A big temperature drop today, but warming will return.

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 ABUNDANT LIGHTNING ON DRY FUELS FROM 11 AM UNTIL 11 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 FROM  THIS MORNING 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.
  • A HEAT ADVISORY IS IN EFFECT FROM NOON WEDNESDAY UNTIL 8 PM THURSDAY FOR THE JOHN DAY BASIN, THE FOOTHILLS OF THE SOUTHERN BLUE MOUNTAINS OF OREGON, NORTH CENTRAL OREGON, AND CENTRAL OREGON.

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. 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 Monday.

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THE AIR QUALITY INDEX:

For the local area:

Eugene/Springfield: The Air Quality Index is 39 in the Good category measuring Ozone.

Oakridge: The Air Quality Index is 26 in the Good category measuring Particulate Matter.

Cottage Grove: The Air Quality Index is 33 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

  • Sunny and quite a bit cooler today, mostly clear tonight,
  • Mostly sunny and a bit warmer Wednesday, partly cloudy at night,
  • Mostly sunny and a bit cooler Thursday, then partly cloudy Thursday night.
  • highs 89-92 cooling to 88 Thursday lows 55-53.
  • A mix of clouds and sun and a bit cooler Friday, partly cloudy Friday night and Saturday AM, mostly sunny and a bit warmer in the afternoon, partly cloudy Saturday night,
  • Partly cloudy Sunday and at night,
  • Then a mix of clouds and sun and a bit cooler Monday.
  • highs 82-84 cooling back to 82 Monday lows 54-56. (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:

  • Some AM clouds, sunny and a bit cooler today, clear tonight,
  • Sunny and a bit warmer Wednesday, mostly clear at night,
  • Sunny and a bit cooler Thursday, then mostly clear Thursday night.
  • highs 90-95 cooling to 92 Thursday lows 62-57.
  • Partly cloudy and a bit cooler Friday, mostly clear Friday night,
  • Mostly sunny and a bit warmer Saturday and Sunday, mostly clear Saturday night, partly cloudy Sunday night,
  • Then partly cloudy and a bit cooler Monday.
  • highs 84-88 cooling to 85 Monday lows 59-57 warming back to 59 Sunday night. (seasonal averages high 86 low 57)

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

  • Mostly cloudy with patchy AM coastal fog and partly cloudy and a bit warmer with patchy fog and a slight (20%) chance of afternoon coastal thunderstorms while AM clouds and sunny and a bit warmer inland this afternoon, becoming partly cloudy tonight with patchy coastal fog late tonight,
  • Patchy AM coastal fog, otherwise sunny and a bit warmer Wednesday afternoon, mostly clear at night with patchy coastal fog late,
  • Sunny Thursday, then partly cloudy with patchy fog late Thursday night.
  • highs 68-72 lows near 52.
  • AM clouds, partly cloudy Friday afternoon, patchy fog late Friday night,
  • Patchy AM and late night fog otherwise partly cloudy Saturday and night,
  • Partly cloudy Sunday and Sunday night,
  • AM clouds, then partly cloudy Monday.
  • highs near 72  lows 53-55. (seasonal averages high 65 low 53)

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Forecast for the Northern Oregon Cascades including Willamette Pass:

  • Mostly sunny and a bit cooler today, mostly clear tonight,
  • AM sun, partly cloudy and a bit warmer with a slight (20%) chance of showers and thunderstorms Wednesday afternoon and at night,
  • Mostly sunny and a bit cooler Thursday, then partly cloudy Thursday night.
  • free air freezing level 14,000 ft. today and late tonight, snow level above 8,000 ft. Wednesday and Wednesday night, then free air freezing level 15,000 ft. Thursday and Thursday night.
  • highs 80-82 cooling back to 80 Thursday lows 52-48.
  • Partly cloudy and cooler Friday, mostly clear Friday night,
  • Some AM clouds, sunny and a bit warmer Saturday afternoon, mostly clear at night,
  • Some AM clouds, mostly sunny and a bit warmer Sunday, partly cloudy Sunday night,
  • Then partly cloudy and a bit cooler Monday.
  • free air freezing level Friday, 14,000 ft. late Friday night, 15,000 ft. Saturday and Saturday night, 14,000 ft. Sunday afternoon through Monday.
  • highs 72-74 cooling to 70 Monday lows 45-47.

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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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