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June 28, 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

  • The Upper Level Airflow is now Zonal (west to east) bringing cooler air and a front our way. The graphics for days 1-3 show a cold frontal system moving through a little late (overnight) bringing cooler air to Oregon for today. The graphics for days 3-7   Friday through Tuesday show no frontal systems moving into the Pacific Northwest through the period.
  • NOTE: As usual, we have already had the sunny and hot weather that we should have for the Independence Day Holiday weekend, but no.. more clouds, cooler and even a slight chance of a shower for the long 4th of July Holiday weekend.

Forecast for the South Willamette Valley including Eugene-Springfield:

  • AM clouds, becoming mostly sunny and cooler this afternoon, partly cloudy this evening, mostly cloudy late tonight and Wednesday AM, a mix of clouds and sun and a bit cooler in the afternoon, mostly clear Wednesday night,
  • Mostly sunny and a bit warmer Thursday, then mostly clear Thursday night.
  • highs 77-82 lows 50-53.
  • Partly cloudy and a bit cooler Friday, partly cloudy Friday night,
  • A mix of clouds and sun and a bit cooler Saturday, increasing clouds at night,
  • Mostly cloudy and a bit cooler with a slight (20%) chance of showers Sunday and Sunday night,
  • Then a mix of clouds and sun and a bit warmer with a slight (20%) chance of showers Monday (Independence Day).
  • highs 80-70 warming to 73 Monday lows near54. (Seasonal Averages high 78 low 50)

Forecast for the Umpqua Valley including Roseburg:

  • Patchy AM fog. sunny and cooler this afternoon, clear this evening, partly cloudy late tonight and Wednesday AM, sunny in the afternoon, mostly clear Wednesday night,
  • Mostly sunny Thursday, then mostly clear Thursday night.
  • highs near 82 lows 53-55.
  • Partly cloudy and a bit cooler Friday, partly cloudy Friday night,
  • Mostly cloudy and a bit cooler with a slight (20%) chance of thunderstorms Saturday afternoon, partly cloudy in the evening, mostly cloudy late at night,
  • Mostly cloudy and a bit cooler with a slight (20%) chance of showers Sunday, a slight (20%) chance of showers Sunday night.
  • Then mostly cloudy and a bit warmer with a slight (20%) chance of showers Monday (Independence Day).
  • highs 80-70 warming to 73 Monday lows near 56. (Seasonal Averages high 80 low 54).

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

  • Mostly cloudy with patchy AM fog and a slight (20%) chance of rain, partly cloudy a bit warmer this afternoon, mostly cloudy late tonight and Wednesday AM, sunny and a bit warmer in the afternoon, mostly clear in the evening,  partly cloudy late Wednesday night,
  • Partly cloudy and a bit warmer Thursday, then partly cloudy Thursday night.
  • highs 66-68 lows near 52.
  • Mostly cloudy and a bit cooler Friday, mostly cloudy Friday night,
  • Mostly cloudy and a bit cooler Saturday, a slight (20%) chance of showers late at night,
  • Mostly cloudy with a slight (20%) chance of showers Sunday and Sunday night,
  • Then mostly cloudy and a bit warmer with a slight (20%) chance of showers Monday (Independence Day).
  • highs 67-65 warming back to 67 Monday lows near 52 (Seasonal Averages high 64 low 52)

Forecast for the Northern Oregon Cascades including Willamette Pass:

  • Mostly sunny and much cooler today, mostly clear tonight,
  • Mostly sunny Wednesday, mostly clear Wednesday night,
  • Sunny and a bit warmer Thursday, then clear Thursday night,
  • free air freezing level 13,000 ft. today, 12,000 ft. tonight through Thursday, then 13,000 ft. Thursday night.
  • highs 67-70 lows 42-45.
  • Mostly sunny and a bit warmer Friday, mostly clear Friday night,
  • Partly cloudy and a bit cooler with a slight (20%) chance of showers Saturday afternoon, becoming mostly cloudy with a slight (20%) chance of showers at night,
  • A mix of clouds and sun and a bit cooler with a (30%) chance of showers Sunday, mostly cloudy with a slight (20%) chance of showers Sunday night,
  • Then partly cloudy and a bit cooler with a (30%) chance of showers Monday (Independence Day).
  • free air freezing level 13,000 ft. Friday, 14,000 ft. Friday night, then snow level above 8,000 ft. Saturday through Monday.
  • highs 72-57  lows 47-43.