July 4, 2024
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 chance due to unexpected changes in atmospheric conditions, so there are no guarantees the the actual weather will conform to the projected forecast.
ADVISORIES
- AN EXCESSIVE HEAT WARNING IS IN EFFECT UNTIL 8 PM MONDAY FOR THE NORTH OREGON COAST RANGE LOWLANDS, THE CENTRAL OREGON COAST RANGE LOWLANDS, THE NORTHERN OREGON COAST RANGE, THE CENTRAL OREGON COAST RANGE, THE LOWER COLUMBIA RIVER, THE TUALATIN VALLEY, PORTLAND WEST HILLS AND CHEHALEM MOUNTAIN, INNER PORTLAND METRO, EAST PORTLAND METRO, OUTER SOUTHEAST PORTLAND METRO, THE WEST CENTRAL WILLAMETTE VALLEY, THE EAST CENTRAL WILLAMETTE VALLEY, THE BENTON COUNTY LOWLANDS, THE LINN COUNTY LOWLANDS, THE LANE COUNTY LOWLANDS, THE WEST COLUMBIA RIVER GORGE OF OREGON ABOVE 500 FT., THE WEST COLUMBIA RIVER GORGE, THE I-84 CORRIDOR, THE UPPER HOOD RIVER VALLEY, THE CENTRAL COLUMBIA GORGE I-84 CORRIDOR, THE CLACKAMAS COUNTY CASCADE FOOTHILLS, THE CASCADE FOOTHILLS OF MARION AND LINN COUNTIES, AND THE LANE COUNTY CASCADE FOOTHILLS.
- A HEAT ADVISORY IS IN EFFECT UNTIL 8 PM MONDAY FOR THE NORTH OREGON CASCADES, THE CASCADES OF MARION AND LINN COUNTIES, AND THE CASCADES OF LANE COUNTY.
- A HEAT ADVISORY IS IN EFFECT FROM NOON FRIDAY UNTIL 10 PM THURSDAY FOR THE JOHN DAY BASIN AND CENTRAL OREGON.
- A HEAT ADVISORY IS IN EFFECT UNTIL 10 PM THURSDAY FOR WALLOWA COUNTY.
- A EXCESSIVE HEAT WARNING IS IN EFFECT UNTIL 9 PM MONDAY FOR CENTRAL DOUGLAS COUNTY AND THE EASTERN DOUGLAS COUNTY FOOTHILLS.
- A HEAT ADVISORY IS IN EFFECT UNTIL 9 PM MONDAY FOR THE KLAMATH BASIN, NORTHERN AND EASTERN KLAMATH COUNTY, AND WESTERN, CENTRAL AND EASTERN LAKE COUNTY.
- AN EXCESSIVE HEAT WATCH IS IN EFFECT FROM SATURDAY AFTERNOON THROUGH WEDNESDAY AFTERNOON FORE HARNEY COUNTY, BAKER COUNTY, MALHEUR COUNTY, AND THE OREGON LOWER TREASURE VALLEY.
- AN EXCESSIVE HEAT WARNING IS IN EFFECT FROM NOON FRIDAY UNTIL 10 PM THURSDAY NIGHT FOR THE EASTERN COLUMBIA RIVER GORGE OF OREGON, THE LOWER COLUMBIA BASIN OF OREGON, THE JOHN DAY BASIN, THE FOOTHILLS OF THE NORTHERN BLUE MOUNTAINS OF OREGON, THE FOOTHILLS OF THE SOUTHERN BLUE MOUNTAINS OF OREGON, NORTH CENTRAL OREGON, AND CENTRAL OREGON.
- AN EXCESSIVE HEAT WARNING IS IN EFFECT UNTIL 9 PM MONDAY FOR EASTERN CURRY COUNTY AND JOSEPHINE COUNTY, AND JACKSON COUNTY.
- A FIRE WEATHER WATCH IS IN EFFECT FROM SATURDAY AFTERNOON THROUGH SATURDAY EVENING FOR WIND AND LOW RELATIVE HUMIDITY FOR THE EAST SLOPES OF THE CENTRAL OREGON CASCADES, THE DESCUTES NATIONAL FOREST, THE MINUS SISTERS RANGER DISTRICT, AND THE CENTRAL MOUNTAINS OF OREGON.
