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Tim Chuey Weather

by | Dec 16, 2023 | Weather

December 16, 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 4 AM MONDAY FOR THE CENTRAL WILLAMETTE VALLEY AND THE SOUTH WILLAMETTE VALLEY.
  • A DENSE FOG ADVISORY IS IN EFFECT UNTIL NOON TODAY FOR THE CENTRAL WILLAMETTE VALLEY AND THE SOUTH WILLAMETTE VALLEY.
  • AN AIR STAGNATION ADVISORY IS IN EFFECT UNTIL 4 AM MONDAY FOR THE LOWER COLUMBIA.
  • *AN AIR STAGNATION ADVISORY IS IN EFFECT UNTIL 10 AM MONDAY FOR THE FOOTHILLS OF THE NORTHERN BLUE MOUNTAINS OF OREGON AND CENTRAL OREGON.
  • AN AIR STAGNATION ADVISORY IS IN EFFECT UNTIL 10 AM MONDAY FOR THE FOOTHILLS OF THE NORTHERN BLUE MOUNTAINS OF OREGON AND CENTRAL OREGON.
  • AN AIR STAGNATION ADVISORY IS IN EFFECT UNTIL 10 AM MONDAY FOR THE LOWER COLUMBIA BASIN OF OREGON, WALLOWA COUNTY, THE JOHN DAY BASIN, THE FOOTHILLS OF THE SOUTHERN BLUE MOUNTAINS OF OREGON, AND NORTH CENTRAL OREGON.
  • AN AIR STAGNATION ADVISORY IS IN EFFECT UNTIL 10 AM MONDAY FOR THE SOUTH CENTRAL OREGON COAST, THE CURRY COUNTY COAST, CENTRAL DOUGLAS COUNTY, EASTERN CURRY COUNTY AND JOSEPHINE COUNTY, AND  EASTERN DOUGLAS COUNTY FOOTHILLS.
  • AN AIR STAGNATION ADVISORY IS IN EFFECT UNTIL 10 AM MONDAY FOR NORTH CENTRAL OREGON.
  • AN AIR STAGNATION ADVISORY IS IN EFFECT UNTIL 11 PM MST MONDAY FOR HARNEY COUNTY, BAKER COUNTY, MALHEUR COUNTY, AND
  • A DENSE FOG ADVISORY IS IN EFFECT UNTIL NOON MST TODAY FOR THE OREGON LOWER TREASURE VALLEY.
  • AN AIR STAGNATION ADVISORY IS IN EFFECT UNTIL NOON MST SUNDAY FOR THE OREGON LOWER TREASURE VALLEY.
  • A WIND ADVISORY IS IN EFFECT FROM 4 PM MONDAY  UNTIL 7 AM TUESDAY FOR NORTHERN AND EASTERN KLAMATH COUNTY, AND WESTERN, CENTRAL, AND EASTERN LAKE COUNTY.
  • A WIND ADVISORY IS IN EFFECT FROM 10 AM MONDAY UNTIL 1 AM TUESDAY FOR JACKSON COUNTY.
  • AN AIR STAGNATION ADVISORY IS IN EFFECT  UNTIL 10 AM MONDAY FOR JACKSON COUNTY.

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. An Upper Level High Pressure Ridge (“Arch” shape) is trying to hold off the cold fronts. The graphics for days 1-3  show a front off the California coast . The graphics for days 3-7    Wednesday through Sunday show active frontal systems moving through the Eastern Pacific region and into the Pacific Northwest.

Note: The Winter Solstice occurs at 7:27 pm this Thursday December 21st as the official beginning of astronomical Winter.

________________

Forecast For The South Willamette Valley Including Eugene-Springfield:

  • Mostly cloudy with areas of AM fog, mostly sunny and a bit warmer this afternoon mostly cloudy with a slight (20%) chance of rain tonight,
  • Mostly cloudy with rain and patchy fog and a bit warmer Monday (under 0.10 in. of rain possible), rain with patchy fog at night (0.10 in. of rain possible)
  • Mostly cloudy and a bit warmer with rain Tuesday, patchy fog in the afternoon, then a good (50%) chance of rain late Tuesday night.
  • highs 43-53 lows 37-44.
  • Clouds and sun with a slight (20%) chance of AM rain, a mix of clouds and sun and a bit cooler Wednesday afternoon, mostly cloudy with patchy fog late Wednesday night,
  • Mostly cloudy with patchy fog and a bit cooler with a slight (20%) chance of rain Thursday afternoon (Winter Solstice 7:27 PM), mostly cloudy with patchy fog and a slight (20%) chance of rain at night,
  • Patchy AM fog, mostly cloudy and a bit warmer with a good (50%) chance of rain Friday, a (50%) chance of rain Friday night,
  • Clouds and sun with patchy AM fog and a (30%) chance of rain, then a mix of clouds and sun and a bit cooler Saturday afternoon.
  • highs 50-46 warming back to 50 Friday cooling to 47 Saturday lows 42-38. (seasonal averages high 46 low 34)

