Jul
19.
Here is my weekly weather quiz question. “What is the “Showalter Index?”
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An Upper Level Low is moving away from us but still producing sunshine with high temperatures in the 90s. The graphics for days 1-3 show a frontal system sliding into Oregon Friday. The graphics for days 3-7 Monday through Friday show a cold frontal system sliding into the Pacific Northwest Monday and another on Wednesday.
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Air Quality Index:
Eugene/Springfield: The Air Quality Index is 39 in the Good category measuring Ozone.
Oakridge: The Air Quality Index is 79 in the Moderate category measuring Particulate Matter.
Cottage Grove: The Air Quality Index is 50 in the Good category measuring Particulate Matter.
Data courtesy of Lane Regional Air Protection Agency (LRAPA.org)
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ADVISORIES:
- A RED FLAG WARNING IS IN EFFECT FROM 11 AM SATURDAY FOR DRY AND UNSTABLE CONDITIONS FOR THE SOUTHERN BLUE AND STRAWBERRY MOUNTAINS AND THE CENTRAL BLUE MOUNTAINS
- AN EXCESSIVE HEAT WARNING IS IN EFFECT FROM 11 AM SATURDAY UNTIL 10 PM MONDAY FOR THE EASTERN COLUMBIA RIVER GORGE OF OREGON, THE LOWER COLUMBIA BASIN OF OREGON, THE GRANDE RONDE VALLEY, WALLOWA COUNTY, THE NORTHERN BLUE MOUNTAINS OF OREGON, THE SOUTHERN BLUE MOUNTAINS OF OREGON, THE JOHN DAY BASIN, THE FOOTHILLS OF THE NORTHERN BLUE MOUNTAINS OF OREGON, AND THE FOOTHILLS OF THE SOUTHERN BLUE MOUNTAINS OF OREGON.
- A HEAT ADVISORY IS IN EFFECT FROM 11 AM SATURDAY UNTIL 8 PM MONDAY FOR THE OCHOCO, THE JOHN DAY HIGHLANDS, NORTH CENTRAL OREGON, AND CENTRAL OREGON.
- AN EXCESSIVE HEAT WARNING IS IN EFFECT UNTIL 11 PM MONDAY FOR BAKER COUNTY.
- A HEAT ADVISORY IS IN EFFECT FROM NOON MDT SATURDAY UNTIL MIDNIGHT MDT MONDAY NIGHT FOR HARNEY COUNTY.
- A HEAT ADVISORY IS IN EFFECT FROM 11 AM UNTIL 11 PM SATURDAY FOR THE KLAMATH BASIN, NORTHERN AND EASTERN KLAMATH COUNTY, AND WESTERN, CENTRAL, AND EASTERN LAKE COUNTY.
- AN EXCESSIVE HEAT WARNING IS IN EFFECT UNTIL MIDNIGHT MDT MONDAY FOR FOR MALHEUR COUNTY AND THE OREGON LOWER TREASURE VALLEY.
- A HEAT ADVISORY IS IN EFFECT FROM 11AM UNTIL 11 PM SATURDAY FOR THE INNER PORTLAND METRO, THE EAST PORTLAND METRO, THE EAST CENTRAL WILLAMETTE VALLEY, THE LINN COUNTY LOWLANDS, THE LANE COUNTY LOWLANDS, THE WESTERN COLUMBIA RIVER GORGE, THE I-84 CORRIDOR, THE UPPER HOOD RIVER VALLEY, AND THE CENTRAL COLUMBIA RIVER GORGE -I-84 CORRIDOR.
- A FIRE WEATHER WATCH IS IN EFFECT FROM SATURDAY AFTERNOON THROUGH SUNDAY EVENING FOR THUNDERSTORMS FOR THE CENTRAL COAST RANGE, THE SOUTHERN WILLAMETTE VALLEY, THE NORTHERN OREGON CASCADE FOOTHILLS, THE CENTRAL OREGON CASCADE FOOTHILLS, THE MT. HOOD NATIONAL FOREST REGION, THE NORTHERN WILLAMETTE FOREST, AND THE SOUTHERN WILLAMETTE FOREST.
- A FIRE WEATHER WATCH IS IN EFFECT FROM LATE SATURDAY NIGHT THROUGH SUNDAY EVENING FOR THUNDERSTORMS FOR THE NORTHERN AND CENTRAL WILLAMETTE VALLEY.
- A FIRE WEATHER WATCH IS IN EFFECT FROM SATURDAY AFTERNOON THROUGH SUNDAY MORNING ABUNDANT LIGHTNING ON DRY FUELS FOR THE SOUTH CENTRAL OREGON COAST, THE UMPQUA BASIN, THE UMPQUA NATIONAL FOREST, THE SOUTHERN OREGON COAST, THE WESTERN SISKIYOU NATIONAL FOREST, THE WESTERN ROGUE BASIN INCLUDING THE ILLINOIS VALLEY, THE EASTERN ROGUE VALLEY, AND THE SOUTHERN OREGON CASCADES.