- A RED FLAG WARNING IS IN EFFECT FROM 4 PM UNTIL 8 PM FRIDAY FOR STRONG GUSTY WIND AND LOW RELATIVE HUMIDITY FOR THE UMPQUA BASIN, THE WESTERN ROGUE BASIN INCLUDING THE ILLINOIS VALLEY, THE SISKIYOU MOUNTAINS, THE EASTERN ROGUE VALLEY, AND THE SOUTHERN OREGON CASCADES.
- A FIRE WEATHER WATCH IS IN EFFECT FROM SATURDAY AFTERNOON THROUGH THROUGH SUNDAY EVENING FOR STRONG GUSTY WIND AND LOW RELATIVE HUMIDITY FOR THE UMPQUA BASIN, THE WESTERN ROGUE BASIN INCLUDING THE ILLINOIS VALLEY, THE SISKIYOU MOUNTAINS, THE EASTERN ROGUE VALLEY, AND THE SOUTHERN OREGON CASCADES.
- A FIRE WEATHER WATCH IS IN EFFECT FROM SATURDAY AFTERNOON THROUGH SUNDAY EVENING FOR STRONG GUSTY WIND AND LOW RELATIVE HUMIDITY FOR THE UMPQUA NATIONAL FOREST, THE KLAMATH BASIN, AND THE FREMONT-WINEMA NATIONAL FOREST.
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.
THE WEATHER PATTERN:
- An Upper Level High Pressure Ridge (“Arch” shape) strengthens again over us bringing more sunshine and heat. The graphics for days 1-3 show no frontal systems near the Pacific Northwest. The graphics for days 3-7 Sunday through Thursday show no frontal systems sliding into the Pacific Northwest through the period. There will be a cold front to our northwest next Wednesday then moving in next Wednesday.
- Note: Please be extra careful with fireworks. It’s very dry and we’ve already had some brush fires locally.
Forecast For The South Willamette Valley Including Eugene-Springfield:
- Mostly clear tonight,
- Sunny and warmer (HOT!) Friday, clear Friday night,
- Sunny and a bit warmer (VERY HOT!) Saturday, mostly clear at night,
- Sunny and a bit cooler (Still VERY HOT!) Sunday, then clear Sunday night.
- lows 57-60 cooling to 58 Sunday night highs 100-104.
- Then sunny and a bit cooler (Still Very Warm) Monday, Tuesday, Wednesday, and Thursday, clear each night,
- highs 102-90 lows 59-55 (seasonal averages high 81 low 51)
Forecast for the Umpqua Valley including Roseburg:
- Mostly clear tonight,
- Sunny and a bit warmer (VERY HOT) Friday and Saturday, clear both nights,
- Sunny and a bit cooler (Still VERY HOT) Sunday, then clear Sunday night.
- lows 62-66 cooling to 64 Sunday night highs 105-109 cooling to 106 Sunday night.
- Sunny and a bit cooler (STILL HOT) Monday, clear Monday night,
- Then sunny and a bit cooler Tuesday, Wednesday, and Thursday, clear each nights.
- highs 107-94 lows 63-60. (seasonal average high 83 low 56)
Forecast for the Oregon Coast including Coos Bay and North Bend:
- Variably cloudy this evening, mostly clear late tonight,
- Sunny and a bit warmer Friday, mostly clear Friday night,
- Mostly sunny Saturday, mostly clear at night,
- Mostly sunny and a bit cooler Sunday, then mostly clear Sunday night.
- lows 56-59 cooling to 53 Sunday night highs 85-77.
- Mostly sunny and a bit cooler Monday and Tuesday, mostly clear both nights,
- Then mostly sunny and a bit cooler Wednesday and Thursday, mostly clear Wednesday night,
- highs 78-72 lows 54-52. (seasonal average high 65 low 53)
Forecast for the Northern Oregon Cascades including Willamette Pass:
- Mostly clear tonight,
- Sunny and a bit warmer Friday, clear Friday night,
- Sunny Saturday, mostly clear at night,
- Sunny and a bit cooler Sunday, then clear Sunday night.
- free air freezing level above 16,000 ft. tonight through Sunday night.
- lows 54-59 cooling to cooling to 57 Saturday night and Sunday night highs 90-89.
- Sunny Monday, clear Monday night,
- Sunny and a bit warmer Tuesday, clear at night,
- Sunny and a bit cooler Wednesday,
- Then sunny and a bit warmer Thursday.
- free air freezing level above 16,000 ft. Sunday through Thursday.
- highs 89-90 cooling to 83 Thursday lows 57-52.