April 28, 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 WATCH IS IN EFFECT FOR THE SILVIES RIVER NEAR BURNS AFFECTING HARNEY COUNTY UNTIL FURTHER NOTICE DUE TO SNOW MELT.
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
An Upper Level High Pressure Ridge continues to move to the east returning the flow of coastal moisture. The graphics for days 1-3 Show the cold front moving into Oregon Sunday. The graphics for days 3-7 Monday through next Friday show a quiet weather pattern until a frontal system slides into the Pacific Northwest next Friday..
Forecast For The South Willamette Valley Including Eugene-Springfield:
- Clear this evening, partly cloudy late tonight,
- Some AM clouds, sunny and cooler Saturday, partly cloudy Saturday night,
- Mostly cloudy and cooler Sunday, a slight (20%) chance of showers at night,
- Mostly cloudy with a slight (20%) chance of showers Monday and in the evening, then a good (50%) chance of showers late Monday night.
- lows 49-44 highs 75-62.
- Clouds and sun with a slight (20%) chance of AM showers, a mix of clouds and sun and a bit warmer Tuesday afternoon, partly cloudy with a slight (20%) chance of showers Tuesday night,
- Mostly cloudy and a bit cooler with a slight (20%) chance of showers Wednesday, a good (50%) chance of showers at night,
- Mostly cloudy and a bit cooler with a good (50%) chance of showers Thursday and Thursday night,
- Then mostly cloudy with a good (50%) chance of showers Friday.
- highs 6-59 lows near 46. (seasonal averages high 64 low 42)
Forecast for the Umpqua Valley including Roseburg:
- Partly cloudy this evening, mostly clear late tonight,
- Sunny and cooler Saturday, mostly clear in the evening, partly cloudy Saturday night,
- Mostly cloudy with a slight (20%) chance of AM rain and drizzle, just mostly cloudy and colder Sunday, mostly cloudy with a (30%) chance of showers at night (under 0.10 in. of rain possible),
- Mostly cloudy with a (30%) chance of showers Monday, then a (40%) chance of showers Monday night.
- lows 53-47 highs 82-62.
- Mostly cloudy and a bit warmer with a slight (20%) chance of showers Tuesday and Tuesday night,
- Mostly cloudy and a bit cooler with a (30%) chance of showers Wednesday and at night,
- Mostly cloudy with a good (50%) chance of AM showers, showers likely (70%) and a bit cooler Thursday afternoon, a (40%) chance of showers Thursday night,
- Then mostly cloudy with a good (50%) chance of showers Friday.
- highs 66-62 lows near 48. (seasonal averages high 67 low 44)
Forecast for the Oregon Coast including Coos Bay and North Bend:
- Mostly cloudy tonight,
- AM clouds, sunny and a bit warmer Saturday, partly cloudy in the evening, mostly cloudy with a slight (20%) chance of coastal rain and drizzle late at night while just mostly cloudy inland late Saturday night (under 0.10 in. of rain possible),
- Mostly cloudy with a slight (20%) chance of AM rain and drizzle, mostly cloudy and a bit cooler Sunday afternoon, a slight (20%) chance of coastal showers late at night while a slight (20%) chance of inland showers at night,
- Mostly cloudy with a slight (20%) chance of showers and a bit cooler Monday, then a (30%) chance of showers Monday night.
- lows 46-44 highs 69-58.
- Mostly cloudy and a bit warmer with a slight (20%) chance of showers Tuesday, a slight (20%) chance of showers Tuesday night,
- Mostly cloudy and a bit cooler with a slight (20%) chance of showers Wednesday, a (30%) chance of showers at night,
- Mostly cloudy and a bit cooler with a good (50%) chance of showers Thursday, then a (40%) chance of showers Thursday night and Friday.
- highs 58-56 lows near 44. (seasonal averages high 58 low 46)
Forecast for the Northern Oregon Cascades including Willamette Pass:
- Mostly clear tonight,
- Mostly sunny and cooler Saturday, partly cloudy Saturday night,
- Clouds and sun with a slight (20%) chance of AM showers, a mix of clouds and sun with a good (50%) chance showers and colder Sunday afternoon, mostly cloudy with a good (50%) chance of showers at night,
- Mostly cloudy with a (%) chance of AM snow showers, a good (50%) chance of showers and a bit colder Monday afternoon, then mostly cloudy with a showers likely (70%) Monday night.
- free air freezing level 13,000 ft. tonight, 12,000 ft. Saturday and Saturday night, snow level above 8,000 ft. falling to 7,500 ft. Sunday afternoon, 7,500 ft. falling to 6,000 ft. late Sunday night, 5,500 ft Monday, then 6,000 ft. Monday night.
- lows 42-33 highs 70-46.
- A mix of clouds and sun and a bit warmer with a good (50%) chance of showers Tuesday, mostly cloudy with a good (50%) chance of showers Tuesday night,
- Mostly cloudy with good (50%) chance of showers Wednesday, showers likely (70%) late at night,
- Mostly cloudy and a bit cooler with showers Thursday and in the evening, a (50%) chance of showers Thursday night,
- Mostly cloudy with AM snow showers likely (70%), then showers likely (70%) Friday afternoon.
- snow level 6,500 ft. Tuesday, 8,000 ft. Tuesday night, 7,500 ft. Wednesday and Wednesday night, 6,500 ft. Thursday, 6,000 ft. Thursday night, then 5,500 ft. Friday.
- highs 53-45 lows 37-34.