Here is my weekly weather quiz question for the last time. “What are “Sastrugi?” Here is the correct answer. Sastrugi are ridges of snow formed on a snow field by the action of the wind.
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An Upper Level High Pressure Ridge (“Arch” shape) strengthens again bringing more sunshine. The graphics for days 1-3 show no frontal systems moving through Oregon, but a weak front will be offshore Sunday. The graphics for days 3-7 Tuesday through Saturday show a frontal system will be moving through Oregon next Tuesday and another will be offshore next Friday, then pushing into the Pacific Northwest next Saturday.
ADVISORIES:
- NONE AT THIS TIME.
HEALTH ADVISORIES:
- 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.
Forecast for the Southern and lower Mid Willamette Valley including Eugene-Springfield and Albany-Corvallis:
- A mix of clouds and sun today, partly cloudy this evening, clear late tonight,
- A mix of clouds and sun Sunday, mostly clear at night,
- Sunny Monday, then clear Monday night.
- highs near 82 lows 54-50.
- Sunny Tuesday, clear Tuesday night.
- Sunny and a bit warmer Wednesday and Thursday (Independence Day), clear both nights,
- Then sunny and a bit warmer Friday.
- highs 82-94 lows 50-54. (seasonal averages high 79 low 50)
Forecast for the Umpqua Valley including Roseburg:
- Partly cloudy today, partly cloudy with patchy fog tonight,
- AM clouds, sunny and a bit warmer Sunday afternoon, mostly clear at night,
- Some AM clouds, sunny Monday, then clear Monday night.
- highs near 85 lows 59-55.
- Sunny Tuesday, clear Tuesday night,
- Sunny and a bit warmer Wednesday, clear Wednesday night,
- Sunny and a bit warmer Thursday (Independence Day), clear Thursday night,
- Then sunny and a bit warmer Friday.
- highs 85-98 lows 55-60. (seasonal average high 81 low 55)
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Forecast for The South Oregon Coast Including Coos Bay and North Bend:
- Patchy AM and late night fog, mostly cloudy start, partly cloudy and a bit warmer this afternoon and evening, mostly cloudy late tonight,
- AM clouds with areas of fog, sunny Sunday afternoon, mostly clear in the evening, partly cloudy late at night,
- Some AM clouds, sunny and a bit cooler Monday, then mostly clear Monday night.
- highs 72-70 lows 54-50.
- Mostly sunny Tuesday, mostly clear Tuesday night,
- Mostly sunny and a bit warmer Wednesday, mostly clear at night,
- Sunny and a bit warmer Thursday (Independence Day), mostly clear Thursday night,
- Then mostly sunny and a bit warmer Friday.
- highs 70-75 lows 49-52. (seasonal average high 65 low 53)
Forecast for the Northern Oregon Cascades including the Cascades in Lane County:
- Mostly sunny and a bit cooler today, partly cloudy tonight,
- Mostly sunny Sunday, mostly clear at night,
- Sunny and a bit warmer Monday, then clear Monday night.
- free air freezing level 12,000 ft. today through Monday, then 15,000 ft. Monday night.
- highs 66-68 lows 44-42.
- Sunny and a bit warmer Tuesday and Wednesday, clear both nights,
- Sunny and a bit warmer Thursday (Independence Day), clear Thursday night,
- Then sunny and a bit warmer Friday.
- free air freezing level 15,000 ft. Tuesday and Tuesday night, 16,000 ft. Wednesday and Wednesday night, then above 16,000 ft. Thursday through Friday.
- highs 72-85 lows 42-46.