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September 20, 2022

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 QUALITY ADVISORY IS IN EFFECT UNTIL 11 AM WEDNESDAY FOR LANE COUNTY DUE TO WILDFIRE SMOKE.

HEALTH ADVISORIES

  • A RECREATIONAL HEALTH ADVISORY IS IN EFFECT FOR ALL OF UPPER KLAMATH LAKE IN KLAMATH COUNTY INCLUDING SHOALWATER BAY DUE THE PRESENCE OF A CYANOBACTERIA (BLUE-GREEN ALGAE) BLOOM AND CYANOTOXINS ABOVE RECREATIONAL USE VALUES FOR HUMAN EXPOSURE. PEOPLE SHOULD AVOID SWIMMING AND HIGH-SPEED WATER ACTIVITIES, SUCH AS WATER SKIING OR POWER BOATING, IN AREAS OF THE LAKE WHERE BLOOMS ARE, AS THE MAJOR RISK OF EXPOSURE IS FROM INGESTING WATER. THESE TOXINS ARE NOT ABSORBED THROUGH THE SKIN. HOWEVER, IF YOU HAVE SKIN SENSITIVITIES  YOU MAY GET A PUFFY RED RASH. IT CAN BE HARMFUL TO PETS AND PEOPLE IF ACCIDENTAL INGESTION OCCURS. SPECIAL CARE SHOULD BE TAKEN WITH CHILDREN, ESPECIALLY THE YOUNGER ONES, WHEN THEY ARE NEAR THE WATER.
  • NOTE: A RECREATIONAL HEALTH ADVISORY IS IN EFFECT FOR THE WILLAMETTE RIVER NEAR CATHEDRAL PARK IN NORTH PORTLAND  DUE THE PRESENCE OF A CYANOBACTERIA (BLUE-GREEN ALGAE) BLOOM AND CYANOTOXINS ABOVE RECREATIONAL USE VALUES FOR HUMAN EXPOSURE. IT HAS BEEN EXPANDED UPSTREAM (SOUTH) TO THE WILLAMETTE COVE AREA NEAR THE SP&S RAILROAD BRIDGE. PEOPLE SHOULD AVOID SWIMMING AND HIGH-SPEED WATER ACTIVITIES, SUCH AS WATER SKIING OR POWER BOATING, IN AREAS OF THE LAKE WHERE BLOOMS ARE, AS THE MAJOR RISK OF EXPOSURE IS FROM INGESTING WATER. THESE TOXINS ARE NOT ABSORBED THROUGH THE SKIN. HOWEVER, IF YOU HAVE SKIN SENSITIVITIES  YOU MAY GET A PUFFY RED RASH. IT CAN BE HARMFUL TO PETS AND PEOPLE IF ACCIDENTAL INGESTION OCCURS. SPECIAL CARE SHOULD BE TAKEN WITH CHILDREN, ESPECIALLY THE YOUNGER ONES, WHEN THEY ARE NEAR THE WATER. BLOOMS CAN DEVELOP AND DISAPPEAR ON ANY BODY OF WATER AT ANY TIME, EVEN IN THE FALL AND WINTER IF CONDITIONS ARE FAVORABLE. ONLY A FRACTION OF WATER BODIES IN OREGON ARE MONITORED FOR CYANOBACTERIA, BLOOMS AND TOXINS DURING THE RECREATION SEASON, AND NO MONITORING OR SAMPLING IS PERFORMED ONCE RECREATION SEASON HAS ENDED. IT IS VERY IMPORTANT FOR PEOPLE TO BECOME FAMILIAR WITH SIGNS OF BLOOM, EXPOSURES, AND SYMPTOMS BY VISITING OHA’S CYANOBACTERIA HARMFUL ALGAE BLOOM WEBSITE AT:  http://www.healthoregon.org/hab.
  • A PERMANENT RECREATIONAL HEALTH ADVISORY IS IN EFFECT FOR THE SOUTH UMPQUA RIVER AND MAINSTEM UMPQUA RIVER. THE ADVISORY COVERS THE SOUTH UMPQUA RIVER FROM CANYONVILLE DOWNSTREAM TO THE CONFLUENCE OF THE MAINSTEM UMPQUA RIVER, AND THE MAINSTEM UMPQUA RIVER DOWNSTREAM PAST ELKTON TO LAWSON BAR. PEOPLE IN THE BEDROCK ALONG THE RIVERS EDGE ARE ARE KNOWN TO DEVELOP CYANOBACTERIA (BLUE-GREEN ALGAE) BLOOMS THAT CAN BE HARMFUL TO PETS AND PEOPLE IF ACCIDENTAL INGESTION OCCURS. SIGNS HAVE BEEN POSTED AT SEVERAL ACCESS AREAS ALONG THE RIVER.

