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Tim Chuey Weather

by | Dec 12, 2023 | Weather

December 13, 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 11 PM MST FRIDAY FOR HARNEY COUNTY, BAKER COUNTY, MALHEUR COUNTY, AND THE OREGON LOWER TREASURE VALLEY.
  • A DENSE FOG ADVISORY IS IN EFFECT UNTIL NOON TODAY FOR THE FOOTHILLS OF THE SOUTHERN BLUE MOUNTAINS OF OREGON AND NORTH 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 Thursday. The graphics for days 3-7   Saturday through Wednesday show a frontal system sliding through or near Oregon next Tuesday and Wednesday.

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Forecast For The South Willamette Valley Including Eugene-Springfield:

  • Patchy dense AM fog, mostly cloudy with possible sun breaks this afternoon, cloudy with patchy fog and a good (50%) chance of rain tonight,
  • Patchy AM fog, cloudy with a good (50%) chance of rain and a bit warmer Thursday, a slight (20%) chance of evening rain, just mostly cloudy with patchy fog late at night,
  • Patchy AM fog, mostly cloudy and a bit cooler Friday afternoon, then mostly cloudy with patchy fog Friday night.
  • highs 50-53 cooling to 49 Friday night lows 40-35 .
  • A mix of clouds and sun Saturday, partly cloudy with patchy evening fog with a slight (20%) chance of rain, mostly cloudy with a slight (20%) chance of rain late Saturday night,
  • Mostly cloudy with a good (50%) chance of rain Sunday and in the evening, rain likely (70%) late at night,
  • Mostly cloudy and a bit warmer with rain likely (70%) Monday and Monday night,
  • Then mostly cloudy and a bit warmer with rain likely (70%) Tuesday.
  • highs 49-54 lows 36-43. (seasonal averages high 47 low 34)

Forecast for the Umpqua Valley including Roseburg:

  • Patchy AM fog, mostly cloudy and a bit cooler this afternoon, a (30%) chance of rain late tonight,
  • Mostly cloudy and a bit warmer with a (30%) chance of rain Thursday (under 0.10 in. of rain possible),  just mostly cloudy at night,
  • Then mostly cloudy and a bit cooler Friday and Friday night.
  • highs 49-54 cooling to 52 Friday lows 43-38.
  • Mostly cloudy start, partly cloudy and a bit warmer with a slight (20%) chance of rain Saturday afternoon, mostly cloudy with a slight (20%) chance of rain late Saturday night,
  • Mostly cloudy with rain likely (70%) Sunday and at night,
  • Then mostly cloudy with rain likely (70%) Monday through Tuesday.
  • highs near 54 lows 42-46. (seasonal averages high 48 low 37)

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

  • Mostly cloudy and a bit cooler today, mostly cloudy with a (30%) chance of evening coastal rain and coastal rain likely (70%) late tonight while a (30%) chance of inland rain Wednesday night (under 0.10 in. of rain possible),
  • Mostly cloudy with coastal rain likely (70%) while a good (50%) chance of inland rain and a bit warmer Thursday (under 0.10 in. of rain possible), patchy fog with a slight (20%) chance of evening coastal rain, patchy fog late at night,
  • Then mostly cloudy Friday and Friday night.
  • highs 55-62 lows 45-42.
  • Partly cloudy with a slight (20%) chance of AM rain, mostly cloudy with a slight (20%) chance of rain Saturday afternoon, a (40%) chance of rain  Saturday night,
  • Mostly cloudy with a good (50%) chance of AM rain, a bit cooler with rain likely (70%) Sunday afternoon, rain likely (70%) at night,
  • Mostly cloudy and a bit warmer with rain Monday, then rain likely (70%) Monday night and Tuesday.
  • highs 62-60 lows 44-47. (seasonal averages high 53 low 40)

Forecast for the Northern Oregon Cascades including Willamette Pass:

  • A mix of clouds and sun today, mostly cloudy with a slight (20%) rain tonight,
  • Mostly cloudy with a (40%) chance of AM rain and snow, a slight (20%) chance of rain Thursday afternoon, just partly cloudy at night,
  • A mix of clouds and sun and a bit warmer Friday, then partly cloudy Friday night.
  • free air freezing level 10,000 ft. rising to 11,000 ft. this afternoon, snow level 5,000 ft. tonight, 5,500 ft. Thursday, free air freezing level 9,000 ft. Thursday night, then 11,000 ft. Friday and Friday night.
  • highs 40-44 cooling to 42 Friday lows near 30.
  • Partly cloudy Saturday, a slight (20%) chance of evening rain, a (30%) chance of rain with a slight (20%) chance  of rain and snow late Saturday night,
  • Clouds and sun with a slight (20%) chance of AM rain and snow, a mix of clouds and sun with a good (50%) chance of rain and a bit cooler Sunday afternoon, rain and snow likely (70%) at night,
  • Mostly cloudy with AM rain and snow likely (70%), rain likely (70%) Monday afternoon, rain and snow likely (70%) Monday night,
  • Then mostly cloudy and a bit warmer with rain and snow likely (70%) Tuesday.
  • free air freezing level 11,000 ft. Saturday, snow level 6,500 ft. Saturday night, 7,000 ft. Sunday, 6,500 ft. Sunday night through Monday night, then 6,000 ft. Tuesday.
  • highs 45-39 lows near 32.