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February 7, 2024

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 WINTER WEATHER ADVISORY IS IN EFFECT UNTIL 10 AM THURSDAY FOR WALLOWA COUNTY.

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 Atmospheric River guided by an Upper Level Low pressure Trough has been pumping a lot of moisture into California, but luckily not as much into Oregon.  The graphics for days 1-3  show no frontal systems moving into Oregon. The graphics for days 3-7   Friday through Tuesday show complex frontal systems  approaching the Pacific Northwest the pushing through Friday and next Sunday and Monday.

Forecast For The South Willamette Valley Including Eugene-Springfield:

  • Mostly cloudy with a good (50%) chance of showers tonight (under o.10 in. of rain possible),
  • A mix of clouds and sun with a good (50%) chance of showers and a bit cooler Thursday (under 0.10 in. of rain possible), a good (50%) chance of evening showers, showers likely (70%) late Thursday night (under o.10 in. of rain possible),
  • Mostly cloudy with AM showers likely (70%), a good (50%) chance of showers and a bit cooler Friday afternoon (under o.10 in. of rain possible), a slight (20%) chance of evening showers, just mostly cloudy late at night (under 0.10 in. of rain possible),
  • A mix of clouds and sun and a bit warmer Saturday, a slight (20%) chance of evening rain, then a (40%) chance of rain Saturday night.
  • lows near 37 highs 48-46 warming to 52 Saturday.
  • Clouds and sun with a (40%) chance of rain Sunday, mostly cloudy with a (40%) chance of rain Sunday night,
  • Mostly cloudy and a bit warmer with a (40%) chance of rain Monday, a (40%) chance of rain at night,
  • Mostly cloudy with a (40%) chance of AM rain, a slight (20%) chance of rain Tuesday afternoon, a slight (20%) chance of rain Tuesday night,
  • Then mostly cloudy and a bit warmer with a slight (20%) chance of rain Wednesday.
  • highs 52-57 lows 40. (seasonal averages high 50 low 35)

Forecast for the Umpqua Valley including Roseburg:

  • Mostly cloudy with a (40%) chance of rain and snow showers, patchy fog late tonight (under o.10 in. of rain possible, snow level 3,000 ft. falling to 2,500 ft. late at night),
  • Patchy AM fog, mostly cloudy and a bit cooler with a (30%) chance of rain and snow showers Thursday (under 0.10 in. of rain possible, snow level 2,500 ft.), a slight (20%) chance of rain and snow showers Thursday night with patchy fog late (under 0.10 in. of rain possible, evening snow level 2,500 ft.),
  • Mostly cloudy with AM fog, a good (50%) chance of rain and snow showers Friday afternoon (snow level 1,500 ft. rising to 3,000 ft.), a slight (20%) chance of evening showers, just mostly cloudy late at night,
  • Mostly cloudy start, partly cloudy and a bit warmer Saturday afternoon, then mostly cloudy with a slight (20%) chance of showers late Saturday night.
  • lows 36-38 cooling back to 36 Saturday night highs 47-54.
  • Mostly cloudy with a slight (20%) chance of showers Sunday and Sunday night,
  • Mostly cloudy with a (30%) chance of showers Monday and at night,
  • Mostly cloudy and a bit warmer with a slight (20%) chance of showers Tuesday, a slight (20%) chance of showers Tuesday night,
  • Then mostly cloudy and a bit warmer with a slight (20%) chance of showers Wednesday.
  • highs 54-58 lows 42-44 (seasonal averages high 53 low 37).

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

  • Mostly cloudy at the shore tonight, mostly cloudy with a good (50%) chance of evening inland showers, patchy fog with inland showers late tonight (o.10 in. of rain possible),
  • Mostly cloudy with a (30%) chance of AM coastal showers while patchy AM inland fog with a (40%) chance of inland showers Thursday afternoon (o.10 in. of rain possible), a slight (20%) chance of coastal showers late at night while a slight (20%) chance of inland showers with patchy inland fog late Thursday night,
  • Patchy AM fog, mostly cloudy with a (30%) chance of showers Friday (AM snow level 2,000 ft.), a slight (20%) chance of evening showers, just mostly cloudy at night,
  • Partly cloudy and a bit warmer Saturday, then  mostly cloudy with a slight (20%) chance of showers late Saturday night.
  • lows 39-42 highs 52-57.
  • Mostly cloudy with a slight (20%) chance of showers and a bit cooler Sunday, a (30%) chance of showers Sunday night,
  • Mostly cloudy and a bit warmer with a (30%) chance of showers Monday and at night,
  • Mostly cloudy and a bit warmer with a (20%) chance of showers Tuesday, a slight (20%) chance of showers Tuesday night,
  • Then mostly cloudy and a bit warmer with a slight (20%) chance of showers Wednesday.
  • highs near 56-59 lows 43-45. (seasonal averages high 54 low 41).

Forecast for the Northern Oregon Cascades including Willamette Pass:

  • Mostly cloudy with snow showers and rain showers likely (70%) with a slight (20%) chance of drizzle (0.10 in. of rain possible, 2 in. of snow possible),
  • Mostly cloudy with AM snow showers and a slight (20%) chance of drizzle with rain showers likely (70%),  a good (50%) chance of snow and rain showers and a bit cooler Thursday afternoon, a good (50%) chance of evening snow and rain showers, snow showers likely (70%) late Thursday night,
  • Mostly cloudy with snow showers and rain showers likely (70%) Friday afternoon, a (40%) chance of evening snow and rain showers, a slight (20%) chance snow showers late at night,
  • Partly cloudy and a bit warmer Saturday, partly cloudy with  slight (20%) chance of evening rain, then a (30%) chance of rain and snow late Saturday night.
  • snow level 3,000 ft. tonight, 2,500 ft. Thursday, 2,000 ft. Thursday night, 2,000 ft. rising to 3,000 ft. Friday afternoon, 3,000 ft. Friday night, free air freezing level then 4,500 ft. Saturday and Saturday night.
  • lows 24-22 warming back to 24 Saturday night highs 30-38.
  • A mix of clouds and sun and a bit warmer with a (40%) chance of rain and snow Sunday, mostly cloudy with a (40%) chance of rain and snow Sunday night,
  • A mix of clouds and sun and a bit cooler with a (40%) chance of rain and snow Monday, mostly cloudy with a (40%) chance of rain and snow at night,
  • A mix of clouds and sun with a (40%) chance of rain and snow Tuesday, mostly cloudy with a slight (20%) chance of evening rain and snow, partly cloudy with a (30%) chance of rain and snow late Tuesday night,
  • Then a mix of clouds and sun and a bit warmer with a (30%) chance of rain and snow Wednesday.
  • snow level 4,500 ft. Sunday, 5,000 ft. Sunday night, 5,500 ft. Monday, 4,500 ft. Monday night, 4,000 ft. Tuesday, then 4,500 ft. Wednesday.
  • highs 40-39 warming to 42 Wednesday lows near 28.