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Tim Chuey Weather

by | Dec 11, 2023 | Weather

December 11, 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 WINTER WEATHER ADVISORY IS IN EFFECT UNTIL 1 AM TODAY FOR THE SOUTHERN BLUE MOUNTAINS OF OREGON.

HEALTH ADVISORIES

  • A PUBLIC HEALTH ADVISORY IS IN EFFECT FOR UNSAFE LEVELS OF FECAL BACTERIA IN OCEAN WATERS AT BEVERLY BEACH IN LINCOLN COUNTY. PEOPLE SHOULD AVOID DIRECT CONTACT WITH THE WATER IN THIS AREA UNTIL THE ADVISORY IS LIFTED. UNSAFE LEVELS OF FECAL BACTERIA CAN CAUSE DIARRHEA, STOMACH CRAMPS, SKIN RASHES, UPPER RESPIRATORY INFECTIONS AND OTHER ILLNESSES. CHILDREN, THE ELDERLY, AND THOSE WITH A COMPROMISED IMMUNE SYSTEM SHOULD USE EXTRA CAUTION AS THEY ARE MORE VULNERABLE TO TO ILLNESSES FROM WATERBORNE BACTERIA. VISITORS SHOULD AVOID WADING IN NEARBY CREEKS, POLS OF WATER ON THE BEACH, OR IN DISCOLORED WATER, AND STAY CLEAR OF WATER RUNOFF FLOWING INTO THE OCEAN.
  • 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 CONTINUES 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

Frontal systems are moving through Oregon bringing rain and they will be pushed by Atmospheric Rivers. The graphics for days 1-3  show a complex frontal system slowly pushing through the Pacific Northwest Sunday. The graphics for days 3-7   Thursday through Monday show frontal systems sliding through or near Oregon through the period.

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Forecast For The South Willamette Valley Including Eugene-Springfield:

  • Mostly cloudy with patchy AM fog and a slight (20%) chance of showers (under 0.10 in. of rain possible), just mostly cloudy and slightly warmer with possible sun breaks this afternoon, mostly cloudy with patchy fog tonight,
  • Mostly cloudy start, partly cloudy and a bit cooler Tuesday afternoon and evening, mostly cloudy late at night,
  • Mostly cloudy with a slight (20%) chance of AM rain, a bit warmer with rain likely (70%) Wednesday afternoon and evening, then cloudy late Wednesday night.
  • highs 53-50 warming to 52 Wednesday lows 39-36 warming to 42 Wednesday night.
  • Mostly cloudy with a (40%) chance of Thursday, a slight (20%) chance of rain Thursday night,
  • Mostly cloudy Friday, mostly cloudy at night,
  • A mix of clouds and sun with a slight (20%) chance of rain Saturday, partly cloudy in the evening, mostly cloudy late Saturday night,
  • Clouds and sun with a slight (20%) chance of AM rain, then a (30%) chance of rain and a bit cooler Sunday afternoon.
  • highs 52-49 lows 40-36. (seasonal averages high 47 low 34)

Forecast for the Umpqua Valley including Roseburg:

  • Patchy AM fog, mostly cloudy and slightly warmer with a (40%) chance of showers this afternoon (under 0.10 in. of rain possible), mostly cloudy with patchy fog late tonight,
  • Mostly cloudy with patchy AM fog, sunny Tuesday afternoon, becoming mostly cloudy late at night,
  • Mostly cloudy with a slight (20%) chance of rain Wednesday afternoon and Wednesday night.
  • highs near 52 lows 42-39 warming to 43 Wednesday night.
  • Mostly cloudy with a (30%) chance of rain Thursday, a slight (20%) chance of evening rain, just mostly cloudy Thursday night,
  • Mostly cloudy Friday and at night,
  • Partly cloudy with a slight (20%) chance of rain Friday, a slight (20%) chance of rain Friday night,
  • Then mostly cloudy with a slight (20%) chance of rain Sunday.
  • highs near 53 lows 42-38. (seasonal averages high 48 low 37)

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

  • Mostly cloudy and a bit warmer with a (40%) chance of showers today (under 0.10 in. of rain possible), partly cloudy with patchy fog late tonight,
  • Partly cloudy with patchy AM inland fog, sunny and a bit warmer Tuesday afternoon, mostly cloudy at night,
  • Mostly cloudy and a bit cooler with a (40%) chance of rain Wednesday afternoon, then rain likely (70%) Wednesday night.
  • highs 58-62 cooling to 59 Wednesday lows 42-45.
  • Mostly cloudy with a good (50%) chance of rain and a bit warmer Thursday, a (30%) chance of rain Thursday night,
  • Mostly cloudy  with a slight (20%) chance of rain Friday and at night,
  • Partly cloudy with a slight (20%) chance of rain Saturday, a slight (20%) chance of rain Saturday night,
  • Partly cloudy with a (30%) chance of AM rain, then mostly cloudy with a (30%) chance of rain Sunday afternoon.
  • highs near 62 lows 44-42. (seasonal averages high 53 low 40)

Forecast for the Northern Oregon Cascades including Willamette Pass:

  • Clouds and sun with good (50%) chance of AM showers, a mix of clouds and sun and slightly warmer with a slight (20%) chance of showers this afternoon (under 0.10 in. of rain possible), partly cloudy with a slight (20%) chance of evening showers, just partly cloudy late tonight,
  • Some AM clouds, sunny and a bit cooler Tuesday, then partly cloudy at night,
  • A mix of clouds and sun with a good (50%) chance of rain and a bit warmer Wednesday afternoon, mostly cloudy with a good (50%) rain late Wednesday night.
  • snow level 5,500 ft. today, 4,500 ft. tonight, free air freezing level 8,000 ft. rising to 10,000 ft. Tuesday afternoon, 11,000 ft. falling to 10.000 ft. late Tuesday night, snow level 5,500 ft. Wednesday, then 6,000 ft. Wednesday night.
  • highs 40-39 warming to 42 Wednesday lows 27-29.
  • Mostly cloudy with a (40%) chance of rain Thursday, mostly cloudy with a slight (20%) chance of rain Thursday night,
  • A mix of clouds and sun with a slight (20%) chance of rain Friday afternoon, partly cloudy with a slight (20%) chance of rain  at night,
  • Some AM clouds, mostly sunny with a slight (20%) chance of rain Saturday afternoon, partly cloudy with a slight (20%) chance of rain Saturday night,
  • Partly cloudy with a slight (20%) chance of AM rain, then a (30%) chance of rain and a bit cooler Sunday afternoon.
  •  snow level 6,000 ft. Thursday, 6,500 ft. Thursday night and Friday, 6,000 ft. Friday night, 5,500 ft. Saturday, then 6,000 ft. Saturday night and Sunday.
  • highs 42-44 lows near 29.