TIM CHUEY WEATHER

May 28, 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 PUBLIC HEALTH ADVISORY IS IN EFFECT DUE TO UNSAFE LEVELS OF FECAL BACTERIA IN OCEAN WATERS AT NYE BEACH IN LINCOLN COUNTY. PEOPLE SHOULD AVOID DIRECT CONTACT WITH THE WATER IN THIS AREA UNTIL THE ADVISORY IS LIFTED. UNSAFE LEVELS OF FECAL BACTERIA CAN CAUSE DIARRHEA, STOMACH CRAMPS, SKIN RASHES, UPPER RESPIRATORY INFECTIONS, AND OTHER ILLNESSES. CHILDREN, THE ELDERLY, AND THOSE WITH COMPROMISED IMMUNE SYSTEM SHOULD USE EXTRA CAUTION AS THEY ARE MORE VULNERABLE TO ILLNESS FROM WATERBORNE BACTERIA. VISITORS SHOULD AVOID WADING IN NEARBY  CREEKS, POOLS OF WATER ON THE BEACH, OR IN DISCOLORED WATER, AND STAY CLEAR OF WATER RUNOFF FLOWING INTO THE OCEAN.
• 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

A weak Upper Level High Pressure Ridge  (“Arch” shape) offshore keeps the onshore airflow going.  The graphics for days 1-3  show a weak cold front moving over the Pacific Northwest Monday and Tuesday. The graphics for days 3-7  Wednesday through next Sunday show a frontal system hanging offshore for most of the week offshore.

Forecast For The South Willamette Valley Including Eugene-Springfield:

• Mostly clear tonight,
• Mostly sunny and a bit warmer Monday (Memorial Day), mostly clear Monday night,
• Some AM clouds, sunny and a bit cooler Tuesday afternoon, mostly clear at night,
• Mostly sunny and a bit cooler Wednesday, then mostly clear Wednesday night.
• lows 46-42 highs 80-70.
• Mostly sunny and a bit warmer Thursday, mostly clear Thursday night,
• Mostly sunny and a bit warmer Friday, clear at night,
• Sunny and a bit warmer Saturday, mostly clear Saturday night,
• Then partly cloudy and a bit warmer Sunday.
• highs 72-83 lows near 43-52.  (seasonal averages high 70 low 46)

Forecast for the Umpqua Valley including Roseburg:

• Mostly clear tonight,
• Sunny Monday (Memorial Day), mostly clear with patchy fog late Monday night,
• AM clouds, sunny and a bit cooler Tuesday aftern0on, mostly clear at night,
• Mostly sunny and a bit cooler Wednesday, then mostly clear Wednesday night.
• lows 52-46 highs 82-73.
• Mostly sunny and a bit warmer Thursday, mostly clear Thursday night,
• Sunny and a bit warmer Friday, clear at night,
• Mostly sunny and a bit warmer Saturday, mostly clear Saturday night,
• Then partly cloudy and a bit warmer Sunday.
• highs 74-85 lows 47-53. (seasonal averages high 73 low 50)

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

• Becoming mostly cloudy tonight with patchy inland fog late,
• AM clouds, sunny and a bit warmer Monday afternoon (Memorial Day), mostly cloudy with patchy evening and nighttime coastal fog while inland patchy fog late Monday night,
• AM clouds, sunny and a bit cooler Tuesday afternoon, mostly cloudy at night,
• Mostly sunny and a bit cooler Wednesday, then mostly clear Wednesday night.
• lows 46-44 highs 64-62.
• Mostly sunny Thursday, mostly clear Thursday night,
• Mostly sunny and a bit warmer Friday, mostly clear at night,
• Mostly sunny and a bit warmer Saturday, partly cloudy Saturday night,
• Then partly cloudy and a bit warmer Sunday.
• highs 62-66 lows 45-48. (seasonal averages high 62 low 50)

Forecast for the Northern Oregon Cascades including Willamette Pass:

• Partly tonight,
• Mostly sunny and a bit warmer Monday (Memorial Day), clear Monday night,
• AM sun, partly cloudy and a bit cooler Tuesday afternoon, mostly clear at night,
• Mostly sunny and a bit cooler Wednesday, then mostly clear Wednesday night.
• free air freezing level 12,000 ft. tonight through Monday night, 12,000 ft. falling to 11,000 ft. Tuesday, 11,000 ft. Tuesday night, then 10,000 ft. Wednesday and Wednesday night.
• lows 43-33 highs 69-60.
• Mostly sunny and a bit warmer Thursday, mostly clear Thursday night,
• Mostly sunny and a bit warmer Friday, clear at night,
• Sunny and a bit warmer Saturday, partly cloudy Saturday night,
• AM sun, then partly cloudy with a (30%) chance of rain Sunday afternoon.
• free air freeing level 10,000 ft. Thursday, 11,000 ft. Thursday night and Friday, 12,000 ft. Friday night, 13,000 ft. Saturday and Saturday night, then snow level above 8,000 ft. Sunday.
• highs 62-72 lows 35-44.