly sunny and a bit warmer this afternoon, clear tonight,
  • Mostly sunny and warmer Friday, mostly clear at night,
  • Mostly sunny and a bit cooler Saturday, clear in the evening, then partly cloudy late Saturday night,
  • highs 76-86 cooling to 79 Saturday lows 49-52 cooling to 46 Saturday night.
  • A mix of clouds and sun and colder Sunday, partly cloudy with a slight (20%) chance of evening showers, mostly cloudy with a slight (20%) chance of showers late Sunday night,
  • Mostly cloudy with a (40%) chance of showers and a bit cooler Monday, partly cloudy with a slight (20%) chance of showers at night,
  • A mix of clouds and sun and a bit warmer with a slight (20%) chance of showers Tuesday, partly cloudy with a slight (20%) chance of showers Tuesday night,
  • Then a mix of clouds and sun with a slight (20%) chance of showers Wednesday.
  • highs 62-59 warming to 62 Tuesday and Wednesday lows 45-43 warning back t0 45 Tuesday night. (seasonal averages high 64 low 41)

Forecast for the Umpqua Valley including Roseburg:

  • Some AM clouds, sunny this afternoon, clear tonight,
  • Sunny and a bit warmer Friday, mostly clear at night,
  • AM clouds, sunny and cooler Saturday afternoon, then mostly clear Saturday night.
  • highs 80-92 cooling to 82 Saturday lows 55-49.
  • Mostly cloudy with a slight (20%) chance of AM showers, just mostly cloudy and cooler Sunday afternoon, a slight (20%) chance of showers Sunday night,
  • Mostly cloudy and a bit cooler with a (30%) chance of showers Monday, a slight (20%) chance of showers at night,
  • Mostly cloudy and a bit warmer with a slight (20%) chance of showers Tuesday, a (30%) chance of showers Tuesday night,
  • Then mostly cloudy and a bit warmer with a slight (20%) chance of showers Wednesday.
  • highs 63-60 warming to 64 Wednesday lows near 46. (seasonal averages high 66 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,
  • Sunny and a bit warmer Friday, becoming mostly cloudy in the evening, just mostly clear late at night,
  • Partly cloudy and cooler Saturday, then partly cloudy Saturday night.
  • highs 65-72 cooling back to 65 Saturday lows 48-45.
  • Mostly cloudy and a bit cooler Sunday, mostly cloudy with a slight (20%) chance of showers Sunday night,
  • Mostly cloudy with a (30%) chance of showers and a bit cooler Monday, a slight (20%) chance of showers at night,
  • Mostly cloudy and a bit cooler with a slight (20%) chance of showers Tuesday, partly cloudy in the evening, then mostly cloudy with a slight (20%) chance of showers late Tuesday night and Wednesday.
  • highs 57-55 lows near 43. (seasonal averages high 58 low 45)

Forecast for the Northern Oregon Cascades including Willamette Pass:

  • Mostly sunny and a bit warmer today, mostly clear tonight,
  • Sunny and a bit warmer Friday, mostly clear at night,
  • Mostly sunny and a bit cooler Saturday, then mostly clear Saturday night.
  • free air freezing level 3,000 ft. today, 13,000 ft. rising to 14,000 ft. tonight, 14,000 ft. Friday, 13,000 ft. Friday night and Saturday, then 12,000 ft. Saturday night.
  • highs 63-74 lows  43-45 cooling to 39 Saturday night.
  • Partly cloudy with a slight (20%) chance showers and colder Sunday, mostly cloudy with a good (50%) chance of showers late Sunday 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 showers at night,
  • A mix of clouds and sun and a bit warmer with a good (50%) chance of showers Tuesday, mostly cloudy with a (40%) chance of evening showers, partly cloudy with a (40%) chance of showers late Tuesday night,
  • Then a mix of clouds and sun with good (50%) chance of showers Wednesday.
  • snow level 7,500 ft. Sunday, 6,000 ft. Sunday night, 5,500 ft Monday, 6,000 ft. Monday night, 6,500 ft. Tuesday, then 7,000 ft. Tuesday night and Wednesday.
  • highs 72-55 cooling to 47 Monday warming to 53 Tuesday lows  40-32.