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Tim Chuey Weather

by | Apr 17, 2023 | Weather

April 17, 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 FLOOD ADVISORY IS IN EFFECT DUE TO SNOW MELT UNTIL 3 PM MONDAY FOR HARNEY COUNTY.
  • A WINTER WEATHER ADVISORY IS IN EFFECT UNTIL 5 AM TUESDAY ABOVE 4,000 FT. FOR THE NORTHERN OREGON CASCADES AND THE CASCADES IN LANE COUNTY.
  • A WINTER WEATHER ADVISORY IS IN EFFECT UNTIL 11 PM TONIGHT FOR CENTRAL AND EASTERN LAKE COUNTY.
  • A WINTER WEATHER ADVISORY IS IN EFFECT UNTIL 11 PM TONIGHT FOR THE SOUTH CENTRAL OREGON CASCADES, THE SISKIYOU MOUNTAINS, THE SOUTHERN OREGON CASCADES, THE KLAMATH BASIN, NORTHERN AND EASTERN KLAMATH COUNTY, AND WESTERN LAKE COUNTY.
  • A WINTER WEATHER ADVISORY IS IN EFFECT UNTIL 5 AM TUESDAY ABOVE 4,500 FT. FOR THE EAST SLOPES OF THE OREGON CASCADES.

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

n Upper Level High Pressure Ridge (“Arch” shape) is moving and will push frontal systems our way. The graphics for days 1-3 show the cold front moving through the Pacific Northwest. The graphics for days 3-7  Thursday through next Monday 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 evening showers and a slight (20%) chance of thunderstorms, showers likely (70%) with a good (50%) chance of snow showers and thunderstorms late tonight (0.25 in. of rain possible, more in storms small hail possible, snow level 1,000 ft.),
  • Mostly cloudy with AM showers and a slight (20%) chance of thunderstorms, showers with a (30%) chance of thunderstorms and a slightly warmer Tuesday afternoon (0.25 in. of rain  possible, more in storms, snow level 1,000 ft.), evening showers and a slight (20%) chance of thunderstorms, showers likely (70%) with a slight (25%) chance of thunderstorms late Tuesday night (0.25 in. of rain possible, more in storms),
  • Mostly cloudy and a bit cooler with showers and a slight (20%) chance of thunderstorms Wednesday and in the evening, a good (50%) chance of showers late at night,
  • Mostly cloudy with a good (50%) chance of AM showers, a bit warmer with showers likely (70%) Thursday afternoon, a good (50%) chance of evening showers, then partly cloudy with a good (50%) chance of showers late Thursday night.
  • lows near 36 highs 52-48 warming to 53 Thursday.
  • Clouds and sun with a (30%) chance of AM showers, a mix of clouds and sun with a slight (20%) chance of showers and a bit warmer Friday afternoon, just partly cloudy Friday night,
  • A mix of clouds and sun with a slight (20%) chance of showers and a bit warmer Saturday afternoon, mostly cloudy with a good (50%) chance of showers at night,
  • Then mostly cloudy with a good (50%) chance of showers and a bit cooler Sunday through Monday.
  • highs 59-66 cooling to 57 Monday lows 40-46 cooling to 43 Sunday night. (seasonal averages high 62 low 40)

Forecast for the Umpqua Valley including Roseburg:

  • Mostly cloudy with evening rain showers and snow showers with a slight (20%) chance of thunderstorms then showers and snow showers likely (70%) with a slight (20%) chance of thunderstorms late tonight (under 0.10 in. of rain possible, 1-2 in. of snow possible, snow level 2,000 ft. falling to 1,000 ft.),
  • Mostly cloudy with a (40%) chance of showers, snow showers and a slight (20%) chance of thunderstorms and a bit cooler Tuesday and in the evening (under 0.10 in. of rain possible, snow level 1,000 ft. rising to 1,500 ft. in the afternoon), a good (50%) chance of rain showers and snow showers with a slight (20%) chance of thunderstorms late Tuesday night (under 0.10 in. of rain possible, 1 in. of snow possible, snow level 2,500 ft. falling to 2,000 ft. late at night),
  • Mostly cloudy with rain showers and snow showers with a slight (20%) chance of thunderstorms Wednesday, a (30%) chance of evening rain showers and snow showers and a slight (20%) of thunderstorms, a slight (20%) chance of rain and snow showers late Wednesday night (snow level 2,500 ft. falling to 2,000 ft. late at night),
  • Mostly cloudy with a (30%) chance of AM rain and snow showers, a bit warmer with a good (50%) chance of showers Thursday afternoon, then a (40%) chance of showers Thursday night.
  • lows 36-38 cooling back to 36 Wednesday night warming to 40 Thursday night highs 50-56.
  • Mostly cloudy with AM frost and a slight (20%) chance of showers, decreasing clouds and a bit warmer Friday afternoon, just partly cloudy Friday night,
  • Mostly cloudy and a bit warmer Saturday, a slight (20%) chance of showers at night,
  • Then mostly cloudy and a bit cooler with a (30%) chance of showers Sunday through Monday.

