Check out my latest Eugene Daily News Weather Or Not column:
http://eugenedailynews.com/2018/03/they-are-unwelcome-visitors-but-can-we-make-them-go-away/
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Here is my weekly weather quiz question for the last time. What are “Detention Basins?” Here is the correct answer.Detention Basins are structures built upstream from populated areas to prevent runoff and/or debris flows from causing property damage and loss of life. They are normally dry, but are designed to attenuate storm flows or detain mud/debris during and immediately after a runoff event. They have no spillway gates or valves and do not store water on a long-term basis. Typical detention times for storm flows are on the order of 24 to 72 hours, but may be as long as 5 to 10 days. Basins designed for detention of mud and rock debris are periodically excavated to maintain their storage capacity. I’ll have a new weekly weather quiz question for you starting Monday. 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 High Pressure Ridge (Shaded “Arch” shape with arrows) takes over for a while. The graphics for days 1-3 show weak frontal systems that will bring more clouds and a chance of showers for Easter Sunday. The graphics for days 3-7 show the frontal systems that will move through the Pacific Northwest Tuesday through next Saturday.
Note: Willamette Pass Ski is closed for the season due to a lack of snow, but Hoodoo is open Thursday through Sunday from 9 AM- 4 PM or 9 PM. Mt. Ashland is open and reports all lifts are operating. They are open 9 AM until 4 pm through April 1st for Spring break. Check their websites for details on days of operation and ski conditions.
Happy Easter and a solemn Passover.
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Air Quality Index:
Eugene/Springfield: The Air Quality Index is 26 in the Good category measuring Particulate Matter.
Oakridge: The Air Quality Index is 15 in the Good category measuring Particulate Matter.
Cottage Grove: The Air Quality Index is 16 in the Good category measuring Particulate Matter.
Data courtesy of Lane Regional Air Protection Agency (LRAPA)
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Home Wood Heating Advisory:
(Posted Daily)
Eugene-Springfield: GREEN – Burning is Allowed.
Oakridge: GREEN – Burning is Allowed.
*Note: Pellet stoves may be used anytime if they produce no visible emissions.
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,
- Mostly cloudy with a good (50%) chance of showers (under 0.10 in. of rain possible) and a bit cooler Sunday afternoon (Easter), evening rain likely (70%), a good (50%) chance of rain Sunday night (0.10 in. of rain possible),
- A mix of clouds and sun with a slight (20%) chance of showers and a bit cooler Monday, just partly cloudy at night,
- Mostly cloudy and a bit warmer Tuesday, then cloudy and a bit warmer with a (30%) chance of rain Tuesday night.
- lows 37-32 warming to 40 Tuesday night highs 54-50 warming to 56 Tuesday.
- Cloudy and a bit warmer with a good (50%) chance of rain Wednesday, mostly cloudy with rain likely (70%) Wednesday night and Thursday, mostly cloudy with rain Thursday night,
- Mostly cloudy with rain likely (70%) Friday and Friday night,
- Then rain likely (70%) and a bit cooler Saturday.
- highs near 58 lows 42-46. (seasonal averages high 59 low 38)
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Forecast for Roseburg:
- Mostly clear tonight,
- Mostly cloudy and a bit cooler with a slight (20%) chance of rain Sunday (Easter) afternoon, a good (50%) chance of rain at night (under 0.10 in. of rain possible, snow level 3,000 ft.),
- Mostly cloudy with a slight (20%) chance of rain and snow showers Monday AM, partly cloudy and a bit cooler in the afternoon, mostly clear Monday night,
- Partly cloudy in the AM, mostly cloudy and a bit warmer Tuesday afternoon, then mostly cloudy with a (30%) chance of rain Tuesday night.
- lows 40-33 warming to 39 Tuesday night highs 59-62.
- Mostly cloudy and a bit warmer with a (30%) chance of rain Wednesday and Wednesday night,
- Mostly cloudy and a bit cooler with rain Thursday and Thursday night,
- Then rain likely (70%) and a bit warmer, rain likely (70%) at night,
- Rain likely (70%) and a bit warmer Friday, rain likely (70%) and a bit cooler Friday night,
- Then mostly cloudy with rain likely (70%) and a bit cooler Saturday.
- highs 66-60 lows 47-50 cooling back to 47 Friday night. (seasonal averages high 60 low 40)
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Forecast for The South Oregon Coast Including Coos Bay and North Bend:
- Mostly clear this evening, partly cloudy late tonight,
- Mostly cloudy and a bit cooler Sunday (Easter) with a slight (20%) chance of rain in the afternoon (under 0.10 in. of rain possible), evening coastal rain likely (70%) with a good (50%) chance of coastal rain late at night while a (40%) chance of inland rain Sunday night (under 0.10 in. of rain possible),
- Mostly cloudy with a slight (20%) chance of AM inland showers, just partly cloudy and a bit warmer Monday afternoon, mostly clear Monday night,
- Partly cloudy in the AM, mostly cloudy and a bit warmer Tuesday afternoon, then mostly cloudy with a (40%) chance of rain Tuesday night.
- lows 39-36 warming to 42 Tuesday night highs 53-55.
- Mostly cloudy and a bit warmer with a (40%) chance of rain Wednesday and at night,
- Mostly cloudy with rain Thursday and Thursday night,
- Mostly cloudy with rain and a bit cooler Friday and Friday night,
- Then mostly cloudy and a bit cooler with rain likely (70%) Saturday.
- highs 59-56 lows near 48. (seasonal averages high 54 low 42)
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Forecast for the Cascades in Lane County:
- Partly cloudy tonight,
- A mix of clouds and sun and a bit cooler with a good (50%) chance of rain and snow Sunday afternoon (0.10 in. of rain possible), evening rain and snow, rain and snow showers likely (70%) at night,
- A mix of clouds and sun Monday with a (40%) chance of rain and snow showers Monday AM (1 in. of snow possible), just partly cloudy Monday night,
- A mix of clouds and sun and a bit warmer Tuesday, then mostly cloudy with a (30%) chance of rain and snow Tuesday night.
- free air freezing level 6,500 ft. tonight, snow level 4,000 ft. Sunday, 5,000 ft. falling to 4,000 ft. Sunday night, free air freezing level at the surface 4,000 ft. Monday afternoon, 4,000 ft. Monday night, 4,500 ft. rising to 7,000 ft. Tuesday afternoon, then snow level 4,500 ft. Tuesday night.
- lows 29-22 warming to 33 Tuesday night highs 46-35 warming to 49 Tuesday.
- Cloudy and a bit cooler with a good (50%) chance of rain and snow Wednesday, mostly cloudy with a good (50%) chance of rain at night,
- Mostly cloudy and a bit cooler with rain likely (70%) Thursday, rain Thursday night,
- Then mostly cloudy with rain likely (70%) and a bit warmer Friday through Saturday.
- snow level 6,000 ft. Wednesday, 6,500 ft. Wednesday night, 7,500 ft. Thursday, above 8,000 ft. Thursday night and Friday, 8,000 ft. Friday night, then 6,500 ft. Saturday.
- highs 50-47 warming back to 50 Friday cooling to 46 Saturday lows 36-38 cooling back to 36 Friday night.
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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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