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Tim Chuey Weather

by | Aug 30, 2023 | Weather

August 31, 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

  • AN AIR QUALITY ALERT IS IN EFFECT UNTIL NOON TODAY FOR JOSEPHINE COUNTY AND KLAMATH COUNTY.
  • AN AIR QUALITY ADVISORY IS IN EFFECT UNTIL NOON TODAY FOR WILDFIRE SMOKE FOR DESCHUTES COUNTY.

HEALTH ADVISORIES

  • 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 and surface cold front will finally bring some rain to the Pacific Northwest. The precipitation should decrease the intensity of the wildfire smoke which can still push into the Pacific Northwest from various areas depending on the wind direction. The graphics for days 1-3  show a frontal system that’s moving through Oregon. The graphics for days 3-7   Sunday through Thursday show frontal activity Monday and Wednesday through Thursday.

Forecast For The South Willamette Valley Including Eugene-Springfield:

  • Mostly cloudy with AM rain, cooler with showers and patchy fog this afternoon (0.25 in.of rain possible), evening showers likely (70%), a (30%) chance of showers late tonight (under 0.10 in. of rain possible),
  • A mix of clouds and sun and warmer with a good (50%) chance of showers Friday (under 0.10 in. of rain possible), partly cloudy with a slight (20%) chance of showers at night (under 0.10 in. of rain possible),
  • Clouds and sun with a slight (20%) chance of AM showers, a mix of clouds and sun and a bit warmer with a good (50%) chance of showers and a slight (20%) chance of thunderstorms Saturday afternoon, mostly cloudy with a good (50%) chance of evening showers, then partly cloudy with a good (50%) chance of showers late Saturday night.
  • highs 68-82 lows near 57.
  • Mostly cloudy and a bit cooler with a good (50%) chance of showers Sunday, partly cloudy with a (40%) chance of showers Sunday night,
  • Clouds and sun with a (30%) chance of AM showers, a mix of clouds and sun and a bit cooler with a slight (20%) chance of showers Monday afternoon (Labor Day), just partly cloudy at night,
  • Then partly cloudy and a bit warmer Tuesday and Wednesday, partly cloudy Tuesday night.
  • highs 75-73 warming to 78 Wednesday lows 54-50 warming to 52 Tuesday night.  (seasonal averages high 82 low 50)

Forecast for the Umpqua Valley including Roseburg:

  • Mostly cloudy and hazy with AM rain likely (70%), hazy and cooler with showers this afternoon, showers tonight (under 0.10 in. of rain possible),
  • Mostly cloudy with scattered AM showers likely (70%), showers likely (70%) and a bit warmer with isolated thunderstorms Friday afternoon (under 0.10 in. of rain possible), a (30%) chance of evening scattered showers, partly cloudy with a (30%) chance of isolated showers late at night (under 0.10 in. of rain possible),
  • Mostly cloudy with scattered AM showers, a bit warmer with showers and isolated thunderstorms Saturday afternoon, mostly cloudy with scattered evening showers, showers and isolated thunderstorms late Saturday night.
  • highs 72-80 lows 59.
  • Mostly cloudy with a slight (20%) chance showers Sunday and Sunday night,
  • Mostly cloudy with a slight (20%) chance of AM showers, just partly cloudy and a bit cooler Monday afternoon (Labor Day), becoming mostly clear Monday night,
  • Mostly sunny and a bit warmer Tuesday, mostly clear Tuesday night,
  • Then mostly sunny Wednesday.
  • highs 80-77 warming back to 80 Wednesday lows 59-54. (seasonal averages high 84 low 55)

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

  • Patchy dense AM coastal fog and mostly cloudy with coastal rain today while patchy AM inland fog and inland rain likely (70%) and a bit cooler Thursday (0.10 in. of rain possible), evening showers likely (70%), scattered showers likely (70%) late tonight (under 0.10 in. of rain possible),
  • Mostly cloudy with scattered showers Friday (under 0.10 in. of rain possible), partly cloudy with a (30%) chance of scattered evening coastal showers and mostly cloudy a (30%) chance of isolated coastal showers at night while a (30%) chance of inland evening showers and a (30%) chance of isolated inland showers late at night (under 0.10 in. of rain possible),
  • Mostly cloudy with scattered showers Saturday and in the evening, then isolated showers late Saturday night.
  •  highs near 73 lows 58-56 warming back to 58 Saturday night.
  • Mostly cloudy with a slight (20%) chance of showers Sunday, a slight (20%) chance of showers Sunday night,
  • Partly cloudy with a slight (20%) of showers Monday (Labor Day), just partly cloudy at night,
  • Sunny Tuesday and Wednesday, partly cloudy Tuesday night.
  •  highs near 73 lows near 55. (seasonal averages high 68 low 53)

Forecast for the Northern Oregon Cascades including Willamette Pass:

  • Mostly cloudy with showers and a bit cooler today with patchy afternoon fog (0.50 in. of rain possible), showers with patchy fog late  tonight (0.25 in. of rain possible),
  • Patchy AM fog, mostly cloudy with showers and a slight (20%) chance of thunderstorms Friday, mostly cloudy with a good (50%) chance of evening showers and a slight (20%) chance of thunderstorms, then mostly cloudy with a slight (20%) chance of showers late at night,
  • Clouds and sun with a slight (20%) chance of AM showers, a mix of clouds and sun and a bit warmer with a good (50%) chance of showers and a slight (20%) chance of thunderstorms Saturday afternoon, mostly cloudy with a (40%) chance of evening showers and a slight (20%) chance of thunderstorms, then a slight (20%) chance of showers late Saturday night.
  • snow level above 8,000 ft. today through Saturday night.
  • highs 57-62 lows near 44.
  • A mix of clouds and sun with a (40%) chance of showers Sunday and in the evening, a slight (20%) chance of showers late Sunday night,
  • A mix of clouds and sun with a slight (20%) chance of showers Monday (Labor Day), just partly cloudy at night,
  • Some AM clouds, mostly sunny and a bit warmer Tuesday afternoon, partly cloudy Tuesday night,
  • Some AM clouds, then mostly sunny Wednesday afternoon.
  • snow level above 8,000 ft. Sunday through Monday, then free air freezing level 13,000 ft. Monday night, 14,000 ft. Tuesday, 13,000 ft. Tuesday night, then 12,000 ft. Wednesday.
  • highs 62-67 lows 42-40 warming back to 42 Tuesday night.