Mar
12.
Here is my new weekly weather quiz question. “What is a “Psychrometer?”
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An Upper Level Low Pressure Trough (“U” shape) has kept the Pacific Northwest in wet weather, but an Upper Level High Pressure Ridge (“Arch” shape) will take over with warmer and dry weather. The graphics for days 1-3 show the next frontal system that is approaching the coast. The graphics for days 3-7 Friday through Tuesday show the frontal activity through the period.
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Air Quality Index:
Eugene/Springfield: The Air Quality Index is 10 in the Good category measuring Particulate Matter.
Oakridge: The Air Quality Index is 4 in the Good category measuring Particulate Matter.
Cottage Grove: The Air Quality Index is 3 in the Good category measuring Particulate Matter.
Data courtesy of Lane Regional Air Protection Agency (LRAPA)
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ADVISORIES:
- A WINTER WEATHER ADVISORY IS IN EFFECT UNTIL 8 PM TONIGHT ABOVE 2,500 FT. FOR THE NORTH OREGON CASCADES, THE CASCADES IN MARION AND LINN COUNTIES, AND THE CASCADES IN LANE COUNTY.
- A WINTER WEATHER ADVISORY IS IN EFFECT UNTIL 11 PM TONIGHT ABOVE 4,000 FT. FOR THE EAST SLOPES OF THE OREGON CASCADES.
- A WINTER STORM WARNING IS IN EFFECT UNTIL 5 PM TODAY FOR THE SOUTH CENTRAL OREGON CASCADES, THE SISKIYOU MOUNTAINS, AND THE SOUTHERN OREGON CASCADES.
- A WINTER WEATHER ADVISORY IS IN EFFECT UNTIL 5 PM TODAY FOR THE SOUTH CENTRAL OREGON CASCADES, THE SISKIYOU MOUNTAINS, AND THE SOUTHERN OREGON CASCADES.
- A WIND ADVISORY IS IN EFFECT UNTIL 5 PM TODAY FOR CENTRAL AND EASTERN LAKE COUNTY.
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 a (40%) chance of evening showers, a slight (20%) chance of showers late tonight (under 0.10 in. of rain possible),
- Clouds and sun with a slight (20%) chance of AM showers, a mix of clouds and sun and a bit warmer Wednesday afternoon, mostly clear with areas of frost late Wednesday night,
- Widespread frost, mostly sunny and warmer Thursday afternoon, mostly clear at night,
- Mostly sunny and warmer Friday, then clear Friday night.
- lows 37-32 warming back to 37 Friday night highs 52-72.
- Mostly sunny and a bit warmer Saturday, clear Saturday night,
- Mostly sunny and a bit cooler Sunday afternoon, mostly clear at night,
- Some AM clouds, sunny Monday afternoon, mostly clear Monday night,
- Partly cloudy and a bit cooler Tuesday.
- highs 73-66 lows 40-44. (seasonal averages high 56 low 37)
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EUGENE-SPRINGFIELD POLLEN COUNT:
GRASS: ABSENT (0)
TREES: MODERATE (39)
WEEDS: ABSENT (0)
Measured 3.12.24
Data courtesy of Oregon Allergy Associates.
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Home Wood Heating Advisory:
Eugene-Springfield: GREEN- Burning wood in wood stoves or fireplaces is allowed.
Oakridge: GREEN- Burning wood in wood stoves or fireplaces is allowed.
*Pellet stoves can be used anytime since they don’t produce the particulate smoke.
Data courtesy of Lane Regional Air Protection Agency (LRAPA)
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Forecast for the Umpqua Valley including Roseburg:
- Mostly cloudy with a slight (20%) chance of rain tonight (under 0.10 in. of rain possible),
- Mostly cloudy with a slight (20%) chance of AM rain, becoming partly cloudy and a bit warmer Wednesday afternoon, mostly clear Wednesday night,
- Sunny and a bit warmer Thursday, clear at night,
- Sunny and warmer Friday, then clear Friday night.
- lows 38-35 warming to 40 Friday night highs 53-70.
- Sunny Saturday and Sunday, clear both nights,
- Mostly sunny and a bit warmer Monday, mostly clear Monday night,
- Then sunny and a bit cooler Tuesday.
- highs 70-72 cooling to 68 Tuesday lows 43-46. (seasonal average high 58 low 39)
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Forecast for The South Oregon Coast Including Coos Bay and North Bend:
- Mostly cloudy with a slight (20%) chance of rain tonight (under 0.10 in. of rain possible),
- Mostly cloudy with a slight (20%) chance of AM rain, mostly cloudy and a bit warmer Wednesday afternoon, mostly clear Wednesday night,
- Sunny and a bit warmer Thursday, mostly clear Thursday night,
- Mostly sunny and a bit warmer Friday, then clear Friday night.
- lows 38-44 highs 54-69.
- Sunny and a bit cooler Saturday and Sunday, clear both nights,
- Mostly sunny Monday, mostly clear Monday night,
- Then sunny and a bit cooler Tuesday.
- highs 66-59 lows 43-45. (seasonal average high 55 low 42)
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Forecast for the Northern Oregon Cascades including the Cascades in Lane County:
- Mostly cloudy with a good (50%) chance of evening showers with snow showers likely (70%), a (30%) chance of rain showers and snow showers late tonight (0.25 in. of rain possible, 1-4 in. of snow possible),
- Clouds and sun with a slight (20%) chance of AM snow showers, a mix of clouds and sun and a bit warmer Wednesday afternoon, mostly clear Wednesday night,
- Mostly sunny and warmer Thursday, mostly clear at night,
- Sunny and a bit warmer Friday, then clear Friday night.
- snow level 2,000 ft. tonight and Wednesday, free air freezing level 4,000 ft. falling to 3,500 ft. late Wednesday night, 5,000 ft. rising to 9,000 ft. Thursday afternoon, 10,000 ft. falling to 9,000 ft. late Thursday night, then 11,000 ft. Friday and Friday night,
- lows 23-20 warming to 28 Friday night highs 35-52.
- Mostly sunny and a bit warmer Saturday, mostly clear Saturday night,
- Mostly sunny Sunday, clear at night,
- Mostly sunny Monday, mostly clear Monday night,
- Then partly cloudy and a bit cooler with a slight (20%) chance of rain Tuesday.
- free air freezing level 10,000 ft. Saturday through Monday night, then snow level 7,000 ft. Tuesday.
- highs 56-54 lows 30-34.
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