Aug
04.
An Upper Level High Pressure Ridge off the coast brings lots of heat and some wildfire smoke due to offshore airflow (west to east). The graphics for days 1-3 show a cold frontal system pushing through Oregon Saturday. The graphics for days 3-7 Friday through Tuesday show a cold frontal system pushing through the Pacific Northwest through the period until a front moves through Sunday and Monday.
ADVISORIES:
- A RED FLAG WARNING IS IN EFFECT UNTIL 9 PM TONIGHT FOR STRONG GUSTY WIND AND LOW RELATIVE HUMIDITY FOR THE WESTERN ROGUE BASIN INCLUDING THE THE ILLINOIS VALLEY, THE SISKIYOU MOUNTAINS, THE EASTERN ROGUE VALLEY, AND THE SOUTHERN OREGON CASCADES.
- A RED FLAG WARNING IS IN EFFECT FROM 2 PM UNTIL 9 PM TODAY FOR THE UMPQUA BASIN, AND THE UMPQUA NATIONAL FOREST.
- A RED FLAG WARNING IS IN EFFECT UNTIL 8PM TODAY FOR WIND AND LOW RELATIVE HUMIDITY FOR THE WESTERN COLUMBIA RIVER GORGE OF OREGON.
- A HEAT ADVISORY IS IN EFFECT UNTIL 11 PM TONIGHT FOR THE NORTH OREGON COAST RANGE LOWLANDS, THE CENTRAL OREGON COAST RANGE LOWLANDS, THE CENTRAL OREGON COAST RANGE LOWLANDS,THE LOWER COLUMBIA COLUMBIA RIVER, TUALATIN VALLEY, PORTLAND WEST HILLS AND CHEHALEM MOUNTAIN, INNER PORTLAND METRO, EAST PORTLAND METRO, SOUTHEAST PORTLAND METRO, WEST CENTRAL WILLAMETTE VALLEY, BENTON COUNTY LOWLANDS, AND THE LANE COUNTY LOWLANDS.
- A HEAT ADVISORY IS IN EFFECT UNTIL 11 PM TONIGHT FOR CENTRAL DOUGLAS COUNTY.
- A HEAT ADVISORY IS IN EFFECT FROM 11 AM TODAY UNTIL 11 PM THURSDAY FOR THE KLAMATH BASIN, NORTHERN AND EASTERN KLAMATH COUNTY AND LAKE COUNTY, AND CENTRAL AND EASTERN LAKE COUNTY.
- A HEAT ADVISORY IS IN EFFECT FROM 11 AM TODAY UNTIL 11 PM THURSDAY FOR EASTERN CURRY COUNTY AND JOSEPHINE COUNTY, AND JACKSON COUNTY.
- AN AIR QUALITY ADVISORY IS IN EFFECT UNTIL NOON TODAY FOR BAKER COUNTY, HARNEY COUNTY, AND MALHEUR COUNTY.
- AN AIR QUALITY ADVISORY IS IN EFFECT UNTIL FURTHER NOTICE FOR BENTON, CLACKAMAS, COLUMBIA, HOOD RIVER, LANE, LINN, MARION, MULTNOMAH, POLK, WASHINGTON, AND YAMHILL COUNTY.
- AN AIR QUALITY ALERT IS IN EFFECT UNTIL FURTHER NOTICE FOR DOUGLAS COUNTY.
- AN AIR QUALITY ADVISORY IS IN EFFECT UNTIL 4 PM TODAY FOR KLAMATH AND LAKE COUNTIES.
- AN AIR QUALITY ADVISORY IS IN EFFECT UNTIL FURTHER NOTICE FOR CROOK, DESCHUTES, GILLIAM, GRANT, JEFFERSON, MORROW, SHERMAN, UMATILLA, UNION, WALLOWA, WASCO COUNTIES, AND WHEELER COUNTIES.
HEALTH ADVISORIES:
- 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.
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SKI REPORT:
Willamette Pass Ski: IT’S NOT OFFICIAL, BUT DUE TO THE LATENESS OF THE SEASON AND THE MILD WEATHER TREND THERE IS VIRTUALLY NO CHANCE OF GETTING ENOUGH SNOWFALL TO ALLOW OPENING FOR SKIING. CONSIDER IT CLOSED FOR THE SEASON.
