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January 11, 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 BLUE MOUNTAINS OF OREGON.
  • A WINTER STORM WARNING IS IN EFFECT UNTIL 4AM SUNDAY  FOR THE GRANDE RONDE VALLEY AND WALLOWA COUNTY.
  • A WINTER STORM WARNING IS IN EFFECT UNTIL 4AM SUNDAY  FOR THE GRANDE RONDE VALLEY AND WALLOWA COUNTY.
  • A WIND CHILL WATCH IS IN EFFECT FROM FRIDAY AFTERNOON THROUGH SATURDAY MORNING GRANDE RONDE VALLEY AND WALLOWA COUNTY.
  • A WINTER STORM WARNING IS IN EFFECT UNTIL 4 AM SUNDAY FOR THE JOHN DAY BASIN.
  • A WINTER STORM WARNING IS IN EFFECT UNTIL 5 PM MST SATURDAY FOR BAKER COUNTY.
  • A WINTER STORM WATCH IS IN EFFECT FROM FRIDAY AFTERNOON THROUGH LATE SATURDAY NIGHT FOR THE CENTRAL WILLAMETTE VALLEY AND THE SOUTH WILLAMETTE VALLEY.
  • A WINTER STORM WARNING IS IN EFFECT UNTIL 4 AM SUNDAY FOR THE NORTHERN BLUE MOUNTAINS OF OREGON.
  • A WINTER STORM WARNING IS IN EFFECT UNTIL 4 AM SUNDAY FOR THE FOOTHILLS OF THE SOUTHERN BLUE MOUNTAINS OF OREGON, AND NORTH CENTRAL OREGON.
  • A WINTER STORM WATCH IS IN EFFECT FROM FRIDAY AFTERNOON THROUGH LATE SATURDAY NIGHT FOR THE WESTERN COLUMBIA RIVER GORGE.
  • A WINTER STORM WATCH IS IN EFFECT FROM FRIDAY AFTERNOON THROUGH LATE SATURDAY NIGHT BELOW 1,500 FT. FOR THE NORTHERN OREGON CASCADE FOOTHILLS AND THE CASCADE FOOTHILLS IN LANE COUNTY.
  • A WINTER STORM WARNING IS IN EFFECT UNTIL 4 AM SUNDAY ABOVE 1,500 FT. FOR THE NORTHERN OREGON CASCADES AND THE CASCADES IN LANE COUNTY.
  • A WINTER STORM WARNING IS IN EFFECT UNTIL 4 AM SUNDAY ABOVE 1,500 FT. FOR THE NORTHERN OREGON CASCADE FOOTHILLS AND THE CASCADE FOOTHILLS IN LANE COUNTY.
  • A WINTER STORM WATCH IS IN EFFECT FROM FRIDAY AFTERNOON THROUGH LATE SATURDAY NIGHT FOR THE NORTH OREGON COAST AND THE CENTRAL OREGON COAST.
  • A WINTER STORM WARNING IS IN EFFECT UNTIL 4 AM SUNDAY FOR THE OCHOCO AND THE JOHN DAY HIGHLANDS.
  • A WINTER STORM WARNING IS IN EFFECT FROM 1 AM FRIDAY UNTIL 4 AM SUNDAY FOR CENTRAL OREGON.
  • A WINTER STORM WARNING IS IN EFFECT FROM 1 AM FRIDAY UNTIL 4 AM SUNDAY FOR CENTRAL OREGON.
  • A WINTER STORM WARNING IS IN EFFECT UNTIL 4 AM SUNDAY FOR THE EAST SLOPES OF THE OREGON CASCADES.
  • A WINTER STORM WARNING IS IN EFFECT FROM 11 PM MST TONIGHT UNTIL 11 PM MST SATURDAY FOR HARNEY COUNTY AND MALHEUR COUNTY.
  • A WIND CHILL WATCH IS IN EFFECT FROM FRIDAY EVENING THROUGH LATE SATURDAY NIGHT FOR  THE FOOTHILLS OF THE SOUTHERN BLUE MOUNTAINS OF OREGON AND NORTH CENTRAL OREGON.
