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October 5, 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 High Pressure Ridge takes over with sunshine and warming temperatures. The graphics for days 1-3  show no frontal systems approaching the Pacific Northwest. The graphics for days 3-7  Sunday through Thursday show a frontal system that will move through the Pacific Northwest next Tuesday, then another way behind it next Wednesday.

Forecast For The South Willamette Valley Including Eugene-Springfield:

  • Some AM clouds and patchy fog, sunny and a bit warmer this afternoon, clear tonight,
  • Mostly sunny and a bit warmer Friday, clear at night,
  • Some AM clouds, sunny and a bit warmer Saturday afternoon, then mostly clear Saturday night.
  • highs 80-86 cooling to 82 Saturday lows near 52.
  • Partly cloudy and a bit cooler Sunday, mostly cloudy with a (40%) chance of rain late Sunday night,
  • Mostly cloudy with rain and a bit cooler Monday (Columbus Day/Indigenous Peoples’ Day), rain at night,
  • Mostly cloudy and a bit cooler with rain Tuesday, rain Tuesday night,
  • Then mostly cloudy and a bit cooler with rain likely (70%) Wednesday.
  • highs 76-64 lows 53-49. (seasonal averages high 70 low 44)

Forecast for the Umpqua Valley including Roseburg:

  • AM clouds and patchy fog, sunny and warmer today, clear tonight,
  • Patchy AM fog, sunny and a bit warmer Friday, clear with patchy fog late at night,
  • Patchy AM and late night fog, mostly sunny and a bit cooler Saturday afternoon, then mostly clear Saturday night.
  • highs 84-90 cooling to 86 Saturday lows 52-55.
  • Patchy AM fog, partly cloudy and a bit cooler Sunday, mostly cloudy with a (30%) chance of rain Sunday night,
  • Mostly cloudy with AM rain likely (70%), showers likely (70%) and cooler Monday afternoon (Columbus Day/Indigenous Peoples’ Day), rain at night,
  • Mostly cloudy with rain and a bit cooler Tuesday, rain likely (70%) Tuesday night,
  • Mostly cloudy with AM rain likely (70%), a good (50%) chance of rain and a bit warmer Wednesday afternoon.
  • highs 82-66 warming to 68 Wednesday lows 55-52. (seasonal averages high 72 low 48)

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

  • Patchy AM fog, sunny and warmer this afternoon, clear with patchy coastal fog late tonight,
  • Patchy AM coastal fog, sunny and a bit warmer Friday, clear in the evening, mostly cloudy with patchy fog late at night,
  • AM clouds with patchy fog, sunny and a bit cooler Saturday afternoon, partly cloudy in the evening, mostly cloudy with patchy fog and a slight (20%) chance of drizzle Saturday night.
  • highs 79-82 cooling to 75 Saturday lows 55-52.
  •  Patchy AM fog, mostly cloudy and a bit cooler with a slight (20%) chance of drizzle Sunday afternoon, mostly cloudy with a good (50%) chance of rain Sunday night,
  • Mostly cloudy with rain and a bit cooler Monday (Columbus Day/Indigenous Peoples’ Day), rain at night,
  • Mostly cloudy with rain and a bit cooler Tuesday, rain likely (70%) Tuesday night,
  • AM rain likely (70%), then a good (50%) chance of rain and a bit warmer Wednesday afternoon.
  • highs 70-67 warming to 69 Wednesday lows 55-52. (seasonal averages high 65 low 48)

Forecast for the Northern Oregon Cascades including Willamette Pass:

  • Sunny and a bit warmer today, clear tonight,
  • Sunny and a bit warmer Friday, clear at night,
  • Mostly sunny and a bit warmer Saturday, then clear Saturday night.
  • free air freezing level 14,000 ft. today, 15,000 ft. tonight and Friday, 15,000 ft. rising to 14,000 ft. Friday night, 14,000 ft. Saturday, then 13,000 ft. Saturday night.
  • highs 72-73 lows near 47.
  • Mostly sunny and a bit cooler Sunday, partly cloudy in the evening rain, mostly cloudy with a slight (20%) chance of rain late Sunday night,
  • Mostly cloudy with rain and a bit cooler Monday (Columbus Day/Indigenous Peoples’ Day), rain at night,
  • Mostly cloudy and cooler with rain Tuesday, rain Tuesday night,
  • Then mostly cloudy and a bit warmer with rain likely (70%) Wednesday.
  • free air freezing level 13,000 ft. Sunday, snow level above 8,000 ft. Sunday night through Monday night, then 7,500 ft. Tuesday through Wednesday.
  • highs 68-47 warming to 50 Wednesday lows near 46-36.