Check out my latest Eugene Daily News Weather Or Not column:
http://eugenedailynews.com/2018/04/heres-a-new-one-have-you-ever-heard-of-a-dirty-thunderstorm/
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Here is my weekly weather quiz question. What is a “Downburst?” The first person to post the correct answer as a comment on this page will win a week of free personalized weather forecasts tailored to your needs. Good luck.
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An Upper Level Low Pressure Trough (Shaded “U” shape with arrows) moves slowly past Oregon and then an Upper Level High Pressure Ridge (Shaded “Arch” shape with arrows) displaces the low pressure bringing sunshine and dry weather through Friday. The graphics for days 3-7 show a weak frontal system pushing into the Pacific Northwest Saturday and overnight into Sunday AM.
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Air Quality Index:
Eugene/Springfield: The Air Quality Index is 31 in the Good category measuring Particulate Matter.
Oakridge: The Air Quality Index is 7 in the Good category measuring Particulate Matter.
Cottage Grove: The Air Quality Index is 31 in the Good category measuring Particulate Matter.
Data courtesy of Lane Regional Air Protection Agency (LRAPA)
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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:
- Partly cloudy tonight,
- Partly cloudy with patchy AM fog, sunny and warmer Wednesday afternoon, mostly clear Wednesday night,
- AM clouds, mostly sunny and a bit warmer Thursday, partly cloudy at night,
- A mix of clouds and sun and a bit cooler Friday, then partly cloudy in the evening mostly cloudy late Friday night.
- lows 40-46 highs 70-72 cooling to 69 Friday.
- Mostly cloudy and a bit warmer with a slight (20%) chance of showers Saturday and Saturday night,
- A mix of clouds and sun with a (30%) chance of showers Sunday, partly with a slight (20%) chance of showers at night,
- A mix of clouds and sun and a bit warmer Monday, then partly cloudy Monday night and Tuesday (a bit warmer).
- highs 70-73 lows 48-46. (seasonal averages high 64 low 41)
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Eugene-Springfield Pollen Count
Grass………. Low (2)
Trees………. High (98)
Last Counted: 4/28/18
Data Courtesy of Oregon Allergy Associates
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Forecast for Roseburg:
- Partly cloudy tonight and Wednesday AM, sunny and a bit warmer in the afternoon, clear Wednesday night,
- Sunny and a bit cooler Thursday, partly cloudy at night,
- Partly cloudy and a bit cooler Friday, then mostly cloudy Friday night.
- lows 42-50 highs 78-76.
- Mostly cloudy with a slight (20%) chance of AM showers, a bit cooler with a slight (20%) chance of thunderstorms Saturday afternoon and evening, a slight (20%) chance of showers late Saturday night,
- Partly cloudy and a bit cooler with a (30%) chance of showers Sunday, mostly cloudy with a slight (20%) chance of showers at night,
- Then partly cloudy and a bit warmer Monday through Tuesday.
- highs 75-73 warming to 70 Tuesday lows 48-50. (seasonal averages high 66 low 44)
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Forecast for The South Oregon Coast Including Coos Bay and North Bend:
- Partly cloudy tonight and Wednesday AM, sunny and warmer Wednesday afternoon, mostly clear in the evening, partly cloudy late at night with patchy coastal fog,
- Partly cloudy with patchy AM coastal fog, sunny and a bit cooler Thursday, partly cloudy in the evening, mostly cloudy late Thursday night,
- AM partly cloudy, becoming mostly cloudy and a bit cooler Friday afternoon and at night.
- lows 42-50 cooling to 48 Friday night highs 62-57 warming to 60 Friday.
- Mostly cloudy and a bit cooler Saturday, a slight (20%) chance of showers Saturday night and Sunday (a bit cooler), partly cloudy Sunday night,
- Partly cloudy and a bit warmer Monday and Tuesday, mostly clear Monday night.
- highs 60-64 near 48. (seasonal averages high 57 low 45)
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Forecast for the Cascades in Lane County:
- Partly cloudy tonight,
- Sunny and warmer Wednesday, clear Wednesday night,
- Mostly sunny and a bit warmer Thursday, partly cloudy at night,
- Then partly cloudy and a bit cooler Friday and Friday night.
- free air freezing level 7,000 ft. rising 8,000 ft. late tonight, 9,000 ft. rising to 10,000 ft. Wednesday afternoon, 10,000 ft. falling to 9,000 ft. late Wednesday night, 12,000 ft. Thursday and Thursday night, then 11,000 ft. Friday and Friday night.
- lows 37-40 highs 62-64 cooling to 62 Thursday.
- Mostly cloudy and a bit cooler with a good (50%) chance of showers Saturday, a (40%) chance of showers at night,
- Mostly cloudy and a bit cooler with a good (50%) chance of showers Sunday, partly cloudy with a (40%) chance of showers Sunday night,
- A mix of clouds and sun and a bit warmer with a slight (20%) chance of showers Monday, then partly cloudy Monday night and Tuesday.
- snow level above 8,000 ft. Saturday through Monday, then free air freezing level 14,000 ft. Monday night and Tuesday (a bit warmer).
- highs 60-58 warming to 64 Tuesday lows near 40.
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**Because weather forecasting is a combination of science, intuition, and timing there can be no absolute guarantees that individual forecasts will be 100% accurate. Nature is in a constant state of flux and sudden unexpected weather events can happen.
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Get your local Eugene-Springfield and Lane County news on-line at eugenedailynews.com.
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