Jan
20.
An Upper Level High Pressure Ridge (“Arch” shape) is sending an even colder airflow from the north over the Pacific Northwest keeping us dry with fog and colder than normal for the Pacific Northwest. The graphics for days 1-3 show no frontal systems in or approaching the Pacific Northwest. The graphics for days 3-7 Thursday through Monday show a cold front pushing through Thursday night and early Friday, then a stationary front plants itself just inland of the West Coast.
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Air Quality Index:
Eugene/Springfield: The Air Quality Index is 37 in the Good category measuring Particulate Matter.
Oakridge: The Air Quality Index is 26 in the Good category measuring Particulate Matter.
Cottage Grove: The Air Quality Index is 54 in the Moderate category measuring Particulate Matter.
Data courtesy of Lane Regional Air Protection Agency (LRAPA.org)
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ADVISORIES:
- AN AIR STAGNATION ADVISORY IS IN EFFECT UNTIL 10 AM TUESDAY FOR EASTERN CURRY COUNTY AND JOSEPHINE COUNTY, AND JACKSON COUNTY.
- AN AIR STAGNATION ADVISORY IS IN EFFECT UNTIL 10 AM TUESDAY FOR THE SOUTH CENTRAL OREGON COAST, 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.
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Forecast for the Southern and lower Mid Willamette Valley including Eugene-Springfield and Albany-Corvallis:
- Mostly cloudy with widespread frost late tonight,
- Widespread AM frost, mostly sunny and a bit warmer Tuesday afternoon, mostly clear with widespread frost Tuesday night,
- Widespread AM frost, mostly sunny and a bit cooler Wednesday afternoon, partly cloudy with widespread frost late at night,
- Widespread AM frost, mostly sunny and a bit warmer Thursday, then mostly cloudy Thursday night.
- lows 26-32 highs 47- 43 warming to 44 Thursday. .
- A mix of clouds and sun and a bit cooler with a good (50%) chance of rain Friday, partly cloudy with a slight (20%) chance of evening rain, mostly clear with a slight (20%) chance of rain late Friday night,
- Sunny and a bit cooler Saturday, clear at night,
- Sunny and a bit warmer Sunday, mostly clear Sunday night,
- Then sunny and a bit warmer Monday.
- highs 42-38 warming back to 42 Monday lows 26-25. (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: 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 this evening, mostly cloudy late tonight,
- Some AM clouds, sunny and a bit cooler Tuesday afternoon, cloudy patchy freezing fog late Tuesday night,
- Patchy AM freezing fog, sunny and a bit cooler Wednesday afternoon, mostly clear with patchy fog and freezing fog at night,
- AM sun with patchy fog and freezing fog and a bit warmer Thursday, then mostly cloudy with a slight (20%) chance of rain late Thursday night.
- lows 32-29 warming to 34 Thursday night highs 50-47 warming back to 50 Thursday.
- Mostly cloudy with a slight (20%) chance of AM rain, partly cloudy and a bit cooler with a slight (20%) chance of rain Friday afternoon, partly cloudy with a slight (20%) chance of evening rain and snow, mostly clear late Friday night,
- Sunny and Saturday and Sunday, clear both nights,
- Then sunny and a bit warmer Monday.
- 44-48 lows 30-26 warming to 28 Sunday night. (seasonal averages high 51 low 37)
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Forecast for The South Oregon Coast Including Coos Bay and North Bend:
- Partly cloudy this evening, mostly cloudy tonight,
- Sunny and a bit cooler Tuesday, mostly clear with widespread coastal frost and patchy freezing fog late Tuesday night while mostly clear with widespread inland frost late Tuesday night,
- Widespread AM coastal frost and patchy freezing fog while widespread AM inland frost, mostly sunny and a bit warmer Wednesday afternoon, mostly clear with areas of evening frost and widespread coastal frost late at night while areas of inland frost at night,
- AM sun with areas of frost, partly cloudy Thursday afternoon, then mostly cloudy Thursday night.
- lows 32-35 highs 55-56.
- Partly cloudy with a (20%) chance of AM rain, mostly cloudy and a bit cooler with a (30%) chance of rain Friday afternoon, mostly cloudy with a (%) chance of evening rain and snow, mostly clear with a slight (20%) chance of rain and snow late Friday night,
- Mostly sunny and a bit cooler Saturday, clear at night,
- Then sunny and a bit warmer Sunday and Monday, clear Sunday night.
- highs 52-50 warming to 54 Monday lows 32-30. (seasonal averages high 54 low 41)
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Forecast for the Northern Oregon Cascades including the Cascades in Lane County:
- Partly cloudy tonight,
- Sunny and warmer Tuesday, mostly clear Tuesday night,
- Sunny and a bit warmer Wednesday, mostly clear at night,
- Sunny and a bit warmer Thursday, partly cloudy with a slight (20%) chance of evening rain and snow, then mostly cloudy with a slight (20%) chance of rain and snow Thursday night.
- free air freezing level 9,000 ft. falling to 8,000 ft. late tonight, 7,000 ft. falling to 6,500 ft. Tuesday afternoon, 7,000 ft. rising to 7,500 ft. late Tuesday night, 8,000 ft. rising to 10,000 ft. Wednesday, 11,000 ft. Wednesday night and Thursday, then snow level 4,500 ft. Thursday night.
- low 22-29 cooling to 23 Thursday night highs 39-48.
- A mix of clouds and sun and cooler with a good (50%) chance of snow Friday, mostly cloudy with a good (50%) chance of evening snow, partly cloudy with a good (50%) chance of snow late Friday night,
- Mostly sunny and a bit cooler with slight (20%) chance of snow Saturday, clear at night,
- Then sunny and a bit warmer Sunday and Monday, mostly clear Sunday night,
- snow level 2,500 ft. Friday, at the surface Friday night and Saturday, free air freezing level at the surface Saturday night and Sunday, 4,000 ft. Sunday night, then 6,500 ft. Saturday.
- highs 32-25 cooling to 39 Monday lows 15-13 warming t0 18 Monday.