TIM CHUEY WEATHER

April 8, 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 UNTIL LATE FRIDAY EVENING FOR THE OWYHEE RIVER BELOW THE OWYHEE DAM AFFECTING MALHEUR COUNTY.
• A FROST ADVISORY IS IN EFFECT UNTIL 9 AM TODAY ABOVE 1,000 FT. FOR THE UPPER HOOD RIVER VALLEY.

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 through 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 today into Tuesday. The graphics for days 3-7    Thursday through Monday show frontal systems moving over the Pacific Northwest Wednesday and Friday.

Forecast For The South Willamette Valley Including Eugene-Springfield:

• Mostly sunny and a bit warmer today, mostly cloudy tonight,
• AM clouds, a mix of clouds sun and a bit warmer Tuesday afternoon, partly cloudy at night,
• Mostly sunny and a bit warmer Wednesday, then partly cloudy Wednesday night.
• highs 60-66 lows 45-39 warming to 40 Wednesday night.
• Mostly sunny and a bit cooler Thursday, mostly cloudy with a good (50%) chance of rain Thursday night,
• Mostly cloudy and cooler rain likely (70%) Friday, a good (50%) chance of rain at night,
• A mix of clouds and sun and a bit warmer with a good (50%) chance of rain Saturday, mostly cloudy with a good (50%) chance of rain Saturday night,
• Then a mix of clouds and sun and a bit warmer with a (40%) chance of rain Sunday.
• highs 65-55 warming to 58 Sunday lows 42-38. (seasonal averages high 60 low 39)

Forecast for the Umpqua Valley including Roseburg:

• AM clouds, partly cloudy and a bit warmer this afternoon, partly cloudy tonight,
• Mostly cloudy with patchy AM fog, partly cloudy and a bit warmer Tuesday afternoon, just partly cloudy at night,
• Partly cloudy and a bit warmer Wednesday, then partly cloudy Wednesday night.
• highs 63-72 lows 43-42.
• Partly cloudy and a bit cooler Thursday, mostly cloudy with a (30%) chance of rain Thursday night,
• Mostly cloudy and cooler with a good (50%) chance of rain and snow Friday, a (40%) chance of rain and snow at night,
• Mostly cloudy and a bit warmer with a (40%) chance of rain and snow Saturday, a slight (20%) chance of rain Saturday night,
• Mostly cloudy with a slight (20%) chance of AM rain and snow, then partly cloudy and a bit warmer with a slight (20%) chance of rain Sunday afternoon.
• highs 68-55 warming to 60 Sunday lows 42-38 warming to 40 Saturday night. (seasonal averages high 61 low 41)

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

• Some AM clouds, partly cloudy and a bit warmer this afternoon, partly cloudy in the evening, mostly cloudy late tonight,
• Mostly cloudy with patchy AM fog, partly cloudy and a bit warmer Tuesday afternoon, partly cloudy at night,
• Partly cloudy and a bit warmer Wednesday, then partly cloudy Wednesday night.
• highs 58-62 lows 44-42.
• Partly cloudy and a bit cooler Thursday, mostly cloudy with a (40%) chance of rain Thursday night,
• Mostly cloudy and a bit cooler with a good (50%) chance of rain Friday, a (40%) chance of rain at night,
• Mostly cloudy and a bit warmer with a (40%) chance of rain Saturday, a slight (20%) chance of rain Saturday night,
• Mostly cloudy with a slight (20%) chance of AM rain, then partly cloudy and a bit warmer with a slight (20%) chance of rain Sunday afternoon.
• highs 58-53 warming to 57 Sunday lows 42-40. (seasonal average high 56 low 43)

Forecast for the Northern Oregon Cascades including Willamette Pass:

• Mostly sunny and a bit warmer today, partly cloudy tonight,
• Mostly sunny and a bit warmer with a slight (20%) chance of showers Tuesday, partly cloudy at night,
• Mostly sunny and warmer Wednesday, partly cloudy in the evening, then mostly clear Wednesday night.
• free air freezing level 4,000 ft. rising to 6,000 ft. this afternoon, 6,000 ft. tonight, snow level 6,000 ft. Tuesday, then 8,000 ft. Tuesday night,
• highs 46-59 lows 32-30 warming to 35 Wednesday night.
• Mostly sunny and a bit cooler Thursday, mostly cloudy with a good (50%) chance of rain and snow Thursday night,
• Mostly cloudy and cooler with snow and rain likely (70%) Friday, snow and rain likely (70%) at night,
• Mostly cloudy with a good (50%) chance of AM snow and rain, partly cloudy and a bit cooler with a good (50%) chance of snow and rain Saturday afternoon, mostly cloudy with a good (50%) chance of snow and rain Saturday night,
• A mix of clouds and sun and a bit warmer with a good (50%) chance of snow and rain Sunday.
• free air freezing level 10,000 ft. Thursday, snow level 5,500 ft. Thursday night, 4,000 ft. Friday, 3,000 ft. Friday night, then 3,500 ft. Saturday through Sunday.
• highs 57-38 warming to 43 Sunday lows 32-27.