TIM CHUEY WEATHER

April 3, 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

NONE AT THIS TIME.

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 (“Arch” shape) still hung on for one more day today. The graphics for days 1-3  show a frontal systems moving through the Pacific Northwest tonight. The graphics for days 3-7    Friday through Tuesday show a parade of frontal system moving into and through the Pacific Northwest through the period.

Forecast For The South Willamette Valley Including Eugene-Springfield:

• Cloudy with AM rain, colder with a good (50%) chance of rain and snow this afternoon (0.10 in. of rain possible, snow level 2,500 ft. this afternoon), evening rain and snow likely (70%), a good (50%) chance of rain and snow late tonight (under 0.10 in. of rain possible, snow level 2,000 ft. falling to 1,500 ft.),
• Mostly cloudy with patchy AM fog and a good (50%) chance of rain and snow showers, showers and snow showers likely (70%) with a slight (20%) chance of thunderstorms Thursday afternoon (under 0.10 in. of rain possible, snow level 1,000 ft. rising to 1,500 ft.), a (40%) chance of evening rain showers and snow showers with a slight (20%) chance of thunderstorms, a slight (20%) chance of rain and snow showers at night (under 0.10 in. of rain possible, snow level 2,000 ft.),
• Mostly cloudy with a good (50%) chance of AM rain and snow, a bit warmer with a good (50%) chance of rain Friday afternoon, then a good (50%) chance of rain and snow Friday night.
• highs 49-52 lows 37-39.
• Mostly cloudy with a good (50%) chance of AM rain and snow, rain likely (70%) Saturday afternoon, evening rain, a good (50%) chance  of rain and snow late Saturday night,
• Mostly cloudy with a good (50%) chance of AM rain and snow, a good (50%) chance of rain and a bit warmer Sunday afternoon, partly cloudy with a slight (20%) chance of evening rain, just partly cloudy  late at night,
• Mostly cloudy start, partly cloudy and a bit warmer Monday afternoon, partly cloudy with a slight (20%) chance of rain Monday night,
• Then partly cloudy and a bit warmer with slight (20%) chance of rain Tuesday.
• highs 52-64 lows near 39. (seasonal averages high 61 low 41)

Forecast for the Umpqua Valley including Roseburg:

• Cloudy with AM rain, colder with a good (50%) chance of rain and snow this afternoon (0.10 in. of rain possible, snow level 2,500 ft. this afternoon), evening rain and snow likely (70%), a good (50%) chance of rain and snow late tonight (under 0.10 in. of rain possible, snow level 2,000 ft. falling to 1,500 ft.),
• Mostly cloudy with patchy AM fog and a good (50%) chance of rain and snow showers, showers and snow showers likely (70%) with a slight (20%) chance of thunderstorms Thursday afternoon (under 0.10 in. of rain possible, snow level 1,000 ft. rising to 1,500 ft.), a (40%) chance of evening rain showers and snow showers with a slight (20%) chance of thunderstorms, a slight (20%) chance of rain and snow showers at night (under 0.10 in. of rain possible, snow level 2,000 ft.),
• Mostly cloudy with a good (50%) chance of AM rain and snow, a bit warmer with a good (50%) chance of rain Friday afternoon, then a good (50%) chance of rain and snow Friday night.
• highs 49-52 lows 37-39.
• Mostly cloudy with a good (50%) chance of AM rain and snow, rain likely (70%) Saturday afternoon, evening rain, a good (50%) chance  of rain and snow late Saturday night,
• Mostly cloudy with a good (50%) chance of AM rain and snow, a good (50%) chance of rain and a bit warmer Sunday afternoon, partly cloudy with a slight (20%) chance of evening rain, just partly cloudy  late at night,
• Mostly cloudy start, partly cloudy and a bit warmer Monday afternoon, partly cloudy with a slight (20%) chance of rain Monday night,
• Then partly cloudy and a bit warmer with slight (20%) chance of rain Tuesday.
• highs 52-64 lows near 39. (seasonal averages high 61 low 41)

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

• Cloudy with a (30%) chance of coastal rain and cooler today while inland AM rain and inland rain likely (70%) and a bit cooler this afternoon (under 0.10 in. of rain possible), a good (50%) chance of evening coastal rain and coastal showers likely (70%) with a slight (20%) chance of thunderstorms late tonight while inland evening snow likely (70%) with inland rain and snow showers likely (70%) late tonight (under 0.10 in. of rain possible),
• Mostly cloudy with patchy fog and a good (50%) chance of AM coastal AM showers while a good (50%) chance of inland AM patchy fog and rain and  snow showers, showers likely (70%) with a slight (20%) chance of thunderstorms Thursday afternoon (under 0.10 in. of rain possible), a good (50%) chance of showers with a slight (20%) chance of thunderstorms at night (under 0.10 in. of rain possible),
• Mostly cloudy with a (40%) chance of AM rain and snow, a (40%) chance of rain and a bit warmer Friday afternoon, then a (0%) chance of rain Friday night .
• highs 50-53 lows 36-42.
• Mostly cloudy with a good (50%) chance of AM rain, rain likely (70%) Saturday afternoon, evening rain, rain likely (70%) Saturday night,
• Mostly cloudy and a bit warmer with a good (50%) chance of rain Sunday, partly cloudy with a slight (20%) chance of evening rain, just partly cloudy late at night,
• Mostly cloudy start, partly cloudy and a bit warmer Monday afternoon and evening,mostly cloudy with a slight (20%) chance of rain late Monday night,
• Partly cloudy and a bit warmer with a slight (20%) chance of AM rain, then just partly cloudy Tuesday afternoon.
• highs 53-60 lows 42-40 warming back to 42 Monday night. (seasonal average high 56 low 43)

Forecast for the Northern Oregon Cascades including Willamette Pass:

• Mostly cloudy with AM snow and rain showers, a good (50%) chance of snow and rain showers and colder this afternoon (0.25 in. of rain possible, little or no snow accumulation expected), evening showers, snow showers late tonight (0.25 in. of rain possible, 1-3 in. of snow possible),
• Mostly cloudy with AM snow showers, snow and rain showers and a bit cooler Thursday afternoon, evening snow and rain showers likely (70%), a good (50%) chance of snow showers late at night,
• Mostly cloudy and a bit warmer with snow and rain showers likely (70%) Friday, then snow and rain showers likely (70%) Friday night.
• snow level 3,500 ft. today, 2,000 ft. tonight, at the surface Thursday, 2,000 ft. Thursday night, 2,500 ft. Friday, then 3,000 ft. Friday night.
• highs 63-32 lows 23-25.
• Mostly cloudy and a bit warmer with snow and rain likely (70%) Saturday, snow and rain likely (70%) Saturday night,
• Mostly cloudy and a bit warmer with snow and rain likely (70%) Sunday, a (40%) chance of  evening rain and snow showers, partly cloudy with a  (40%) chance of rain and snow showers late at night,
• Mostly sunny and a bit warmer with a slight (20%) chance of rain and snow showers Monday, partly cloudy with a slight (20%) chance of rain and snow showers Monday night,
• Mostly sunny and a bit warmer with a slight (20%) chance of rain and snow showers Tuesday.
• snow level 2,500 ft. Saturday, 3,500 ft. Saturday night through Monday, 4,500 ft. Monday night, then 5,500 ft. Tuesday.
• highs 33-45 lows near 25.