  • A WIND CHILL WATCH IS IN EFFECT FROM FRIDAY AFTERNOON THROUGH LATE SATURDAY NIGHT FOR THE FOOTHILLS OF THE SOUTHERN BLUE MOUNTAINS OF OREGON AND NORTH CENTRAL OREGON.
  • A WIND CHILL WATCH IS IN EFFECT FROM FRIDAY EVENING THROUGH LATE SATURDAY NIGHT FOR CENTRAL OREGON.
  • A WINTER STORM WATCH IS IN EFFECT FROM FRIDAY AFTERNOON THROUGH SATURDAY AFTERNOON FOR THE CENTRAL WILLAMETTE VALLEY AND THE SOUTH WILLAMETTE VALLEY.
  • A WINTER STORM WATCH IS IN EFFECT FROM FRIDAY AFTERNOON THROUGH LATE SATURDAY NIGHT FOR THE LOWER COLUMBIA.
  • A WINTER STORM WATCH IS IN EFFECT FROM FRIDAY AFTERNOON THROUGH LATE SATURDAY NIGHT FOR THE COAST RANGE OF NORTHWEST OREGON AND THE CENTRAL COAST RANGE OF WESTERN OREGON.
  • A WINTER STORM WATCH IS IN EFFECT FROM FRIDAY AFTERNOON THROUGH LATE SATURDAY NIGHT FOR THE GREATER PORTLAND METRO AREA.
  • A WINTER STORM WARNING IS IN EFFECT FROM 10 PM TONIGHT UNTIL 10 PM FRIDAY ABOVE 3,000 FT. FOR THE EASTERN DOUGLAS COUNTY FOOTHILLS.
  • A WINTER STORM WARNING IS IN EFFECT UNTIL 4 AM SUNDAY FOR THE SOUTHERN BLUE MOUNTAINS OF OREGON.
  • A WINTER WEATHER ADVISORY IS IN EFFECT UNTIL 10 PM TONIGHT ABOVE 2,500 FT. FOR THE EASTERN DOUGLAS COUNTY FOOTHILLS.
  • A WINTER STORM WARNING IS IN EFFECT FROM 4 AM FRIDAY UNTIL 10 PM SATURDAY ABOVE 4,500 FT. FOR THE KLAMATH BASIN, NORTHERN AND EASTERN KLAMATH COUNTY, AND WESTERN, CENTRAL, AND EASTERN LAKE COUNTY.
  • A WINTER STORM WARNING IS IN EFFECT FROM 10 PM TONIGHT THROUGH 10 PM FRIDAY FOR THE SOUTH CENTRAL OREGON CASCADES, THE SISKIYOU MOUNTAINS, AND THE SOUTHERN OREGON CASCADES.
  • A WINTER STORM WARNING IS IN EFFECT FROM 11 PM TONIGHT UNTIL 11 PM SATURDAY FOR THE OREGON LOWER TREASURE VALLEY.
  • A WINTER STORM WATCH IS IN EFFECT FROM FRIDAY EVENING THROUGH SATURDAY EVENING FOR THE SOUTH CENTRAL OREGON CASCADES, THE SISKIYOU MOUNTAINS, AND THE SOUTHERN OREGON CASCADES.
  • A WINTER STORM WATCH IS IN EFFECT FROM LATE FRIDAY NIGHT THROUGH LATE SATURDAY NIGHT FOR THE EASTERN COLUMBIA RIVER GORGE OF OREGON AND THE EASTERN COLUMBIA BASIN OF OREGON.
  • A WIND ADVISORY IS IN EFFECT UNTIL 7 AM FRIDAY FOR THE EASTERN COLUMBIA RIVER GORGE OF OREGON AND THE LOWER COLUMBIA BASIN OF OREGON, THE FOOTHILLS OF THE NORTHERN BLUE MOUNTAINS OF OREGON, THE FOOTHILLS OF THE SOUTHERN BLUE MOUNTAINS OF OREGON, AND NORTH CENTRAL OREGON.
  • A FLOOD WATCH IS IN EFFECT FROM SATURDAY EVENING UNTIL UNTIL LATE MONDAY EVENING FOR THE COQUILLE RIVER AT COQUILLE AFFECTING THE SOUTH CENTRAL OREGON COAST ZONE.

