Mostly clear overnight, mostly sunny & a bit cooler Wednesday.

Check out my latest Eugene Daily News “Weather Or Not” column now at:

On Your Mark, Get Set And Go, But Not Quite Yet.

Here is my new weekly weather quiz question. What is a “Spring Tide?” The First person to post the correct answer as a comment will win a week of free personalized weather forecasts tailored to your needs. 

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ADVISORIES:

  • A RED FLAG WARNING IS IN EFFECT FOR DRY THUNDERSTORMS AND GUSTY OUTFLOW WINDS UNTIL 10 PM TONIGHT FOR THE CENTRAL MOUNTAINS OF OREGON AND THE SOUTHERN BLUE AND STRAWBERRY MOUNTAINS.
  • A RED FLAG WARNING IS IN EFFECT FOR ABUNDANT LIGHTNING ON DRY FUELS UNTIL 8 PM TODAY FOR THE UMPQUA NATIONAL FOREST, THE SOUTHERN OREGON CASCADES, THE KLAMATH BASIN AND THE FREMONT-WINEMA NATIONAL FOREST, THE SOUTH CENTRAL OREGON DESERT INCLUDING THE BLM LAND IN EASTERN LAKE AND WESTERN HARNEY COUNTIES,  AND THE WESTERN KLAMATH NATIONAL FOREST, AND THE BAKE VALLEY.
  • A FIRE WEATHER WATCH IS IN EFFECT THROUGH THIS EVENING FOR ABUNDANT LIGHTNING ON DRY FUELS FOR THE SOUTH CENTRAL OREGON DESERT INCLUDING THE BLM LAND IN EASTERN LAKE AND WESTERN HARNEY COUNTIES,THE KLAMATH BASIN AND THE FREMONT-WINEMA NATIONAL FOREST, THE CENTRAL BLUE MOUNTAINS OF OREGON
  • A HEAT ADVISORY IS IN EFFECT UNTIL 9 PM TONIGHT FOR THE LOWER COLUMBIA, THE GREATER PORTLAND METRO AREA, THE CENTRAL WILLAMETTE VALLEY, THE SOUTH WILLAMETTE VALLEY, THE NORTHERN OREGON CASCADES FOOTHILLS, THE CASCADE FOOTHILLS IN LANE COUNTY, THE UPPER HOOD RIVER VALLEY, THE WESTERN COLUMBIA RIVER GORGE, AND THE CENTRAL COLUMBIA RIVER GORGE.
  • AN EXCESSIVE HEAT WARNING IS IN EFFECT FROM 8 AM WEDNESDAY UNTIL 8 PM THURSDAY FOR THE EAST COLUMBIA RIVER GORGE, NORTH CENTRAL OREGON, CENTRAL OREGON
  • AN EXCESSIVE HEAT WARNING IS IN EFFECT FROM 8 AM WEDNESDAY UNTIL 8 PM FRIDAY THE JOHN DAY BASIN, THE FOOTHILLS OF THE SOUTHERN BLUE MOUNTAINS OF OREGON, NORTH CENTRAL OREGON, CENTRAL OREGON, THE GRANDE RONDE VALLEY, WALLOWA COUNTY, THE NORTHERN BLUE MOUNTAINS OF OREGON, THE SOUTHERN BLUE MOUNTAINS OF OREGON, THE OCHOCO, THE JOHN DAY HIGHLANDS, AND THE NORTHWEST BLUE MOUNTAINS.
  • A HEAT ADVISORY IS IN EFFECT UNTIL 8 AM WEDNESDAY FOR THE EAST COLUMBIA RIVER GORGE, THE JOHN DAY BASIN, THE FOOTHILLS OF THE SOUTHERN BLUE MOUNTAINS OF OREGON, THE LOWER COLUMBIA BASIN, THE FOOTHILLS OF THE NORTHERN BLUE MOUNTAINS OF OREGON, NORTH CENTRAL OREGON, AND CENTRAL OREGON.
  • A HEAT ADVISORY IS IN EFFECT FROM 8 AM WEDNESDAY UNTIL 8 PM THURSDAY FOR THE EAST SLOPES OF THE OREGON CASCADES.
  • AN AIR QUALITY ALERT IS IN EFFECT UNTIL 11 PM FRIDAY FOR THE SOUTH CENTRAL OREGON CASCADES, THE SOUTHERN OREGON CASCADES, THE SISKIYOU MOUNTAINS, THE KLAMATH BASIN, NORTHERN AND EASTERN KLAMATH COUNTY, WESTERN LAKE COUNTY, AND KLAMATH COUNTY.

HEALTH ADVISORIES:

  • THE OREGON HEALTH AUTHORITY HAS ISSUED A RECREATIONAL USE HEALTH ADVISORY FOR ODELL LAKE IN KLAMATH COUNTY DUE TO THE PRESENCE OF CYANOBACTERIA (HARMFUL ALGAE) BLOOM THAT HISTORICALLY PRODUCES CYANOTOXINS (HARMFUL ALGAE TOXINS) ABOVE RECREATIONAL GUIDELINE VALUES FOR HUMAN EXPOSURE. UNTIL THE ADVISORY IS LIFTED PEOPLE SHOULD AVOID SWIMMING AND HIGH-SPEED WATER ACTIVITIES, SUCH AS WATER SKIING OR POWER BOATING, IN AREAS OF THE LAKE WHERE BLOOMS ARE IDENTIFIED. ALTHOUGH TOXINS ARE NOT ABSORBED THROUGH THE SKIN, PEOPLE WITH SKIN SENSITIVITIES MAY EXPERIENCE A PUFFY RED RASH. VISITING ODELL LAKE IS SAFE AS LONG AS ANY BOATING OR OTHER ACTIVITIES DO NOT CAUSE EXCESSIVE WATER SPRAY WHICH COULD LEAD TO INHALATION RISKS IF THERE IS EXCESSIVE WATER SPRAY.

