An Upper Level Low Pressure Trough (“U” shape) will continue the col onshore airflow through the Pacific Northwest. The graphics for days 1-3 show a frontal system moving through the Pacific Northwest Wednesday. The graphics for days 3-7 Thursday through Monday show a frontal system pushing into the Pacific Northwest next Friday and Saturday and another Monday and Tuesday.
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ADVISORIES:
- NONE AT THIS TIME.
HEALTH ADVISORIES:
- A RECREATION HEALTH ADVISORY HAS BEEN ISSUED FOR LAKE BILLY CHINOOK, PEOPLE SHOULD AVOID SWIMMING AND HIGH SPEED WATER ACTIVITIES SUCH AS WATER SKIING OR POWER BOATING IN AREAS WHERE BLOOMS ARE PRESENT AS THE MAJOR ROUTE OF EXPOSURE IS INGESTION OF WATER, OREGON HEALTH OFFICIALS SAID. TOXINS ARE NOT ABSORBED THROUGH THE SKIN, THOUGH THOSE WITH SKIN SENSITIVITIES MAY DEVELOP A PUFFY RED RASH. THE OREGON HEALTH AUTHORITY ENCOURAGED PEOPLE TO VISIT LAKE BILLY CHINOOK FOR ACTIVITIES SUCH AS FISHING, CAMPING, HIKING, BIKING, PICNICKING, BIRD WATCHING, CANOEING, AND KAYAKING. BOATING IS SAFE AS LONG AS SPEEDS DO NOT CREATE EXCESSIVE WATER SPRAY, WHICH COULD LEAD TO THE RISK OF INHALING CYANOTOXINS.
- 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.
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Forecast for the Southern and lower Mid Willamette Valley including Eugene-Springfield and Albany-Corvallis:
- Mostly cloudy tonight,
- Mostly cloudy start, a mix of clouds and sun and cooler Wednesday afternoon, mostly cloudy in the evening, partly cloudy late Wednesday night,
- AM clouds, a mix of clouds and sun and a bit warmer Thursday afternoon, partly cloudy at night,
- Mostly sunny and a bit warmer Friday, then mostly clear Friday night.
- lows 52-50 warming back to 52 Friday night highs 75-79.
- Sunny and a bit warmer Saturday, clear Saturday night,
- Sunny and a bit warmer Sunday, clear at night,
- Sunny and a bit warmer Monday, partly cloudy Monday night,
- Then sunny and a bit cooler Tuesday.
- highs 83-89 cooling to 86 Tuesday lows 54-56 cooling back to 54 Monday night. (seasonal averages high 77 low 49).
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Forecast for the Umpqua Valley including Roseburg:
- Partly cloudy this evening, mostly cloudy late tonight,
- AM cloud, sunny and a bit cooler Wednesday, mostly clear in the evening, partly cloudy late Wednesday night,
- Mostly cloudy start, partly cloudy Thursday afternoon, mostly clear ion the evening, then partly cloudy late cloudy at night,
- AM clouds, sunny and a bit warmer Friday afternoon, then mostly clear Friday night.
- lows 57-59 cooling to 55 Thursday night highs 80-82. .
- Sunny and a bit warmer Saturday, clear Saturday night,
- Sunny and as bit warmer Sunday, mostly clear at night,
- Mostly sunny Monday, mostly clear Monday night,
- Then sunny and a bit cooler Tuesday.
- highs 87-90 cooling back to 87 Tuesday lows 57-60 (seasonal averages high 80 low 54).
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Forecast for The South Oregon Coast Including Coos Bay and North Bend:
- Partly cloudy with patchy evening fog, mostly cloudy with patchy fog late tonight,
- AM clouds with patchy fog, mostly sunny Wednesday afternoon, partly cloudy in the evening, mostly cloudy with patchy fog and a slight (20%) chance of drizzle late Wednesday night,
- AM clouds with patchy fog and a slight (20%) chance of drizzle, partly cloudy and a bit warmer Thursday afternoon, partly cloudy with patchy fog at night,
- Mostly cloudy with patchy AM fog, sunny Friday afternoon, then mostly clear Friday night.
- lows 53-50 warming to 52 Friday night highs 62-68.
- Mostly sunny and a bit warmer Saturday, mostly clear Saturday night,
- Mostly sunny Sunday, mostly clear at night,
- Partly cloudy and a bit cooler Monday, partly cloudy Monday night,
- Then partly cloudy Tuesday.
- highs 62-69 lows near 52.
- (seasonal averages high 64 low 52). _______________
Forecast for the Northern Oregon Cascades including the Cascades in Lane County:
- Mostly cloudy tonight,
- Mostly sunny and a bit cooler Wednesday, mostly cloudy Wednesday night,
- Mostly sunny and a bit warmer Thursday, partly cloudy at night,
- Mostly sunny and a bit warmer Friday, then mostly clear Friday night.
- free air freezing level 13,000 ft. tonight, 13,000 ft. falling to 12,000 ft. Wednesday afternoon, 12,000 ft. Wednesday night and Thursday, 13,000 ft. Thursday night, then 13,000 ft. Friday and Friday night.
- lows 45-42 warming to 44 Friday night highs 67-65 warming back to 67 Friday.
- Sunny and a bit warmer Saturday, clear Saturday night,
- Sunny and a bit warmer Sunday, mostly clear at night,
- Sunny and a bit warmer Monday, partly cloudy with a slight (20%) chance of showers Monday night,
- Then sunny and a bit cooler Tuesday.
- free air freezing level 14,000 ft. Saturday, 15,000 ft. Saturday night through Monday, snow level above 8,000 ft Monday night, then free air freezing level 15,000 ft. Tuesday.
- highs 73-84 cooling to 79 Tuesday lows 48-54 cooling to 52 Monday night.