August 16, 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
- AN EXCESSIVE HEAT WARNING IS IN EFFECT UNTIL 11 PM TONIGHT FOR THE GREATER PORTLAND METRO AREA, THE CENTRAL WILLAMETTE VALLEY, THE SOUTH WILLAMETTE VALLEY, THE NORTHERN OREGON CASCADE FOOTHILLS, AND THE CASCADE FOOTHILLS IN LANE COUNTY.
- AN EXCESSIVE HEAT WARNING IS IN EFFECT UNTIL 10 PM THURSDAY FOR THE LOWER COLUMBIA, THE UPPER HOOD RIVER VALLEY, THE WESTERN COLUMBIA RIVER GORGE, AND THE CENTRAL COLUMBIA RIVER GORGE.
- A HEAT ADVISORY IS IN EFFECT UNTIL 11 PM WEDNESDAY FOR SISKIYOU MOUNTAINS AND THE SOUTH CENTRAL OREGON CASCADES.
- AN EXCESSIVE HEAT WARNING IS IN EFFECT UNTIL 11 PM TONIGHT FOR THE SOUTH CENTRAL OREGON COAST, THE CURRY COUNTY COAST, CENTRAL DOUGLAS COUNTY, EASTERN CURRY COUNTY, JOSEPHINE COUNTY, AND JACKSON COUNTY.
- AN EXCESSIVE HEAT WARNING IS IN EFFECT UNTIL 11 PM THURSDAY FOR THE EASTERN DOUGLAS COUNTY FOOTHILLS, AND THE SOUTH CENTRAL OREGON CASCADES.
- AN EXCESSIVE HEAT WARNING IS IN EFFECT UNTIL 11 PM THURSDAY THURSDAY FOR CENTRAL DOUGLAS COUNTY, EASTERN CURRY COUNTY AND JOSEPHINE COUNTY, AND JACKSON COUNTY.
- AN EXCESSIVE HEAT WARNING IS IN EFFECT UNTIL 11 PM THURSDAY FOR THE EASTERN DOUGLAS COUNTY FOOTHILLS AND THE SOUTH CENTRAL OREGON CASCADES.
- AN EXCESSIVE HEAT WARNING IS IN EFFECT UNTIL 11 PH THURSDAY FOR THE SISKIYOU MOUNTAINS AND THE SOUTHERN OREGON CASCADES.
- AN EXCESSIVE HEAT WARNING IS IN EFFECT UNTIL 11 PM THURSDAY 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 SOUTHERN BLUE MOUNTAINS OF OREGON, AND NORTH CENTRAL OREGON.
- A HEAT ADVISORY IS IN EFFECT UNTIL 10 PM THURSDAY FOR THE NORTHERN OREGON CASCADES, AND THE CASCADES IN LANE COUNTY.
- A HEAT ADVISORY IS IN EFFECT UNTIL 11 PM TONIGHT FOR THE EASTERN DOUGLAS COUNTY FOOTHILLS AND THE SOUTH CENTRAL OREGON CASCADES.
- A HEAT ADVISORY IS IN EFFECT UNTIL 11 PM THURSDAY FOR THE GRANDE RONDE VALLEY, WALLOWA COUNTY, THE NORTHERN BLUE MOUNTAINS OF OREGON, THE SOUTHERN BLUE MOUNTAINS OF OREGON, THE OCHOCO, THE JOHN DAY HIGHLANDS, WALLOWA COUNTY, THE EAST SLOPES OF THE OREGON CASCADES, CENTRAL OREGON, AND THE NORTHWEST BLUE MOUNTAINS.
- A HEAT ADVISORY IS IN EFFECT UNTIL 11 PM TONIGHT FOR THE KLAMATH BASIN, NORTHERN AND EASTERN KLAMATH COUNTY, AND WESTERN LAKE COUNTY.
- A RED FLAG WARNING IS IN EFFECT UNTIL 11 PM TONIGHT FOR WIND AND LOW RELATIVE HUMIDITY FOR THE NORTH OREGON CASCADE FOOTHILLS AND THE MT. HOOD NATIONAL FOREST WEST OF CASCADE CREST.
- A RED FLAG WARNING IS IN EFFECT UNTIL 11 PM TONIGHT FOR ABUNDANT LIGHTNING ON DRY FUELS FOR THE SOUTHERN OREGON CASCADES, THE KLAMATH BASIN, AND THE FREMONT-WINEMA NATIONAL FOREST.
- A FIRE WEATHER WATCH IS IN EFFECT FROM THIS AFTERNOON THROUGH THIS EVENING FOR ABUNDANT LIGHTNING ON DRY FUELS FOR THE SOUTHERN OREGON CASCADES, THE KLAMATH BASIN, AND THE FREMONT-WINEMA NATIONAL FOREST.
- A FIRE WEATHER WATCH IS IN EFFECT FROM THURSDAY AFTERNOON THROUGH FRIDAY EVENING FOR GUSTY WINDS AND LOW RELATIVE HUMIDITY FOR THE EAST SLOPES OF THE NORTHERN OREGON CASCADES, AND THE LOWER COLUMBIA BASIN OF OREGON.
- AN AIR QUALITY ADVISORY FOR SMOKE IS IN EFFECT UNTIL 6 AM FRIDAY FOR THE SOUTH WILLAMETTE VALLEY, THE CASCADES FOOTHILLS IN LANE COUNTY, AND THE CASCADES IN LANE COUNTY.
