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November 6, 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 WIND ADVISORY IS IN EFFECT FROM 7 AM UNTIL 10 PM TONIGHT FOR THE GREATER PORTLAND METRO AREA, THE CENTRAL WILLAMETTE VALLEY, AND THE SOUTH WILLAMETTE VALLEY.
  • A WIND ADVISORY IS IN EFFECT FROM 1 AM UNTIL 4 PM TODAY FOR NORTHERN AND EASTERN KLAMATH COUNTY, AND WESTERN, CENTRAL, AND EASTERN LAKE COUNTY.

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

  • Upper Level High Pressure (“Arch” shape) is now moving toward us. An atmospheric river is aimed at us bringing more rain. The graphics for days 1-3  show the a frontal system moving through the Pacific Northwest today with another following behind it. The graphics for days 3-7   Thursday through Monday show a complex frontal system will be pushing in between Thursday and Friday, and another complex frontal system will be offshore next Sunday.

Forecast For The South Willamette Valley Including Eugene-Springfield:

  • Mostly cloudy with showers and a slight (20%) chance of thunderstorms and a bit cooler today (0.50 in. of rain possible), showers with a slight (20%) chance of thunderstorms tonight (0.25 in. of rain possible, more in storms),
  • Mostly cloudy and a bit cooler with showers Tuesday (0.10 in. of rain possible), a good (50%) chance of evening showers, a slight (20%) chance of showers late at night,
  • Then partly cloudy Wednesday and Wednesday night.
  • highs 58-55 lows 46-36.
  • Mostly cloudy with a good (50%) chance of AM rain, rain and a bit cooler Thursday afternoon, showers Thursday night,
  • Mostly cloudy with showers and a bit warmer Friday, a good (50%) chance of showers at night,
  • Mostly cloudy with a good (50%) chance of AM rain, rain likely (70%) Saturday afternoon (Veterans Day), then rain likely (70%) Saturday night and Sunday.
  • highs 54-56 lows 42-40 warming to 43 Saturday night (seasonal averages high 56 low 39)

Forecast for the Umpqua Valley including Roseburg:

  • Mostly cloudy and a bit cooler with showers and a slight (20%) chance of thunderstorms today (0.25 in. of rain possible), showers with a slight (20%) chance of thunderstorms tonight (0.25 in. of rain possible),
  • Mostly cloudy with AM rain and a slight (20%) chance of thunderstorms, rain and a bit cooler Tuesday afternoon (0.10 in. of rain possible), a good (50%) chance of rain at night (under 0.10 in. of rain possible),
  • Partly cloudy and a bit warmer Wednesday, then partly cloudy Wednesday night.
  • highs 57-55 lows 46-38.
  • Mostly cloudy with a (40%) chance of rain Thursday, rain Thursday night,
  • Mostly cloudy with AM rain likely (70%), a good (50%) chance of rain and a bit cooler Friday afternoon, a (50%) chance of rain at night,
  • Mostly cloudy and a bit warmer with a (40%) chance of rain Saturday (Veterans Day), a good (50%) chance of rain Saturday night,
  • Then mostly cloudy with a good (50%) chance of rain Sunday.
  • highs 55-56 lows 42-44 (seasonal averages high 58 low 42)

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

  • Mostly cloudy and breezy (Wind: SW 15-25 mph gusts to 40 mph late morning into this afternoon) with showers and a good (50%) chance of thunderstorms and a bit cooler today (0.25 in. of rain possible), coastal showers with a slight (20%) chance of thunderstorms while inland evening showers and a slight (20%) chance of thunderstorms and inland rain late tonight (0.25 in. of rain possible),
  • Mostly cloudy with AM coastal showers and a slight (20%) chance of thunderstorms while inland rain with a slight (20%) chance of thunderstorms, rain Tuesday  afternoon (0.10 in. of rain possible), mostly cloudy with a (40%) chance of evening rain, partly cloudy with a (40%) chance of rain late at  night (under 0.10 in. of rain possible),
  • Partly cloudy Wednesday, then partly cloudy Wednesday night.
  • highs near 62 lows 58-42.
  • Mostly cloudy with AM rain likely (70%), rain Thursday afternoon, rain Thursday night,
  • Mostly cloudy with AM rain likely (70%), a bit cooler with a good (50%) chance of rain Friday afternoon, a good (50%) chance of rain at night,
  • Mostly cloudy and a bit warmer with rain likely (70%) Saturday (Veterans Day), rain likely (70%) Saturday night,
  • Then mostly cloudy and a bit warmer with rain likely (70%) Sunday.
  • highs 62-64 lows 45-47. (seasonal averages high 59 low 45)

Forecast for the Northern Oregon Cascades including Willamette Pass:

  • Mostly cloudy and a bit cooler with showers and a slight (20%) chance of thunderstorms today (0.50 in. of rain possible, more in storms), snow showers and showers with a slight (20%) chance of evening thunderstorms, showers late tonight (0.50 in. of rain possible, more in storms, 1-3 in. of snow possible),
  • Mostly cloudy with rain and snow showers and a bit cooler Tuesday, evening snow and rain showers likely (70%), partly cloudy with a good (50%) chance of rain and snow showers late at night,
  • Some AM clouds, sunny and a bit warmer Wednesday afternoon, then partly cloudy Wednesday night.
  • snow level 5,500 ft. today, 4,500 ft. tonight and Tuesday, 4,000 ft. Tuesday night, free air freezing level 6,500 ft.Wednesday, then 7,500 ft. Wednesday night.
  • highs 39-36 warming to 42 Wednesday lows 30-23 warming to 25 Wednesday night.
  • Mostly cloudy with slight (20%) chance of AM rain, rain with a (40%) chance of snow and the a bit warmer Thursday afternoon, rain and snow showers Thursday night,
  • Mostly cloudy and a bit cooler with rain and snow showers Friday, a good (50%) chance of rain and snow showers at night.
  • A mix of clouds and sun and a bit warmer with a good (50%) chance of rain and snow Saturday (Veterans Day) and Saturday night,
  • Then mostly cloudy with a good (50%) chance of rain and snow Sunday.
  • snow level 5,500 ft. Thursday and Thursday night, 4,500 ft. Friday and Friday night, then 5,500 ft. Saturday through Sunday night,
  • highs 43-37 warming to 42 Saturday and Sunday lows 28-26 warming to 30 Friday night.