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 High Pressure Ridge (“Arch” shape) has moved along the coast sending northerly airflow into the Pacific Northwest.  The graphics for days 1-3  show a frontal system moving through the Pacific Northwest from the north Friday, a backdoor front, bringing colder air. The graphics for days 3-7  Sunday through Thursday show a the parade of frontal systems approaching the Pacific Northwest.

Note: Due to the heavy snowfall in the area Willamette Pass, Hoodoo, and Mt Ashland are all open for skiing, if you can get there through the snow. Check their web pages for details.

Forecast For The South Willamette Valley Including Eugene-Springfield:

  • Mostly cloudy with evening showers, rain late tonight (0.25 in. of rain possible),
  • Mostly cloudy and a bit cooler with snow and rain Friday (0.50 in. of rain possible, snow level 1,000 ft.), rain and snow and freezing rain Friday night with sleet late at night (0.50 in. of rain possible, 1 in. of snow possible, 0.10 in. of ice accumulation possible, snow level 1,000 ft.),
  • Mostly cloudy and a bit cooler with rain, freezing rain, sleet and rain Saturday (0.75 in. of rain possible), evening  rain and snow and freezing rain with sleet likely (70%), a  good (50%) chance of freezing rain, sleet and rain late at night (0.10 in. of rain possible),
  • Mostly cloudy with a (30%) chance of AM rain showers and freezing rain with a slight (20%) chance of snow showers, a (30%) chance of rain showers and freezing rain and a bit cooler Sunday afternoon (snow level 500 ft.), just partly cloudy Sunday night.
  • lows 39-23 highs 45-35.
  • Mostly cloudy Monday (Martin Luther King, Jr. Day), mostly cloudy in the evening, partly cloudy late Monday night,
  • Mostly cloudy with a slight (20%) chance of AM rain and snow, a bit warmer with a good (50%) chance of rain Tuesday afternoon, rain at night,
  • Mostly cloudy with rain and a bit warmer Wednesday, a good (50%) chance of rain and a slight (20%) chance of snow Wednesday night,
  • Then mostly cloudy with a good (50%) chance of rain and snow Thursday.
  • highs 35-47 lows 23-38. (seasonal averages high 48 low 35)

Forecast for the Umpqua Valley including Roseburg:

  • Mostly cloudy with evening rain and snow, rain and snow likely (70%) late tonight (under 0.10 in. of rain possible, snow level 2,500 ft.),
  • Mostly cloudy with rain and snow Friday (0.25 in. of rain possible, snow level 2,500 ft.), rain, snow and freezing rain Friday night (0.50 in. of rain possible, snow level 2,500 ft., no snow accumulation expected, ice accumulation under 0.25 in.),
  • Mostly cloudy and a bit warmer with rain and freezing rain, possibly heavy at times Saturday (0.75 in. of rain possible, ice accumulation 0.25 in. or less), evening rain likely (70%) with freezing rain,  rain and snow likely (70%) with a (40%) chance of light freezing rain late at night (0.25 in. of rain possible, snow level 3,500 ft. falling to 2,000 ft. late at night),
  • Mostly cloudy with a (30%) chance of AM rain and light freezing rain, a bit cooler with a slight (20%) chance of rain Sunday afternoon, then just mostly cloudy Sunday night.
  • lows 40-42 cooling to 34 Sunday night highs 46-52.
  • Mostly cloudy and a bit warmer Monday (Martin Luther King, Jr. Day), partly cloudy with a slight (20%) chance of rain and snow late Monday night,
  • Mostly cloudy and a bit warmer with a (30%) chance of rain Tuesday, rain likely (70%) at night,
  • Mostly cloudy with rain likely (70%) and a bit warmer Wednesday, a good (50%) chance of rain Wednesday night,
  • Then mostly cloudy and a bit warmer with a (40%) chance of rain Thursday.
  • highs 47-54 lows 34-42. (seasonal averages high 50  low 37).

