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July 22, 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

  • A RED FLAG WARNING IS IN EFFECT UNTIL 10 PM SUNDAY FOR WIND AND LOW RELATIVE HUMIDITY FOR THE LOWER COLUMBIA BASIN OF OREGON.
  •  HEAT ADVISORY IS IN EFFECT UNTIL MIDNIGHT MDT SUNDAY NIGHT FOR THE OREGON LOWER TREASURE VALLEY.
  • A HEAT ADVISORY IS IN EFFECT UNTIL MIDNIGHT MDT TONIGHT FOR THE OWYHEE MOUNTAINS AND MALHEUR COUNTY.
  • A HEAT ADVISORY IS IN EFFECT UNTIL 11 PM TONIGHT FOR HARNEY COUNTY.
  • A FIRE WEATHER WATCH IS IN EFFECT FROM SUNDAY AFTERNOON THROUGH MONDAY EVENING FOR GUSTY WINDS AND LOW RELATIVE HUMIDITY FOR THE BURNS BLM AND VALE BLM.
  • A FIRE WEATHER WATCH IS IN EFFECT FROM SUNDAY AFTERNOON THROUGH MONDAY EVENING FOR GUSTY WINDS, LOW RELATIVE HUMIDITY,  AND LIGHTNING FOR THE OWYHEE MOUNTAINS AND MALHEUR COUNTY.
  • AN AIR QUALITY ALERT IS IN EFFECT UNTIL 11 PM MONDAY FOR JEFFERSON AND WASCO COUNTY.
  • AN AIR QUALITY ALERT IS IN EFFECT UNTIL 5 PM MONDAY FOR CURRY COUNTY, JACKSON COUNTY, AND JOSEPHINE COUNTY.

HEALTH ADVISORIES

  • A RECREATIONAL USE HEALTH ADVISORY IS IN EFFECT FOR GALESVILLE RESERVOIR IN DOUGLAS 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 THE GALESVILLE RESERVOIR 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

  • We’re between an Upper Level High Pressure Ridge (“Arch” shape) and an Upper Level Low Pressure Trough. The graphics for days 1-3  show a weak cold front approaching the coast today. The graphics for days 3-7   Tuesday through Saturday show no frontal activity pushing into or through Oregon during the period.

Forecast For The South Willamette Valley Including Eugene-Springfield:

  • Clear tonight,
  • Sunny and a bit cooler Sunday, clear in the evening, partly cloudy late Sunday night,
  • Mostly cloudy and a bit cooler with a slight (20%) chance of showers Monday and in the evening, a (40%) chance of showers late at night,
  • AM clouds, sunny Tuesday afternoon, then clear Tuesday night.
  • lows 54-60 cooling to 53 Tuesday night highs 89-77 warming to 86 Tuesday.
  • Sunny and a bit warmer Wednesday, clear Wednesday night,
  • Sunny Thursday and Friday, clear both nights,
  • Then mostly sunny Saturday.
  • highs near 87 lows near 52.  (seasonal averages high 86 low 52)

Forecast for the Umpqua Valley including Roseburg:

  • Clear tonight, hazy late,
  • Some AM haze, sunny and a bit cooler Sunday afternoon, mostly clear and hazy Sunday night,
  • AM sun and haze, partly cloudy with a slight (20%) chance of showers Monday afternoon, partly cloudy at night,
  • Some AM clouds, sunny and a bit warmer Tuesday afternoon, then clear Tuesday night.
  • lows 59-55 warming to 60 Monday night cooling to 56 Tuesday night highs 90-86 warming to 88 Tuesday.
  • Sunny Wednesday, clear Wednesday night,
  • Sunny and a bit cooler Thursday, clear at night,
  • Then sunny and a bit warmer Friday and Saturday, clear Friday night.
  • highs 88-83 warming to 88 Saturday lows near 55 (seasonal averages high 88 low 58)

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

  • Mostly clear this evening, mostly cloudy late tonight,
  • AM clouds and patchy fog, sunny and a bit warmer Sunday afternoon, mostly clear and hazy in the evening, partly cloudy Sunday night,
  • Partly cloudy with a slight (20%) chance of AM coastal showers and mostly cloudy and a bit warmer with a slight (20%) chance of coastal showers in the afternoon while AM inland sun and partly cloudy a bit warmer with a slight (20%) chance of inland showers Monday afternoon, mostly cloudy in the evening, partly cloudy late at night,
  • Some AM clouds, sunny Tuesday afternoon, then mostly clear Tuesday night.
  • lows 55-59 cooling to 54 Tuesday night highs 72-74.
  • Mostly sunny and a bit cooler Wednesday, mostly clear Wednesday night,
  • Then mostly sunny Thursday, Friday, and Saturday, mostly clear each night.
  •  highs near 73 lows 55-53 warming back to 55 Friday night. (seasonal averages high 67 low 54)

Forecast for the Northern Oregon Cascades including Willamette Pass:

  • Clear tonight,
  • Partly cloudy and a bit cooler Sunday, mostly clear at night, becoming hazy late,
  • Mostly sunny and hazy start, partly cloudy and a bit cooler Monday, partly cloudy with a slight (20%) chance of showers Monday night,
  • Some AM clouds, sunny Tuesday afternoon, then clear Tuesday night.
  • free air freezing level 16,000 ft. tonight and Sunday, 15,000 ft. Sunday night, 15,000 ft. falling to 13,000 ft. Monday afternoon, 1snow level above 8,000 ft.  Monday night, free air freezing level 14,000 ft. Tuesday, then 15,000 ft. Tuesday night.
  • lows 50-46 highs 79-72.
  • Sunny and a bit warmer Wednesday, clear Wednesday  night,
  • Sunny Thursday and Friday, clear both nights nights,
  • Then sunny Saturday.
  • free air freezing level 14,000 ft. Wednesday through through Friday night, then 13,000 ft. Saturday.
  • highs near 75 lows near 45.