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

  • Mostly cloudy with evening coastal showers with a slight (20%) chance of thunderstorms and coastal showers likely (70%) with a slight (20%) chance of thunderstorms late tonight while inland evening rain and snow showers and inland showers and snow showers with a (30%) chance of thunderstorms late tonight (0.25 in. of rain possible, no snow accumulation expected, snow level 1,500 ft.),
  • Mostly cloudy with AM coastal showers likely (70%) with a slight (20%) chance of thunderstorms and slightly cooler with coastal showers likely (70%) and a slight (20%) chance of thunderstorms Tuesday afternoon while AM inland showers, snow showers and a slight (20%) chance of thunderstorms and inland showers snow showers and a slight (20%) chance of thunderstorms and a bit warmer Tuesday afternoon (0.10 in. of rain possible, snow level 1,500 ft.), evening showers and a slight (20%) chance of thunderstorms, coastal showers with a slight (20%) chance of thunderstorms late Tuesday night while inland showers, snow showers and a slight (20%) chance of thunderstorms late at night (0.10 in. of rain possible, snow level 2,000 ft. late at night),
  • Mostly cloudy with AM coastal showers and a slight (20%) chance of thunderstorms and coastal showers likely (70%) with a slight (20%) chance of thunderstorms and a bit warmer Wednesday afternoon while inland AM showers, snow showers with a slight (20%) chance of thunderstorms and inland showers with a slight (20%) chance of thunderstorms Wednesday afternoon, a  (30%) chance of showers Wednesday night,
  • Mostly cloudy and a bit warmer with a good (50%) chance of showers Thursday, then a (40%) chance of showers Thursday night.
  • lows 36-39 highs 50-55.
  • Mostly cloudy with a slight (20%) chance of AM showers, just mostly cloudy and a bit warmer Friday afternoon, mostly cloudy Friday night.
  • Mostly cloudy and a bit warmer Saturday, a (30%) chance of showers at night,
  • Mostly cloudy and a bit cooler with a (30%) chance of showers Sunday, a slight (20%) chance of showers Sunday night,
  • Then mostly cloudy and a bit cooler with a (30%) chance of showers Monday.
  • highs 60-62 cooling to 55 Monday lows 42-44 cooling back to 42 Sunday night. (seasonal averages high 57 low 44)

Forecast for the Northern Oregon Cascades including Willamette Pass:

  • Mostly cloudy with evening snow showers and a slight (20%) chance of thunderstorms, snow showers likely (70%) with a slight (20%) chance of thunderstorms late tonight (0.50 in. of rain possible, 3-6 in. of snow possible),
  • Mostly cloudy with AM snow showers likely (70%), rain showers and snow showers likely (70%) with a slight (20%) chance of thunderstorms and a bit warmer Tuesday afternoon (0.25 in. of rain possible, 1-3 in. of snow possible), evening snow showers with a slight (20%) chance of thunderstorms, snow showers likely (70%) late Tuesday night (0.25 in. of rain possible, 1-3 in. of snow possible)
  • Mostly cloudy with AM snow showers, a bit cooler with snow showers and a slight (20%) chance of thunderstorms Wednesday afternoon, a good (50%) chance of snow showers late at night,
  • Mostly cloudy with a good (50%) chance of AM snow showers, snow showers likely (70%) with a good (50%) chance of rain showers and a bit warmer Thursday afternoon, then a good (50%) chance of rain and snow showers late Thursday night.
  • snow level at the surface tonight, 2,500 ft. Tuesday afternoon, 2,000 ft. Tuesday night through Wednesday night, 3,000 ft. Thursday, then 3,500 ft. Thursday night.
  • lows 22-26 highs 34-32 warming to 45 Thursday.
  • Clouds and sun with a (40%) chance of AM rain and snow showers, a mix of clouds and sun with a slight (20%) chance of  showers and a bit warmer Friday afternoon, just partly cloudy Friday night,
  • Partly cloudy and a bit warmer Saturday, becoming mostly cloudy with a good (50%) chance of showers Saturday night,
  • Mostly cloudy and a bit cooler with a good (50%) chance of showers Sunday, a good (50%) chance of showers and snow showers late Sunday night,
  • Mostly cloudy with a good (50%) chance of AM snow showers, then a good (50%) chance of showers and a bit cooler Monday.
  • snow level 5,000 ft. Friday, free air freezing level 7,500 ft. Friday night, 9,000 ft. Saturday, 7,000 ft. Saturday night, 6,500 ft. Sunday, 6,000 ft. Sunday night, then 5,000 ft. Monday.
  • highs 45-52 cooling to 44 Monday lows  29-34.