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 Low Pressure Trough (Shaded “U” shape with arrows) takes over returning the chances for precipitation. The graphics for days 1-3 show weak frontal systems that brought more clouds and a chance of showers for your Easter Sunday and early in the week. The graphics for days 3-7 show the frontal systems that will move through the Pacific Northwest Tuesday through next Sunday.
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Air Quality Index:
Eugene/Springfield: The Air Quality Index is 19 in the Good category measuring Particulate Matter.
Oakridge: The Air Quality Index is 9 in the Hood category measuring Particulate Matter.
Cottage Grove: The Air Quality Index is 8 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 FROST ADVISORY IS IN EFFECT FROM 1 AM UNTIL 9 AM TUESDAY FOR THE SOUTH CENTRAL OREGON COAST.
- A WIND ADVISORY IS IN EFFECT FROM 5 PM TODAY UNTIL 8 AM MONDAY FOR NORTHERN AND EASTERN KLAMATH COUNTY, AND WESTERN, CENTRAL, AND EASTERN LAKE COUNTY.
- 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 evening rain likely (70%), partly cloudy with a slight (20%) chance of showers late tonight (0.10 in. of rain possible),
- A mix of clouds and sun with a slight (20%) chance of showers and a bit cooler Monday afternoon (under 0.10 in. of rain possible), partly cloudy with patchy fog at night,
- Patchy AM fog, a mix of clouds and sun and a bit warmer Tuesday afternoon, cloudy with a slight (20%) chance of evening rain, a (40%) chance of rain Tuesday night,
- Cloudy and a bit warmer with a (40%) chance of rain Wednesday, a good (50%) chance of rain at night.
- lows 35-30 warming to 45 Wednesday night highs 49-59.
- Mostly cloudy and a bit cooler with rain likely (70%) Thursday, rain Thursday night,
- Showers likely (70%) Friday and a bit warmer, rain likely (70%) at night,
- Mostly cloudy with rain and a bit cooler Saturday, showers Saturday night,
- Then cloudy with a good (50%) chance of showers Sunday.
- highs 59-54 lows 49-42. (seasonal averages high 59 low 38)
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Forecast for Roseburg:
- Mostly cloudy with evening rain likely (70%), a good (50%) chance of rain late tonight (under 0.10 in. of rain possible, snow level 2,500 ft. late tonight),
- Mostly cloudy with a slight (20%) chance of rain and snow showers Monday AM, just partly cloudy and a bit cooler in the afternoon, mostly clear with areas of frost late Monday night,
- Areas of AM frost, mostly cloudy and a bit warmer Tuesday afternoon, mostly cloudy with a slight (20%) chance of rain Tuesday night,
- Then mostly cloudy and a bit warmer with a (30%) chance of rain Wednesday, cloudy with a (%) chance of evening rain, rain likely (70%) late Wednesday night.
- lows 36-33 warming to 39 Tuesday night highs 59-62.
- Mostly cloudy and a bit cooler with rain Thursday and Thursday night,
- Showers and a bit warmer Friday, rain likely (70%) and a bit cooler Friday night,
- Mostly cloudy with rain and a bit cooler Saturday, showers likely (70%) and cooler at night,
- Then mostly cloudy with showers likely (70%) Sunday.
- 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 cloudy with evening rain likely (70%) with a good (50%) chance of rain late tonight (under 0.10 in. of rain possible),
- Mostly cloudy with a slight (20%) chance of AM coastal showers while a slight (20%) chance of AM inland rain and snow showers, just partly cloudy and a bit warmer Monday afternoon, mostly clear in the evening, partly cloudy with areas of frost late Monday night,
- Areas of AM frost, mostly cloudy and a bit warmer Tuesday afternoon, cloudy with a slight (20%) chance of rain Tuesday night,
- Cloudy and a bit warmer with a (40%) chance of rain Wednesday, then rain at night.
- lows 38-35 warming to 47 Wednesday night highs 53-59.
- Mostly cloudy with rain and a bit cooler Thursday and Thursday night,
- Mostly cloudy with showers and a bit warmer Friday, rain and a bit cooler Friday night and Saturday, then showers likely (70%) Saturday night and Sunday (a bit warmer).
- highs near 56 lows 50-43. (seasonal averages high 54 low 42)
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Forecast for the Cascades in Lane County:
- Mostly cloudy with evening rain and snow, rain and snow showers likely (70%) and colder late night (2-5 in. of snow possible),
- A mix of clouds and sun and a bit cooler Monday with a good (50%) chance of rain and snow showers in the AM (1 in. of snow possible), just mostly clear and cold Monday night,
- A mix of clouds and sun and warmer Tuesday, becoming cloudy with with a slight (20%) chance of evening rain and snow, a (40%) chance of rain and snow late Tuesday night,
- Then cloudy and a bit warmer with a good (50%) chance of rain and snow Wednesday (1 in. of snow possible), then cloudy with a good (50%) chance of rain at night.
- snow level 5,500 ft. falling to 3,500 ft. tonight, free air freezing level at the surface Monday, 4,000 ft. falling to the surface late Monday night, 4,500 ft. rising to 7,000 ft. Tuesday afternoon, snow level 4,500 ft. Tuesday night, 5,000 ft. Wednesday, then 7,000 ft. Wednesday night.
- lows 22-36 highs 34-52.
- Mostly cloudy and a bit cooler with rain likely (70%) Thursday, rain Thursday night,
- Mostly cloudy with showers likely (70%) and a bit warmer Friday, rain likely (70%) at night,
- Rain likely (70%) and a bit cooler Saturday, rain and snow showers Saturday night,
- Then mostly cloudy with rain and snow showers likely (70%) and a bit cooler Sunday.
- snow level 7,500 ft. Thursday, above 8,000 ft. Thursday night through Friday night, 7,000 ft. Saturday, 4,500 ft. Saturday night, then 4,000 ft. Sunday.
- highs 47-50 Friday cooling to 42 Sunday lows 38-30.
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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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