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Tim Chuey Weather

by | Aug 31, 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 FRIDAY FOR DOUGLAS COUNTY AND JOSEPHINE COUNTY.
  • AN AIR QUALITY ADVISORY IS IN EFFECT UNTIL NOON FRIDAY FOR MULTNOMAH 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 Sunday and Monday, then Wednesday and Thursday.

Forecast For The South Willamette Valley Including Eugene-Springfield:

  • Cloudy with evening showers likely (70%), a (30%) chance of showers late tonight (0.25 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 Friday night (under 0.10 in. of rain possible),
  • Partly cloudy with a slight (20%) chance of AM showers, partly cloudy with a good (50%) chance of showers and a slight (20%) chance of thunderstorms Saturday afternoon (under 0.10 in. of rain possible), mostly cloudy with a good (50%) chance of evening showers and a slight (20%) chance of thunderstorms, a good (50%) chance of showers late at night (under 0.10 in. of rain possible),
  • Mostly cloudy with a (40%) chance of AM showers, a bit cooler with showers likely (70%) Sunday afternoon, then mostly cloudy with a (30%) chance of showers Sunday night.
  • lows 59-56 highs 82-75.
  • Clouds and sun with a (40%) chance of AM showers, a mix of clouds and sun with a slight (20%) chance of showers Monday afternoon (Labor Day), just partly cloudy Monday night,
  • Mostly sunny and a bit warmer Tuesday, mostly clear at night,
  • Partly cloudy Wednesday, mostly clear Wednesday night,
  • Mostly sunny start, then partly cloudy and a bit warmer Thursday afternoon.
  • highs 75-79 lows near 52 (seasonal averages high 82 low 50)

Forecast for the Umpqua Valley including Roseburg:

  • Mostly cloudy with evening showers, scattered showers late tonight (0.10 in. of rain possible),
  • Mostly cloudy and warmer with a (40%) chance of isolated showers and isolated thunderstorms Friday (under 0.10 in. of rain possible), a (30%) chance of evening scattered showers and isolated thunderstorms, a (40%) chance of scattered showers late Friday night (under 0.10 in. of rain possible),
  • Mostly cloudy with a good (50%) chance of AM showers, a bit warmer with showers likely (70%) and a slight (20%) chance of thunderstorms Saturday afternoon and evening (0.10 in. of rain possible), a slight (20%) chance of showers late Saturday night (under 0.10 in. of rain possible),
  • Then mostly cloudy and a bit cooler with a good (50%) chance showers Sunday and Sunday night.
  • lows 59-57 warming back to 59 Sunday night highs 73-75 cooling back to 73 Sunday.
  • Mostly cloudy with a slight (20%) chance of AM showers, mostly sunny with a slight (20%) chance of showers Monday afternoon (Labor Day), becoming mostly clear Monday night,
  • Mostly sunny and a bit warmer Tuesday, mostly clear Tuesday night,
  • Then mostly sunny Wednesday and Thursday, mostly clear Wednesday night.
  • highs near 75 lows near 54. (seasonal averages high 84 low 55)

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

  • Mostly cloudy with a (30%) chance of scattered showers tonight (under 0.10 in. of rain possible),
  • Mostly cloudy and a bit warmer with scattered showers Friday and in the evening (under 0.10 in. of rain possible), a (30%) chance of isolated showers late Friday night (under 0.10 in. of rain possible),
  • Mostly cloudy with a good (50%) chance of coastal showers and a bit warmer Saturday while a good (50%) chance of AM inland showers and inland showers likely (70%) in the afternoon (under 0.10 in. of rain possible), mostly cloudy with a (30%) chance of showers late at night,
  • Mostly cloudy and a bit cooler with a good (50%) chance of showers Sunday, then showers likely (70%) Sunday night.
  • lows 59-57 warming to 58 Sunday night highs 73-75 cooling back to 73 Sunday.
  • Partly cloudy with a (30%) of AM showers, mostly sunny and a bit warmer with a (30%) of showers Monday afternoon (Labor Day), just mostly clear Monday night,
  • Mostly sunny Tuesday, mostly clear at night,
  • Mostly sunny Wednesday, mostly clear in the evening, partly cloudy late Wednesday night,
  • Then sunny Thursday.
  •  highs near 75 lows near 54. (seasonal averages high 68 low 53)

Forecast for the Northern Oregon Cascades including Willamette Pass:

  • Mostly cloudy with showers likely (70%) and areas of smoke (0.25 in. of rain possible),
  • Mostly cloudy with showers and a slight (20%) chance of thunderstorms Friday (0.10 in. of rain possible, more in storms), mostly cloudy with a good (50%) chance of evening showers and a slight (20%) chance of thunderstorms, then partly cloudy with a slight (20%) chance of showers and thunderstorms late Friday night (under 0.10 in. of rain possible, more in storms),
  • Mostly cloudy with a good (50%) chance of AM showers,  a bit warmer with showers likely (70%) and a slight (20%) chance of thunderstorms Saturday afternoon, mostly cloudy with evening showers likely (70%) and a slight (20%) chance of thunderstorms, a slight (20%) chance of showers late at night,
  • Mostly cloudy and a bit cooler with a good (50%) chance of showers Sunday and Sunday night.
  • snow level above 8,000 ft. today through Sunday night.
  • lows near 44 highs 60-64 cooling to 59 Sunday.
  • A mix of clouds and sun with a (40%) chance of AM showers, partly cloudy and a bit warmer with a slight (20%) chance of showers Monday (Labor Day), just partly cloudy Monday night,
  • Mostly sunny and a bit warmer Tuesday, mostly clear at night,
  • Mostly sunny and a bit cooler Wednesday and Wednesday night,
  • Then mostly sunny and a bit warmer Thursday.
  • snow level above 8,000 ft. tonight, then free air freezing level 13,000 ft. Monday through Thursday.
  • highs 62-70 cooling to 68 Wednesday warming back to 70 Thursday lows near 42.