Partly cloudy overnight, slightly cooler, but still hot for your Thursday.

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

Do It Often, With What?

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 GUSTY WIND AND LOW RELATIVE HUMIDITY UNTIL 8 PM TODAY FOR THE EASTERN ROGUE VALLEY.
  • A RED FLAG WARNING IS IN EFFECT UNTIL 8 PM FRIDAY FOR STRONG GUSTY WINDS AND LOW RELATIVE HUMIDITY 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 FIRE WEATHER WATCH IS IN EFFECT FROM LATE TONIGHT THROUGH LATE THURSDAY NIGHT FOR LIGHTNING FROM DRY THUNDERSTORMS AND GUSTY OUTFLOW WINDS FOR THE LOWER COLUMBIA BASIN OF OREGON, THE NORTHERN BLUE MOUNTAINS OF OREGON, THE EAST SLOPES OF THE NORTHERN OREGON CASCADES, THE SOUTHERN BLUE AND STRAWBERRY MOUNTAINS, AND THE CENTRAL BLUE MOUNTAINS.
  • A FIRE WEATHER WATCH IS IN EFFECT FROM LATE TONIGHT THROUGH THURSDAY AFTERNOON FOR LIGHTNING FROM DRY THUNDERSTORMS AND GUSTY OUTFLOW WINDS FOR THE EAT SLOPES OF THE CENTRAL OREGON CASCADES, THE DESCHUTES NATIONAL FOREST, MINUS SISTERS RANGER DISTRICT, AND THE CENTRAL MOUNTAINS OF OREGON.
  • A FIRE WEATHER WATCH IS IN EFFECT FROM LATE TONIGHT THROUGH THURSDAY EVENING FOR THE EAST SLOPES OF THE NORTHERN OREGON CASCADES, THE SOUTHERN BLUE AND STRAWBERRY MOUNTAINS, AND THE CENTRAL BLUE MOUNTAINS.
  • A HEAT ADVISORY IS IN EFFECT UNTIL 8 PM THURSDAY FOR THE UPPER HOOD RIVER VALLEY, THE CENTRAL COLUMBIA RIVER GORGE, THE EAST SLOPES OF THE OREGON CASCADES.
  • AN EXCESSIVE HEAT WARNING IS IN EFFECT UNTIL 8 PM THURSDAY FOR THE EAST COLUMBIA RIVER GORGE, NORTH CENTRAL OREGON, CENTRAL OREGON, THE EAST SLOPES OF THE OREGON CASCADES.
  • AN EXCESSIVE HEAT WARNING IS IN EFFECT 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 REGON, AND CENTRAL OREGON.
  • A HEAT ADVISORY IS IN EFFECT 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 KLAMATH BASIN.

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, as we all know too well. The graphics for days 1-3 show a frontal system sliding Friday and another one behind it. The graphics for days 3-7 Saturday through next Wednesday show a frontal system pushing through Saturday. Yet another complex frontal system will move over us Tuesday with a front coming out of the Gulf of Alaska next Wednesday.

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THE AIR QUALITY INDEX:

For the local area:

Eugene/Springfield: The Air Quality Index is 18 in the Good category measuring Ozone.

Oakridge: The Air Quality Index is 33 in the Good category measuring Particulate Matter.

Cottage Grove: The Air Quality Index is 16 in the Good category measuring Ozone.

Data courtesy of Lane Regional Air Protection Agency (LRAPA)

 

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FORECASTS:

Forecast for the Southern Willamette Valley including Eugene-Springfield:

  • Becoming partly cloudy tonight,
  • Sunny and hopefully slightly cooler but still hot Thursday, clear Thursday night,
  • Mostly sunny and a bit cooler Friday, partly cloudy at night,
  • Then partly cloudy and a bit cooler Saturday and Saturday night.
  • lows 58-54 warming to 55 Friday night and Saturday night highs 92-84.
  • Mostly sunny and a bit warmer Sunday, partly cloudy Sunday night,
  • Partly cloudy and a bit cooler Monday, mostly clear at night,
  • Mostly sunny and a bit warmer Tuesday, clear Tuesday night,
  • Then sunny Wednesday.
  • highs 86-82 warming back to 86 Tuesday and Wednesday lows 57-52. (seasonal averages high 84 low 52)

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Eugene-Springfield Pollen Count:

Grass………. MODERATE (6)

Trees………. LOW (4)

Last Counted: 7/29/20

Data Courtesy of Oregon Allergy Associates

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Forecast for the Umpqua Valley including Roseburg:

  • Clear and hazy tonight,
  • Sunny and hazy and a bit cooler Thursday, clear and hazy Thursday night,
  • AM haze, sunny and a bit cooler Friday afternoon, mostly clear in the evening, partly cloudy late at night,
  • Mostly sunny and a bit warmer Saturday, then mostly clear Saturday night.
  • lows 62-58 highs 93-88.
  • Mostly sunny and a bit warmer Sunday, mostly clear  Sunday night,
  • Mostly sunny and a bit cooler Monday, mostly clear at night,
  • Mostly sunny Tuesday, clear Tuesday night,
  • Then sunny and a bit warmer Wednesday.
  • highs 89-85 warming to 87 Wednesday lows near 58. (seasonal averages high 86 low 57)

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

  • Mostly clear tonight with patchy coastal fog late and Thursday AM, sunny and a bit warmer Thursday afternoon, mostly clear Thursday night,
  • Some AM clouds with patchy coastal fog, mostly sunny and a bit warmer Friday afternoon, partly cloudy at night,
  • Partly cloudy and a bit warmer Saturday, mostly clear in the evening, then partly cloudy late Saturday night.
  • lows 54-52 warming back to 54 Friday night and Saturday night highs near 72.
  • Some AM clouds, sunny Sunday afternoon, partly cloudy with patchy fog late Sunday night,
  • Patchy AM fog, partly cloudy Monday afternoon, mostly clear at night,
  • Mostly sunny Tuesday and Wednesday, mostly clear Tuesday night.
  • highs near 72 lows 54-52 (seasonal averages high 65 low 53)

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Forecast for the Northern Oregon Cascades including Willamette Pass:

  • Partly cloudy with a slight (20%) chance of evening showers and thunderstorms, just partly cloudy late tonight,
  • Mostly sunny and slightly cooler with a slight (20%) chance of thunderstorms Thursday, clear Thursday night,
  • Mostly sunny and cooler Friday, partly cloudy at night,
  • Mostly sunny and a bit cooler Saturday, then mostly clear Saturday night.
  • snow level above 8,000 ft. tonight, free air freezing level 16,000 ft. falling to 15,000 ft. Thursday afternoon, 15,000 ft. rising to 16,000 ft. late Thursday night, 16,000 ft. Friday, 15,000 ft. Friday night and Saturday, then 16,000 ft. Saturday night.
  • lows 54-47 highs 84-78.
  • Mostly sunny and a bit cooler Sunday and Monday, mostly clear both nights,
  • Mostly sunny and a bit warmer Tuesday, mostly clear Tuesday night,
  • Then sunny and a bit warmer Wednesday.
  • free air freezing level 16,000 ft. falling to 15,000 ft. Sunday afternoon, then 15,000 ft. Monday through Wednesday.
  • highs 77-70 warming to 79 Wednesday lows 48-45.

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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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