Mar
03.
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 Thursday through Monday show increasing frontal activity through the period.
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Air Quality Index:
Eugene/Springfield: The Air Quality Index is 14 in the Good category measuring Particulate Matter.
Oakridge: The Air Quality Index is 23 in the Good category measuring Particulate Matter.
Cottage Grove: The Air Quality Index is 11 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 THROUGH THIS MORNING ABOVE 500 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 CASCADE FOOTHILLS IN LANE COUNTY.
- A WINTER STORM WATCH IS IN EFFECT FROM THIS AFTERNOON THROUGH LATE MONDAY NIGHT ABOVE 1,500 FT. FOR THE CASCADE FOOTHILLS IN LANE COUNTY.
- A WINTER STORM WATCH IS IN EFFECT FROM THIS MORNING THROUGH TUESDAY AFTERNOON ABOVE 4,500 FT. FOR THE KLAMATH BASIN.
- A WINTER STORM WARNING IS IN EFFECT FROM 10 AM TODAY UNTIL 4 PM TUESDAY ABOVE 4,500 FT. FOR THE KLAMATH BASIN.
- A WINTER STORM WARNING IS IN EFFECT FROM 10 AM TODAY UNTIL 4 PM TUESDAY FOR THE SOUTH CENTRAL OREGON CASCADES,
- A WINTER WEATHER ADVISORY IS IN EFFECT UNTIL 10 AM TODAY FOR THE SOUTH CENTRAL OREGON CASCADES.
- A WINTER WINTER STORM WARNING IS IN EFFECT FROM 10 AM TODAY UNTIL 4 PM TUESDAY FOR THE SOUTH CENTRAL OREGON CASCADES.
- A WINTER STORM WARNING IS IN EFFECT FROM 10 AM TODAY UNTIL 4 PM TUESDAY FOR THE CENTRAL OREGON CASCADES.
- A WINTER WEATHER ADVISORY IS IN EFFECT UNTIL 10 AM TODAY FOR THE CENTRAL OREGON CASCADES.
- A WINTER STORM WARNING IS IN EFFECT FROM 10 AM TODAY UNTIL 4 PM TUESDAY FOR THE KLAMATH BASIN, NORTHERN AND EASTERN KLAMATH COUNTY, AND WESTERN, CENTRAL, AND EASTERN LAKE COUNTY.
- A WINTER WEATHER ADVISORY IS IN EFFECT FROM 10 AM TODAY UNTIL 4 PM TUESDAY FOR THE KLAMATH BASIN, NORTHERN AND EASTERN KLAMATH COUNTY, AND WESTERN, CENTRAL, AND EASTERN LAKE COUNTY.
- A WINTER STORM WARNING IS IN EFFECT FROM 10 AM TODAY UNTIL 4 PM TUESDAY ABOVE 3,500 FT. FOR THE SOUTH CENTRAL OREGON CASCADES AND THE SISKIYOU MOUNTAINS.
- A WINTER WEATHER ADVISORY IS IN EFFECT UNTIL 10 AM TODAY ABOVE 1,500 FT. FOR CENTRAL DOUGLAS COUNTY AND THE EASTERN DOUGLAS COUNTY FOOTHILLS.
- *A WINTER STORM WARNING IS IN EFFECT FROM 10 AM TODAY UNTIL 4 PM TUESDAY ABOVE 1,800 FT. FOR CENTRAL DOUGLAS COUNTY AND THE EASTERN DOUGLAS COUNTY FOOTHILLS.
- *A WINTER WEATHER ADVISORY IS IN EFFECT IN IN EFFECT UNTIL 1 AM TODAY ABOVE 500 FT. FOR THE COAST RANGE OF NORTHWEST OREGON AND THE CENTRAL COAST RANGE OF WESTERN OREGON,
- A WINTER WEATHER ADVISORY IS IN EFFECT FROM 4 PM TODAY UNTIL 4 AM TUESDAY FOR THE OCHOCO AND AND THE JOHN DAY HIGHLANDS.
- A WINTER WEATHER ADVISORY IS IN EFFECT FROM 4 PM TODAY UNTIL 4 AM TUESDAY FOR CENTRAL OREGON.
- A WINTER WEATHER ADVISORY IS IN EFFECT UNTIL 4 AM TUESDAY FOR THE EAST SLOPES OF THE OREGON CASCADES,
- A WINTER STORM WATCH IS IN EFFECT FROM THIS AFTERNOON THROUGH TUESDAY EVENING FOR HARNEY COUNTY AND MALHEUR COUNTY.
- A WINTER STORM WARNING IS IN EFFECT UNTIL 4 PM TUESDAY ABOVE 3,500 FT. FOR EASTERN CURRY COUNTY AND JOSEPHINE COUNTY.
- A WINTER WEATHER ADVISORY IS IN EFFECT UNTIL 10 AM TODAY ABOVE 3,500 FT. FOR EASTERN CURRY COUNTY AND JOSEPHINE COUNTY.
- A WINTER STORM WARNING IS IN EFFECT FROM 10 AM TODAY UNTIL 4 PM TUESDAY ABOVE 3,000 FT. FOR JACKSON COUNTY.
