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September 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

  • NONE AT THIS TIME

HEALTH ADVISORIES

  • A RECREATIONAL USE HEALTH ADVISORY IS IN EFFECT FOR LAKE  EWAUNA IN KLAMATH COUNTY DUE TO THE PRESENCE OF A CYANOBACTERIA BLOOM. PEOPLE SHOULD AVOID SWIMMING AND HIGH SPEED WATER ACTIVITIES, SUCH AS WATER SKIING OR POWER BOATING, IN AREAS OF THE LAKE AND SLOUGH WHERE BLOOMS ARE, AS THE MAJOR ROUTE OF EXPOSURE IS INGESTION OF WATER. TOXINS ARE NOT ABSORBED THROUGH THE SKIN, HOWEVER, THOSE WITH SKIN SENSITIVITIES MAY GET A PUFFY RED RASH. THE OREGON HEALTH AUTHORITY ENCOURAGES PEOPLE TO VISIT THE AREA AND ENJOY ACTIVITIES SUCH AS FISHING, CAMPING, HIKING, BILKING, PICNICKING, BIRD WATCHING, CANOEING, AND KAYAKING. BOATING IS SAFE AS LONG AS SPEEDS DO NOT CREATE EXCESSIVE WATER SPRAY. SPRAYS COULD LEAD TO THE RISK OF INHALING CYANOTOXINS.DO NOT DRINK THE WATER.
  • A RECREATIONAL USE HEALTH ADVISORY HAS BEEN EXPANDED FOR THE AREA FROM THE ROSS ISLAND LAGOON TO RIVERPLACE MARINA IN MULTNOMAH COUNTY DUE TO THE PRESENCE OF A CYANOBACTERIA BLOOM. PEOPLE SHOULD AVOID SWIMMING AND HIGH SPEED WATER ACTIVITIES, SUCH AS WATER SKIING OR POWER BOATING, IN AREAS OF THE LAKE AND SLOUGH WHERE BLOOMS ARE, AS THE MAJOR ROUTE OF EXPOSURE IS INGESTION OF WATER. TOXINS ARE NOT ABSORBED THROUGH THE SKIN, HOWEVER, THOSE WITH SKIN SENSITIVITIES MAY GET A PUFFY RED RASH. THE OREGON HEALTH AUTHORITY ENCOURAGES PEOPLE TO VISIT THE AREA AND ENJOY ACTIVITIES SUCH AS CATCH AND RELEASE FISHING, CAMPING, HIKING, BILKING, PICNICKING, BIRD WATCHING, CANOEING, AND KAYAKING. BOATING IS SAFE AS LONG AS SPEEDS DO NOT CREATE EXCESSIVE WATER SPRAY. SPRAYS COULD LEAD TO THE RISK OF INHALING CYANOTOXINS. DRINKING WATER FROM THE LAKE IS ESPECIALLY DANGEROUS.
  • A RECREATIONAL USE HEALTH ADVISORY IS IN EFFECT FOR THE WILLAMETTE RIVER FROM ROSS ISLAND DOWNSTREAM (NORTH) TO THE AREA NEAR CATHEDRAL PARK IN PORTLAND, IN MULTNOMAH COUNTY DUE TO THE PRESENCE OF A CYANOBACTERIA BLOOM. PEOPLE SHOULD AVOID SWIMMING AND HIGH SPEED WATER ACTIVITIES, SUCH AS WATER SKIING OR POWER BOATING, IN AREAS OF THE LAKE AND SLOUGH WHERE BLOOMS ARE, AS THE MAJOR ROUTE OF EXPOSURE IS INGESTION OF WATER. TOXINS ARE NOT ABSORBED THROUGH THE SKIN, HOWEVER, THOSE WITH SKIN SENSITIVITIES MAY GET A PUFFY RED RASH. THE OREGON HEALTH AUTHORITY ENCOURAGES PEOPLE TO VISIT THE AREA AND ENJOY ACTIVITIES SUCH AS FISHING, CAMPING, HIKING, BILKING, PICNICKING, BIRD WATCHING, CANOEING, AND KAYAKING. BOATING IS SAFE AS LONG AS SPEEDS DO NOT CREATE EXCESSIVE WATER SPRAY. SPRAYS COULD LEAD TO THE RISK OF INHALING CYANOTOXINS.DO NOT DRINK THE WATER.
  • A RECREATIONAL USE HEALTH ADVISORY ICONTINUES IN EFFECT FOR ARRONS LAKE, BUT HAS BEEN LIFTED FOR PETE’S SLOUGH AND STURGEON LAKE ON SAUVIE ISLAND DUE TO THE PRESENCE OF A CYANOBACTERIA BLOOM. PEOPLE SHOULD AVOID SWIMMING AND HIGH SPEED WATER ACTIVITIES, SUCH AS WATER SKIING OR POWER BOATING, IN AREAS OF THE LAKE AND SLOUGH WHERE BLOOMS ARE, AS THE MAJOR ROUTE OF EXPOSURE IS INGESTION OF WATER. TOXINS ARE NOT ABSORBED THROUGH THE SKIN, HOWEVER, THOSE WITH SKIN SENSITIVITIES MAY GET A PUFFY RED RASH. THE OREGON HEALTH AUTHORITY ENCOURAGES PEOPLE TO VISIT THE AREA AND ENJOY ACTIVITIES SUCH AS FISHING, CAMPING, HIKING, BILKING, PICNICKING, BIRD WATCHING, CANOEING, AND KAYAKING. BOATING IS SAFE AS LONG AS SPEEDS DO NOT CREATE EXCESSIVE WATER SPRAY. SPRAYS COULD LEAD TO THE RISK OF INHALING CYANOTOXINS.
  • A RECREATIONAL USE HEALTH ADVISORY IS IN EFFECT FOR AGENCY LAKE AND EXTENDED THE ADVISORY FOR THE SOUTHERN PORTION OF UPPER KLAMATH LAKE, FROM HOWARD’S BAY SOUTH TO THE LINK RIVER DAM  IN KLAMATH COUNTY DUE TO THE PRESENCE OF A CYANOBACTERIA BLOOM. PEOPLE SHOULD AVOID SWIMMING AND HIGH SPEED WATER ACTIVITIES, SUCH AS WATER SKIING OR POWER BOATING, IN AREAS OF THE RESERVOIR WHERE BLOOMS ARE, AS THE MAJOR ROUTE OF EXPOSURE IS INGESTION OF WATER. TOXINS ARE NOT ABSORBED THROUGH THE SKIN, HOWEVER, THOSE WITH SKIN SENSITIVITIES MAY GET A PUFFY RED RASH. THE OREGON HEALTH AUTHORITY ENCOURAGES PEOPLE TO VISIT AND ENJOY ACTIVITIES SUCH AS FISHING, CAMPING, HIKING, BILKING, PICNICKING, BIRD WATCHING, CANOEING, AND KAYAKING. BOATING IS SAFE AS LONG AS SPEEDS DO NOT CREATE EXCESSIVE WATER SPRAY. SPRAYS 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.

