Mar
21.
Here is my weekly weather quiz question. “What is the “QPf Discussion?”
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An Upper Level High Pressure Ridge (“Arch” shape) starts migrating away from us. The graphics for days 1-3 show the frontal systems that is on the way to the Pacific Northwest Friday. The graphics for days 3-7 Sunday through Thursday show the frontal system that pushes through the Pacific Northwest Wednesday and next Thursday.
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Air Quality Index:
Eugene/Springfield: The Air Quality Index is 11 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 7 in the Good category measuring Particulate Matter.
Data courtesy of Lane Regional Air Protection Agency (LRAPA)
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ADVISORIES:
- NONE AT THIS TIME.
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 patchy fog and a slight (20%) chance of rain late tonight,
- Mostly cloudy with patchy AM fog and a good (50%) chance of rain, showers and a bit cooler with a slight (20%) chance of thunderstorms Friday afternoon (0.25 in. of rain possible, more in storms), evening showers likely (70%) with a slight (20%) chance of thunderstorms, a good (50%) chance of showers late Friday night (0.10 in. of rain possible),
- Mostly cloudy with showers and a slight (20%) chance of thunderstorms and a bit cooler Saturday (0.10 in. of rain possible), a slight (20%) chance of evening thunderstorms, showers likely (70%) at night (under 0.10 in. of rain possible),
- Mostly cloudy and a bit cooler with showers likely (70%) Sunday, then a good (50%) chance of showers Sunday night.
- lows 45-42 highs 60-56.
- Mostly cloudy with rain and a bit cooler Monday, rain likely (70%) Monday night,
- Mostly cloudy and a bit warmer with rain Tuesday, rain at night,
- Mostly cloudy with rain Wednesday and Wednesday night,
- Then mostly cloudy with rain likely (70%) Thursday.
- highs 52-55 lows 42-44 cooling to 40 Thursday. (seasonal averages high 57 low 38)
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EUGENE-SPRINGFIELD POLLEN COUNT:
GRASS: ABSENT (0)
TREES: HIGH (345)
WEEDS: ABSENT (0)
Measured 3.21.24
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 showers late tonight,
- Mostly cloudy with AM rain, showers and a bit cooler with a slight (20%) chance of thunderstorms Friday afternoon and evening (0.10 in. of rain possible), a good (50%) chance of showers late Friday night (under 0.10 in. of rain possible, snow level 3,500 ft.),
- Mostly cloudy with AM showers likely (70%), showers with a slight (20%) chance of thunderstorms and a bit cooler Saturday (0.10 in. of rain possible), evening showers with a slight (20%) chance of thunderstorms, a good (50%) chance of showers late at night (under 0.10 in. of rain possible),
- Mostly cloudy with showers likely (70%) Sunday, then a (30%) chance of showers Sunday night.
- lows 46-43 highs 58-55.
- Mostly cloudy with AM showers likely (70%), rain likely (70%) Monday night,
- Mostly cloudy with rain likely (70%) Tuesday, rain at night,
- Mostly cloudy with Wednesday and in the evening, rain and snow likely (70%) Wednesday night and Thursday AM, then rain likely (70%) Thursday afternoon.
- highs near 55 lows near 43. (seasonal average high 59 low 40)
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Forecast for The South Oregon Coast Including Coos Bay and North Bend:
- Mostly cloudy with slight (20%) chance of late evening showers, rain late tonight (under 0.10 in. of rain possible),
- Mostly cloudy with AM rain, coastal showers likely (70%) with a slight (20%) chance of thunderstorms Friday afternoon while inland showers and a bit cooler with a slight (20%) chance of thunderstorms Friday afternoon (0.50 in. of rain possible), evening coastal showers with a slight (20%) chance of thunderstorms and coastal showers with a slight (20%) chance of thunderstorms late at night while mostly cloudy with inland evening showers and a slight (20%) chance of thunderstorms and inland showers late Friday night (0.10 in. of rain possible),
- Mostly cloudy and a bit cooler with showers and a slight (20%) chance of thunderstorms Saturday (0.25 in. of rain possible), evening coastal showers likely (70%) while inland evening showers and a slight (20%) chance of thunderstorms, a good (50%) chance of showers late at night (under 0.10 in. of rain possible),
- Mostly cloudy with AM showers likely (70%), then a good (50%) chance of showers Sunday afternoon, a (30%) chance of showers Sunday night,
- lows 46-42 highs 58-55.
- Mostly cloudy with AM showers likely (70%), showers Monday afternoon, rain likely (70%) Monday night,
- Mostly cloudy with rain likely (70%) Tuesday, rain and breezy at night,
- Mostly cloudy with rain and breezy Wednesday, rain Wednesday night,
- Mostly cloudy with AM rain, then rain likely (70%) Thursday afternoon.
- highs near 55 lows 42-44 cooling back to 42 Wednesday night. (seasonal average high 55 low 42)
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Forecast for the Northern Oregon Cascades including the Cascades in Lane County:
- Mostly cloudy tonight,
- Mostly cloudy with a slight (20%) chance of AM rain, showers and a bit cooler with a slight (20%) chance of thunderstorms Friday afternoon (0.25 in. of rain possible, more in storms), evening showers and snow showers with a slight (20%) chance of thunderstorms, rain and snow showers likely (70%) late Friday night (0.50 in. of rain possible),
- Mostly cloudy with rain showers and snow showers a slight (20%) chance of thunderstorms and a bit cooler Saturday and in the evening, rain and snow showers likely (70%) late at night,
- Mostly cloudy with rain and snow showers Sunday, then a (50%) chance of rain and snow showers Sunday night.
- free air freezing level 7,500 ft. rising to 8,000 ft. late tonight, snow level 6,000 ft. Friday, 5,000 ft. falling to 4,000 ft. Friday night, 3,500 ft. Saturday through Sunday, then 4,000 ft. Sunday night.
- lows 35-28 highs 48-37.
- Mostly cloudy with snow and rain Monday, rain and snow Monday night,
- Mostly cloudy with rain and snow Tuesday and at night,
- Mostly cloudy and a bit cooler with rain and snow Wednesday (snow possibly heavy at times), snow and rain likely (70%) Wednesday night,
- Then mostly cloudy and a bit cooler with snow and rain Thursday.
- snow level 3,500 ft. Monday, 4,000 ft. Monday night, 3,500 ft. Tuesday, 4,000 ft.Wednesday, then 3,000 ft. Wednesday night and Thursday.
- highs 38-36 lows near 28.
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