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June 6, 2022

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.
  • 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 Low Pressure Trough (“U” shape) will help increase the frontal activity over Oregon. The graphics for days 1-3 show the frontal system that will be offshore Wednesday that falls apart as it approaches the coast.. The graphics for days 3-7   Thursday through Monday show the frontal activity approaching the Pacific Northwest Friday into Saturday, then another one way offshore next Monday.
  • Note: The Hurricane season has officially begun. Hurricane Agatha struck southern Mexico and fell apart. It’s remnants redeveloped in the Gulf of Mexico and moved across South Florida producing torrential rains, then moved over the Atlantic Ocean and became Tropical Storm Alex.

Forecast for the South Willamette Valley including Eugene-Springfield:

  • Partly cloudy late tonight,
  • AM clouds and sun, mostly cloudy and a bit warmer Tuesday afternoon, mostly cloudy with a (40%) chance of evening showers, just mostly cloudy late Tuesday night,
  • Mostly cloudy start, a mix of clouds and sun Wednesday afternoon, mostly cloudy at night,
  • A mix of clouds and sun and a bit warmer Thursday, then mostly cloudy with a good (50%) chance of rain Thursday night.
  • lows 46-53 cooling to 49 Wednesday warming to 59 Thursday night highs 74-80.
  • Mostly cloudy and a bit cooler with a good (50%) chance of rain Friday and in the evening, rain likely (70%) Friday night,
  • Mostly cloudy with AM rain likely (70%), a bit cooler with a good (50%) chance of rain Saturday afternoon and at night,
  • A mix of clouds and sun and a bit cooler with a good (50%) chance of rain Sunday, partly cloudy with a slight (20%) chance of rain Sunday night,
  • Then a mix of clouds and sun with a slight (20%) chance of rain Monday.
  • highs 79-68 lows 60-48. (Seasonal Averages high 72 low 46)

Forecast for the Umpqua Valley including Roseburg:

  • Mostly clear this evening, partly cloudy late tonight,
  • Partly cloudy start, mostly cloudy and warmer Tuesday afternoon, mostly cloudy with a slight (20%) chance of evening showers, just mostly cloudy Tuesday night,
  • Mostly cloudy and a bit warmer Wednesday, then partly cloudy at night,
  • Mostly cloudy Thursday, then mostly cloudy with a slight (20%) chance of showers late Thursday night.
  • lows 50-59 highs 77-84.
  • Mostly cloudy and a bit warmer with a slight (20%) chance of showers Friday, a (40%) chance of showers Friday night,
  • Mostly cloudy with a good (50%) chance of showers and a bit cooler Saturday, a (40%) chance of showers at night,
  • Mostly cloudy with a (40%) chance of AM showers, partly cloudy and a bit cooler with a (30%) chance of showers Sunday afternoon, partly cloudy with a slight (20%) chance of showers Sunday night,
  • Then partly cloudy with a slight (20%) chance of showers Monday.
  • highs 73-69 lows 62-50. (Seasonal Averages high 74 low 51)

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

  • Mostly clear this evening, partly cloudy late tonight,
  • Mostly cloudy and a bit warmer Tuesday, mostly cloudy with a slight (20%) chance of evening showers, just mostly cloudy late Tuesday night (under 0.10 in. of rain possible),
  • Mostly cloudy Wednesday, partly cloudy in the evening, mostly cloudy late at night,
  • Mostly cloudy and a bit warmer Thursday, then mostly cloudy a slight (20%) chance of showers Thursday night.
  • lows 50-55 highs 66-72.
  • Mostly cloudy and a bit warmer with a (30%) chance of showers Friday, a good (50%) chance of showers Friday night,
  • Mostly cloudy and a bit cooler with a good (50%) chance of showers Saturday, a (30%) chance of showers at night,
  • Mostly cloudy with a (40%) chance of AM showers, partly cloudy with a (30%) chance of showers and a bit cooler Sunday afternoon, a slight (20%) chance of evening showers, mostly cloudy with a slight (20%) chance of showers late Sunday night,
  • Partly cloudy with a slight (20%) chance of AM showers, then just partly cloudy and a bit cooler Monday.
  • highs 72-64 lows 55-49. (Seasonal Averages high 63 low 50)

Forecast for the Northern Oregon Cascades including Willamette Pass:

  • Partly cloudy with a slight (20%) chance of evening showers, just partly cloudy late tonight,
  • AM sun, mostly cloudy and warmer Tuesday afternoon, mostly cloudy with a (40%) chance of evening showers, just mostly cloudy Tuesday night (under 0.10 in. of rain possible),
  • Mostly cloudy start, partly cloudy and a bit cooler Wednesday afternoon, mostly cloudy at night,
  • A mix of clouds and sun and a bit warmer Thursday, then mostly cloudy with a slight (20%) chance of rain Thursday night.
  • snow level 6,500 ft. tonight, free air freezing level 12,000 ft. Tuesday, snow level above 8,000 ft. Tuesday night, free air freezing level 11,000 ft. Wednesday, 13,000 ft. Wednesday night and Thursday, then snow level above 8,000 ft. Thursday night.
  • lows 36-44 cooling to 40 Wednesday night warming to 47 Thursday night highs 67-62 warming to 68 Thursday.
  • Clouds and sun with a slight (20%) chance of AM rain, a mix of clouds and sun and a bit warmer with a (40%) chance of rain Friday afternoon, mostly cloudy with a good (50%) chance of rain Friday night,
  • Mostly cloudy and a bit cooler with rain likely (70%) Saturday, mostly cloudy with a good (50%) chance of rain at night,
  • A mix of clouds and sun and a bit cooler with a (40%) chance of rain Sunday, partly cloudy with a slight (20%) chance of evening rain, just mostly cloudy late Sunday night,
  • Then mostly cloudy and a bit cooler with a slight (20%) chance of rain Monday.
  • snow level above 8,000 ft. Friday through Saturday night, 7,500 ft. Sunday, 7,000 ft. Sunday evening, then snow level 5,500 ft. rising to 6,500 ft. Monday afternoon.
  • highs 69-54 lows 48-36.