TIM CHUEY WEATHER

April 15, 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 WIND ADVISORY IS IN EFFECT UNTIL 11 PM TONIGHT FOR THE EASTERN COLUMBIA RIVER GORGE OF OREGON AND NORTH CENTRAL OREGON.
• A WIND ADVISORY IS IN EFFECT UNTIL 11 PM TONIGHT FOR THE LOWER COLUMBIA BASIN OF OREGON.
• A WIND ADVISORY IS IN EFFECT UNTIL 11 PM TONIGHT FOR THE FOOTHILLS OF THE NORTHERN BLUE MOUNTAINS OF OREGON AND THE SOUTHERN BLUE MOUNTAINS OF OREGON.
• A WIND ADVISORY IS IN EFFECT UNTIL 11 PM TONIGHT FOR THE EASTERN COLUMBIA RIVER GORGE OF OREGON AND NORTH CENTRAL OREGON.
• A FROST ADVISORY IS IN EFFECT FROM 11 PM TUESDAY THROUGH 9 AM WEDNESDAY FOR THE CLATSOP COUNTY COAST, THE TILLAMOOK COUNTY COAST, THE CENTRAL COAST OF OREGON, THE NORTH OREGON COAST RANGE LOWLANDS, THE CENTRAL OREGON COAST RANGE LOWLANDS, THE NORTH OREGON COAST RANGE, THE CENTRAL OREGON COAST RANGE, THE LOWER COLUMBIA RIVER, THE TUALATIN VALLEY, PORTLAND WEST HILLS AND CHEHALEM MOUNTAIN, THE INNER PORTLAND METRO, EAST PORTLAND METRO, THE OUTER SOUTHEAST PORTLAND METRO, THE WEST CENTRAL WILLAMETTE VALLEY, THE EAST CENTRAL  WILLAMETTE VALLEY, THE EAST CENTRAL WILLAMETTE VALLEY, THE BENTON COUNTY LOWLANDS, THE LINN COUNTY LOWLANDS, THE LANE COUNTY LOWLANDS (WHICH INCLUDE EUGENE & SPRINGFIELD), THE WEST COLUMBIA RIVER GORGE OF OREGON ABOVE 500 FT., THE WEST COLUMBIA RIVER GORGE I-85 CORRIDOR, THE CLACKAMAS COUNTY CASCADE FOOTHILLS, THE CASCADE FOOTHILLS OF MARION AND LINN COUNTIES, AND THE LANE COUNTY CASCADE FOOTHILLS.
• A FREEZE WARNING IS IN EFFECT FROM 11 PM TUESDAY UNTIL 9 AM WEDNESDAY FOR THE UPPER HOOD RIVER VALLEY.
• A FREEZE WATCH IS IN EFFECT FROM LATE TUESDAY NIGHT THROUGH WEDNESDAY MORNING FOR EASTERN CURRY COUNTY AND JOSEPHINE COUNTY, AND JACKSON COUNTY.
• A FLOOD WARNING IS IN EFFECT UNTIL EARLY FRIDAY APRIL 19 TH 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:

An Upper Level High Pressure Ridge  brings the Pacific Northwest more sunshine.  The graphics for days 1-3  show a cold front sliding into Oregon today with little or no effect on our weather. The graphics for days 3-7     Wednesday through Sunday show a frontal system offshore next Saturday moving across the Pacific Northwest between Saturday night and next Sunday.  A complex frontal system will be offshore next Monday.

