TIM CHUEY WEATHER

April 7, 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 FLOOD WARNING IS IN EFFECT THROUGH LATE WEDNESDAY MORNING FOR THE OWYHEE RIVER BELOW THE OWYHEE DAM AFFECTING MALHEUR COUNTY.

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:

A strong Upper Level Low Pressure Trough (“U” shape) is moving into the Pacific Northwest to be followed by a building Upper Level High Pressure Ridge next week. The graphics for days 1-3  show a frontal system moving into the Pacific Northwest overnight. The graphics for days 3-7    Wednesday through Sunday show frontal systems moving over the Pacific Northwest Wednesday and Friday.

Forecast For The South Willamette Valley Including Eugene-Springfield:

• Mostly cloudy, possible sun breaks, and a bit warmer with a good (50%) chance of showers today (under 0.10 in. of rain possible), mostly cloudy with patchy frost late tonight,
• Mostly sunny and a bit warmer Monday, partly cloudy at night,
• AM clouds, a mix of clouds and a bit warmer Tuesday, then partly cloudy Tuesday night.
• highs 54-63 lows 36-43 cooling to 40 Tuesday night .
• A mix of clouds and sun and a bit warmer Wednesday, partly cloudy Wednesday night,
• Mostly sunny and a bit warmer Thursday, partly cloudy with a (40%) chance of rain at night,
• A mix of clouds and sun and a bit cooler with a (40%) chance of rain Friday, partly cloudy with a slight (20%) chance of rain Friday night,
• Then mostly sunny with a slight (20%) chance of rain Saturday.
• highs 66-68 cooling to 60 Friday and Saturday lows 40-42 cooling to 38 Friday night. (seasonal averages high 60 low 39)

Forecast for the Umpqua Valley including Roseburg:

• Mostly cloudy with a (40%) chance of AM rain and snow, a (40%) chance of rain this afternoon (under 0.10 in. of rain possible), ,just mostly cloudy late tonight (under 0.10 in. of rain possible),
• AM clouds, sunny and a bit warmer Monday afternoon, mostly clear at night,
• Partly cloudy and a bit warmer Tuesday, then just partly cloudy Tuesday night.
• highs 56-66 lows 39-43.
• Partly cloudy and a bit warmer Wednesday and Thursday, partly cloudy both nights,
• Mostly cloudy and cooler Friday, partly cloudy Friday night,
• Then partly cloudy and a bit warmer Saturday.
• highs 70-72 cooling to 60 Friday warming to lows 44-46. (seasonal averages high 61 low 41)

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

• Mostly cloudy and a bit warmer with a (40%) chance of rain today (0.10 in. of rain possible), just mostly cloudy tonight,
• Some AM clouds, sunny and a bit warmer Monday afternoon, mostly clear in the evening, partly cloudy at night,
• Mostly cloudy start, partly cloudy Tuesday afternoon and evening, then mostly cloudy Tuesday night.
• highs 54-59 lows 39-44 cooling to 42 Tuesday night.
• Mostly cloudy start, partly cloudy and a bit warmer Wednesday afternoon, partly cloudy Wednesday night,
• Partly cloudy and a bit cooler Thursday, mostly cloudy at night,
• Mostly cloudy and a bit cooler Friday, then partly cloudy Friday night and Saturday.
• highs 62-56 lows 43-40. (seasonal average high 56 low 43)

Forecast for the Northern Oregon Cascades including Willamette Pass:

• Mostly cloudy with a good (50%) chance of AM snow and rain showers, rain and snow showers likely (70%) and a bit warmer this afternoon, a good (50%) chance of evening rain and show showers, just mostly cloudy late tonight (under 0.10 in. of rain possible),
• Mostly sunny and a bit warmer Monday, partly cloudy Monday night,
• Mostly sunny and a bit warmer with a slight (20%) chance of showers Tuesday, then partly cloudy Tuesday night.
• snow level 3,000 ft. rising to 4,000 ft. this afternoon, 3,500 ft. tonight, free air freezing level 3,500 ft. rising to 5,500 ft. Monday, 7,000 ft. Monday night, 6,000 ft. Tuesday, then 9,000 ft. Tuesday night.
• highs 39-50 lows 25-30.
• Mostly sunny and a bit warmer Wednesday, partly cloudy Wednesday night,
• Mostly sunny Thursday, partly cloudy with a good (50%) chance of evening rain and snow, mostly cloudy with a good (50%) chance of rain and snow at night,
• A mix of clouds and sun and cooler with a good (50%) chance of rain and snow Friday, a (40%) chance of snow and rain Friday night,
• Then a mix of clouds and sun with a (40%) chance of snow and rain Saturday.
• free air freezing level 10,000 ft. Wednesday through Thursday, snow level 6,500 ft. Thursday night, 5,000 ft. Friday, then 4,000 ft. Friday night and Saturday.
• highs 60-47 lows 36-29.