Hoodoo Ski: IS CLOSED FOR THE SEASON.
Mt. Ashland Ski: IS CLOSED FOR THE SEASON.
Be sure to check their web pages for the latest updates.
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Air Quality Index:
Eugene/Springfield: The Air Quality Index is 184 in the Unhealthy category measuring Particulate Matter.
Oakridge: The Air Quality Index is 96 in the Unhealthy for Sensitive Groups category measuring Particulate Matter.
Cottage Grove: The Air Quality Index is 161 in the Unhealthy category measuring Particulate Matter.
Data courtesy of Lane Regional Air Protection Agency (LRAPA.org)
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Forecast for the Southern and lower Mid Willamette Valley including Eugene-Springfield and Albany-Corvallis:
- Sunny and a bit warmer (Hot) with widespread smoke today, clear with areas of smoke tonight,
- Sunny and slightly cooler (Still Hot) Thursday, clear at night,
- Sunny and a bit cooler (Still Very Warm) Friday, then clear Friday night.
- highs 98-94 lows 59-58.
- Sunny and a bit cooler Saturday, clear Saturday night,
- Sunny and a bit cooler Sunday, mostly clear at night,
- Sunny Monday, mostly clear Monday night,
- Then sunny and slightly warmer Tuesday.
- highs 92-85 warming to lows 56-55. (seasonal averages high 86 low 52)
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EUGENE-SPRINGFIELD POLLEN COUNT:`
GRASS POLLEN: ABSENT (0)
TREE POLLEN: ABSENT (0)
WEEDS: LOW (0)
Measured 7.30.26
NOTE: DATA FROM OREGON ALLERGY ASSOCIATES.
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Forecast for the Umpqua Valley including Roseburg:
- Widespread AM and early afternoon smoke, sunny and Hot this afternoon, widespread evening and late evening smoke, clear late tonight,
- Sunny and a bit cooler, still Hot Thursday, clear at night,
- Sunny and a bit warmer, Hot, Friday, then clear Friday night.
- highs 99-101 cooling back to 99 Thursday lows 63-62.
- Sunny and a bit cooler (still very warm) Saturday, clear Saturday night,
- Sunny and a bit cooler Sunday, clear at night,
- Sunny and a bit cooler Monday, mostly clear Monday night,
- Then sunny Tuesday.
- highs 96-86 lows 62-56. (seasonal averages high 87 low 58).
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Forecast for the South Oregon Coast Including Coos Bay and North Bend:
- Sunny and a bit cooler with patchy AM and early afternoon smoke, partly cloudy late this afternoon, becoming mostly cloudy late tonight,
- Mostly sunny and a bit cooler Thursday, mostly cloudy at night,
- Mostly sunny and a bit warmer Friday, then partly cloudy Friday night.
- highs 72-67 lows near 54.
- Mostly sunny Saturday, partly cloudy Saturday night,
- Sunny and a bit cooler Sunday, partly cloudy at night,
- Sunny Monday, partly cloudy Monday night,
- Then mostly sunny Tuesday.
- highs 68-65 lows 55-54 . (seasonal averages high 67 low 54).
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Forecast for the Northern Oregon Cascades including the Cascades in Lane County:
- Areas of AM smoke, sunny and a bit cooler with patchy smoke this afternoon, mostly clear with areas of smoke tonight,
- Sunny Thursday, mostly clear at night,
- Sunny and a bit cooler Friday, then mostly clear Friday night.
- free air freezing level above 16,000 ft. today through Thursday night, 16,000 ft. Friday, then above 16,000 ft. Friday night.
- highs 86-84 lows 56-54.
- Sunny and a bit cooler Saturday, mostly clear Saturday night,
- Sunny and a bit cooler Sunday, mostly clear at night,
- Sunny Monday, mostly clear Monday night,
- Then sunny and a bit cooler Tuesday.
- free air freezing level 16,000 ft. Saturday, above 16,000 ft. Saturday night, 16,000 ft. Sunday, above 16,000 ft. Sunday night, 16,000 ft. Monday and Monday night, then 15,000 ft. Tuesday.
- highs 80-74 lows 49-47.
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