An Upper Level High Pressure Ridge (“Arch” shape) is building up toward the coast bringing a lengthy dry spell. The graphics for days 1-3 show no frontal systems pushing into the Willamette Valley. The graphics for days 3-7 Wednesday through Sunday show a complex frontal system will be moving through the Pacific Northwest Wednesday and next Thursday. Another front will push into Oregon next Sunday.
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ADVISORIES:
- A FROST ADVISORY IS IN EFFECT UNTIL 7 AM TODAY FOR THE NORTH OREGON COAST RANGE LOWLANDS, THE CENTRAL OREGON COAST RANGE LOWLANDS, OUTER SOUTHEAST PORTLAND METRO, THE LINN COUNTY LOWLANDS, THE LANE COUNTY LOWLANDS, THE UPPER HOOD RIVER VALLEY, THE CLACKAMAS COUNTY CASCADE FOOTHILLS, THE CASCADE FOOTHILLS OF MARION AND LINN COUNTY, THE CLACKAMAS COUNTY CASCADE FOOTHILLS, AND THE LANE COUNTY CASCADE FOOTHILLS.
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.
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Forecast for the Southern and lower Mid Willamette Valley including Eugene-Springfield and Albany-Corvallis:
- Sunny and a bit warmer today for Cinco de Mayo, clear tonight,
- Sunny and a bit warmer Tuesday, mostly clear at night,
- Mostly sunny and cooler Wednesday, partly cloudy Wednesday night.
- highs 73-80 cooling to 72 Wednesday lows 43-46 cooking to 44 Wednesday night.
- Mostly sunny and a bit cooler Thursday, clear Thursday night,
- Sunny and a bit warmer Friday, partly cloudy at night,
- Mostly sunny and a bit cooler Saturday, partly cloudy Saturday night,
- Then mostly sunny and a bit cooler with a (30%) chance of showers Sunday.
- highs 69-75 cooling to 72 Sunday lows 42-46. (seasonal averages high 66 low 43).
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HOME WOOD HEATING ADVISORY:
The Eugene & Springfield: GREEN– Fireplace and wood stove used is allowed. Protect air quality by not heating with wood when possible.
Oakridge And Westfir: GREEN– Fireplace and wood stove used is allowed. Protect air quality by not heating with wood when possible.
The use of pellet stoves is always allowed.
Data courtesy of Lane Regional Air Protection Agency (LRAPA.org)
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Forecast for the Umpqua Valley including Roseburg:
- Sunny and warmer today for Cinco de Mayo, mostly clear tonight,
- Sunny and a bit warmer Tuesday, mostly clear at night,
- Sunny and a bit cooler Wednesday, then partly cloudy Wednesday night.
- highs 76-84 cooling back to 76 Wednesday lows 46-49 cooling to 48 Wednesday night.
- Partly cloudy and and a bit cooler Thursday, mostly clear Thursday night,
- Mostly sunny and a bit warmer Friday, partly cloudy at night,
- Partly cloudy and a bit cooler Saturday, partly cloudy Saturday night,
- Then partly cloudy with a slight (20%) chance of rain and a bit cooler Sunday afternoon.
- highs 74-80 cooling to 76 Sunday lows 48-47. (seasonal averages high 69 low 46).
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Forecast for The South Oregon Coast Including Coos Bay and North Bend:
- AM sun, partly cloudy and a bit warmer this afternoon for Cinco de Mayo, mostly clear tonight,
- Sunny Tuesday, mostly clear in the evening, partly cloudy with patchy fog late at night,
- Mostly cloudy with patchy AM fog, partly cloudy and a bit cooler Wednesday afternoon, mostly cloudy in the evening, then partly cloudy Wednesday night.
- highs 65-70 cooling to 62 Wednesday lows 44-46 cooling to 42 Wednesday night.
- Mostly sunny Thursday, mostly clear Thursday night,
- Mostly sunny and a bit warmer Friday, partly cloudy at night,
- Partly cloudy Saturday and Saturday night,
- Mostly cloudy with a slight (20%) chance of AM rain, then partly cloudy and a bit cooler with a slight (20%) chance of rain Sunday afternoon.
- highs 62-64 cooling back to 62 Sunday lows 42-45.
- (seasonal averages high 59 low 47). _______________
Forecast for the Northern Oregon Cascades including the Cascades in Lane County:
- Sunny and warmer today , clear tonight,
- Sunny and a bit warmer Tuesday, mostly clear at night,
- Mostly sunny and a bit cooler Wednesday, then partly cloudy with a slight (20%) chance of showers Wednesday night.
- free air freezing level 10,000 ft. rising to 11,000 ft. this afternoon, 11,000 ft. rising to 12,000 ft. late tonight, 12,000 ft. Tuesday and Tuesday night, 11,000 ft. Wednesday, then snow level 7,000 ft. Wednesday night.
- highs 60-68 cooling to 65 Wednesday lows 36-40 cooling to 38 Wednesday night.
- Sunny and a bit cooler Thursday, clear Thursday night,
- Sunny and a bit warmer Friday, partly cloudy in the evening, mostly clear late at night,
- Mostly sunny and a bit cooler Saturday, partly cloudy with with a slight (20%) chance of showers Saturday night,
- Then mostly sunny and a bit cooler with a (40%) chance of showers Sunday.
- free air freezing level 11,000 ft. Thursday and Thursday night, 12,000 ft. Friday, 13,000 ft. Friday night, 12,000 ft. Saturday, snow level above 8,000 ft. Saturday night, then 7,500 ft. Sunday.
- highs 63-72 cooling to 60 Friday warming to 68 Friday cooling to 66 Saturday lows 42-40.