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January 6, 2024

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 STORM WARNING IS IN EFFECT UNTIL 4 AM SUNDAY FOR THE NORTHERN OREGON CASCADES AND THE CASCADES IN LANE COUNTY.
  • A WINTER WEATHER ADVISORY IS IN EFFECT UNTIL 4 AM SUNDAY ABOVE 3,500 FT. FOR THE EAST SLOPES OF THE OREGON CASCADES.
  • A WINTER STORM WARNING IS IN EFFECT UNTIL 4 AM SUNDAY ABOVE 2,000 FT. FOR THE NORTHERN CASCADE FOOTHILLS OF OREGON AND THE CASCADE FOOTHILLS IN LANE COUNTY.
  • A WINTER WEATHER ADVISORY IS IN EFFECT UNTIL 10 PM TONIGHT FOR THE KLAMATH BASIN, NORTHERN AND EASTERN KLAMATH COUNTY, AND WESTERN, CENTRAL, AND EASTERN LAKE COUNTY.
  • A WINTER STORM WARNING IS IN EFFECT UNTIL 4 AM SUNDAY ABOVE 2,000 FT. FOR THE NORTHERN OREGON CASCADE FOOTHILLS AND THE  CASCADE FOOTHILLS IN LANE COUNTY.
  • A WINTER STORM WARNING IS IN EFFECT UNTIL 10 PM TODAY FOR THE SOUTH CENTRAL OREGON CASCADES, THE SISKIYOU MOUNTAINS, AND THE SOUTHERN OREGON CASCADES.
  • A WINTER STORM  WARNING IS IN EFFECT UNTIL 10 PM TONIGHT ABOVE 2,500 FT. FOR EASTERN CURRY COUNTY AND JOSEPHINE COUNTY, THE EASTERN DOUGLAS COUNTY FOOTHILLS, AND JACKSON COUNTY.
  • A WINTER WEATHER ADVISORY  IS IN EFFECT UNTIL 10 AM SUNDAY ABOVE 3,500 FT. FOR THE NORTHERN BLUE MOUNTAINS OF OREGON.
  • A BEACH HAZARDS STATEMENT FOR DANGEROUS SNEAKER WAVES IS IN EFFECT THROUGH SUNDAY AFTERNOON FOR THE NORTH OREGON COAST AND THE CENTRAL OREGON COAST.
  • A HIGH SURF ADVISORY IS IN EFFECT UNTIL 10 PM TONIGHT FOR THE SOUTH CENTRAL OREGON COAST AND THE CURRY COUNTY COAST.
  • A HIGH SURF ADVISORY IS IN EFFECT UNTIL 10 PM TONIGHT FOR THE NORTH OREGON COAST AND THE CENTRAL OREGON COAST.

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

An Upper Level Low Pressure Trough (“U” shape) is sitting along the coast.  The graphics for days 1-3  show the cold front moving through the Pacific Northwest. The graphics for days 3-7  Tuesday through Saturday show a frontal system moving through Tuesday and more frontal activity Friday and next Saturday.

Forecast For The South Willamette Valley Including Eugene-Springfield:

  • Mostly cloudy with showers and a slight (20%) chance of evening thunderstorms, showers likely (70%) late tonight (0.25 in. of rain possible, more in storms),
  • Mostly cloudy with a good (50%) chance of showers Sunday (0.10 in. of rain possible), rain Sunday night (0.25 in. of rain possible),
  • Mostly cloudy with rain and a bit warmer Monday (0.25 in. of rain possible), rain (0.25 in. of rain possible) and windy at night (Wind: S 15-20 mph gusts to 35 mph increasing and shifting to SW 25-30 mph gusts to 45 mph late at night),
  • Mostly cloudy with AM rain and a slight (20%) chance of thunderstorms, showers and breezy and a bit cooler Tuesday afternoon, rain with a slight (20%) chance of evening thunderstorms, then rain late Tuesday night.
  • lows 36-43 cooling back to 36 Tuesday night highs 46-50.
  • Mostly cloudy and a bit cooler with rain Wednesday, rain Wednesday night,
  • Mostly cloudy with rain and snow Thursday, evening rain and snow likely (70%), a slight (20%) chance of rain and snow late at night,
  • Mostly cloudy and a bit cooler with a good (50%) chance of rain and snow Friday and in the evening, snow likely (70%) late Friday  night,
  • Then mostly cloudy and a bit warmer with rain and snow likely (70%) Saturday.
  • highs 44-42 warming back to 44 Saturday lows 35-33 warming back to 35 Friday night. (seasonal averages high 47 low 35)

Forecast for the Umpqua Valley including Roseburg:

  • Mostly cloudy with evening rain showers and snow showers and a slight (20%) chance of thunderstorms, rain and snow showers late tonight (0.25 in. of rain possible, 2-3 in. of snow possible, snow level 2,000 ft.),
  • Mostly cloudy with AM rain and snow showers, a good (50%) chance of rain and snow showers and a bit cooler Sunday afternoon (0.10 in. of rain possible, snow level 2,000 ft. rising to 2,500 ft. in the afternoon), cloudy with evening rain and snow showers likely (70%), rain and snow late Sunday night (under 0.10 in. of rain possible, snow level 2,000 ft., little or no snow accumulation expected),
  • Mostly cloudy with rain and a bit warmer Monday (0.10 in. of rain possible), rain (0.25 in. of rain possible) and windy Monday night (Wind: S 10-15 mph increasing to S 20-30 mph late at night),
  • Mostly cloudy with AM rain and a slight (20%) chance of thunderstorms, rain snow with a slight (20%) chance of thunderstorms and a bit cooler Tuesday afternoon and windy, then rain and snow Tuesday night.
  • lows 37-44 cooling to 38 Tuesday night highs 46-49 cooling to 47 Tuesday.
  • Mostly cloudy with rain and snow and a bit cooler Wednesday, rain and snow Wednesday night,
  • Mostly cloudy with rain and snow Thursday, evening rain and snow likely (70%), a good (50%) of rain and snow at night,
  • Mostly cloudy with a (40%) chance of rain and snow Friday and in the evening, rain and snow likely (70%) late Friday night,
  • Then mostly cloudy and a bit warmer with rain and snow likely (70%) Saturday.
  • highs 43-45 lows near 35. (seasonal averages high 49 low 37).

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

  • Mostly cloudy with evening coastal showers and a slight (20%) chance of thunderstorms while inland evening showers snow showers and a slight ()20%) chance of thunderstorms, showers late tonight (0.25 in of rain possible, snow level 2,000 ft., no snow accumulation expected),
  • Mostly cloudy with AM showers, showers likely (70%) and a bit warmer Sunday afternoon (0.10 in. of rain possible), cloudy with coastal rain at night while inland evening rain likely (70%), rain late Sunday night (0.10 in. of rain possible),
  • Mostly cloudy with rain and a bit warmer Monday (0.25 in. of rain possible), rain (0.25 in. of rain possible) and windy Monday night (Wind: S 10-20 mph increasing and shifting to SW 20-30 mph gusts to 45 mph late at night),
  • Mostly cloudy with rain and a bit cooler Tuesday and windy, then rain Tuesday night.
  • lows 39-44 cooling to 40 Tuesday night highs 52-56 cooling to 54 Monday.
  • Mostly cloudy with rain and a bit cooler Wednesday, rain Wednesday night,
  • Mostly cloudy with rain Thursday, rain likely (70%) at night,
  • Mostly cloudy with a good (50%) chance of rain Friday, a good (50%) chance of evening rain, rain likely (70%) late Friday night,
  • Then mostly cloudy with rain likely (70%) Saturday.
  • highs near 52 lows near 38. (seasonal averages high 53 low 41)

Forecast for the Northern Oregon Cascades including Willamette Pass:

  • Mostly cloudy with snow showers and a slight (20%) chance of evening thunderstorms, snow showers late tonight (0.50 in. of rain possible, 5-9 in. of snow possible, snow possibly heavy at times),
  • Mostly cloudy and a bit cooler with snow showers Sunday (1-4 in. of snow possible), snow Sunday night,
  • Mostly cloudy with snow and rain and a bit warmer Monday, rain at night with snow late and very windy (Pass Wind: SW 15-20 mph gusts to 35 mph increasing to SW 30-40 mph gusts to 60 mph late),
  • Mostly cloudy with AM rain and snow and a slight (20%) chance of thunderstorms, a bit cooler with snow showers and a slight (20%) chance of thunderstorms Tuesday afternoon (afternoon snow possibly heavy at times) and very windy, then snow (possibly heavy at times) Tuesday night.
  • snow level 2,000 ft. tonight through Sunday night, 3,000 ft. rising to 5,000 ft. Monday afternoon, 5,500 ft. Monday night, 2,500 ft. Tuesday, then 2,000 ft. Tuesday night
  • lows 22-27 cooling to 23 Tuesday night highs 26-34 cooling to 32 Monday.
  • Mostly cloudy and a bit cooler with snow (possibly heavy at times) Wednesday, snow (possibly heavy at times) Wednesday night,
  • Mostly cloudy and a bit cooler with snow (possibly heavy at times) Thursday, snow and rain at night (snow possibly heavy at times),
  • Mostly cloudy and a bit warmer with snow and rain likely (70%) Friday (AM snow possibly heavy at times), snow and rain likely (70%) late Friday night,
  • Then mostly cloudy with snow and rain likely (70%) and a bit warmer Saturday.
  • snow level 2,000 ft. Wednesday, 1,500 ft. Wednesday night and Thursday, 2,000 ft. Thursday night through Friday night, then 2,500 ft.  Saturday.
  • highs 26-29 lows near 20.