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Tim Chuey

by | Feb 19, 2024 | Weather

February 20, 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 DENSE FOG ADVISORY IS IN EFFECT UNTIL NOON TODAY FOR THE FOOTHILLS OF THE NORTHERN BLUE MOUNTAINS OF OREGON.
  • A DENSE FOG ADVISORY IS IN EFFECT UNTIL NOON TODAY FOR THE FOOTHILLS OF THE SOUTHERN BLUE MOUNTAINS, NORTH CENTRAL OREGON, AND CENTRAL OREGON.

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:

  • The Upper Level High Pressure Ridge (“Arch” shape) has moved to the east and will be followed by an Upper Level Low Pressure Trough (“U” shape). The graphics for days 1-3  show low pressure off the California coast that’s moving northward along the Oregon coast while dragging a cold front behind it. The graphics for days 3-7    Friday through Tuesday show active weather with complex frontal systems active over the Pacific Ocean moving toward the Pacific Northwest.

Forecast For The South Willamette Valley Including Eugene-Springfield:

  • Mostly cloudy with a slight (20%) chance of AM showers, a bit warmer with a good (50%) chance of showers with a slight (20%) chance of thunderstorms this afternoon (0.10 in. of rain possible, more in storms) evening showers likely (70%) with a slight (20%) chance of thunderstorms, and showers late tonight (0.10 in. of rain possible, more in storms),
  • Mostly cloudy and a bit cooler with showers Wednesday (0.10 in. of rain possible, more in storms), a (40%) chance of evening showers, just partly cloudy late at night (under 0.10 in. of rain possible, more in storms),
  • A mix of clouds and sun and a bit warmer Thursday, then partly cloudy Thursday night.
  • highs 58-54 warming to 56 Thursday lows 43-39 warming to 42 Thursday night.
  • Partly cloudy Friday and Friday night,
  • Some AM clouds, sunny and a bit warmer Saturday afternoon, partly cloudy at night,
  • Mostly cloudy and a bit cooler with rain likely (70%) Sunday, showers Sunday  night,
  • Then mostly cloudy and a bit cooler with showers Monday.
  • highs 56-58 cooling to 46 Monday lows near 38. (seasonal averages high 52 low 35)

Forecast for the Umpqua Valley including Roseburg:

  • Mostly cloudy with a (30%) chance of rain today, a good (50%) chance of evening rain, rain likely (70%) late tonight (under 0.10 in. of rain possible),
  • Mostly cloudy with rain a bit cooler Wednesday (0.10 in. of rain possible), a (30%) chance of evening rain, just partly cloudy late at night (under 0.10 in. of rain possible),
  • Patchy AM fog, mostly cloudy and a bit warmer with a slight (20%) chance of showers Thursday afternoon, then a slight (20%) chance of showers  Thursday night.
  • highs 58-55 warming to 59 Thursday lows 45-40 warming to 43 Thursday night.
  • Mostly cloudy with a slight (20%) chance of AM showers, just mostly cloudy and a bit warmer Friday afternoon, mostly cloudy with patchy fog Friday night,
  • Some AM clouds with patchy fog, sunny Saturday afternoon, partly cloudy with a slight (20%) chance of rain late at night,
  • Mostly cloudy and a bit cooler with a good (50%) chance of rain Sunday, evening rain, rain and snow late Sunday night,
  • Then mostly cloudy and a bit cooler rain and snow Monday.
  • highs 60-47 lows 42-39 (seasonal average high 55 low 38)

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

  • Mostly cloudy with a good (50%) chance of AM coastal rain and coastal rain likely (70%) a bit warmer with a slight (20%) chance of coastal rain thunderstorms while mostly cloudy and a bit warmer with a (40%) chance of inland rain today (0.25 in. of rain possible) and breezy (Wind: S 15-25 mph), coastal showers with a slight (20%) chance of thunderstorms late at night while inland evening rain likely (70%) with inland rain late tonight (0.25 in. of rain possible) and breezy (Wind: S 15-25 mph decreasing to S 10-15 mph late at night),
  • Mostly cloudy with AM coastal rain likely (70%) with a slight (20%) chance of thunderstorms and coastal rain likely (70%) in the afternoon while inland AM rain and a good (50%) chance of rain Wednesday afternoon (0.10 in. of rain possible), a (30%) chance of evening coastal rain while a (40%) chance of inland evening rain and just partly cloudy inland at night while mostly cloudy at the shore Wednesday night (under 0.10 in. of rain possible),,
  • Patchy AM fog, mostly cloudy and a bit warmer with a slight (20%) chance of showers Thursday afternoon, mostly cloudy with a (%) chance of showers Thursday night.
  • highs 57-60 lows 46-42 warming to 44 Thursday night.
  • Mostly cloudy with a slight (20%) chance of AM showers, mostly cloudy and a bit cooler Friday afternoon, mostly cloudy with patchy fog Friday night,
  • Some AM clouds with patchy fog, sunny Saturday, partly cloudy in the evening, mostly cloudy with a slight (20%) chance of rain Saturday night,
  • Mostly cloudy and a bit cooler with a (40%) chance of rain Sunday, rain Sunday night,
  • Then mostly cloudy and a bit cooler with rain Monday.
  • highs 59-50 lows 43-40. (seasonal averages high 54 low 41).

Forecast for the Northern Oregon Cascades including Willamette Pass:

  • A mix of clouds and sun with a good (50%) chance of rain and snow showers and a bit warmer today (under 0.10 in. of rain possible), mostly cloudy with a good (50%) chance of rain and snow showers today night (under 0.10 in. of rain possible, 1 in. of snow possible),
  • Mostly cloudy and a bit cooler with rain and snow showers Wednesday, a good (50%) chance of evening rain and snow showers, just partly cloudy at night,
  • Partly cloudy and a bit warmer Thursday, then partly cloudy Thursday night.
  • snow level 4,500 ft. today and tonight, 4,000 ft. Wednesday and Wednesday night, free air freezing level 5,500 ft. Thursday, then 6,500 ft. Thursday night.
  • highs 42-38 warming back to 42 Thursday lows 30-26 warming to 28 Thursday night.
  • Partly cloudy and a bit warmer with a slight (20%) chance of showers Friday, just partly cloudy Friday night,
  • Mostly sunny and a bit warmer Saturday, partly cloudy at night,
  • Mostly cloudy with rain and snow likely (70%) and a bit cooler Sunday, snow and rain showers Sunday night (snow possibly heavy at times),
  • Then mostly cloudy and colder with snow showers Monday (snow possibly heavy at times).
  • snow level 5,000 ft. Friday, free air freezing level 7,500 ft. Friday night through Saturday night, snow level 4,500 ft. Sunday, 3,000 ft. Sunday night, then 1,500 ft. Monday.
  • highs 44-47 cooling to 29 Monday lows 28-24.