Mar
02.
Here is my weekly weather quiz question for the last time. “What is a “Polar Front?” Here is the correct answer. A Polar Front is a semipermanent, semicontinuous front that separates tropical air masses from polar air masses.
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An Upper Level Low Pressure Trough (“U” shape) is sweeping more moisture and cool air over the the Pacific Northwest. The graphics for days 1-3 show no frontal systems over the Pacific Northwest. The graphics for days 3-7 Wednesday through Sunday show increasing frontal activity through the period.
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Air Quality Index:
Eugene/Springfield: The Air Quality Index is 25 in the Good category measuring Particulate Matter.
Oakridge: The Air Quality Index is 39 in the Good category measuring Particulate Matter.
Cottage Grove: The Air Quality Index is 15 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 4 AM TODAY ABOVE 1,000 FT. FOR THE COAST RANGE OF NORTHWEST OREGON AND THE CENTRAL COAST RANGE OF WESTERN OREGON.
- A WINTER WEATHER ADVISORY IS IN EFFECT UNTIL 4 PM TODAY ABOVE 1,500 FT. FOR THE NORTHERN OREGON CASCADE FOOTHILLS AND THE CASCADE FOOTHILLS IN LANE COUNTY.
- A WINTER STORM WATCH IS IN EFFECT FROM MONDAY MORNING THROUGH TUESDAY AFTERNOON ABOVE 4,500 FT. FOR THE KLAMATH BASIN.
- A WINTER WEATHER ADVISORY IS IN EFFECT UNTIL 10 PM TONIGHT FOR THE SOUTH CENTRAL OREGON CASCADES, THE SISKIYOU MOUNTAINS, AND THE SOUTHERN OREGON CASCADES.
- A WINTER STORM WATCH IS IN EFFECT FROM MONDAY MORNING THROUGH TUESDAY AFTERNOON ABOVE 4,500 FT. FOR THE SOUTH CENTRAL OREGON CASCADES, THE SISKIYOU MOUNTAINS, AND THE SOUTHERN OREGON CASCADES.
- A WINTER STORM WARNING IS IN EFFECT UNTIL 10 PM TONIGHT FOR EASTERN CURRY COUNTY AND JOSEPHINE COUNTY.
- A WINTER WEATHER ADVISORY IS IN EFFECT UNTIL 10 PM SUNDAY ABOVE 2,000 FT. FOR CENTRAL DOUGLAS COUNTY AND THE EASTERN DOUGLAS COUNTY FOOTHILLS.
- A WINTER STORM WARNING IS IN EFFECT UNTIL 10 PM TONIGHT ABOVE 2,000 FT. FOR JACKSON COUNY.
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 AM snow showers and a slight (20%) chance of thunderstorms, slightly warmer with showers and a slight (20%) chance of thunderstorms this afternoon (snow level 500 ft.), evening rain showers and a slight (20%) chance of snow showers with a slight (20%) chance of thunderstorms, rain showers and a slight (20%) chance of snow showers tonight (0.25 in. of rain possible, more in storms, snow level 1,000 ft.),
- Mostly cloudy with AM rain showers and a slight (20%) chance of snow showers and a slight (20%) chance of thunderstorms, showers and slightly cooler Monday afternoon (AM snow level 1,000 ft.), evening showers, a good (50%) chance of rain and snow showers at night (0.25 in. of rain possible, snow level 1,000 ft.),
- A mix of clouds and sun with a good (50%) chance of rain with snow showers Tuesday (0.25 in. of rain possible, snow level 1,000 ft.), then just partly cloudy Tuesday night.
- highs 46-45 lows 32-26.
- Partly cloudy and a bit warmer with a (40%) chance of snow showers Wednesday (snow level 500 ft.), partly cloudy with a slight (20%) chance of evening rain and snow showers, mostly cloudy with a slight (20%) chance of rain and snow showers late Wednesday night (snow level 1,000 ft),
- A mix of clouds and sun and a bit warmer with a (40%) chance of rain and snow showers Thursday (snow level 1,000 ft.), partly cloudy with a slight (20%) chance of showers at night,
- A mix of clouds and sun and a bit warmer with a slight (20%) chance of showers Friday, mostly cloudy with a good (50%) chance of showers Friday night,
- Then mostly cloudy with a good (50%) chance of showers Saturday.
- highs 46-55 lows 29-37. (seasonal averages high 55 low 36)
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EUGENE-SPRINGFIELD POLLEN COUNT:
GRASS: ABSENT (0)
TREES: LOW (3)
WEEDS: ABSENT (0)
Measured 3.2.24
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 rain showers, snow showers and a slight (20%) chance of thunderstorms and a bit cooler today (1 in. of snow possible lower elevations and 2-3 in. of snow possible above 1,500 ft., snow level 700 ft. rising to 1,500 ft. this afternoon), rain showers, snow showers with a slight (20%) chance of thunderstorms late tonight (1 in., of snow possible lower elevations and 2-3 in. of snow possible above 1,500 ft. ,snow level 1,000 ft. tonight),
- Mostly cloudy with rain showers, snow showers and a slight (20%) chance of thunderstorms Monday (snow possibly heavy at times, snow level 1,000 ft. rising to 2,500 ft. in the afternoon), evening rain and snow, rain and snow showers likely (70%) late at night (snow level 1,500 ft. falling to 1,000 ft. late at night),
- Mostly cloudy and a bit warmer with a good (50%) chance of rain and snow Tuesday, then partly cloudy with a slight (20%) chance of rain and snow Tuesday night.