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

  • Cloudy with early evening rain likely (70%), showers, a good (50%) chance of rain tonight (under 0.10 in. of rain possible),
  • Mostly cloudy with AM rain likely (70%), rain and a bit warmer Friday afternoon and evening (0.25 in. of rain possible), rain and freezing rain late Friday night (0.75 in. of rain possible),
  • Mostly cloudy with AM rain and freezing rain, rain and a bit warmer Saturday afternoon (1.25 in. of rain possible), evening coastal rain with coastal rain likely (70%) late Saturday night (0.10 in. of rain possible),
  • Partly cloudy with a good (50%) chance of AM rain and and light freezing rain, partly cloudy with and a bit cooler with a slight (20%) chance of rain Sunday afternoon, then just partly cloudy Sunday night.
  • lows 42-33 highs 52-57 cooling to 50 Sunday.
  • Partly cloudy and a bit warmer Monday (Martin Luther King, Jr. Day) and in the evening, mostly cloudy with a slight (20%) chance of rain late Monday night,
  • Mostly cloudy with a good (50%) chance of AM rain, rain likely (70%) and a bit warmer Tuesday afternoon and evening, just mostly cloudy late at night,
  • Mostly cloudy with rain likely (70%) Wednesday and in the evening, a good (50%) chance of rain late Wednesday night,
  • Then mostly cloudy and a bit warmer with a (40%) chance  of rain Thursday.
  • highs 55-60 lows 37-44 cooling to 42 Wednesday night. (seasonal averages high 53 low 41)

Forecast for the Northern Oregon Cascades including Willamette Pass:

  • Mostly cloudy with evening snow showers, snow late tonight (15-21 in. of snow possible, blowing snow, snow possibly heavy at times, visibility 0.25 mi. or less) and windy (Pass Wind: W 20-30 mph Gusts to 45 mph),
  • Mostly cloudy with AM snow and rain and blowing snow, snow and rain and a bit cooler Friday (15-21 in. of snow possible, 1.50 in. of rain possible, snow possibly heavy at times, areas of blowing snow, visibility 0.25 in. or less) and windy (Pass Wind: SW 20-30 mph gusts to 45 mph decreasing 10 W 15-20 mph gusts to 30 mph in the afternoon), evening blowing snow, snow and rain Friday night (1.00 in,. of rain possible, 6-10 in. of snow possible, snow possibly heavy at times, visibility 0.25 mi. or less)
  • Mostly cloudy and a bit warmer with snow and rain Saturday (snow possibly heavy at times, areas of blowing snow, visibility 0.25 mi. or less), evening snow and rain with blowing snow and snow possibly heavy at times, a good (50%) chance of rain and snow at night,
  • Clouds and sun with AM rain and snow showers likely (70%), a mix of clouds and sun with a good (50%) of rain and snow showers Sunday afternoon, partly cloudy with a (%) chance of evening snow showers, then just partly cloudy late Sunday night.
  • snow level 2,500 ft, tonight, 2,000 ft. Friday and Friday night, 3,000 ft. Saturday and Saturday night, 2,500 ft. Sunday, then 2,000 ft. Sunday night.
  • lows 25-16 highs 29-32.
  • Partly cloudy and a bit warmer Monday (Martin Luther King, Jr. Day), partly cloudy Monday night,
  • Clouds and sun with with a slight (20%) chance of AM snow and a slight (20%) chance of rain, a mix of clouds and sun and a bit warmer with a  (40%) chance of rain Tuesday, a good (50%) chance of evening rain snow,  rain and snow likely (70%) late at night,
  • Mostly cloudy with AM rain and snow, rain with a slight (20%) chance of snow Wednesday afternoon, evening rain and snow likely (70%), a good (50%) chance of rain and snow late Wednesday night,
  • Then a mix of clouds and sun and a bit warmer with a good (50%) chance of rain and snow Thursday.
  • free air freezing level 5,000 ft. Monday, 7,000 ft. Monday night, snow level 4,000 ft. Tuesday, 5,500 ft. Tuesday night through Wednesday night, then 6,000 ft. Thursday.
  • highs 33-37 lows 22-30 cooling to 27 Wednesday night.