Forecast For The South Willamette Valley Including Eugene-Springfield:

• Partly cloudy with a slight (20%) chance of evening showers, just partly cloudy late tonight,
• Mostly sunny and a bit cooler Tuesday, partly cloudy in the evening, mostly clear with areas of frost late Tuesday night,
• Areas of AM frost, sunny and a bit warmer Wednesday afternoon, mostly clear at night,
• Sunny and a bit warmer Thursday, then mostly clear Thursday night.
• lows 38-33 warming back to 40 Thursday night highs 57-70.
• Sunny and a bit warmer Friday, partly cloudy Friday night,
• A mix of clouds and sun and a bit cooler with a slight (20%) chance of showers Saturday, mostly cloudy with a slight (20%) chance of evening showers, partly cloudy with a slight (20%) chance of showers late at night,
• A mix of clouds and sun and a bit cooler Sunday, mostly cloudy in the evening, partly cloudy late Sunday night,
• Then mostly sunny and a bit warmer Monday.
• highs 72-63 warming to 65 Monday lows near 42. (seasonal averages high 61 low 40)

Forecast for the Umpqua Valley including Roseburg:

• Partly cloudy with a slight (20%) chance of evening showers, mostly cloudy late tonight,
• AM clouds, mostly sunny Tuesday afternoon, mostly clear with areas of frost late Tuesday night,
• Areas of AM frost, sunny and a bit warmer Wednesday afternoon, mostly clear at night,
• Mostly sunny and a bit warmer Thursday, then mostly clear Thursday night.
• lows 38 warming to 42 highs 56-60.
• Mostly sunny and a bit warmer Friday, mostly clear Friday night,
• Mostly cloudy and a bit cooler with a slight (20%) chance of rain Saturday, a slight (20%) chance of rain at night,
• Mostly cloudy start, partly cloudy Sunday afternoon and Sunday night,
• Then partly cloudy Monday.
• highs 66-60 lows 43-45 cooling back to 43 Saturday night. (seasonal averages high 63 low 42)

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

• Partly cloudy tonight,
• AM clouds, mostly sunny Tuesday afternoon, mostly clear in the evening, partly cloudy at night with areas of inland frost late Tuesday night,
• Sunny and a bit warmer Wednesday, mostly clear at night,
• Sunny and a bit warmer Thursday, then partly cloudy Thursday night.
• lows 42-38 warming to 44 Thursday night highs 55-66.
• Partly cloudy and a bit cooler Friday, partly cloudy Friday night,
• Mostly cloudy and a bit cooler with a slight (20%) chance of rain Saturday, a slight (20%) chance of rain at night,
• Mostly cloudy  Sunday and Sunday night,
• Mostly cloudy start, then partly cloudy and a bit cooler Monday afternoon.
• highs 65-58 lows 45-42. (seasonal average high 57 low 44)

Forecast for the Northern Oregon Cascades including Willamette Pass:

• Mostly cloudy with a slight (20%) chance of evening rain and snow showers, just mostly cloudy late tonight,
• Mostly sunny and a bit cooler Tuesday, partly cloudy in the evening, mostly clear late Tuesday night,
• Sunny and a bit warmer Wednesday, mostly clear at night,
• Sunny and a bit warmer Thursday, then mostly clear Thursday night.
• snow level 3,500 ft.tonight, free air freezing level 4,000 ft. rising to 5,000 ft. Tuesday afternoon, 5,000 ft. falling to 3,500 ft. late Tuesday night, 5,500 ft. Wednesday afternoon, 7,000 ft. falling to 6,500 ft. late Wednesday night, 8,000 ft. Thursday, then 9,000 ft. Thursday night.
• lows 28-22 warming to 32 Thursday night highs 45-56.
• Sunny and a bit warmer Friday, mostly clear Friday night,
• Mostly sunny and a bit cooler with a slight (20%) chance of showers Saturday, mostly cloudy with a slight (20%) chance of evening rain and snow showers, partly cloudy with a slight (20%) chance of rain and snow showers late at night,
• Mostly sunny with a slight (20%) chance of rain and snow showers Sunday, partly cloudy Sunday night,
• Then mostly sunny and a bit warmer with a slight (20%) chance of rain and snow showers Monday.
• free air freezing level 9,000 ft. Friday and Friday night, snow level 6,000 ft. Saturday, 5,500 ft. Saturday night and Sunday, free air freezing level 8,000 ft. Sunday night, then 6,000 ft. Monday.
• highs 58-54 warming to 56 Monday lows 34-32 warming back to 34  Sunday night.