Clear tonight, Trying this once again – a bit cooler Friday.

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Do It Often, With What?

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ADVISORIES:

  • A RED FLAG WARNING IS IN EFFECT UNTIL 8 PM FRIDAY FOR STRONG GUSTY WINDS AND LOW RELATIVE HUMIDITY FOR THE KLAMATH BASIN, 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 RED FLAG WARNING IS IN EFFECT THROUGH 2 AM FRIDAY FOR LIGHTNING FROM DRY THUNDERSTORMS AND GUSTY OUTFLOW WINDS FOR THE LOWER COLUMBIA BASIN OF OREGON, THE NORTHERN BLUE MOUNTAINS OF OREGON, THE WALLOWA DISTRICT, 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 FOR FRIDAY AFTERNOON AND 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 THIS EVENING 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 THIS EVENING 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 FOR THE LOWER COLUMBIA BASIN OF OREGON, 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 PM THIS EVENING FOR THE UPPER HOOD RIVER VALLEY, THE CENTRAL COLUMBIA RIVER GORGE, 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 Low Pressure Trough (Shaded “U” shape with arrows) will help bring cooler weather. Going to go with the computer models and forecast a bit cooler tomorrow just like I have done for the last two days. The graphics for days 1-3 show frontal activity  Friday and Saturday. The graphics for days 3-7 Sunday through next Thursday show a frontal system pushing through between Monday and Tuesday. Yet another complex frontal system will move over Vancouver Island next Thursday.

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THE AIR QUALITY INDEX:

For the local area:

Eugene/Springfield: The Air Quality Index is 20 in the Good category measuring Ozone.

Oakridge: The Air Quality Index is 30 in the Good category measuring Particulate Matter.

Cottage Grove: The Air Quality Index is 18 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:

  • Mostly clear tonight,
  • Partly cloudy and a bit cooler Friday through Saturday night,
  • Partly cloudy and a bit warmer Sunday, then partly cloudy Sunday night.
  • lows near 55 highs near 85.
  • Partly cloudy and a bit cooler Monday, partly cloudy Monday night,
  • Some AM clouds, mostly sunny and a bit warmer Tuesday afternoon, clear at night,
  • Sunny Wednesday, clear Wednesday night,
  • Then mostly sunny Thursday.
  • highs 80-86 cooling to 84 Thursday lows near 54. (seasonal averages high 84 low 52)

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Eugene-Springfield Pollen Count:

Grass………. LOW (2)

Trees………. LOW (0)

Last Counted: 7/30/20

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 Friday, evening haze, partly cloudy late Friday night,
  • Sunny and a bit cooler Saturday, clear at night,
  • Mostly sunny and a bit cooler Sunday, then mostly clear  Sunday night.
  • lows 60-58 warming back to 60 Sunday night highs 90-88.
  • Partly cloudy and a bit cooler with a slight (20%) chance of showers Monday, mostly clear Monday night,
  • Mostly sunny and a bit warmer Tuesday, clear at night,
  • Sunny and a bit warmer Wednesday, clear Wednesday night,
  • Then sunny Thursday.
  • highs 83-88 lows near 57. (seasonal averages high 86 low 57)

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

  • Becoming partly cloudy and hazy tonight,
  • Partly cloudy with patchy AM coastal fog while partly cloudy with AM inland haze, partly cloudy and a bit warmer Friday afternoon and evening, mostly cloudy late Friday night,
  • Partly cloudy Saturday, mostly clear in the evening, partly cloudy late at night,
  • Partly cloudy Sunday, then partly cloudy with patchy fog late Sunday night.
  • lows 52-55 highs near 72.
  • Partly cloudy with a slight (20%) chance of showers Monday, mostly clear Monday night,
  • Mostly sunny Tuesday and Wednesday, mostly clear both nights,
  • Some AM clouds, then mostly sunny Thursday.
  • highs near 72 lows 54-52 warming back to 54 Thursday (seasonal averages high 65 low 53)

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Forecast for the Northern Oregon Cascades including Willamette Pass:

  • Clear tonight,
  • Mostly sunny and cooler Friday, partly cloudy Friday night,
  • Mostly sunny and a bit cooler Saturday, mostly clear at night,
  • Mostly sunny and a bit cooler Sunday, then mostly clear Sunday night.
  • free air freezing level 16,000 ft. late tonight and Friday, 15,000 ft. Friday night and Saturday, 16,000 ft. Saturday night, 16,000 ft. falling to 15,000 ft. Sunday afternoon, then 15,000 ft. Sunday night.
  • lows 54-47 highs 79-75.
  • AM sun, partly cloudy and a bit cooler Monday afternoon, partly cloudy Monday night,
  • Mostly sunny and a bit warmer Tuesday, mostly clear at night,
  • Sunny and a bit warmer Wednesday, clear Wednesday night,
  • Then sunny Thursday.
  • free air freezing level 14,000 ft. Monday, 15,000 ft. Monday night and Tuesday, 15,000 ft. rising to 16,000 ft. Tuesday night, then 15,000 ft. Wednesday through Thursday.
  • highs 69-77 lows 43-48.

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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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