THE WEATHER PATTERN

  • An Upper Level Low Pressure Trough  (“U” shape) hovers off the Oregon/ California coastline keeping the chance of showers with us. It spun the air in from the southeast to bring high levels of particulate matter from the Cedar Creek wildfire. It will take a while to clear out. The graphics for days 1-3 show the frontal system sliding into northern California. The graphics for days 3-7 Friday through Tuesday show a frontal system to our northwest next Tuesday.

Forecast for the South Willamette Valley including Eugene-Springfield:

  • Clouds and sun with a slight (20%) chance of AM showers, a mix of clouds and sun and a bit cooler with a good (50%) chance of showers this afternoon (under 0.10 in. of rain possible), mostly cloudy with a good (50%) of showers tonight (under 0.10 in. of rain possible),
  • A mix of clouds and sun a with a good (50%) chance of showers Wednesday (under 0.10 in. of rain possible), mostly cloudy with a (40%) chance of evening showers, a slight (20%) chance of showers late at night,
  • Partly cloudy and a bit warmer Thursday (Autumnal Equinox 6:03 pm), then partly cloudy Thursday night.
  • highs 73-75 lows 53-48.
  • Partly cloudy Friday and Friday night,
  • Mostly sunny and a bit warmer Saturday, mostly clear at night,
  • Then mostly sunny and a bit warmer Sunday and Monday, mostly clear Sunday night.
  • highs 75-83 lows 49-52. (Seasonal Averages high 77 low 47)

Forecast for the Umpqua Valley including Roseburg:

  • Cloudy with AM showers likely (70%), cloudy with a good (50%) chance of showers and a slight (20%) chance of thunderstorms and cooler this afternoon (under 0.10 in. of rain possible) and evening, showers with a slight (20%) chance of thunderstorms late tonight (0.10 in. of rain possible),
  • Mostly cloudy with a (30%) chance of AM showers, a (30%) chance of showers with a slight (20%) chance of thunderstorms and a bit cooler Wednesday afternoon (under 0.10 in. of rain possible) and evening, just a slight (20%) chance of showers late at night (under 0.10 in. of rain possible),
  • Some AM clouds, sunny and a bit warmer Thursday afternoon (Autumnal Equinox 6:03 pm), then mostly clear Thursday night.
  • highs 69-66 warming to 74 Thursday lows 56-50.
  • Mostly sunny and a bit warmer Friday, mostly clear Friday night,
  • Mostly sunny and a bit warmer Saturday and Sunday, mostly clear both nights,
  • Then mostly sunny and a bit cooler Monday.
  • highs 77-85 cooling to 83 Monday lows 50-53. (Seasonal Averages high 79 low 51).

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

  • Mostly cloudy with AM showers likely (70%), a (40%) coastal showers and a bit cooler this afternoon while a (40%) chance of inland showers and a slight (20%) chance of thunderstorms and a bit cooler this afternoon, (under 0.10 in. of rain possible) mostly cloudy with a (30%) chance of coastal showers tonight while a (40%) chance of inland evening showers and a slight (20%) chance of thunderstorms, then inland showers likely (70%) late tonight (under 0.10 in. of rain possible),
  • Mostly cloudy with a (30%) chance of showers Wednesday (under 0.10 in. of rain possible), mostly cloudy with a slight (20%) chance of evening showers, just mostly cloudy late Wednesday night,
  • Partly cloudy and warmer Thursday (Autumnal Equinox 6:03 pm), then partly cloudy Thursday night.
  • highs 62-69 lows 55-52.
  • Partly cloudy and warmer Friday, partly cloudy Friday night,
  • Sunny and a bit warmer Saturday, mostly clear in the evening, partly cloudy late at night,
  • Sunny and a bit warmer Sunday, partly cloudy Sunday night,
  • Then sunny and a bit cooler Monday.
  • highs 70-78 cooling to 74 Monday lows near 52. (Seasonal Averages high 67 low 51)

