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May 15, 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

  • No Advisories 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 Low Pressure Trough (“U” shape) is moving inland assuring frontal systems will move through bringing even more rain. The graphics for days 1-3 show the frontal system that brought more rain to the Pacific Northwest Saturday and the next one approaching today. The graphics for days 3-7  Wednesday through Sunday show the frontal system through Wednesday into Early Thursday.

Forecast for the South Willamette Valley including Eugene-Springfield:

  • Cloudy with patchy AM fog, a mix of clouds and sun and a bit warmer this afternoon, partly cloudy in the evening, mostly cloudy with patchy fog and late tonight,
  • Cloudy with patchy AM fog, a mix of clouds and sun and a bit cooler Monday afternoon, partly cloudy at night,
  • Partly cloudy and a bit cooler Tuesday and in the evening, then mostly cloudy with a slight (20%) chance of rain late Tuesday night.
  • highs 70-65 lows 48-39 warming to 45 Tuesday night.
  • Mostly cloudy with rain and a bit cooler Wednesday, evening showers likely (70%), then a good (50%) chance of showers late Wednesday night,
  • Mostly cloudy with AM showers likely (70%), a bit cooler with a good (50%) chance of showers Thursday afternoon, partly cloudy with a (40%) chance of evening showers, a slight (20%) chance of showers late at night,
  • A mix of clouds and sun and a bit warmer with a slight (20%) chance of showers Friday, partly cloudy Friday night,
  • Then partly cloudy and a bit warmer Saturday.
  • highs 60-58 warming to 65 Saturday lows 43-39 warming to 42 Friday night. (Seasonal Averages high 68 low 44)

Forecast for the Umpqua Valley including Roseburg:

  • Mostly cloudy with patchy AM fog, partly cloudy with a slight (20%) chance of rain this afternoon, partly cloudy with a slight (20%) chance of evening showers, mostly cloudy with a slight (20%) chance of showers tonight,
  • Mostly cloudy start, partly cloudy and cooler Monday afternoon, mostly clear in the evening, partly cloudy with patchy fog late at night,
  • Partly cloudy and a bit warmer Tuesday and in the evening, then mostly cloudy Tuesday night.
  • highs 75-66 warming to 68 Tuesday lows 49-43 warming to 46 Tuesday night.
  • Mostly cloudy with a (30%) chance of AM rain, rain likely (70%) and a bit cooler Wednesday afternoon, mostly cloudy with a (40%) chance of showers Wednesday night,
  • Mostly cloudy with a good (50%) chance of AM showers, a bit cooler with a (40%) chance of showers and a slight (20%) of thunderstorms Thursday afternoon, a slight (20%) chance of evening showers, just mostly cloudy late at night,
  • Mostly cloudy start, partly cloudy and a bit warmer Friday, partly cloudy Friday night,
  • Then partly cloudy and a bit warmer Saturday.
  • highs 64-66 warming to 72 Saturday lows 46-42 warming to 44 Friday night. (Seasonal Averages high 71 low 48).

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

  • Mostly cloudy with patchy AM fog and a slight (20%) chance of coastal showers and a bit warmer with a slight (20%) chance of coastal rain this afternoon while mostly cloudy inland in the AM and partly cloudy with a slight (20%) chance of inland rain and a bit warmer this afternoon, mostly cloudy with a slight (20%) chance of showers tonight,
  • Mostly cloudy with a slight (20%) chance of AM showers, partly cloudy and a bit cooler Monday afternoon, partly cloudy with patchy inland fog late at night,
  • Patchy AM fog, partly cloudy Tuesday, then mostly cloudy with a slight (20%) chance of rain late Tuesday night.
  • highs 65-60 lows 49-42.
  • Mostly cloudy with rain likely (70%) Wednesday, a (30%) chance of showers Wednesday night,
  • Mostly cloudy and a bit cooler with a (30%) chance of showers Thursday, a slight (20%) chance of showers at night,
  • Partly cloudy and a bit warmer Friday, partly cloudy Friday night,
  • Then partly cloudy and a bit warmer Saturday.
  • highs 60-58 warming to 64 Saturday lows 44-42. (Seasonal Averages high 61 low 48)

Forecast for the Northern Oregon Cascades including Willamette Pass:

  • Mostly cloudy and a bit warmer with a slight (20%) chance of rain and a bit warmer late this afternoon, partly cloudy with a (40%) chance of evening showers, just mostly cloudy late tonight,
  • Mostly cloudy with a slight (20%) chance of AM showers, mostly cloudy and cooler Monday afternoon, just partly cloudy at night,
  • Partly cloudy Tuesday, partly cloudy in the evening, mostly cloudy late night.
  • snow level above 8,000 ft. this afternoon, 7,000 ft. late tonight, 6,000 ft. Monday, free air freezing level 9,000 ft. late Monday night, 9,000 ft. Tuesday afternoon, then 10,000 ft. Tuesday night.
  • highs 66-54 lows 37-30 warming to 37 Tuesday night.
  • Mostly cloudy with a good (50%) chance of AM rain, rain likely (70%) and cooler Wednesday afternoon, evening rain and snow likely (70%), a good (50%) chance of showers Wednesday night,
  • Mostly cloudy with a good (50%) chance of AM showers, showers likely (70%) and a bit cooler Thursday afternoon, (40%) chance of showers late at night,
  • Clouds and sun with a slight (20%) chance of AM showers, a mix of clouds and sun and a bit warmer with a (30%) chance of showers Friday afternoon, just partly cloudy Friday night,
  • Then partly cloudy and a bit warmer Saturday.
  • snow level 6,000 ft. Wednesday, 6,000 ft. falling to 4,000 ft. late Wednesday night, 4,000 ft. Thursday afternoon, 3,500 ft. late Thursday night, 3,000 ft. rising to 4,000 ft. Friday afternoon, free air freezing level 7,000 ft. Friday night, then 6,000 ft. rising to 8,000 ft. Saturday afternoon.
  • highs 43-39 warming to 52 Saturday lows 28-26 warming to 32 Saturday.