Here is my new weekly weather quiz question. “What is “Relative Humidity?”
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An Upper Level Low Pressure Trough (“U” shape) is over the Pacific Northwest. The graphics for days 1-3 show a frontal system sliding through Pacific Northwest between tonight and Monday. The graphics for days 3-7 Wednesday through Sunday show the frontal activity moving across the Pacific Northwest through the period.
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Air Quality Index:
Eugene/Springfield: The Air Quality Index is 33 in the Good category measuring Particulate Matter.
Oakridge: The Air Quality Index is 6 in the Good category measuring Particulate Matter.
Cottage Grove: The Air Quality Index is 5 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 11 PM MONDAY ABOVE 4,000 FT. FOR THE NORTHERN OREGON CASCADES, THE CASCADES OF MARION AND LINN COUNTIES, AND THE CASCADES OF LANE COUNTY.
- A WINTER WEATHER ADVISORY IS IN EFFECT UNTIL 2 AM MONDAY ABOVE 3,500 FT. FOR THE SOUTHERN BLUE MOUNTAINS OF OREGON.
- A WINTER WEATHER ADVISORY IS IN EFFECT UNTIL 11 PM TONIGHT ABOVE 4,000 FT. THE OCHOCO AND THE JOHN DAY HIGHLANDS.
- A WIND ADVISORY IS IN EFFECT UNTIL 11 PM TONIGHT FOR THE EASTERN COLUMBIA GORGE OF OREGON, THE LOWER COLUMBIA BASIN OF OREGON, THE FOOTHILLS OF THE SOUTHERN BLUE MOUNTAINS OF OREGON, AND NORTH CENTRAL OREGON.
- A WIND ADVISORY IS IN EFFECT FROM 11 AM UNTIL 8 PM MONDAY 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 good (50%) of evening rain, rain late tonight (0.25 in. of rain possible),
- Mostly cloudy with AM rain and a slight (20%) chance of thunderstorms, a bit warmer with showers and a slight (20%) chance of thunderstorms Monday afternoon (0.25 in. of rain possible, more in storms), evening showers with a slight (20%) chance of thunderstorms, a good (50%) chance of rain late Monday night (0.10 in. of rain possible, more in storms),
- Mostly cloudy with a good (50%) chance of AM showers, partly cloudy and a bit warmer with a good (50%) chance of showers Tuesday afternoon, partly cloudy at night,
- Mostly sunny and a bit warmer Wednesday, then mostly clear Wednesday night.
- lows 45-37 warming to 42 Wednesday night highs 56-65.
- Sunny and warmer Thursday, clear Thursday night,
- Sunny and a bit warmer Friday and Saturday, clear both nights.
- Then sunny and a bit cooler Sunday.
- highs 77-84 cooling to 80 Sunday lows 47-52 (seasonal averages high 66 low 43)
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EUGENE-SPRINGFIELD POLLEN COUNT:
GRASS: ABSENT (0)
TREES: LOW (8)
WEEDS: ABSENT (0)
Measured 5.5.24
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 (30%) chance of rain tonight (under 0.10 in. of rain possible),
- Mostly cloudy with showers and a slight (20%) chance of thunderstorms Monday (under 0.10 in. of rain possible, snow level 3,500 ft.), evening showers with a slight (20%) chance of thunderstorms, a good (50%) chance of rain late Monday night (under 0.10 in. of rain possible, snow level 3,000 ft.),
- Mostly cloudy and a bit warmer with a (30%) chance of rain Tuesday (snow level 3,000 ft.), partly cloudy in the evening, mostly clear with areas of frost late Tuesday night,
- AM clouds with areas of frost, sunny and warmer Wednesday afternoon, clear Wednesday night.
- lows 45-40 warming to 42 Wednesday night highs 56-66.
- Sunny and warmer Thursday, clear Thursday night,
- Sunny and a bit warmer Friday, clear at night,
- Sunny and a bit warmer Saturday, mostly clear Saturday night,
- Then mostly sunny and a bit cooler Sunday.
- highs 79-83 lows 49-55. (seasonal average high 69 low 46)
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Forecast for The South Oregon Coast Including Coos Bay and North Bend:
- Mostly cloudy with a good (50%) chance of late evening coastal rain continuing tonight and coastal rain likely (70%) late tonight while a (30%) chance of late evening inland rain continuing overnight tonight (0.10 in. of rain possible),
- Mostly cloudy with a good (50%) chance of AM coastal rain and a slight (20%) chance of thunderstorms and coastal showers with a slight (20%) chance of thunderstorms and a bit warmer Monday afternoon while inland AM rain with a slight (20%) chance of thunderstorms and inland afternoon rain likely (70%) with a slight (20%) chance of thunderstorms and a bit warmer Monday afternoon (0.10 in. of rain possible), evening showers likely (70%) with a slight (20%) chance of thunderstorms, a good (50%) chance of rain late Monday night (under 0.10 in. of rain possible),
- Mostly cloudy and a bit warmer Tuesday with a slight (20%) chance of inland AM rain, becoming mostly clear Tuesday night,
- Sunny and a bit warmer Wednesday, then clear Wednesday night.
- lows 45-40 warming to 44 Wednesday night highs 55-62.
- Sunny and as bit warmer Thursday and Friday, clear both nights,
- Mostly sunny and a bit cooler Saturday, mostly clear Saturday night,
- Some AM clouds, then sunny and a bit cooler Sunday afternoon.
- highs 72-77 cooling to 66 Sunday lows 52-50. (seasonal average high 59 low 47)
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Forecast for the Northern Oregon Cascades including the Cascades in Lane County:
- Mostly cloudy and a bit warmer with rain likely (70%) and snow tonight (0.50 in. of rain possible, 2-5 in. of snow possible),
- Mostly cloudy with AM rain and snow, rain showers, snow showers and a slight (20%) thunderstorms and a bit warmer Monday afternoon and evening (0.75 in. of rain possible, 4-8 in. of snow possible, snow possibly heavy at times), snow snow showers late Monday night (0.50 in. of rain possible, 2-5 in of snow possible),
- Mostly cloudy and a bit cooler with rain showers likely (70%) and and snow showers Tuesday, a slight (20%) chance of evening rain and snow showers just partly cloudy late at night,
- Sunny and a bit warmer Wednesday, then mostly clear Wednesday night.
- snow level 4,000 ft. tonight, 4,500 ft. Monday, 3,000 ft. Monday night, 3,000 ft. rising to 4,000 ft. Tuesday afternoon, 3,500 ft. Tuesday night, free air freezing level 5,500 ft. Wednesday, then 8,000 ft. Wednesday night.
- lows 30-24 warming to 32 Wednesday night highs 38-47.
- Sunny and warmer Thursday, clear Thursday night,
- Sunny and a bit warmer Friday clear at night,
- Sunny and a bit warmer Saturday, mostly clear Saturday night,
- Then mostly sunny with a slight (20%) chance of rain Sunday.
- free air freezing level 10,000 ft. Thursday, 12,000 ft. Thursday night, 11,000 ft. Friday through Saturday night, then snow level above 8,000 ft. Sunday.
- highs 66-69 lows 38-45.
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