THE WEATHER PATTERN

An Upper Level Low Pressure Trough continues sending marine air our way bringing more rain. The graphics for days 1-3  show the cold front that will move through Oregon northern California Thursday. The graphics for days 3-7    Sunday through Thursday show a frontal system that will move toward the Pacific Northwest from the north-northwest Next Thursday.

Note: LRAPA has delayed the Fall Outdoor Burning Season until October 15th.

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Forecast For The South Willamette Valley Including Eugene-Springfield:

  • Mostly cloudy with a good (50%) chance of showers tonight (under 0.10 in. of rain possible),
  • Mostly cloudy with a good (50%) chance of AM showers, showers likely (70%) and a bit cooler Friday afternoon (0.10 in. of rain possible), mostly cloudy with a good (50%) chance of evening showers, partly cloudy with a good (50%) chance of showers late Friday night (under 0.10 in. of rain possible),
  • Some AM clouds with a slight (20%) chance of showers, mostly sunny and a bit warmer Saturday afternoon, becoming mostly clear at night,
  • Some AM clouds, sunny Sunday, then partly cloudy Sunday night.
  • lows 52-42 warming to 44 Sunday night highs 62-68.
  • A mix of clouds and sun with a slight (20%) chance of showers and a bit warmer Monday afternoon, mostly cloudy with a good (50%) chance of showers Monday night,
  • A mix of clouds and sun and a bit warmer with a (40%) chance of showers Tuesday, partly cloudy with a slight (20%) chance of showers at night,
  • Partly cloudy and a bit warmer Wednesday, partly cloudy Wednesday night,
  • Then mostly sunny and a bit warmer Thursday.
  • highs 69-75 lows 52-49. (seasonal averages high 73 low 45)

