TIM CHUEY WEATHER

May 19, 2022

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

• No Advisories at this time.

HEALTH ADVISORIES

• A PERMANENT RECREATIONAL HEALTH ADVISORY IS IN EFFECT FOR THE SOUTH UMPQUA RIVER AND MAINSTEM UMPQUA RIVER. THE ADVISORY COVERS THE SOUTH UMPQUA RIVER FROM CANYONVILLE DOWNSTREAM TO THE CONFLUENCE OF THE MAINSTEM UMPQUA RIVER, AND THE MAINSTEM UMPQUA RIVER DOWNSTREAM PAST ELKTON TO LAWSON BAR. PEOPLE IN THE BEDROCK ALONG THE RIVERS EDGE ARE ARE KNOWN TO DEVELOP CYANOBACTERIA (BLUE-GREEN ALGAE) BLOOMS THAT CAN BE HARMFUL TO PETS AND PEOPLE IF ACCIDENTAL INGESTION OCCURS. SIGNS HAVE BEEN POSTED AT SEVERAL ACCESS AREAS ALONG THE RIVER.

THE WEATHER PATTERN

• The Upper Level Airflow (West to East) is going to give us more sunshine for one more day. The graphics for days 1-3 show the frontal system that moved through Oregon today. The graphics for days 3-7  Sunday through Thursday show the frontal system that will slide through the Pacific Northwest between Monday and Tuesday, then another front is well offshore next Wednesday then pushing through.

Forecast for the South Willamette Valley including Eugene-Springfield:

• A mix of clouds and sun and a bit cooler with a good (50%) chance of showers today (under 0.10 in. of rain possible), just partly cloudy tonight,
• Partly cloudy and a bit warmer Friday, mostly clear at night,
• Mostly sunny and a bit warmer Saturday, then mostly clear Saturday  night.
• highs 58-72 lows 38-45.
• Partly cloudy and a bit warmer Sunday and Sunday night,
• Partly cloudy and a bit warmer with a slight (20%) chance of showers Monday afternoon and evening, just mostly cloudy at night,
• A mix of clouds and sun and a bit cooler with a slight (20%) chance of showers Tuesday, partly cloudy with a slight (20%) chance of evening showers, just mostly cloudy late Tuesday night,
• Then a mix of clouds and sun Wednesday.
• highs 72-74 cooling 69 Tuesday and Wednesday lows 47-49. (Seasonal Averages high 69 low 45)

Forecast for the Umpqua Valley including Roseburg:

• Mostly cloudy with a slight (20%) chance of AM showers, partly cloudy with a slight (20%) chance of showers and a bit cooler this afternoon (snow level 3,000 ft.), partly cloudy this evening, just mostly clear late tonight,
• Sunny and a bit warmer Friday, mostly clear at night,
• Mostly sunny and a bit warmer Saturday, then mostly clear Saturday night.
• highs 60-73 lows 40-46.
• Partly cloudy and a bit warmer Sunday, partly cloudy Sunday night,
• Partly cloudy and a bit cooler Monday, partly cloudy at night,
• Mostly cloudy with a slight (20%) chance of AM showers, partly cloudy and a bit cooler Tuesday afternoon, mostly cloudy Tuesday night,
• Then mostly cloudy Wednesday.
• highs 76-72 lows 49-52. (Seasonal Averages high 72 low 49).

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

• Mostly cloudy with a slight (20%) chance of AM showers, partly cloudy and a bit cooler with a slight (20%) chance of coastal showers this afternoon, partly cloudy in the evening,  just mostly clear late tonight,
• Sunny and a bit warmer Friday, mostly clear at night,
• Some AM clouds, sunny and a bit warmer Saturday afternoon, then partly cloudy Saturday night.
• highs 58-63 lows 42-45.
• Partly cloudy Sunday, partly cloudy Sunday night,
• Partly cloudy and a bit cooler Monday, mostly cloudy at night,
• Mostly cloudy with a slight (20%) chance of AM showers, just mostly cloudy Tuesday afternoon and Tuesday night,
• Then mostly cloudy Wednesday.
• highs 64-66 cooling to 63 Tuesday warming to 65 Wednesday lows 46-48. (Seasonal Averages high 61 low 49)

Forecast for the Northern Oregon Cascades including Willamette Pass:

• Mostly cloudy with a good (50%) chance of AM rain and snow showers, rain and snow showers likely (70%) and a bit cooler this afternoon (0.10 in. of rain possible, 1 in. of snow possible), mostly cloudy with a slight (20%) chance of evening rain and snow showers, just partly cloudy late tonight,
• Mostly sunny and a bit warmer Friday, just mostly clear at night,
• Partly cloudy and a bit warmer Saturday, then partly cloudy Saturday night.
• snow level 3,500 ft. rising to 4,000 ft. this afternoon, 4,000 ft. this evening, free air freezing level 4,000 ft. rising to 6,000 ft. Friday afternoon, 7,500 ft. late Friday night, 7,500 ft. rising to 8,000 ft. Saturday afternoon, then 8,000 ft. Saturday night.
• lows 30-26 warming to 34 Saturday night highs 38-57.
• Partly cloudy and a bit warmer Sunday and Monday, partly cloudy both nights,
• A mix of clouds and sun and a bit cooler with a slight (20%) chance of showers Tuesday, partly cloudy with a slight (20%) chance of evening showers, just partly cloudy late Tuesday night,
• Then a mix of clouds and sun Wednesday.
•  free air freezing level 8,000 ft. rising to 9,000 ft. Sunday afternoon, 10,000 ft. rising to 11,000 ft. late Sunday night, 11,000 ft. Monday, 10,000 ft. Monday night, snow level above 8,000 ft. Tuesday and Tuesday night, then free air freezing level 12,000 ft. falling to 11,000 ft. Wednesday afternoon.
• highs 58-62 cooling to 59 Tuesday and Wednesday lows 37-40.