- highs 44-46 lows 32-34 cooling to 28 Tuesday night.
- Mostly cloudy and a bit warmer with a slight (20%) chance of rain and snow Wednesday and Wednesday night,
- Mostly cloudy with a slight (20%) chance of AM rain and snow, a bit warmer with a slight (20%) chance of rain Thursday and at night,
- Partly cloudy and a bit warmer with a slight (20%) chance of rain Friday and Friday night,
- Then mostly cloudy with a (40%) chance of rain Saturday.
- highs 47-56 lows 30-37. (seasonal average high 57 low 39)
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Forecast for The South Oregon Coast Including Coos Bay and North Bend:
- Mostly cloudy with a good (50%) chance of coastal showers and a (40%) chance of thunderstorms today while inland showers and snow showers with a (30%) chance of thunderstorms today (0.25 in. of rain possible, 1 in. of snow possible, snow level 1,000 ft. rising to 1,500 ft. this afternoon), coastal showers with a slight (20%) chance of thunderstorms tonight while inland snow showers and a slight (20%) chance of thunderstorms tonight (0.25 in. of rain possible, little or no snow accumulation expected, snow level 1,500 ft.)
- Mostly cloudy with coastal showers and a slight (20%) chance of thunderstorms while inland AM showers and snow and a slight (20%) chance of thunderstorms Monday with inland showers and a slight (20%) chance of thunderstorms a bit warmer Monday afternoon (0.75 in. of rain possible, AM snow level 1,500 ft.), evening rain, a good (50%) chance of coastal rain late at night while inland rain and snow likely (70%) at night (.25 in. of rain possible),
- Mostly cloudy with a (40%) chance of AM rain and snow, a (30%) chance of rain and a bit warmer Tuesday afternoon, partly cloudy with a slight (20%) chance of rain and snow Tuesday night.
- highs 48-49 lows 35-32.
- Partly cloudy and a bit warmer with a slight (20%) chance of rain and snow Wednesday, a slight (20%) chance of rain and snow Wednesday night,
- Mostly cloudy with a slight (20%) chance of AM rain and snow, partly cloudy with a slight (20%) chance of rain and a bit warmer Thursday afternoon, partly cloudy with a slight (20%) chance of rain at night,
- Partly cloudy and a bit warmer with a slight (20%) chance of rain Friday, a (30%) chance of rain Friday night,
- Mostly cloudy with a good (50%) chance of AM rain, then rain likely (70%) Saturday afternoon.
- highs 50-57 lows 35-40. (seasonal average high 55 low 41)
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Forecast for the Northern Oregon Cascades including the Cascades in Lane County:
- Mostly cloudy with AM snow and rain showers, a bit warmer with snow showers and a slight (20%) chance of thunderstorms this afternoon (0.50 in. of rain possible, 2-4 in. of snow possible), snow showers with a slight (20%) chance of thunderstorms tonight (0.50 in. of rain possible, 2-5 in. of snow possible),
- Mostly cloudy and a bit warmer with snow showers Monday (snow possibly heavy at times), snow showers Monday night (snow possibly heavy at times),
- Mostly cloudy and a bit warmer with snow showers likely (70%) Tuesday, partly cloudy with a good (50%) chance of snow showers Tuesday night.
- snow level at the surface tonight, 1,500 ft. Sunday afternoon, at the surface Sunday night, 2,500 ft. Monday afternoon, 1,500 ft. Monday night, then at the surface Tuesday and Tuesday night.
- highs 27-30 lows 20 cooling to 13.
- Partly cloudy and a bit warmer with a (40%) chance of snow showers Wednesday, a slight (20%) chance of snow showers Wednesday night,
- A mix of clouds and sun and a bit warmer with a (40%) chance of snow showers and a bit cooler Thursday, partly cloudy with a slight (20%) chance of snow showers at night,
- Partly cloudy and a bit warmer with a slight (20%) chance of rain and snow showers Friday, a slight (20%) chance of rain and snow showers Friday night,
- Then mostly cloudy with a good (50%) chance of rain and snow showers Saturday.
- snow level at the surface Wednesday and Wednesday night, 1,500 ft, Thursday, 2,500 ft. Thursday night, 3,500 ft. Friday, then 4,500 ft. Friday night and Saturday.
- highs 33-42 cooling to 40 Saturday lows 17-25.
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