Forecast for the Umpqua Valley including Roseburg:

  • Mostly cloudy with a (30%) chance of rain tonight (under 0.10 in. of rain possible),
  • Mostly cloudy with AM rain likely (70%), showers and a bit cooler Friday afternoon (0.10 in. of rain possible), evening showers likely (70%), a (40%) chance of showers late Friday night (under 0.10 in. of rain possible),
  • Partly cloudy and a bit warmer with a slight (20%) chance of showers Saturday, mostly clear at night,
  • Mostly sunny and a bit warmer Sunday, then mostly clear Sunday night.
  • lows 53-45 highs 65-70.
  • Partly cloudy start, mostly cloudy and a bit warmer Monday afternoon, mostly cloudy with a slight (20%) chance of evening showers, partly cloudy with a slight (20%) chance of showers late Monday night,
  • Partly cloudy and a bit warmer with a slight (20%) chance of showers Tuesday, mostly clear at night,
  • Then mostly sunny and a bit warmer Wednesday and Thursday, mostly clear Wednesday night.
  • highs 72-79 lows near 53. (seasonal averages high 75 low 49)

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

  • Mostly cloudy a (30%) chance of coastal rain tonight while a good (50%) chance of late evening rain and inland rain likely (70%), showers late tonight (under 0.10 in. of rain possible),
  • Mostly cloudy with AM rain likely (70%), coastal showers likely (70%) and a bit warmer Friday afternoon while inland showers Friday afternoon (0.10 in. of rain possible), a (40%) chance of showers Friday night while a (50%) chance of inland showers Friday night (under 0.10 in. of rain possible),
  • Some AM clouds, sunny and a bit warmer Saturday afternoon, mostly clear in the evening, partly cloudy late at night,
  • Sunny and a bit warmer Sunday, then partly cloudy Sunday night.
  • lows 52-47 warming to 49 Sunday night highs 67-69.
  • Partly cloudy and a bit warmer Monday, mostly cloudy with a slight (20%) chance of showers Monday night,
  • Partly cloudy with a slight (20%) chance of showers and a bit warmer Tuesday, just partly cloudy at night,
  • Then mostly sunny and a bit warmer Wednesday and Thursday, mostly clear Wednesday night.
  • highs 70-75 lows near 54. (seasonal averages high 66 low 49)

Forecast for the Northern Oregon Cascades including Willamette Pass:

  • Mostly cloudy with a good (50%) of evening showers, showers likely (70%) late tonight (under 0.10 in. of rain possible),
  • Mostly cloudy with showers and a bit cooler Friday (0.25 in. of rain possible), evening showers, a (0%) chance of showers late Friday night,
  • Clouds and sun with a good (50%) chance of AM showers, a mix of clouds and sun and a bit cooler with a slight (20%) chance of showers Saturday afternoon, partly cloudy with areas of frost late at night,
  • Areas of AM frost, mostly sunny and a bit warmer Sunday afternoon, then partly cloudy Sunday night.
  • snow level 8,000 ft. tonight and Friday, 7,000 ft. Friday night, 6,500 ft. Saturday, free air freezing level 8,000 ft. Saturday night and Sunday, then 11,000 ft. Sunday night.
  • lows 39-32 highs 52-47 warming to 54 Sunday.
  • A mix of clouds and sun and a bit warmer Monday, mostly cloudy with a (40%) chance of showers Monday night,
  • A mix of clouds and sun and a bit warmer with a slight (20%) chance of showers Tuesday, partly cloudy with a slight (20%) chance of evening showers, just partly cloudy at night,
  • Some AM clouds, mostly sunny and a bit warmer Wednesday afternoon, partly cloudy Wednesday night,
  • Then mostly sunny Thursday.
  • free air freezing level 12,000 ft. Monday, snow level above 8,000 ft. Monday night through Tuesday night, then free air freezing level 14,000 ft. Wednesday through Thursday.
  • highs 55-63 lows near 40.