Forecast for the Northern Oregon Cascades including Willamette Pass:

  • Mostly cloudy with AM showers likely (70%), showers likely (70%) with a slight (20%) chance of thunderstorms and a bit cooler this afternoon (0.10 in. of rain possible), showers likely (70%) with a slight (20%) chance of thunderstorms tonight,
  • Mostly cloudy with a AM showers likely (70%), showers likely (70%) with a slight (20%) chance of thunderstorms and a bit cooler Wednesday afternoon, cloudy with a good (50%) chance of showers at night,
  • Mostly cloudy with a slight (20%) chance of AM showers, becoming mostly sunny and a bit warmer with areas of smoke Thursday afternoon (Autumnal Equinox 6:03 pm), then mostly clear Thursday night.
  • snow level above 8,000 ft. today through Thursday, then free air freezing level 12,000 ft. rising to 13,000 ft. late Thursday night.
  • highs 58-52 warming to 56 Thursday lows 42-38.
  • Mostly sunny and a bit warmer Friday, partly cloudy Friday night,
  • Mostly sunny and a bit warmer Saturday and Sunday, mostly clear both nights,
  • Then mostly sunny and a bit cooler Monday.
  • free air freezing level 13,000 ft. Friday and Friday night, 14,000 ft. Saturday, 16,000 ft. Saturday night, 16,000 ft. falling to  15,000 ft. Sunday afternoon, 15,0000 ft. Sunday night , then 15,000 ft. falling to 14,000 ft. Monday afternoon.
  • highs 62-74 cooling to 72 Monday lows 42-47.

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  • For all of your Eugene-Springfield and Lane County News, Weather, and Sports go to: EugeneDailyNews.com

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8/ 22 Plenty of sunshine, but cooler to start your workweek today.

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  • For all of your Eugene-Springfield and Lane County News, Weather, and Sports go to: EugeneDailyNews.com

Posted In Uncategorized

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Mostly clear again tonight, then sunshine and slightly cooler for your Friday.

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

  • Becoming mostly cloudy late tonight,
  • Some AM clouds, sunny and a bit warmer Friday afternoon, clear in the evening, partly cloudy late Friday night,
  • Mostly cloudy start, partly cloudy and slightly cooler Saturday afternoon, mostly clear at night,
  • Mostly sunny Sunday, then mostly clear Sunday night.
  • lows 54-56 cooling back to 54 Sunday night highs 70-69.
  • Mostly sunny and a bit warmer Monday, mostly clear Monday night,
  • Partly cloudy and slightly cooler Tuesday, partly cloudy at night,
  • Then partly cloudy Wednesday through Thursday.
  • highs 73-72 lows 54-56 cooling back to 54 Wednesday night. (Seasonal Averages high 66 low 54)

Forecast for the Northern Oregon Cascades including Willamette Pass:

  • Mostly clear tonight,
  • Mostly sunny and a bit cooler Friday, clear Friday night,
  • Sunny and a bit warmer Saturday, mostly clear at night,
  • Some AM clouds, mostly sunny and a bit cooler Sunday, then clear Sunday night.
  • free air freezing level 15,000 ft. falling to 14,000 ft. late tonight, 14,000 ft. rising to 15,000 ft. Friday afternoon, 15,000 ft. Friday night through Sunday, then 16,000 ft. Sunday night.
  • lows 49-47 highs 74-72 warming back to 74 Sunday.
  • Sunny and a bit warmer Monday, clear Monday night,
  • Sunny Tuesday, mostly clear at night,
  • Then mostly sunny and a bit cooler Wednesday and Thursday, mostly clear Wednesday night.
  • free air freezing level 16,000 ft. Monday through Thursday.
  • highs 80-75 lows 53-50.