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February 12, 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 FROM 10 PM TUESDAY UNTIL 10 PM WEDNESDAY FOR THE SOUTH CENTRAL OREGON CASCADES, THE SISKIYOU MOUNTAINS , AND THE SOUTHERN OREGON CASCADES.
  • A WINTER WEATHER ADVISORY IS IN EFFECT FROM 10 PM TUESDAY UNTIL 10 PM WEDNESDAY FOR THE KLAMATH BASIN, NORTHERN AND EASTERN KLAMATH COUNTY, AND WESTERN, CENTRAL, AND EASTERN LAKE COUNTY.
  • A WINTER STORM WATCH IS IN EFFECT FROM EARLY WEDNESDAY MORNING, THROUGH THURSDAY EVENING FOR THE WESTERN COLUMBIA RIVER GORGE.
  • A WINTER STORM WATCH IS IN EFFECT FOR FROM EARLY WEDNESDAY MORNING THROUGH THURSDAY EVENING FOR THE UPPER HOOD RIVER VALLEY.
  • A WINTER STORM WATCH IS IN EFFECT FROM EARLY WEDNESDAY MORNING THROUGH THURSDAY EVENING ABOVE 2,500 FT. FOR THE NORTHERN OREGON CASCADES.
  • A WINTER STORM WATCH IS IN EFFECT FROM EARLY WEDNESDAY MORNING THROUGH THURSDAY EVENING ABOVE 3,500 FT. FOR THE CASCADES IN LANE COUNTY.
  • A WINTER STORM WATCH IS IN EFFECT FROM LATE TUESDAY NIGHT THROUGH THURSDAY EVENING FOR THE EAST SLOPES OF THE OREGON CASCADES.

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 will help clear out the rain for a short while. The graphics for days 1-3  show a new frontal system will move through Oregon Wednesday bringing rain for Valentine’s Day. The graphics for days 3-7   Thursday through Monday show active weather with complex frontal systems  approaching the Pacific Northwest.

Forecast For The South Willamette Valley Including Eugene-Springfield:

  • Partly cloudy with patchy fog tonight, patchy frost late tonight,
  • Some AM clouds with areas of frost and patchy fog, a mix of clouds and sun and a bit cooler Tuesday afternoon, partly cloudy with a slight (20%) chance of evening rain, mostly cloudy with a slight (20%) chance of rain with patchy fog Tuesday night (0.10 in. of rain possible),
  • Mostly cloudy with patchy AM fog, rain (0.25 in. of rain possible) Wednesday (Valentine’s Day), rain at night (0.50 in. of rain possible),
  • Mostly cloudy and a bit cooler with rain Thursday, then a good (50%) chance of rain Thursday night.
  • lows 34-42 cooling to 40 Thursday night highs 50-48.
  • Mostly cloudy and a bit warmer with a good (50%) chance of rain and snow Friday, rain and snow likely (70%) Friday night,
  • Mostly cloudy and a bit warmer with rain likely (70%) Saturday, rain likely (70%)  at night,
  • Mostly cloudy and a bit warmer with a good (50%) chance of rain Sunday and Sunday night,
  • Then mostly cloudy with a good (50%) chance of rain Monday (President’s Day).
  • highs 52-54 lows 42-40 (seasonal averages high 51 low 35)

Forecast for the Umpqua Valley including Roseburg:

  • Mostly cloudy patchy fog tonight,
  • Mostly cloudy with patchy AM fog, partly cloudy and a bit cooler with a slight (20%) chance of rain Tuesday, mostly cloudy with a (40%) chance of rain Tuesday night (0.10 in. of rain possible),
  • Mostly cloudy and a bit cooler with rain (0.25 in. of rain possible) Wednesday (Valentine’s Day), rain at night (0.25 in. of rain possible),
  • Mostly cloudy  AM rain, a bit warmer with rain likely (70%) Thursday afternoon, then a (30%) chance of rain Thursday night.
  • lows 38-43-43 highs near 53.
  • Mostly cloudy with a slight (20%) chance of rain and a bit warmer Friday, a good (50%) chance of evening rain, rain late likely (70%)  Friday night,
  • Mostly cloudy and a bit warmer with rain Saturday, evening rain likely (70%), a good (50%) chance of rain late at night,
  • Mostly cloudy and a bit warmer with a (40%) chance of rain Sunday and in the evening, rain likely (70%) Sunday night,
  • Then mostly cloudy with rain likely (70%) Monday (President’s Day).
  • highs 58-56 lows 46-43 (seasonal averages high 53 low 37).

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

  • Mostly cloudy with patchy fog tonight,
  • Mostly cloudy and a bit warmer with a slight (20%) chance of coastal rain Tuesday afternoon while mostly cloudy with a slight (20%) chance of inland rain Tuesday afternoon, a good (50%) chance of coastal rain at night while a slight (20%) of evening inland rain and inland rain late Tuesday night (0.25 in. of rain possible),
  • Mostly cloudy with rain (0.75 in. of rain possible) Wednesday (Valentine’s Day) and Wednesday night (0.50 in. of rain possible),
  • Mostly cloudy with rain likely (70%) and a bit warmer Thursday, then a (30%) chance of rain Thursday night.
  • lows 38-45 highs near 56.
  • Mostly cloudy with a good (50%) chance of rain and a bit warmer Friday, cloudy with rain Friday night,
  • Mostly cloudy and a bit cooler with rain Saturday, evening rain likely (70%), a good (50%) chance of rain late at night,
  • Mostly cloudy with a (40%) chance of rain Sunday, rain likely (70%) Sunday night,
  • Then mostly cloudy and a bit cooler with rain likely (70%) Monday (President’s Day).
  • highs 62-57 lows 47-44. (seasonal averages high 54 low 41).

Forecast for the Northern Oregon Cascades including Willamette Pass:

  • Mostly cloudy tonight,
  • Partly cloudy and a bit cooler Tuesday with a slight (20%) chance of afternoon rain, partly cloudy with a (30%) chance of evening rain and a slight (20%) chance of snow, mostly cloudy with a good (50%) chance of rain and snow late Tuesday night,
  • Mostly cloudy with AM rain and snow likely (70%), rain and snow and a bit cooler Wednesday afternoon (Valentine’s Day), mostly cloudy with rain and snow Wednesday night (snow possibly heavy at times late),
  • Mostly cloudy with snow and rain and a bit cooler Thursday, then mostly cloudy with a good (50%) chance of rain and snow Thursday night.
  • free air freezing level 5,500 ft. falling to 4,000 ft. late tonight, snow level 3,500 ft. Tuesday, 4,500 ft. Tuesday night and Wednesday, 3,500 ft. Wednesday night, then 4,000 ft. Thursday and Thursday night.
  • lows 23-30 highs 39-34.
  • Mostly cloudy and a bit warmer with a good (50%) chance of rain and snow Friday, rain and snow likely (70%) Friday night,
  • Mostly cloudy with with rain and snow Saturday, rain and snow likely (70%) at night,
  • Mostly cloudy with rain and snow likely (70%) Sunday, snow likely (70%) with a good (50%) chance of rain Sunday night,
  • Then mostly cloudy with rain and snow likely (70%) Monday (President’s Day).
  • snow level 4,500 ft. Friday, 5,000 ft. Friday night and  Saturday, 4,500 ft. Saturday night and Sunday, 5,000 ft. Sunday night, then 4,500 ft. Monday.
  • highs near 39 lows 32-29.