A Blocking Upper Level High Pressure Ridge (“Arch” shape) continues to control the weather over the Pacific Northwest keeping us colder than normal. The graphics for days 1-3 show no frontal systems approaching the West Coast. The graphics for days 3-7 Friday through Tuesday show that frontal systems that will be heading our way through the period.
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Air Quality Index
Eugene/Springfield: The Air Quality Index is 63 in the Moderate category measuring Particulate Matter.
Oakridge: The Air Quality Index is 51 in the Moderate category measuring Particulate Matter.
Cottage Grove: The Air Quality Index is 65 in the Moderate category measuring Particulate Matter.
Data courtesy of Lane Regional Air Protection Agency (LRAPA.org)
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ADVISORIES:
- A WINTER WEATHER ADVISORY IS IN EFFECT FROM 4 AM FRIDAY UNTIL 10 PM SATURDAY FOR THE SOUTH CENTRAL OREGON CASCADES, THE SISKIYOU MOUNTAINS, AND THE SOUTHERN OREGON CASCADES.
- A COLD WEATHER ADVISORY IS IN EFFECT FROM 10 PM TONIGHT UNTIL 10 WEDNESDAY FOR THE TUALATIN VALLEY, THE WEST CENTRAL WILLAMETTE VALLEY, THE EAST CENTRAL WILLAMETTE VALLEY, THE BENTON COUNTY LOWLANDS, THE LINN COUNTY LOWLANDS, AND THE LANE COUNTY LOWLANDS.
- A FREEZE WARNING IS IN EFFECT FROM 2 AM UNTIL 9 AM WEDNESDAY FOR THE SOUTH CENTRAL OREGON COAST.
- AN AIR STAGNATION ADVISORY IS IN EFFECT UNTIL NOON THURSDAY FOR SOUTH CENTRAL OREGON COAST.
- AN AIR STAGNATION ADVISORY IS IN EFFECT UNTIL 4 AM FRIDAY FOR THE EASTERN COLUMBIA RIVER GORGE OF OREGON, AND THE LOWER COLUMBIA BASIN OF OREGON, THE FOOTHILLS OF THE NORTHERN BLUE MOUNTAINS OF OREGON, THE FOOTHILLS OF THE SOUTHERN BLUE MOUNTAINS OF OREGON, NORTH CENTRAL OREGON, AND CENTRAL OREGON.
- AN AIR STAGNATION ADVISORY IS IN EFFECT UNTIL NOON THURSDAY FOR THE CURRY COUNTY COAST, CENTRAL DOUGLAS COUNTY, EASTERN CURRY COUNTY AND JOSEPHINE COUNTY, JACKSON COUNTY, THE KLAMATH BASIN, NORTHERN AND EASTERN KLAMATH COUNTY, AND WESTERN, CENTRAL AND EASTERN LAKE COUNTY.
- AN AIR STAGNATION ADVISORY IS IN EFFECT UNTIL 9 AM MST FRIDAY FOR HARNEY COUNTY, BAKER COUNTY, MALHEUR COUNTY, AND THE OREGON LOWER TREASURE VALLEY.
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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.
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Forecast for the Southern and lower Mid Willamette Valley including Eugene-Springfield and Albany-Corvallis:
- Mostly clear with widespread frost tonight and patchy fog late tonight,
- Widespread AM frost with patchy fog, sunny and slightly warmer Wednesday afternoon, mostly clear with areas of evening frost, partly cloudy with patchy fog and widespread frost late at night,
- A mix of clouds and sun with widespread AM frost with patchy dense fog, mostly cloudy and a bit cooler with a good (50%) chance of rain Thursday afternoon, a good (50%) chance of evening rain, mostly cloudy with rain late Thursday night,
- Mostly cloudy and a bit warmer with rain Friday, then rain with a slight (20%) chance of thunderstorms Friday night.
- lows 22-42 cooling to 40 Friday night highs 49-47 warming to 52 Thursday.
- Mostly cloudy and a bit cooler with rain Saturday, rain Saturday night,
- Mostly cloudy and a bit cooler with rain and a slight (20%) chance of snow Sunday, rain likely (70%) with a slight (20%) chance of snow at night (in the higher hills, no snow accumulation expected),
- Mostly cloudy and a bit cooler with rain likely (70%) and a slight (20%) chance of snow Monday, rain likely (70%) with a slight (20%) chance of snow Monday night (in the higher hills, no snow accumulation expected) ,
- Then rain likely (70%) and a slight (20%) chance of snow (in the higher hills, no snow accumulation expected) Tuesday.
