TIM CHUEY WEATHER

September 27, 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

• NONE AT THIS TIME

HEALTH ADVISORIES

• A RECREATIONAL USE HEALTH ADVISORY IS IN EFFECT FOR LAKE  EWAUNA IN KLAMATH 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 LAKE AND SLOUGH 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 AREA 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.DO NOT DRINK THE WATER.
• A RECREATIONAL USE HEALTH ADVISORY HAS BEEN EXPANDED FOR THE AREA FROM THE ROSS ISLAND LAGOON TO RIVERPLACE MARINA IN MULTNOMAH 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 LAKE AND SLOUGH 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 AREA AND ENJOY ACTIVITIES SUCH AS CATCH AND RELEASE 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. DRINKING WATER FROM THE LAKE IS ESPECIALLY DANGEROUS.
• A RECREATIONAL USE HEALTH ADVISORY IS IN EFFECT FOR THE WILLAMETTE RIVER FROM ROSS ISLAND DOWNSTREAM (NORTH) TO THE AREA NEAR CATHEDRAL PARK IN PORTLAND, IN MULTNOMAH 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 LAKE AND SLOUGH 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 AREA 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.DO NOT DRINK THE WATER.
• A RECREATIONAL USE HEALTH ADVISORY ICONTINUES IN EFFECT FOR ARRONS LAKE, BUT HAS BEEN LIFTED FOR PETE’S SLOUGH AND STURGEON LAKE ON SAUVIE ISLAND 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 LAKE AND SLOUGH 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 AREA 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 RECREATIONAL USE HEALTH ADVISORY IS IN EFFECT FOR AGENCY LAKE AND EXTENDED THE ADVISORY FOR THE SOUTHERN PORTION OF UPPER KLAMATH LAKE, FROM HOWARD’S BAY SOUTH TO THE LINK RIVER DAM  IN KLAMATH 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 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

Upper Level Low Pressure sends a series of frontal systems our way bringing much needed rain. The graphics for days 1-3  show the cold front that moved through Oregon Tuesday and the next one due Thursday. The graphics for days 3-7    Saturday through Wednesday show a frontal system that will move toward the Pacific Northwest next Tuesday and pushing through Oregon next Wednesday.

.

Forecast For The South Willamette Valley Including Eugene-Springfield:

• Mostly cloudy with AM rain and a slight (20%) chance of thunderstorms, rain and a bit cooler this afternoon (under 0.10 in. of rain possible, more in storms), mostly cloudy with a good (50%) chance of evening rain, partly cloudy with a good (50%) chance of rain late tonight (under 0.10 in. of rain possible),
• Mostly cloudy with a good (50%) chance of AM showers, showers likely (70%) and a bit warmer Thursday afternoon (under 0.10 in. of rain possible) and at night (0.10 in. of rain possible),
• Mostly cloudy with AM showers likely (70%), mostly cloudy with a good (50%) chance of showers and a bit cooler Friday afternoon, partly cloudy with a (40%) chance of evening showers, then just partly cloudy late Friday night.
• highs 66-68 cooling to 64 Friday night lows 46-49 cooling to 42 Friday night.
• Mostly sunny and a bit warmer with a slight (20%) chance of showers Saturday afternoon, becoming mostly clear Saturday night,
• Mostly sunny and a bit warmer Sunday, partly cloudy at night,
• A mix of clouds and sun partly cloudy with a slight (20%) chance of rain and a bit warmer Monday afternoon, a (40%) chance of rain Monday night,
• Then a mix of clouds and sun and a bit warmer with a slight (20%) chance of rain Tuesday.
• highs 65-70 lows 42-50. (seasonal averages high 74 low 46)

Forecast for the Umpqua Valley including Roseburg:

