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June 11, 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 HEALTH ADVISORY REMAINS IN EFFECT FOR THE SOUTH UMPQUA RIVER BAR. POOLS IN THE BEDROCK ALONG THE RIVERS EDGE ARE KNOWN TO DEVELOP BLUE-GREEN ALGAE (CYANOBACTERIAL) BLOOMS THAT CAN BE HARMFUL TO PETS AND PEOPLE IF ACCIDENTAL INGESTION OCCURS. SIGNS HAVE BEEN POSTED ALONG SEVERAL ACCESS AREAS ALONG THE  RIVER.

THE WEATHER PATTERN

June 11, 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 HEALTH ADVISORY REMAINS IN EFFECT FOR THE SOUTH UMPQUA RIVER BAR. POOLS IN THE BEDROCK ALONG THE RIVERS EDGE ARE KNOWN TO DEVELOP BLUE-GREEN ALGAE (CYANOBACTERIAL) BLOOMS THAT CAN BE HARMFUL TO PETS AND PEOPLE IF ACCIDENTAL INGESTION OCCURS. SIGNS HAVE BEEN POSTED ALONG SEVERAL ACCESS AREAS ALONG THE  RIVER.

THE WEATHER PATTERN

An Upper Level High Pressure Ridge (“Arch” shape)  will keep temperatures near or a bit above normal. The graphics for days 1-3  show no frontal systems approaching the Pacific Northwest. The graphics for days 3-7   Tuesday through Saturday show a frontal system moving through the Pacific Northwest Tuesday and Tuesday night, then a cold front will be moving through Oregon next Saturday.

Forecast For The South Willamette Valley Including Eugene-Springfield:

  • Some AM clouds, sunny and a bit warmer this afternoon, clear tonight,
  • Mostly sunny and a bit warmer Monday, mostly clear at night,
  • A mix of clouds and sun and a bit cooler Tuesday, then mostly clear Tuesday night.
  • highs 83-87 cooling to 77 Tuesday low 49-52 cooling to 46 Tuesday night .
  • Partly cloudy and a bit cooler Wednesday, mostly clear Wednesday night,
  • Some AM clouds, mostly sunny and a bit warmer Thursday afternoon, mostly clear at night,
  • Partly cloudy and a bit warmer Friday afternoon, partly cloudy with a slight (20%) chance of showers Friday night,
  • Then a mix of clouds and sun and a bit cooler with a slight (20%) chance of showers Saturday.
  • highs 74-78 cooling to 74 Saturday lows 44-52.  (seasonal averages high 73 low 47)

Forecast for the Umpqua Valley including Roseburg:

  • Some AM clouds, sunny and a bit warmer this afternoon, mostly clear tonight,
  • Sunny and a bit warmer Monday, mostly clear at night,
  • AM clouds, sunny and a bit cooler Tuesday, mostly clear in the evening, then partly cloudy Tuesday night,
  • highs 84-86 cooling to 80 Tuesday lows 56-52.
  • Some AM clouds, sunny Wednesday afternoon, clear Wednesday night,
  • Mostly sunny and a bit warmer Thursday, mostly clear at night,
  • Then partly cloudy and a bit warmer Friday and Friday night,
  • Then partly cloudy and a bit cooler Saturday.
  • highs 78-84 cooling to 79 Saturday  lows 56-50. (seasonal averages high 75 low 52)

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

  • Mostly cloudy with patchy coastal fog while areas of inland fog this AM, sunny this afternoon, partly cloudy this evening, mostly cloudy late tonight,
  • Partly cloudy with patchy AM coastal fog while areas of inland AM fog, sunny Monday afternoon, mostly clear in the evening, partly cloudy late Monday night,
  • Mostly cloudy and a bit cooler Tuesday, then partly cloudy Tuesday night.
  • highs 67-65 lows 50-48.
  • Partly cloudy Wednesday, mostly clear Wednesday night,
  • Mostly sunny and a bit warmer, mostly clear at night,
  • Partly cloudy and a bit warmer Friday, mostly cloudy Friday night,
  • Then mostly cloudy and a bit cooler Saturday.
  • highs 65-68 cooling to 66 Saturday lows 46-50. (seasonal averages high 63 low 51)

Forecast for the Northern Oregon Cascades including Willamette Pass:

  • Mostly sunny and a bit warmer today, mostly clear tonight,
  • Mostly sunny start, partly cloudy and a bit warmer Monday afternoon, a slight (20%) chance of evening showers,  just partly cloudy late at night,
  • Some AM clouds, mostly sunny and a bit cooler Tuesday afternoon, then partly cloudy Tuesday night.
  • free air freezing level 12,000 ft. today, 13,000 ft. tonight and Monday, 14,000 ft. Monday night through Tuesday night.
  • highs 73-76 cooling to 68 Monday lows 42-47 cooling to 38 Tuesday night.
  • Partly cloudy and a bit cooler Wednesday, mostly clear Wednesday night,
  • Mostly sunny and a bit warmer Thursday, mostly clear at night,
  • Partly cloudy and a bit warmer Friday, partly cloudy with a slight (20%) chance of showers Friday night,
  • Partly cloudy with a slight (20%) chance of AM showers, then a (30%) chance of showers and a bit cooler Saturday.
  •  free air freezing level 12,000 ft. Wednesday and Wednesday night, 13,000 ft. Thursday,  14,000 ft. Thursday night , 13,000 ft. Friday, then snow level above 8,000 ft. Friday nigh