That persistent Upper Level High Pressure Ridge (“Arch” shape) is continues sending cold air from the north over the Pacific Northwest keeping us colder than normal for the Pacific Northwest. The graphics for days 1-3 show no frontal systems in or approaching the Pacific Northwest until a cold front approaches from the northwest Thursday. The graphics for days 3-7 Sunday through Thursday show a stationary front that plants itself just inland of the West Coast. A frontal system will be to our West-North West over the ocean next Thursday.
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ADVISORIES:
- A COLD WEATHER ADVISORY IS IN EFFECT UNTIL 10 AM TODAY FOR THE NORTH OREGON COAST RANGE LOWLANDS, THE CENTRAL OREGON COAST RANGE LOWLANDS, THE NORTH OREGON COAST RANGE, THE CENTRAL OREGON COAST RANGE, THE LOWER COLUMBIA RIVER, THE OUTER SOUTHEAST PORTLAND METRO, THE WEST CENTRAL WILLAMETTE VALLEY, THE BENTON COUNTY LOWLANDS, THE LINN COUNTY LOWLANDS, THE LANE COUNTY LOWLANDS, THE CLACKAMAS COUNTY CASCADE FOOTHILLS, THE CASCADE FOOTHILLS OF MARION AND LINN COUNTIES, AND THE LANE COUNTY CASCADE FOOTHILLS.
- AN AIR STAGNATION ADVISORY IS IN EFFECT UNTIL NOON FRIDAY FOR THE SOUTH CENTRAL OREGON COAST.
- AN AIR STAGNATION ADVISORY IS IN EFFECT UNTIL NOON FRIDAY FOR CENTRAL DOUGLAS COUNTY, THE EASTERN DOUGLAS COUNTY FOOTHILLS, THE KLAMATH BASIN, NORTHERN AND EASTERN KLAMATH COUNTY, AND WESTERN, CENTRAL, AND EASTERN LAKE COUNTY.
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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:
- AM sun with widespread frost, a mix of clouds and sun and a bit cooler this afternoon, mostly cloudy with widespread frost and patchy fog late tonight,
- Patchy AM frost and patchy fog, mostly sunny Friday afternoon, mostly clear with widespread frost late at night,
- Sunny with widespread frost Saturday, then clear Saturday night.
- highs near 43 lows 29-23. .
- Sunny Sunday, clear Sunday night,
- Sunny and a bit warmer Monday, mostly clear at night,
- Mostly sunny and a bit warmer Tuesday, mostly clear in the evening, partly cloudy Tuesday night,
- Then mostly sunny and a bit warmer with a (30%) chance of rain Wednesday.
- highs 43-47 lows 26-28. (seasonal averages high 49 low 35)
HOME WOOD HEATING ADVISORY:
The Eugene & Springfield: YELLOW -Fireplace and wood stove used is cautioned. Protect air quality by not heating with wood when possible.
Oakridge And Westfir: YELLOW – Fireplace and wood stove used is cautioned. 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
- Partly cloudy with patchy AM dense fog, mostly cloudy and a bit cooler this afternoon, mostly cloudy with patchy fog tonight,
- Patchy AM fog, partly cloudy and a bit cooler Friday afternoon, mostly clear at night,
- Sunny and a bit cooler Saturday, then clear Saturday night.
- highs 47-45 lows 32-26.
- Sunny and a bit warmer Sunday, clear Sunday night,
- Sunny and a bit warmer Monday and Tuesday, clear both nights,
- Then partly cloudy and a bit warmer with a slight (20%) chance of showers Wednesday.
- highs 46-52 lows 29-33 (seasonal averages high 51 low 37)
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Forecast for The South Oregon Coast Including Coos Bay and North Bend:
- Partly cloudy with widespread AM frost and patchy dense fog, mostly cloudy and a bit cooler this afternoon, mostly cloudy with patchy coastal frost late tonight with inland areas of frost late tonight,
- AM sun with patchy coastal AM frost while areas of inland AM frost, partly cloudy and a bit cooler Friday afternoon, mostly clear at night,
- Mostly sunny and a bit cooler Saturday, then clear Saturday night.
- highs 55-50 warming to 52 Saturday lows 33-29.
- Sunny and a bit warmer Sunday and Monday, clear both nights,
- Sunny and a bit cooler Tuesday, mostly clear in the evening, partly cloudy late Tuesday night,
- Some AM clouds, then mostly cloudy and a bit warmer with a slight (20%) chance of showers Wednesday.
- highs 50-58 cooling to 53 Tuesday lows 28-34. (seasonal averages high 54 low 41)
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Forecast for the Northern Oregon Cascades including the Cascades in Lane County:
- Sunny start, a mix of clouds and sun and a bit cooler this afternoon, mostly cloudy tonight,
- Mostly sunny and cooler with a slight (20%) chance of snow showers Friday, mostly clear with a slight (20%) chance of evening snow showers, just mostly clear late at night,
- Sunny and a bit cooler Saturday, then clear Saturday night.
- free air freezing level 11,000 ft. today, 10,000 ft. falling to 7,000 ft. late tonight, snow level 2,500 ft. Friday, free air freezing level at the surface late Friday night, then at the surface Saturday and Saturday night.
- highs 47-27 low 23-14.
- Sunny and a bit warmer Sunday, clear Sunday night,
- Sunny and warmer Monday, clear at night,
- Sunny and a bit warmer Tuesday, mostly clear Tuesday night,
- Mostly cloudy with a (30%) chance of rain and a slight (20%) chance of snow Wednesday.
- free air freezing level at the surface Sunday, 7,500 ft. Sunday night, 10,000 ft. Monday, 9,000 ft. Monday night, 11,000 ft. Tuesday and Tuesday night, then snow level 4,500 ft. Wednesday.
- highs 33-46 lows 21-27.