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March 16, 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

  • A FROST ADVISORY IS IN EFFECT FROM 2 AM UNTIL 10 AM TODAY FOR THE SOUTH CENTRAL OREGON COAST AND THE CURRY COUNTY COAST.

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 High Pressure Ridge (“Arch” shape) offshore will be approaching the Pacific Northwest giving us dry with warmer daytime highs. The graphics for days 1-3 show no frontal activity through the period. The graphics for days 3-7 show an increase in complex frontal systems moving our way Sunday through next Thursday bringing back the rain chances.

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Forecast for the South Willamette Valley including Eugene-Springfield:

  • Some AM clouds with areas of frost, a mix of clouds and sun and a bit warmer this afternoon, mostly clear tonight,
  • Mostly sunny start, a mix of clouds and sun and a bit warmer Friday, becoming mostly cloudy with a slight (20%) chance of rain at night,
  • A mix of clouds and sun and a bit warmer with a slight (20%) chance of rain Saturday, a slight (20%) chance of evening rain, then a good (50%) chance of rain Saturday night.
  • highs 57-62 lows 32-42.
  • Mostly cloudy and cooler with rain likely (70%) Sunday, a good (50%) chance of rain Sunday night,
  • Mostly cloudy with a good (50%) chance of rain Monday and at night,
  • Mostly cloudy with a good (50%) chance of AM rain, rain likely (70%) and a bit cooler Tuesday afternoon and evening, a good (50%) chance of rain Tuesday night and Wednesday AM, then rain likely (70%) Wednesday afternoon.
  • highs 52-50 lows 39-35. (seasonal averages high 57 low 37)

Forecast for the Umpqua Valley including Roseburg:

  • Sunny and warmer today, clear tonight,
  • Partly cloudy start, mostly cloudy and a bit cooler Friday afternoon, a slight (20%) chance of showers with patchy fog late at night,
  • Mostly cloudy and a bit warmer with a slight (20%) chance of showers Saturday, then a good (50%) chance of showers late Saturday night.
  • highs 60-58 warming back to 60 Saturday lows 34-43.
  • Mostly cloudy and a bit cooler with showers likely (70%) Sunday, a good (50%) chance of showers Sunday night,
  • Mostly cloudy with a good (50%) chance of AM rain and snow showers, a (40%) chance of showers Monday afternoon, a good (50%) chance of evening showers, rain and snow showers likely (70%) late at night and Tuesday AM, showers and a bit cooler Tuesday afternoon, rain and snow showers likely (70%) Tuesday night,
  • Then mostly cloudy and a bit cooler with rain and snow showers likely (70%) Wednesday.
  • highs 55-52 lows 42-39. (seasonal averages high 59 low 40)

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

  • Areas of AM frost, sunny and a bit warmer this afternoon, clear tonight,
  • Mostly cloudy with patchy AM coastal fog and frost while inland areas of AM frost and patchy fog, just mostly cloudy and a bit cooler Friday afternoon, mostly cloudy with a slight (20%) chance of showers Friday night with patchy inland fog late,
  • Patchy AM fog, mostly cloudy with a slight (20%) chance of showers and a bit warmer Saturday afternoon, a good (50%) chance of evening showers, then showers likely (70%) late Saturday night.
  • highs 58-55 warming to 57 Saturday lows 34-42.
  • Mostly cloudy and a bit cooler with showers likely (70%) Sunday, a good (50%) chance of showers Sunday night,
  • Mostly cloudy with a good (50%) chance of showers Monday and in the evening, showers likely (70%) Monday night,
  • Mostly cloudy with AM showers likely (70%), showers and a bit cooler Tuesday afternoon, then showers likely (70%) Tuesday night and Wednesday.
  • highs 52-50 lows 38-36. (seasonal averages high 55 low 42)

Forecast for the Northern Oregon Cascades including Willamette Pass:

  • Mostly sunny and a bit warmer today, mostly clear tonight,
  • Mostly sunny start, a mix of clouds and sun and a bit warmer Friday afternoon, partly cloudy with a slight (20%) chance of rain and snow at night,
  • Clouds and sun with a slight (20%) chance of AM rain and snow, a slight (20%) chance of rain and a (40%) chance of snow Saturday afternoon, then mostly cloudy with a good (50%) chance of rain and snow Saturday night.
  • free air freezing level 4,000 ft. rising to 6,500 ft. falling to 5,500 ft. this afternoon, 6,500 ft. falling to 5,500 ft. late tonight, 5,000 ft. rising to 6,500 ft. Friday afternoon, snow level 4,500 ft. Friday night, 4,000 ft. Saturday, then 4,500 ft. Saturday night.
  • highs 40-43 lows 20-28.
  • Mostly cloudy and a bit cooler with rain and snow Sunday, evening snow and rain likely (70%), a good (50%) chance of snow and rain late Sunday night and Monday AM, a bit cooler with snow and rain Monday afternoon, evening rain and snow likely (70%), rain likely (70%) with a good (50%) chance of snow late at night,
  • Mostly cloudy with snow and rain Tuesday and in the evening, snow likely (70%) late Tuesday night and Wednesday AM, then snow and rain and a bit cooler Wednesday afternoon.
  • snow level 4,000 ft. Sunday, 3,500 ft. Sunday night, 3,000 ft. Monday, 3,500 ft. Monday night and Tuesday, then 3,000 ft. Tuesday night and Wednesday.
  • highs 38-32 lows 26-22.

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  • For all of your Eugene-Springfield and Lane County News, Weather, and Sports go to: EugeneDailyNews.com

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10/31 Showers with patchy fog overnight.

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_____

  • For all of your Eugene-Springfield and Lane County News, Weather, and Sports go to: EugeneDailyNews.com

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Mostly clear again tonight, then sunshine and slightly cooler for your Friday.

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

  • Becoming mostly cloudy late tonight,
  • Some AM clouds, sunny and a bit warmer Friday afternoon, clear in the evening, partly cloudy late Friday night,
  • Mostly cloudy start, partly cloudy and slightly cooler Saturday afternoon, mostly clear at night,
  • Mostly sunny Sunday, then mostly clear Sunday night.
  • lows 54-56 cooling back to 54 Sunday night highs 70-69.
  • Mostly sunny and a bit warmer Monday, mostly clear Monday night,
  • Partly cloudy and slightly cooler Tuesday, partly cloudy at night,
  • Then partly cloudy Wednesday through Thursday.
  • highs 73-72 lows 54-56 cooling back to 54 Wednesday night. (Seasonal Averages high 66 low 54)

Forecast for the Northern Oregon Cascades including Willamette Pass:

  • Mostly clear tonight,
  • Mostly sunny and a bit cooler Friday, clear Friday night,
  • Sunny and a bit warmer Saturday, mostly clear at night,
  • Some AM clouds, mostly sunny and a bit cooler Sunday, then clear Sunday night.
  • free air freezing level 15,000 ft. falling to 14,000 ft. late tonight, 14,000 ft. rising to 15,000 ft. Friday afternoon, 15,000 ft. Friday night through Sunday, then 16,000 ft. Sunday night.
  • lows 49-47 highs 74-72 warming back to 74 Sunday.
  • Sunny and a bit warmer Monday, clear Monday night,
  • Sunny Tuesday, mostly clear at night,
  • Then mostly sunny and a bit cooler Wednesday and Thursday, mostly clear Wednesday night.
  • free air freezing level 16,000 ft. Monday through Thursday.
  • highs 80-75 lows 53-50.