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Tim Chuey Weather

by | Apr 21, 2023 | Weather

April 21, 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

  • NONE AT THIS TIME.

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 Low Pressure Trough (“U” shape) is sending frontal systems our way and still even more moisture. The graphics for days A complex frontal system, warm front first followed by a cold front moves in. The graphics for days 3-7  Monday through next Friday show the continuing series of complex frontal systems that will slide into the Pacific Northwest through the period.

Forecast For The South Willamette Valley Including Eugene-Springfield:

  • Mostly cloudy with occasional evening rain, rain chance ending with patchy fog developing late tonight (under 0.10 in. of rain possible),
  • Mostly cloudy with patchy AM fog and a slight (20%) chance of showers, just mostly cloudy and a bit warmer Saturday afternoon, a slight (20%) chance of evening rain, a good (50%) chance of rain with patchy fog late Saturday night (under 0.10 in. of rain possible),
  • Mostly cloudy with AM showers likely (70%), a bit cooler with a good (50%) chance of showers Sunday afternoon (under 0.10 in. of rain possible), showers likely (70%) late at night (under 0.10 in. of rain possible),
  • Mostly cloudy with a good (50%) chance of AM showers, a slight (20%) chance of showers and a bit cooler Monday afternoon, then partly cloudy with patchy frost late Monday night,
  • lows 46-49 cooling to 35 Monday night highs 66-58.
  • Partly cloudy with patchy AM frost, partly cloudy and a bit warmer Tuesday afternoon, partly cloudy Tuesday night,
  • Partly cloudy Wednesday and at night,
  • Partly cloudy start, mostly sunny Thursday afternoon, mostly clear Thursday night,
  • Then partly cloudy Friday.
  • highs 62-75 lows 440-47. (seasonal averages high 63 low 41)

Forecast for the Umpqua Valley including Roseburg:

  • Mostly cloudy with (30%) chance of evening showers (under 0.10 in. of rain possible), just mostly cloudy late tonight,
  • Mostly cloudy Saturday, mostly cloudy with a slight (20%) chance of showers late Saturday night (under 0.10 in. of rain possible),
  • Mostly cloudy and a bit cooler with a (30%) chance of showers Sunday (under 0.10 in. of rain possible) and Sunday night (under 0.10 in of rain possible, snow level 3,500 ft.),
  • Mostly cloudy with a slight (20%) chance of AM showers, just mostly cloudy and a bit cooler Monday afternoon, then partly cloudy at night.
  • lows 47-50 cooling to 40 Monday night highs 69-58.
  • Partly cloudy and a bit warmer Tuesday, mostly clear Tuesday night,
  • Mostly sunny and a bit warmer Wednesday and Thursday, mostly clear both nights,
  • Some AM clouds, then sunny and a bit warmer Friday afternoon.
  • highs 59-76 lows 42-47 (seasonal averages high 65 low 43)

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

  • Mostly cloudy with a slight (20%) chance of coastal showers tonight while a slight (20%) chance of evening inland showers (under 0.10 in. of rain possible),
  • Mostly cloudy with a slight (20%) chance of AM coastal showers otherwise just mostly cloudy and a bit warmer Saturday afternoon, a (40%) chance of coastal showers at night while a (30%) chance of inland showers late Saturday night (under 0.10 in. of rain possible),
  • Mostly cloudy and a bit cooler with a (40%) chance of showers Sunday (under 0.10 in. of rain possible),  a (30%) chance of showers at night (under 0.10 in. of rain possible),
  • Mostly cloudy with a slight (20%) chance of AM showers, becoming partly cloudy and a bit warmer Monday afternoon and evening, then mostly clear late Monday night,
  • lows near 48-39 highs 62-55 warming to 57 Monday.
  • Mostly sunny and a bit warmer Tuesday and Wednesday, mostly clear both nights,
  • Mostly sunny Thursday, mostly clear Thursday night,
  • Then partly cloudy Friday.
  • highs near 65 lows 42-45. (seasonal averages high 57 low 45)

Forecast for the Northern Oregon Cascades including Willamette Pass:

  • Mostly cloudy with occasional evening rain likely (70%), a slight (20%) chance of showers tonight (under 0.10 in. of rain possible),
  • Clouds and sun with  slight (20%) chance of AM showers, a mix of clouds and sun and a bit warmer Saturday afternoon, becoming mostly cloudy with a slight8 (20%) chance of evening rain, good (50%) chance of rain Saturday night,
  • Mostly cloudy and a bit cooler with a showers Sunday, snow showers likely (70%) with rain showers at night,
  • Mostly cloudy with a good (50%) chance of AM showers with snow showers likely (70%), a bit cooler with a good (50%) chance of showers Monday afternoon, then becoming partly cloudy late Monday night.
  • snow level 6,500 ft. tonight and Saturday, 7,500 ft. Saturday night, 6,000 ft. Sunday, 5,000 ft. falling to 4,500 ft. late Sunday night, 3,500 ft. Monday, then free air freezing level 5,000 ft. Monday night,
  • lows 32-36 cooling to 24 Monday night highs 49-40.
  • Some AM clouds, mostly sunny and a bit warmer Tuesday afternoon, mostly clear Tuesday night,
  • Mostly sunny and a bit warmer Wednesday, partly cloudy at night,
  • Mostly sunny and a bit warmer Thursday, mostly clear Thursday night,
  • Then mostly sunny Friday.
  • free air freezing level 9,000 ft. Tuesday, 11,000 ft. Tuesday night, 12,000 ft. Wednesday through Thursday, 13,000 ft. Thursday night, then 12,000 ft. Friday.
  • highs 52-62 lows  30-38.