• Mostly cloudy with AM showers and a slight (20%) chance of thunderstorms, partly cloudy and slightly cooler with a good (50%) chance of showers this afternoon (under 0.10 in. of rain possible), partly cloudy with a (30%) chance of showers tonight with patchy fog late,
• Patchy AM fog, mostly cloudy and a bit warmer with a (30%) chance of showers Thursday (under 0.10 in. of rain possible), a good (50%) chance of evening showers, showers likely (70%) late at night (under 0.10 in. of rain possible),
• Mostly cloudy with showers likely (70%) and a bit cooler Friday, mostly cloudy with a good (50%) chance of evening showers, then partly cloudy with a (30%) chance of showers late Friday night.
• highs 69-72 cooling to 65 Friday lows 48-52 cooling to 45 Friday night.
• A slight (20%) chance of AM showers, sunny and a bit warmer Saturday afternoon, mostly clear Saturday night,
• Mostly sunny and a bit warmer Sunday, mostly clear in the evening, partly cloudy late at night,
• Mostly cloudy and a bit warmer with a slight (20%) chance of showers Monday afternoon, mostly cloudy with a slight (20%) chance of evening showers, partly cloudy with a slight (20%) chance of showers late Monday night,
• Partly cloudy with a slight (20%) chance of AM showers, then just partly cloudy Tuesday afternoon.
• highs 66-72 lows 45-52. (seasonal averages high 76 low 50)

Forecast for the Oregon Coast including Coos Bay and North Bend:

• Mostly cloudy with a good (50%) chance of coastal showers and a slight (20%) chance of thunderstorms while inland AM showers  likely (70%) today while AM inland showers likely (70%) with a slight (20%) chance of inland thunderstorms, a (50%) chance of showers this afternoon (under 0.10 in. of rain possible), partly cloudy with a (30%) chance of showers with patchy fog late tonight (under 0.10 in. of rain possible),
• Patchy AM fog, mostly cloudy with a (40%) chance of coastal showers while a (30%) chance of inland showers Thursday afternoon (under 0.10 in. of rain possible), coastal showers likely (70%) at night while a good (50%) chance of evening inland showers likely (70%) late at night patchy fog late at night (under 0.10 in. of rain possible),
• Mostly cloudy with AM showers likely (70%), a bit cooler with a good (50%) chance of showers Friday afternoon, mostly cloudy with a (40%) chance of evening showers, then becoming mostly clear with a (30%) chance of showers late Friday night.
• highs 70-67 lows 49-52 cooling to 47 Friday night.
• Sunny and a bit warmer with a slight (20%) chance of showers Saturday, mostly clear Saturday night,
• Mostly sunny and a bit warmer Sunday, partly cloudy at night,
• Partly cloudy with a slight (20%) chance of showers Monday afternoon, mostly cloudy with a slight (20%) chance of showers Monday night,
• Then partly cloudy and a bit warmer with a slight (20%) chance of showers Tuesday.
•  highs 68-72 lows 48-53. (seasonal averages high 66 low 50)

Forecast for the Northern Oregon Cascades including Willamette Pass:

• Mostly cloudy with AM rain, a bit cooler with rain likely (70%) this afternoon, a (40%) chance of evening rain, a slight (20%) chance of rain late tonight,
• A mix of clouds and sun and a bit warmer with a good (50%) chance of showers Thursday, mostly cloudy with a good (50%) chance of evening showers, showers likely (70%) late at night,
• Mostly cloudy with showers likely (70%) and a bit cooler Friday, mostly cloudy with a (0%) chance of evening showers, then partly cloudy with a slight (20%) chance of rain and snow showers late Friday night,
• snow level 6,500 ft. today through Thursday, 7,000 ft. Thursday night, 6,500 ft. Friday, then 6,000 ft.  Friday night.
• highs 46-52 cooling back to 46 Friday night lows 35-37 cooling to 32 Friday night.
• Mostly cloudy with a slight (20%) chance of AM showers, partly and a bit warmer with a slight (20%) chance of showers Saturday and Saturday night,
• Partly cloudy and a bit warmer with a slight (20%) chance of showers Sunday, partly cloudy with a slight (20%) chance of showers at night,
• Partly cloudy and a bit warmer with a slight (20%) chance of rain Monday, mostly cloudy with a (40%) chance of evening rain, partly cloudy with a (40%) chance of rain late Monday night,
• Then partly cloudy with a slight (20%) chance of rain Tuesday.
• snow level  6,000 ft. Saturday, 6,500 ft. Saturday night, 7,500 ft. Sunday, above then 8,000 ft. Sunday night through Tuesday.
• highs 47-56 lows 33-39.