- highs 45-42 lows near 33. (seasonal averages high 49 low 35)
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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: RED – Fireplace and wood stove used is prohibited unless it is your only source of heating.
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
- Clear with areas of evening frost, clear late tonight,
- Sunny and a bit cooler Wednesday, clear in the evening, partly cloudy late Wednesday night,
- Some AM clouds, mostly cloudy and a bit cooler with a slight (20%) chance of rain Thursday afternoon, cloudy with a good (50%) chance of evening rain, rain late Thursday night,
- Mostly cloudy and a bit warmer with rain and snow showers Friday, then showers Friday night.
- lows 30-43 highs 53-50 warming back to 53 Friday.
- Mostly cloudy with rain and a bit cooler Saturday, showers likely (70%) Saturday night,
- Mostly cloudy AM rain and snow showers likely (70%)(snow possibly heavy at times), rain and snow showers and a bit cooler Sunday afternoon, a good (50%) chance of rain and snow showers at night,
- Mostly cloudy with a good (50%) chance of AM rain and snow showers, rain and snow showers likely (70%) Monday afternoon, a good (50%) chance of evening rain and snow showers, rain and snow showers likely (70%) Monday night,
- Then mostly cloudy with rain and snow showers likely (70%) Tuesday.
- highs 46-44 lows 37-35 (seasonal averages high 51 low 37)
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Forecast for The South Oregon Coast Including Coos Bay and North Bend:
- Clear with patchy evening coastal frost and areas of late evening coastal frost becoming widespread coastal frost and patchy fog and freezing fog late tonight while inland areas of late evening frost and patchy fog with widespread inland frost late tonight,
- Areas of AM coastal frost while widespread inland AM frost, sunny Wednesday afternoon, partly cloudy with patchy evening frost, patchy coastal fog late at night while areas of inland fog with widespread frost late Wednesday night,
- Mostly cloudy with areas of AM coastal frost and patchy fog while inland AM widespread frost, mostly cloudy and slightly cooler with showers likely (70%) chance of rain Thursday afternoon, then rain and breezy at night (Coastal Wind: S 15-25 mph decreasing to S 10-15 mph late Thursday night),
- Mostly cloudy with showers and breezy and a bit warmer Friday, showers and breezy Friday night.
- lows 32-46 highs 55-50.
- Mostly cloudy with rain and a bit cooler Saturday, showers Saturday night,
- Mostly cloudy and a bit cooler with showers Sunday, showers at night,
- Mostly cloudy with showers and a bit cooler Monday, showers likely (70%) Monday night,
- Then mostly cloudy and slightly warmer with showers likely (70%) Tuesday.
- highs 53-48 lows 44-38 (seasonal averages high 54 low 41)
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Forecast for the Northern Oregon Cascades including the Cascades in Lane County:
- Clear tonight,
- Sunny and a bit warmer Wednesday, clear Wednesday night,
- Mostly sunny and a bit cooler with a (30%) chance of rain Thursday afternoon, evening snow with a slight (20%) chance of rain, mostly cloudy with rain and snow late Thursday night (snow possibly heavy at times),
- Mostly cloudy and cooler with rain Friday, rain and snow with a slight (20%) chance of thunderstorms Friday night (snow possibly heavy at times),
- free air freezing level 11,000 ft. falling to 10,000 ft. late tonight, 10,000 ft. Wednesday and Wednesday night, snow level 5,000 ft. Thursday, 4,500 ft. Thursday night, then 5,500 ft Friday.
- low 27-33 cooling to 28 Friday night highs 47-36.
- Mostly cloudy and a bit cooler with snow and rain Saturday and Saturday night,
- Mostly cloudy with snow and a slight (20%) chance of rain Sunday, snow likely (70%) with a slight (20%) chance of rain at night,
- Mostly cloudy and a bit warmer with snow and a slight (20%) chance of rain Monday, snow likely (70%) with a slight (20%) chance of rain Monday night,
- Then mostly cloudy with snow and a slight (20%) chance of rain Tuesday.
- snow level 5,500 ft. Friday, 5,000 ft. Friday night, 3,500 ft. Saturday, 2,500 ft. Saturday night, then 3,000 ft. Sunday through Tuesday.
- highs 47-32 warming to 34 Monday lows 29-25.