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October 2, 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 BEACH HAZARDS STATEMENT IS IN EFFECT FOR DANGEROUS SNEAKER WAVES FROM THIS MORNING THROUGH THIS EVENING FOR THE SOUTH CENTRAL OREGON COAST AND THE CURRY COUNTY COAST.

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 Brings clouds with drizzle and showers. The graphics for days 1-3  show the cold front that will move through the Pacific Northwest today.  The graphics for days 3-7  Thursday through Monday show a frontal system that will try to move toward the Pacific Northwest from the northwest next Sunday and Monday.

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

Forecast For The South Willamette Valley Including Eugene-Springfield:

  • Mostly cloudy with a slight (20%) chance of AM rain, cooler with rain likely (70%) this afternoon (Quarter inch of rain possible), cloudy with evening rain likely (70%), a (30%) chance of showers late tonight (under 0.10 in. of rain possible),
  • Clouds and sun with patchy AM fog and a slight (20%) chance of showers, a mix of clouds and sun and a bit warmer Tuesday afternoon, mostly clear at night (under 0.10 in. of rain possible),
  • Mostly sunny and a bit warmer Wednesday, then mostly clear Wednesday night.
  • highs 60-72 lows 52-46 warming to 48 Wednesday night.
  • Mostly sunny and a bit warmer Thursday, clear Thursday night,
  • Sunny and a bit warmer Friday and Saturday, clear both nights,
  • Then mostly sunny and a bit cooler Sunday.
  • highs 76-79 cooling back to 76 Sunday lows near 50. (seasonal averages high 72 low 44)

Forecast for the Umpqua Valley including Roseburg:

  • Mostly cloudy with patchy AM fog, mostly cloudy and a bit warmer with a (30%) showers this afternoon, evening showers likely (70%), a slight (20%) chance of showers late tonight,
  • Mostly cloudy with a slight (20%) chance of AM showers, just partly cloudy and a bit warmer Tuesday afternoon, mostly clear at night,
  • Sunny and a bit warmer Wednesday, then clear Wednesday night.
  • highs 67-72 lows 54-49 warming  to 52 Wednesday night.
  • Sunny and a bit warmer Thursday, clear Thursday night,
  • Sunny Friday and Saturday, mostly clear both nights,
  • Then mostly sunny Sunday,
  • highs 78-85 lows 52-54. (seasonal averages high 74 low 48)

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

  • Patchy AM inland fog, mostly cloudy and a bit warmer with a (40%) chance of showers this afternoon, mostly cloudy with evening showers likely (70%), a good (50%) chance of showers late tonight,
  • Mostly cloudy start, partly cloudy and a bit warmer Tuesday afternoon, mostly clear at night,
  • Sunny and a bit warmer Wednesday, then clear Wednesday night.
  • highs 67-74 lows 54-52 warming back to 54 Wednesday night .
  • Sunny and a bit warmer Thursday, clear Thursday night,
  • Sunny and a bit cooler Friday, mostly clear at night,
  • Mostly sunny and a bit cooler Saturday, partly cloudy Saturday night,
  • Then partly cloudy and a bit cooler Sunday.
  • highs 80-72 lows 55-53. (seasonal averages high 65 low 49)

Forecast for the Northern Oregon Cascades including Willamette Pass:

  • A mix of clouds and sun with to start, becoming cloudy and cooler with a good (50%) chance of rain this afternoon (under 0.10 in. of rain possible), evening rain, showers likely (70%) likely (70%) late tonight,
  • Mostly cloudy with a slight (20%) chance of AM showers, partly cloudy and a bit warmer Tuesday afternoon, mostly clear at night,
  • Mostly sunny and warmer Wednesday, then clear Wednesday night.
  • free air freezing level 9,000 ft. rising to 12,000 ft. late tonight, snow level above 8,000 ft. Monday and Monday night, 12,000 ft.n rising to 13,000 ft. Tuesday afternoon, then 14,000 ft Tuesday night through Wednesday night.
  • highs 52-65 lows 40-37 warming to 42 Wednesday night.
  • Sunny and a bit warmer Thursday and Friday, clear both nights,
  • Sunny and a bit warmer Saturday, mostly clear Saturday night,
  • Then mostly sunny and a bit cooler Sunday.
  • free air freezing level 15,000 ft. Thursday through Friday night, 14,000 ft. Saturday, then 13,000 ft. Saturday night, and Sunday.
  • highs 68-72 cooling back to 68 Sunday lows near 45.