- AN AIR QUALITY ADVISORY FOR SMOG IS IN EFFECT UNTIL 6 AM THURSDAY FOR THE SOUTH WILLAMETTE VALLEY, THE CASCADES FOOTHILLS IN LANE COUNTY, AND THE CASCADES IN LANE COUNTY.
- AN AIR QUALITY ADVISORY IS IN EFFECT UNTIL 6 AM THURSDAY FOR SMOG FOR THE GREATER PORTLAND METRO AREA AND THE CENTRAL WILLAMETTE VALLEY.
- AN AIR QUALITY ALERT IS IN EFFECT UNTIL 11 PM THURSDAY FOR KLAMATH COUNTY.
- AN AIR QUALITY ALERT IS IS IN EFFECT UNTIL 11 PM THURSDAY FOR DESCHUTES COUNTY.
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 PETSAn Upper Level Low Pressure Trough (“U” shape) offshore keeps our weather pattern stable with a bit above normal temperatures. The graphics for days 1-3 show a frontal system falling apart just to our north. The graphics for days 3-7 Tuesday through Saturday show a frontal system moving through Tuesday and Wednesday with another approaching the coast next Thursday and Friday. Haze and smoke have finally reached Eugene and Springfield. AND PEOPLE IF ACCIDENTAL INGESTION OCCURS. SIGNS HAVE BEEN POSTED ALONG SEVERAL ACCESS AREAS ALONG THE RIVER.
THE WEATHER PATTERN
- Upper Level Low Pressure off the California coast will help to slowly cool our Hot temperatures. The graphics for days 1-3 show no fronts moving into the Pacific Northwest, but one to our northwest Thursday. The graphics for days 3-7 Saturday through Wednesday show a frontal system moving into the Pacific Northwest Saturday. Then another cold front to our northwest next Tuesday.
Forecast For The South Willamette Valley Including Eugene-Springfield:
- Mostly sunny smoky and still hot, today, partly cloudy and hazy tonight,
- Partly cloudy and cooler, still very warm Thursday, partly cloudy at night,
- Partly cloudy and a bit cooler Friday, then mostly clear Friday night.
- highs 103-89 lows 62-54.
- Mostly sunny and a bit cooler Saturday, partly cloudy Saturday night,
- Mostly sunny Sunday, partly cloudy at night,
- Partly cloudy Monday, mostly clear Monday night,
- Then mostly sunny and a bit warmer Tuesday.
- highs 87-89 lows near56 (seasonal averages high 84 low 52)
Forecast for the Umpqua Valley including Roseburg:
- Sunny and a bit cooler, still Hot, today and hazy with areas of smoke and a slight (20%) chance of afternoon thunderstorms, partly cloudy with a slight (20%) chance of evening thunderstorms, just partly cloudy late tonight,
- Some AM clouds with a slight (20%) chance of showers, mostly cloudy and a bit cooler, still Hot with a slight (20%) chance of showers Thursday afternoon, mostly cloudy in the evening, then partly cloudy late Thursday night,
- Some AM clouds, sunny and a bit cooler Friday afternoon, then mostly clear Friday night.
- highs 104-92 lows 67-58.
- Mostly sunny and a bit cooler Saturday, mostly clear Saturday night,
- Mostly sunny and a bit cooler Sunday, mostly clear at night,
- Then mostly sunny Monday, mostly clear Monday night,
- Then mostly sunny and a bit warmer Tuesday.
- highs 89-92 lows near 58. (seasonal averages high 86 low 57)
Forecast for the Oregon Coast including Coos Bay and North Bend:
- Patchy coastal fog, sunny and a bit warmer this afternoon, mostly cloudy with patchy coastal fog late tonight,
- Patchy AM coastal fog, mostly cloudy and a bit cooler Thursday afternoon, mostly cloudy at night,
- AM clouds, sunny Friday afternoon, then mostly clear Friday night.
- highs 79-77 lows 59-55.
- Mostly sunny Saturday, mostly clear in the evening, partly cloudy late Saturday night,
- Some AM clouds, sunny Sunday afternoon, partly cloudy at night,
- Partly cloudy Monday, mostly clear Monday night,
- Then mostly sunny Tuesday.
- highs near 77 lows near 56. (seasonal averages high 67 low 54)
Forecast for the Northern Oregon Cascades including Willamette Pass:
- Mostly cloudy with areas of smoke today and hazy this afternoon, areas of smoke with a a slight (20%) chance of evening showers, just mostly cloudy late tonight,
- A mix of clouds and sun and a bit cooler with a slight (20%) chance of showers Thursday, partly cloudy with a slight (20%) chance of evening showers, just partly cloudy late at night,
- Partly cloudy and a bit cooler Friday, then mostly clear Friday night.
- free air freezing level 16,000 ft. late today and tonight, snow level above 8,000 ft. Thursday and Thursday night, then 14000 ft. Friday and Friday night.
- highs 92-77 lows 62-50.
- AM sun, partly cloudy and a bit cooler with a slight (20%) chance of showers and thunderstorms Saturday afternoon and evening, just partly cloudy late Saturday night,
- Partly cloudy and a bit cooler with a slight (20%) chance of showers Sunday and a slight (20%) chance of afternoon and evening thunderstorms, just partly cloudy late at night,
- Partly cloudy and a bit cooler with a slight (20%) chance of showers and thunderstorms Monday afternoon, partly cloudy Monday night,
- Then mostly sunny Tuesday.
- snow level above 8,000 ft. Saturday through Monday, free air freezing level 13,000 ft. Monday night, then 14,000 ft. Tuesday.
- highs 76-70 warming to 75 Tuesday lows 48-45 warming to 47 Monday night.
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