July 4, 2023
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
- A RED FLAG WARNING IS IN EFFECT UNTIL 6 PM WEDNESDAY FOR WIND AND LOW RELATIVE HUMIDITY FOR THE NORTH OREGON COAST RANGE, AND THE EAST SLOPES OF THE CENTRAL OREGON COAST RANGE.
- A RED FLAG WARNING IS IN EFFECT UNTIL 11 PM WEDNESDAY FOR WIND AND LOW RELATIVE HUMIDITY, AND UNSTABLE CONDITIONS FOR THE WILLAMETTE VALLEY.
- A RED FLAG WARNING IS IN EFFECT UNTIL 8 PM TONIGHT FOR STRONG GUSTY WIND AND LOW RELATIVE HUMIDITY FOR THE UMPQUA BASIN, THE WESTERN ROGUE BASIN INCLUDING THE ILLINOIS VALLEY AND AND THE EASTERN ROGUE VALLEY.
- A HEAT ADVISORY IS IN EFFECT UNTIL 11 PM WEDNESDAY FOR THE UPPER HOOD RIVER VALLEY, AND THE WESTERN COLUMBIA RIVER GORGE.
- A HEAT ADVISORY IS IN EFFECT UNTIL 11 PM WEDNESDAY FOR THE CURRY COUNTY COAST, EASTERN CURRY COUNTY AND JOSEPHINE COUNTY, JACKSON COUNTY, THE SOUTH CENTRAL OREGON CASCADES, THE KLAMATH BASIN, NORTHERN AND EASTERN KLAMATH COUNTY, AND WESTERN, CENTRAL, AND EASTERN LAKE COUNTY, THE SISKIYIOU MOUNTAINS, THE SOUTH CENTRAL OREGON CASCADES, AND THE SOUTHERN OREGON CASCADES.
- A HEAT ADVISORY IS IN EFFECT UNTIL 11 PM WEDNESDAY FOR NORTHERN OREGON CASCADE FOOTHILLS AND THE CASCADE FOOTHILLS IN LANE COUNTY.
- A HEAT ADVISORY IS IN EFFECT UNTIL 11 PM WEDNESDAY FOR THE GREATER PORTLAND METRO AREA AND THE CENTRAL WILLAMETTE VALLEY.
- A HEAT ADVISORY IS IN EFFECT UNTIL 11 PM WEDNESDAY FOR THE SOUTH WILLAMETTE VALLEY.
- A HEAT ADVISORY IS IN EFFECT UNTIL 7 PM WEDNESDAY FOR THE THE COAST RANGE OF NORTHWEST OREGON AND THE CENTRAL COAST RANGE OF OF WESTERN OREGON.
- A HEAT ADVISORY IS IN EFFECT UNTIL 11 PM WEDNESDAY FOR CENTRAL DOUGLAS COUNTY AND THE EASTERN DOUGLAS COUNTY FOOTHILLS.
HEALTH ADVISORIES
- A RECREATIONAL USE HEALTH ADVISORY IS IN EFFECT FOR GALESVILLE RESERVOIR IN DOUGLAS COUNTY DUE TO THE PRESENCE OF A CYANOBACTERIA BLOOM. PEOPLE SHOULD AVOID SWIMMING AND HIGH SPEED WATER ACTIVITIES, SUCH AS WATER SKIING OR POWER BOATING, IN AREAS OF THE RESERVOIR WHERE BLOOMS ARE, AS THE MAJOR ROUTE OF EXPOSURE IS INGESTION OF WATER. TOXINS ARE NOT ABSORBED THROUGH THE SKIN, HOWEVER, THOSE WITH SKIN SENSITIVITIES MAY GET A PUFFY RED RASH. THE OREGON HEALTH AUTHORITY ENCOURAGES PEOPLE TO VISIT THE GALESVILLE RESERVOIR AND ENJOY ACTIVITIES SUCH AS FISHING, CAMPING, HIKING, BILKING, PICNICKING, BIRD WATCHING, CANOEING, AND KAYAKING. BOATING IS SAFE AS LONG AS SPEEDS DO NOT CREATE EXCESSIVE WATER SPRAY.. SPRAYS COULD LEAD TO THE RISK OF INHALING CYANOTOXINS.
- 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 continuing to bring warmer air to the Pacific Northwest. No chance of the much needed rain. The graphics for days 1-3 show no frontal systems approaching the coast. The graphics for days 3-7 Friday through Tuesday show no fronts pushing into or through the Pacific Northwest during rest of the period.
- Note: Be prepared for temperatures from the upper 90s to 100 degrees again for tomorrow. Drink plenty of water and stay as cool as possible.
Forecast For The South Willamette Valley Including Eugene-Springfield:
- Clear and hazy late tonight,
- AM haze, sunny and Hot again Wednesday, clear Wednesday night,
- Sunny and cooler Thursday, mostly clear at night,
- Some AM clouds, sunny and a bit cooler Friday, then clear Friday night.
- lows 57-50 highs 97-82.
- Mostly sunny and a bit warmer Saturday and Sunday, clear both nights,
- Then sunny Monday and Tuesday, clear Monday night.
- highs 83-86 lows 49-52. (seasonal averages high 81 low 51)
Forecast for the Umpqua Valley including Roseburg:
- Clear tonight,
- Sunny and Hot Wednesday, clear Wednesday night,
- Sunny and cooler Thursday, mostly clear at night,
- Mostly sunny and a bit cooler Friday, then mostly clear Friday night.
- lows 62-56 highs 98-84.
- Mostly sunny and a bit warmer Saturday, clear Saturday night,
- Sunny and a bit cooler Sunday, clear at night,
- Then sunny Monday and Tuesday, clear Monday night.
- highs 86-84 warming to 89 Monday lows near 55. (seasonal averages high 83 low 56)
Forecast for the Oregon Coast including Coos Bay and North Bend:
- Mostly clear with patchy evening coastal fog and partly cloudy with patchy coastal fog late tonight while partly cloudy with patchy inland fog late tonight,
- Some AM clouds with patchy fog, sunny and a bit warmer Wednesday afternoon, partly cloudy in the evening, mostly cloudy with patchy inland fog late Wednesday night,
- Mostly cloudy and a bit cooler Thursday, a slight (20%) chance of evening coastal thunderstorms, mostly cloudy at night,
- Partly cloudy and a bit cooler Friday, then partly cloudy Friday night.
- lows 52-54 highs 70-67.
- Partly cloudy and a bit warmer Saturday, mostly clear Saturday night,
- Mostly sunny Sunday, partly cloudy at night,
- Partly cloudy Monday and Monday night,
- Some AM clouds, then sunny Tuesday afternoon.
- highs near 70 lows 50-53. (seasonal averages high 65 low 53)
Forecast for the Northern Oregon Cascades including Willamette Pass:
- Sunny and a bit warmer Wednesday, clear Wednesday night,
- Sunny and a bit cooler Thursday, clear at night,
- Mostly sunny and a bit cooler Friday, then clear Friday night.
- free air freezing level 15,000 ft. tonight and Wednesday, 15,000 ft. falling to 14,000 ft. Thursday afternoon, then 15,000 ft. Thursday night through Friday night.
- lows 52-44 highs 83-75.
- Then sunny Saturday through Tuesday, clear each night
- free air freezing level 14,000 ft. Saturday through Monday, 15,000 ft. Monday night, then 14,000 ft. Tuesday.
- highs near 75 lows near 45.