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June 13, 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

  • A FLOOD WATCH IS IN EFFECT UNTIL TUESDAY EVENING FOR THE GRANDE RONDE RIVER AT TROY.
  • A FREEZE WATCH IS IN EFFECT FROM LATE TONIGHT THROUGH TUESDAY MORNING FOR THE KLAMATH BASIN.
  • A FREEZE WARNING IS IN EFFECT FROM 2 AM UNTIL 9 AM TODAY FOR THE KLAMATH BASIN, NORTHERN AND EASTERN KLAMATH COUNTY, AND WESTERN, CENTRAL AND EASTERN LAKE COUNTY.
  • A FREEZE WATCH IS IN EFFECT THROUGH TUESDAY MORNING FOR NORTHERN AND EASTERN KLAMATH COUNTY, AND WESTERN, CENTRAL AND EASTERN LAKE COUNTY.
  • 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 Jet Stream Airflow continues sending an Atmospheric River of moisture our way. The graphics for days 1-3 show the complex frontal system that came through Oregon Saturday. The graphics for days 3-7   Thursday through Monday show the next  frontal system will be sliding through the Pacific Northwest Thursday and next Friday.

Forecast for the South Willamette Valley including Eugene-Springfield:

  • Mostly cloudy with a good (50%) chance of showers and a bit warmer today (0.10 in. of rain possible), partly cloudy with a good (50%) chance of evening showers, mostly cloudy with a slight (20%) chance of showers late tonight,
  • Clouds and sun with a slight (20%) chance of AM showers, a mix of clouds and sun and a bit warmer Tuesday afternoon, mostly clear at night,
  • Partly cloudy and a bit warmer Wednesday, then partly cloudy Wednesday night.
  • highs 63-74 lows 47-44 warming to 48 Tuesday night.
  • Clouds and sun with a slight (20%) chance of AM showers, a mix of clouds and sun and a bit cooler Thursday afternoon, partly cloudy with a slight (20%) chance of showers late Thursday night.
  • A mix of clouds and sun and a bit cooler with a (40%) chance of showers Friday, partly cloudy with a (30%) 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 (40%) chance of showers Saturday, partly cloudy with a slight (20%) chance of showers Saturday night,
  • Then partly cloudy and a bit warmer with a slight (20%) chance of showers Sunday.
  • highs 72-68 warming back to 72 Sunday lows 50-48. (Seasonal Averages high 73 low 47)

Forecast for the Umpqua Valley including Roseburg:

  • Mostly cloudy with a (40%) chance of showers and a bit warmer today (under 0.10 in. of rain possible), partly cloudy with a slight (20%) chance of showers tonight,
  • Partly cloudy and a bit warmer Tuesday, mostly clear at night,
  • AM sun, partly cloudy and a bit warmer Wednesday, mostly clear in the evening, then party cloudy with a slight (20%) chance of showers late Wednesday night.
  • highs 64-78 lows 43-48.
  • Mostly cloudy and a bit cooler Thursday, partly cloudy with a slight (20%) chance of evening showers, mostly cloudy with a slight (20%) of showers Thursday night,
  • Mostly cloudy and a bit cooler with a (30%) chance of showers Friday, partly cloudy with a slight (20%) chance of showers at night,
  • Mostly cloudy and a bit cooler with a (30%) chance of showers Saturday, partly cloudy with a slight (20%) chance of showers Saturday night,
  • Then partly cloudy with a slight (20%) chance of showers Sunday.
  • highs 75-68 warming back to 75 Sunday lows 50-47. (Seasonal Averages high 76 low 52).

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

  • Mostly cloudy with patchy AM fog, partly cloudy with a (30%) chance of coastal showers and a bit warmer this afternoon while mostly cloudy with a (40%) chance of inland showers today (under 0.10 in. of rain possible), partly cloudy with a slight (20%) chance of evening coastal showers while mostly cloudy with a slight (20%) chance of inland showers tonight,
  • Some AM clouds, mostly sunny and a bit warmer Tuesday afternoon, mostly clear at night,
  • Partly cloudy and a bit warmer Wednesday, partly cloudy with a slight (20%) chance of evening showers, then mostly cloudy with a slight (20%) chance of showers late Wednesday night.
  • highs 64-68 lows 48-50.
  • Mostly cloudy with a slight (20%) chance of AM showers, partly cloudy and a bit cooler with a (30%) chance of showers Thursday afternoon, partly cloudy in the evening, mostly cloudy with a slight (20%) chance of showers late Thursday night,
  • Mostly cloudy with a (30%) chance of showers Friday, partly cloudy with a slight (20%) chance of evening showers, mostly cloudy with a slight (20%) chance of showers late at night,
  • Mostly cloudy with a slight (20%) chance of showers Saturday, partly cloudy with a slight (20%) chance of showers Saturday night,
  • Then partly cloudy and a bit warmer with a slight (20%) chance of showers Sunday.
  • highs 64-66 lows near 50. (Seasonal Averages high 63 low 51)

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Forecast for the Northern Oregon Cascades including Willamette Pass:

  • Mostly cloudy with AM rain and snow showers likely (70%), a good (50%) chance of early afternoon snow showers, showers and a bit warmer this afternoon (0.10 in. of rain possible, 2 in. of snow possible), mostly cloudy with a good (50%) chance of evening showers and snow showers, a slight (20%) chance of rain and showers late tonight,
  • Partly cloudy with a slight (20%) chance of AM rain and snow showers, partly cloudy and warmer Tuesday afternoon, mostly clear Tuesday night,
  • AM sun, partly cloudy and warmer Wednesday afternoon, then just partly cloudy Wednesday night.
  • snow level 4,500 ft. rising to 5,500 ft. this afternoon, 5,500 ft. falling to 5,000 ft. late tonight, 5,000 ft. Tuesday morning, free air freezing level 8,000 ft. rising to 10,000 ft. late Tuesday night, 12,000 ft. Wednesday, then 11,000 ft. Wednesday night.
  • highs 48-43 warming to 52 Tuesday lows near 33.
  • A mix of clouds and sun and a bit cooler Thursday, partly cloudy in the evening, mostly cloudy with a slight (20%) chance of showers late Thursday night,
  • A mix of clouds and sun and a bit cooler with good (50%) chance of showers Friday, mostly cloudy with a (40%) chance of evening showers, a slight (20%) chance of showers late at night,
  • Clouds and sun with a slight (20%) chance of AM showers, a mix of clouds and sun with a (40%) chance of showers Saturday afternoon, partly cloudy with a slight (20%) chance of evening showers, just partly cloudy late Saturday night,
  • Then partly cloudy and a bit warmer with a slight (20%) chance of showers Sunday.
  • free air freezing level 9,000 ft. Thursday and Thursday evening, snow level 8,000 ft. Thursday late Thursday night, 7,500 ft. falling to 7,000 ft. Friday afternoon, 7,000 ft. falling to 6,500 ft. late Friday night, 6,500 ft. rising to 7,000 ft. Saturday afternoon, 7,000 ft. Saturday evening, free air freezing level 9,000 ft. late Saturday night, then snow level 6,500 ft. rising to 7,500 ft. Sunday afternoon.
  • highs 64-55 lows 40-38.