June 20, 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
- NONE AT THIS TIME.
- 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
An Upper Level High Pressure Ridge (“Arch” shape) will be bringing sunshine and warmer temperatures just in time as Summer begins. The graphics for days 1-3 show a frontal system approaching Oregon Wednesday. The graphics for days 3-7 Thursday through Monday show a cold front moving into the Pacific Northwest next Monday.
Forecast for the South Willamette Valley including Eugene-Springfield:
- Mostly clear tonight,
- Some AM clouds, sunny and warmer Tuesday (Summer Solstice), clear Tuesday night,
- AM sun, partly cloudy and a bit cooler Wednesday, mostly clear at night,
- Mostly sunny and a bit cooler Thursday, then clear Thursday night.
- lows 48-54 cooling back to 48 Thursday night highs 82-77.
- Sunny and a bit warmer Friday, clear Friday night,
- Mostly sunny and a bit warmer Saturday, clear at night,
- Mostly sunny Sunday, mostly clear Sunday night,
- AM sun, then partly cloudy an a bit cooler Monday afternoon.
- highs 82-89 cooling back to 82 Monday lows 53-58. (Seasonal Averages high 75 low 48)
Forecast for the Umpqua Valley including Roseburg:
- Mostly clear tonight,
- Sunny and a bit warmer Tuesday (Summer Solstice), clear Tuesday night,
- Sunny and a bit warmer Wednesday, mostly clear at night,
- Sunny and a bit cooler Thursday, clear Thursday night.
- lows 52-57 cooling back to 52 Thursday night highs 82-84 cooling to 78 Thursday.
- Sunny Friday, clear Friday night,
- Sunny and a bit warmer Saturday, clear Saturday night,
- Mostly sunny Sunday, mostly clear Sunday night,
- Then sunny Monday.
- highs 82-92 cooling to 85 Monday lows 56-62 cooling to 59 Sunday night. (Seasonal Averages high 77 low 53).
Forecast for the Oregon Coast including Coos Bay and North Bend:
- Mostly clear tonight,
- Sunny and a bit warmer Tuesday (Summer Solstice), mostly clear Tuesday night,
- Some AM clouds, sunny and a bit warmer Wednesday, mostly clear at night,
- Mostly sunny and a bit cooler Thursday, then clear Thursday night.
- lows 52-54 cooling back to 52 Thursday night highs 69-72 cooling back to 69 Thursday.
- Sunny and a bit warmer Friday and Saturday, mostly clear both nights,
- Mostly sunny and a bit cooler Sunday, mostly clear Sunday night,
- Some AM clouds, then sunny and a bit cooler Monday afternoon.
- highs 72-76 cooling back to 72 Monday lows 52-55 (Seasonal Averages high 64 low 52)
Forecast for the Northern Oregon Cascades including Willamette Pass:
- Mostly clear tonight,
- Sunny and warmer Tuesday (Summer Solstice), then clear Tuesday night,
- Mostly sunny and a bit cooler Wednesday, partly cloudy at night,
- Mostly sunny and a bit cooler Thursday afternoon, then clear Thursday night.
- free air freezing level 12,000 ft. tonight, 12,000 ft. rising to 13,000 ft. Tuesday afternoon, 14,000 ft. Tuesday night through Wednesday night, then 13,000 ft. Thursday and Thursday night.
- lows 36-45 cooling to 42 Thursday night highs 72-69 warming to 74 Thursday.
- Mostly sunny and a bit warmer Friday and Saturday, clear both nights,
- Mostly sunny Sunday, mostly clear Sunday night,
- Then mostly sunny and a bit cooler Monday.
- free air freezing level 13,000 ft. rising to 14,000 ft. Friday afternoon, 14,000 ft. Friday night and Saturday, then 15,000 ft. Saturday night through Monday.
- highs 74-82 cooling to 75 Monday lows 45-55.
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Just a slight chance of showers tonight.
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