Forecast for the Umpqua Valley including Roseburg:

  • Patchy AM fog, mostly cloudy with a slight (20%) chance of rain and a bit warmer this afternoon, a (40%) chance of rain tonight,
  • Cloudy and a bit warmer with a (30%) of rain Monday and in the evening (under 0.10 in. of rain possible), then rain late at night (0.10 in. of rain possible),
  • Mostly cloudy with AM rain likely (70%), rain likely (70%) Tuesday afternoon, then a good (50%) chance of rain Tuesday night.
  • highs 53-55 lows 43-49 cooling back to 43 Tuesday night.
  • Mostly cloudy with a slight (20%) chance of AM rain, partly cloudy and a bit cooler with a slight (20%) chance of rain Wednesday afternoon, partly cloudy in the evening, just mostly cloudy late Wednesday night,
  • Mostly cloudy start, sunny Thursday afternoon (Winter Solstice 7:27 PM), partly cloudy with a slight (20%) chance of evening rain, mostly cloudy with a slight (20%) chance of rain late at night,
  • Mostly cloudy with a (30%) chance of rain and a bit cooler Friday, a (30%) chance of rain Friday night,
  • Then mostly cloudy and a bit cooler with a slight (20%) chance of rain Saturday.
  • highs 54-49 lows near 42 (seasonal averages high 48 low 36.

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

  • Mostly cloudy with a slight (20%) of rain today, a (40%) rain tonight (under 0.10 in. of rain possible),
  • Mostly cloudy with AM coastal rain and coastal rain likely (70%) and a bit cooler this afternoon while inland rain likely (70%) and a bit cooler Monday (under 0.10 in. of rain possible), rain (0.25 in. of rain possible) and windy at night (Coastal Wind: S 20-30 mph) while Inland Wind: S 20-30 mph decreasing to S 10-20 mph late at night,
  • Mostly cloudy with showers and a slight (20%) chance of thunderstorms and a bit cooler Tuesday, then a good (50%) chance of rain Tuesday night.
  • highs 62-55 lows 47-52 cooling to 48 Tuesday night.
  • Mostly cloudy with a slight (20%) chance of AM rain, partly cloudy and a bit warmer with a slight (20%) chance of rain Wednesday afternoon, partly cloudy Wednesday night,
  • Partly cloudy and a bit cooler with a slight (20%) chance of rain Thursday afternoon (Winter Solstice 7:27 PM), partly cloudy with a slight (20%) chance of evening rain, mostly cloudy with a slight (20%) chance of rain late at night,
  • Mostly cloudy and a bit cooler with a (40%) chance of rain Friday, a good (50%) chance of rain Friday night,
  • Then mostly cloudy and a bit cooler with a (30%) chance of rain Saturday.
  • highs 62-56 lows near 42. (seasonal averages high 53 low 40)

Forecast for the Northern Oregon Cascades including Willamette Pass:

  • A mix of clouds and sun with a slight (20%) chance of rain and a bit warmer this afternoon, mostly cloudy with a (40%) chance of rain tonight,
  • Mostly cloudy and a bit cooler with rain Monday, rain at night,
  • Mostly cloudy with rain and a bit warmer Tuesday, evening rain likely (70%) with a slight (20%) chance of snow, then a good (50%) chance of rain and snow late Tuesday night.
  • snow level 7,500 ft. today, 8,000 ft. tonight, 7,000 ft. Monday and Monday night, 6,500 ft. Tuesday, then 6,000 ft. Tuesday night.
  • highs 46-40 warming to 42 Tuesday lows 33-36 cooling to 32 Tuesday night.
  • A mix of clouds and sun with a (30%) chance of rain and snow and a bit warmer Wednesday, partly cloudy Wednesday night,
  • Partly cloudy with a slight (20%) chance of rain a bit warmer Thursday afternoon (Winter Solstice 7:27 PM), partly cloudy at night,
  • A mix of clouds and sun and a bit cooler with a good (50%) chance of rain and snow Friday, mostly cloudy with good (50%) chance of rain and snow Friday night,
  • Then a mix of clouds and sun and a bit cooler with a (40%) chance of rain and snow Saturday.
  • snow level  5,500 ft. Wednesday, free air freezing level 9,000 ft. Thursday and Thursday night, 5,500 ft. Friday, 5,000 ft. Friday night, then 4,000 ft. Saturday.
  • highs 44-46 cooling to 36 Saturday lows 30-27.