- A FIRE WEATHER WATCH IS IN EFFECT FROM SUNDAY MORNING THROUGH LATE SUNDAY NIGHT FOR LIGHTNING FOR THE BURNS BLM AND THE VALE BLM.
- A FIRE WEATHER WATCH IS IN EFFECT FROM SATURDAY MORNING TO THROUGH SUNDAY EVENING FOR DRY AND UNSTABLE CONDITIONS FOR THE CENTRAL BLUE MOUNTAINS.
- AN AIR QUALITY ALERT IS IN EFFECT UNTIL 5 PM MONDAY FOR KLAMATH AND LAKE COUNTIES.
- AN AIR QUALITY ALERT IS IN EFFECT FROM 10 AM SATURDAY UNTIL MIDNIGHT SATURDAY NIGHT FOR UMATILLA COUNTY.
- AN AIR QUALITY ALERT IS IN EFFECT UNTIL 5 PM MONDAY FOR GRANT AND MORROW COUNTIES.
- AN AIR QUALITY ALERT IS IN EFFECT UNTIL 2 PM MONDAY FOR HARNEY AND MALHEUR 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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Forecast for the Southern and lower Mid Willamette Valley including Eugene-Springfield and Albany-Corvallis:
- Clear tonight,
- Sunny and a bit warmer Saturday, mostly clear in the evening, partly cloudy late Saturday night,
- Mostly sunny and a bit cooler Sunday, mostly clear at night,
- Mostly sunny and a bit cooler Monday, then mostly clear Monday night.
- lows 54-58 cooling back to 54 Sunday night highs 96-85.
- Sunny and a bit warmer Tuesday and Wednesday, clear both nights,
- Sunny and slightly cooler Thursday and Friday, clear Thursday night,
- Sunny Friday.
- highs 86-89 cooling to 88 Thursday and Friday lows near 52 (seasonal averages high 85 low 52)
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EUGENE-SPRINGFIELD POLLEN COUNT:
GRASS: LOW (3)
TREES: LOW (3)
WEEDS: ABSENT (0)
Measured 7.18.24
Data courtesy of Oregon Allergy Associates.
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Forecast for the Umpqua Valley including Roseburg:
- Clear this evening, partly cloudy late tonight,
- Some AM clouds, sunny and hot Saturday afternoon, partly cloudy with a slight (20%) chance of thunderstorms , mostly cloudy with a slight (20%) chance of thunderstorms late Saturday night,
- Mostly cloudy with a slight (20%) chance of AM thunderstorms, sunny and cooler Sunday afternoon, mostly clear at night,
- Some AM clouds, sunny and a bit warmer Monday afternoon, then clear Monday night.
- lows 59-62 cooling to 58 Sunday night highs 97-82 warming to 87 Monday.
- Sunny and a bit warmer Tuesday, mostly clear Tuesday night,
- Mostly sunny and a bit warmer Wednesday, mostly clear at night,
- Sunny and a bit cooler Thursday, clear Thursday night,
- Then sunny and a bit warmer Friday.
- highs 86-88 lows 54-56 (seasonal averages high 87 low 58)
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Forecast for The South Oregon Coast Including Coos Bay and North Bend:
- Clear with patchy late evening coastal fog and partly cloudy with patchy coastal fog late tonight while becoming mostly cloudy with patchy inland fog late tonight,
- AM clouds with patchy AM coastal fog while areas of AM inland fog, sunny and a bit cooler Saturday afternoon, mostly cloudy with a slight (20%) chance of thunderstorms at night with patchy coastal fog at night while patchy inland evening fog and areas of inland fog late Saturday night,
- Mostly cloudy with areas of AM fog and a slight (20%) chance of AM thunderstorms, mostly cloudy with patchy fog Sunday afternoon, mostly cloudy at night,
- Mostly cloudy with patchy AM fog, sunny Monday afternoon, then mostly clear Monday night
- lows 57-50 highs near 63.
- Mostly sunny and a bit warmer Tuesday, mostly clear Tuesday night,
- Mostly sunny Wednesday, mostly clear at night,
- Mostly sunny and a bit cooler Thursday, mostly clear Thursday night,
- Then mostly sunny and a bit warmer Friday.
- highs 72-70 warming back to 72 Friday lows near 50. (seasonal average high 67 low 54)
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Forecast for the Northern Oregon Cascades including the Cascades in Lane County:
- Clear tonight,
- Sunny and a bit warmer Saturday, mostly clear in the evening, partly cloudy late Saturday night,
- Sunny cooler Sunday, mostly clear at night,
- Sunny and a bit cooler Monday, then mostly clear Monday night.
- free air freezing level 16,000 ft. tonight, above 16,000 ft. Saturday and Saturday night, 16,000 ft. Sunday through Monday.
- lows 52-55 cooling to 45 Monday night highs 93-80.
- Sunny Tuesday, Tuesday night
- Sunny and a bit warmer Wednesday, clear at night,
- Sunny and a bit cooler Thursday,
- anda bit cooler Friday.
- free air freezing level 16,000 ft. Tuesday, above 16,000 ft. Tuesday night through Wednesday night, 16,000 ft. Thursday,
- highs 80-82 cooling back to 75 Friday lows 49-46.
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