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Tim Chuey Weather

by | Dec 11, 2023 | Weather

December 12, 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 STAGNATION ADVISORY IS IN EFFECT UNTIL 8 PM MST THIS EVENING FOR HARNEY COUNTY, BAKER COUNTY, MALHEUR COUNTY, AND THE OREGON LOWER TREASURE VALLEY.
  • A DENSE FOG ADVISORY IS IN EFFECT UNTIL 10 AM TODAY FOR THE FOOTHILLS OF THE NORTHERN BLUE MOUNTAINS OF OREGON, THE FOOTHILLS OF THE SOUTHERN BLUE MOUNTAINS OF OREGON, NORTH CENTRAL OREGON, AND CENTRAL 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 brought rain pushed by Atmospheric Rivers. Now short-lived High Pressure drys us out for a couple days. The graphics for days 1-3  show a complex frontal system slowly pushing through the Pacific Northwest Sunday. The graphics for days 3-7   Friday through Tuesday show frontal systems sliding through or near Oregon through the period.

________________

Forecast For The South Willamette Valley Including Eugene-Springfield:

  • Some AM clouds with patchy fog, mostly sunny and a bit cooler this afternoon, partly cloudy this evening, mostly cloudy late tonight,
  • Mostly cloudy Wednesday, cloudy with a good (50%) chance of rain at night,
  • Mostly cloudy with a (40%) chance of AM rain, a slight (20%) chance of rain and a bit warmer Thursday afternoon and evening, then just mostly cloudy late Thursday night.
  • highs 52-54 lows 37-42 cooling to 39 Thursday night.
  • Mostly cloudy and a bit cooler Friday, mostly cloudy Friday night,
  • Partly cloudy Saturday and in the evening, mostly cloudy with a slight (20%) chance of rain late at night,
  • Mostly cloudy with a slight (20%) chance of AM rain, a (40%) chance of rain and a bit cooler Sunday afternoon, a good (50%) chance of rain Sunday night,
  • Mostly cloudy with a good (50%) chance of AM rain, then rain likely (70%) Monday afternoon.
  • highs 52-49 lows 36-39. (seasonal averages high 47 low 34)

Forecast for the Umpqua Valley including Roseburg:

  • AM clouds with  patchy AM fog, sunny and a bit cooler this afternoon, mostly clear with patchy evening fog, becoming mostly cloudy with patchy fog late tonight,
  • Patchy AM fog, mostly cloudy Wednesday, a slight (20%) chance of rain Wednesday night,
  • Mostly cloudy and a bit warmer with a slight (20%) chance of rain Thursday, a slight (20%) chance of evening rain, then just mostly cloudy Thursday night.
  • highs 50-53 lows 39-42 cooling to 40 Thursday night.
  • Mostly cloudy Friday and Friday night,
  • Partly cloudy and a bit warmer Saturday, partly cloudy with a slight (20%) evening rain, mostly cloudy with a slight (20%) chance of rain late at night,
  • Mostly cloudy and a bit cooler with a (30%) chance of rain Sunday, rain likely (70%) Sunday night,
  • Then mostly cloudy and a bit warmer with rain likely (70%) Monday.
  • highs near 53-54 cooling to 52 Sunday warming to 54 Monday lows 38-44. (seasonal averages high 48 low 37)

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

  • AM clouds with patchy fog, sunny and a bit warmer this afternoon, partly cloudy this evening, mostly cloudy with patchy fog late tonight,
  • Patchy AM fog, mostly cloudy Wednesday afternoon, cloudy with a (40%) chance of rain at night (0.10 in. of rain possible),
  • Mostly cloudy with a (30%) chance of rain and a bit warmer Thursday, a slight (20%) chance of evening rain, then just mostly cloudy Thursday night.
  • highs 56-62 lows 42-46 cooling back to 42 Thursday night.
  • Mostly cloudy Friday and Friday night,
  • Partly cloudy and a bit warmer with a slight (20%) chance of rain Saturday afternoon, partly cloudy with a slight (20%) chance of evening rain, mostly cloudy a (30%) chance of rain  Saturday night,
  • Mostly cloudy and a bit cooler with a (40%) chance of rain Sunday, rain likely (70%) Sunday night,
  • Then mostly cloudy and a bit warmer with rain likely (70%) Monday.
  • highs 62-60 warming back to 62 Monday lows 42-45. (seasonal averages high 53 low 40)

Forecast for the Northern Oregon Cascades including Willamette Pass:

  • Mostly sunny and a bit cooler today, partly cloudy tonight,
  • A mix of clouds and sun and a bit warmer Wednesday, mostly cloudy with a slight (20%) rain late at night,
  • Mostly cloudy with a slight (20%) chance of AM rain, just mostly cloudy Thursday afternoon, then mostly cloudy Thursday night.
  • free air freezing level 7,500 ft. rising to 10,000 ft. this afternoon, 10.000 ft. tonight, 11,000 ft. Wednesday, snow level 5,500 ft. Wednesday night, 6,000 ft. Thursday, then free air freezing level 9,000 ft. Thursday night.
  • highs 38-43 lows 26-29 Wednesday night and Thursday night.
  • A mix of clouds and sun and a bit cooler Friday, partly cloudy Friday night,
  • Some AM clouds, sunny and a bit warmer Saturday afternoon, partly cloudy with a slight (20%) chance of rain late at night,
  • Partly cloudy with a slight (20%) chance of AM snow, a mix of clouds and sun with a good (50%) chance of rain and a bit cooler Sunday afternoon, mostly cloudy with a good (50%) chance of rain and snow Sunday night,
  • Mostly cloudy with a good (50%) chance of AM rain and snow, then rain and snow likely (70%) and a bit cooler Monday afternoon.
  • free air freezing level 11,000 ft. Friday through Saturday, snow level 6,000 ft. Saturday night, 6,500 ft. Sunday and Sunday night, then 6,000 ft. Monday.
  • highs 42-45 cooling to 40 Monday lows 30-32.