 

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THE WEATHER PATTERN:

  • An Upper Level High Pressure Ridge (Shaded “Arch” shape with arrows) seriously turned up the heat. Now we ride the temperature roller coaster up and down The graphics for days 1-3 show a frontal system sliding in Wednesday. The graphics for days 3-7 Friday through next Tuesday show frontal systems moving through the Pacific Northwest between Friday and Saturday. Yet another complex frontal system will be moving in next Tuesday.

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THE AIR QUALITY INDEX:

For the local area:

Eugene/Springfield: The Air Quality Index is 25 in the Good category measuring Ozone.

Oakridge: The Air Quality Index is 38 in the Good category measuring Particulate Matter.

Cottage Grove: The Air Quality Index is 24 in the Good category measuring Particulate Matter.

Data courtesy of Lane Regional Air Protection Agency (LRAPA)

 

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FORECASTS:

Forecast for the Southern Willamette Valley including Eugene-Springfield:

  • Mostly clear tonight,
  • Mostly sunny and a bit cooler Wednesday, partly cloudy Wednesday night,
  • Mostly sunny and a bit cooler Thursday, partly cloudy late at night,
  • Then partly cloudy and a bit cooler Friday, partly cloudy Friday night.
  • lows 56-54 warming back to 56 Friday night highs 92-84.
  • Partly cloudy Saturday and Saturday night,
  • Partly cloudy Sunday and at night,
  • Partly cloudy and a bit cooler Monday, mostly clear Monday night,
  • Then mostly sunny and a bit warmer Tuesday.
  • highs 84-82 warming back to 84 Tuesday lows 56-52. (seasonal averages high 84 low 52)

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Eugene-Springfield Pollen Count:

Grass………. MODERATE (5)

Trees………. LOW (7)

Last Counted: 7/27/20

Data Courtesy of Oregon Allergy Associates

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Forecast for the Umpqua Valley including Roseburg:

  • Mostly clear with haze late tonight,
  • Sunny and hazy Wednesday, mostly clear and hazy late Wednesday night,
  • Sunny and hazy and a bit cooler Thursday, mostly clear and hazy at night,
  • Morning haze, sunny and a bit cooler Friday afternoon, then partly cloudy Friday night.
  • lows near 60 highs 96-88.
  • Partly cloudy and a bit cooler Saturday, mostly clear Saturday night,
  • AM sun, partly cloudy Sunday afternoon, mostly clear at night,
  • Mostly sunny and a bit cooler Monday, mostly clear Monday night,
  • Then mostly sunny Tuesday.
  • highs 87-84 lows near 58. (seasonal averages high 86 low 57)

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

  • Partly cloudy tonight with patchy coastal fog late tonight,
  • Patchy AM coastal fog, otherwise sunny and a bit warmer Wednesday afternoon, mostly clear Wednesday night with patchy coastal fog late,
  • Patchy AM and late night coastal fog, sunny and a bit cooler Thursday afternoon, partly cloudy at night,
  • AM clouds, partly cloudy and a bit warmer Friday afternoon, then patchy fog late Friday night.
  • lows near 52 highs 72-70 warming back to 72 Friday.
  • Patchy AM and late night fog otherwise partly cloudy Saturday and night,
  • Partly cloudy Sunday, mostly clear in the evening, partly cloudy late at night,
  • AM clouds, sunny Monday afternoon, mostly clear Monday night,
  • Then mostly sunny Tuesday.
  • highs near 72  lows near 52 (seasonal averages high 65 low 53)

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Forecast for the Northern Oregon Cascades including Willamette Pass:

  • Mostly clear tonight,
  • AM sun, partly cloudy and a bit warmer Wednesday afternoon, a slight (20%) chance of evening showers and thunderstorms, just partly cloudy late Wednesday night,
  • Mostly sunny Thursday, partly cloudy late at night,
  • AM sun, partly cloudy and cooler Friday afternoon, then partly cloudy Friday night.
  • free air freezing level 14,000 ft. late tonight, 15,000 ft. Wednesday, snow level above 8,000 ft. Wednesday night, free air freezing level 15,000 ft. Thursday through Friday night.
  • lows 58-49 highs 82-77.
  • Partly cloudy and a bit cooler Saturday, partly cloudy Saturday night,
  • AM sun, partly cloudy and a bit cooler Sunday, partly cloudy at night,
  • Some AM clouds, mostly sunny and a bit cooler Monday afternoon, mostly clear Monday night,
  • Then sunny and a bit warmer Tuesday.
  • free air freezing level 15,000 ft. Saturday through Sunday night, 14,000 ft. Monday, then 15,000 ft. Monday night and Tuesday afternoon.
  • highs 74-69 warming to 72 Tuesday lows 49-45.

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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 change due to unexpected changes in atmospheric conditions, so there are no guarantees that the actual weather will conform to the projected forecast.

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

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