- A WINTER WEATHER ADVISORY IS IN IS IN EFFECT UNTIL 10 AM TODAY ABOVE 1,500 FT. FOR JACKSON 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 AM snow showers, rain showers and a slight (20%) chance of thunderstorms and slightly warmer this afternoon (0.25 in. of rain possible, 1 in. of snow possible, snow level 1,000 ft.), evening showers likely (70%), a good (50%) chance of showers and a slight (20%) chance of snow showers late tonight (0.25 in. of rain possible, snow level 500 ft.),
- Partly cloudy with a slight (20%) chance of AM showers, partly cloudy and a bit warmer Tuesday afternoon (0.25 in. of rain possible, snow level 500 ft.), then just partly cloudy at night,
- Partly cloudy and a bit warmer Wednesday and in the evening, (snow level 500 ft.), mostly cloudy late Wednesday night.
- highs 44-46 lows 32-29.
- A mix of clouds and sun and a bit warmer Thursday, partly cloudy Thursday night,
- Mostly cloudy and a bit warmer Friday, mostly cloudy with a good (50%) chance of showers at night,
- Mostly cloudy and a bit cooler with rain likely (70%) Saturday, rain likely (70%) Saturday night,
- Then mostly cloudy with rain likely (70%) Sunday.
- highs 49-55 cooling to 52 Saturday and Sunday lows 32-39. (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 a good (50%) chance of AM rain showers, snow showers and a slight (20%) chance of thunderstorms, rain showers and snow showers with a slight (20%) chance of thunderstorms and a bit warmer this afternoon (3-4 in. of snow possible, snow level 700 ft. rising to 2,00 ft. this afternoon), evening rain and snow, rain showers and and snow showers likely (70%) and a slight (20%) chance of thunderstorms late tonight (3-6 in. of snow possible, snow level 1,500 ft. falling to 1,000 ft. late tonight),
- Mostly cloudy with a (30%) chance of rain and snow Tuesday (snow level 700 ft. rising to 1,500 ft. in the afternoon), a good (50%) chance of rain and snow at night (evening snow level 800 ft.) ,
- Partly cloudy and a bit warmer Wednesday, then partly cloudy Wednesday night.
- highs 44-46 lows 35-28.
- Partly cloudy and a bit warmer Thursday, partly cloudy Thursday night,
- Partly cloudy and a bit warmer with a slight (20%) chance of rain Friday afternoon, mostly cloudy with a good (50%) chance of evening rain, rain likely (70%) late at night,
- Mostly cloudy and a bit cooler with rain likely (70%) Saturday and in the evening, a good (50%) chance of rain and snow late Saturday night,
- Mostly cloudy with AM rain and snow likely (70%), then rain and a bit warmer Sunday afternoon.
- highs 48-55 cooling to 50 Saturday warming to 52 Sunday lows 32-39. (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 AM coastal showers with a slight (20%) chance of thunderstorms while inland AM showers and snow showers with a slight (20%) chance of thunderstorms, showers with a slight (20%) chance of thunderstorms this afternoon (0.25 in. of rain possible, AM snow level 1,500 ft. rising to 2,000 ft. this afternoon), evening showers, a good (50%) chance of coastal rain late tonight while inland rain and snow likely (70%) late at night (0.50 in. of rain possible),
- Mostly cloudy with a slight (20%) chance of coastal rain while a slight (20%) chance of inland AM rain and snow and partly cloudy with a slight (20%) chance of inland rain and a bit warmer Tuesday afternoon (0.10 in. of rain possible, snow level 800 ft. rising to 2,000 ft. in the afternoon), a slight (20%) chance of evening coastal rain while a slight (20%) chance of inland rain and snow at night,
- Partly cloudy and a bit warmer Wednesday, then partly cloudy Wednesday night.
- highs 48-50 lows 35-32 warming to 34 Wednesday night.
- Partly cloudy with a slight (20%) chance of rain and a bit warmer Thursday, partly cloudy in the evening, mostly cloudy late Thursday night,
- Mostly cloudy and a bit warmer with a slight (20%) chance of rain Friday afternoon, a good (50%) chance of rain at night,
- Mostly cloudy with AM rain likely (70%), rain and a bit cooler Saturday afternoon, rain likely (70%) Saturday night,
- Mostly cloudy with AM rain likely (70%), then rain and a bit cooler Sunday 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 and a bit warmer with snow showers today (2-5 in. of snow possible), snow showers tonight (4-7 in. of snow possible, evening snow possibly heavy at times),
- Partly cloudy and a bit warmer with a slight (20%) chance of snow showers Tuesday, partly cloudy at night,
- Some AM clouds, mostly sunny and a bit warmer Wednesday afternoon, then just partly cloudy Wednesday night.
- snow level 2,000 ft. this afternoon, at the surface tonight and Tuesday, 1,500 ft. Tuesday and Wednesday, then free air freezing level at the surface Wednesday night.
- highs 27-34 lows 19-16.
- Partly cloudy and a bit warmer with a slight (20%) chance of snow showers and a bit warmer Thursday, partly cloudy with a slight (20%) chance of snow showers Thursday 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 rain and snow showers at night,
- Mostly cloudy and a bit cooler with snow and rain likely (70%) Saturday, snow likely (70%) with a slight (20%) chance of rain Saturday night,
- Then mostly cloudy with snow and rain likely (70%) Sunday.
- snow level 2,000 ft, Thursday, free air freezing level 4,500 ft. Thursday night, 7,500 ft. Friday, snow level 5,000 ft. Friday night, 4,000 ft. Saturday, then 3,000 ft. Saturday night and Sunday.
- highs 36-43 cooling to 37 Saturday and Sunday lows 20-26.
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