Check out my latest Eugene Daily News Weather Or Not column:
http://eugenedailynews.com/2018/10/the-last-time-this-year-i-hope/
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Here is my weekly weather quiz question for the last time. What is a “Growing Degree Day?” Here is the correct answer. A Growing Degree Day is the number of degrees that the average temperature is above a baseline value. For example, 40 degrees for canning purposes; 45 degree for potatoes; and 50 degrees for sweet corn, snap beans, lima beans, tomatoes, grapes, and field corn. Every degree that the average temperature is above the baseline value becomes a growing degree day. Agricultural related interests use growing degree days to determine planting times. 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) is controlling our Fall weather pattern. The graphics for days 1-3 show the next frontal system heading our way for Monday. The graphics for days 3-7 show the frontal system past us by Tuesday.
Note: Due to the continued fire danger, the outdoor burning season has been delayed until October 13th. The next update on the burning season will be issued at 7 pm October 12th. Remember, burning is always prohibited within the city of Eugene.
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Air Quality Index:
Eugene/Springfield: The Air Quality Index is 23 in the Good category measuring Particulate Matter.
Oakridge: The Air Quality Index is 6 in the Good category measuring Particulate Matter.
Cottage Grove: The Air Quality Index is 4 in the Good category measuring Particulate Matter.
Data courtesy of Lane Regional Air Protection Agency (LRAPA)
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ADVISORIES:
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:
- Partly cloudy and cooler with areas of fog late tonight and Sunday AM, a mix of clouds and sun in the afternoon, becoming mostly cloudy with a slight (20%) chance of rain late Sunday night (under 0.10 in. of rain possible),
- Mostly cloudy with a good (50%) chance of AM rain, a bit warmer with a slight (20%) chance of rain Monday afternoon (Columbus day), mostly cloudy with a good (50%) chance of rain at night,
- A mix of clouds and sun with a slight (20%) chance of showers Tuesday, then partly cloudy with a slight (20%) chance of showers Tuesday night.
- lows 42-50 cooling back to 42 Tuesday night highs 63-65 cooling back to 63 Tuesday.
- Partly cloudy and a bit warmer Wednesday, partly cloudy with patchy fog at night and Thursday AM, mostly sunny and a bit warmer in the afternoon, mostly clear with areas of fog Thursday night,
- Areas of AM fog, mostly sunny and a bit warmer Friday, mostly clear at night,
- Then mostly sunny and a bit warmer Saturday.
- highs 65-70 lows 42-40 warming back to 42 Friday night. (seasonal averages high 69 low 43)
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Your College Football Forecast
Saturday October 13th:
Ducks vs Washington at Autzen Stadium – Kickoff: Time to be announced – Too soon for a preliminary weather forecast.
The Beavers have a bye week.
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Forecast for Roseburg:
- Partly cloudy with a slight (20%) chance of isolated evening showers, just partly cloudy late tonight,
- AM clouds, partly cloudy and a bit warmer Sunday afternoon, becoming mostly cloudy with a slight (20%) chance of rain late at night (under 0.10 in. of rain possible),
- Mostly cloudy and a bit warmer with a (30%) chance of rain (under 0.10 in. of rain possible) Monday (Columbus Day) and Monday night (under 0.10 in. of rain possible),
- Mostly cloudy with (30%) chance of AM rain, a slight (20%) chance of showers and a bit cooler Tuesday afternoon and at night.
- lows 46-50 cooling to 42 Tuesday night highs 67-65.
- Partly cloudy and a bit warmer Wednesday, mostly clear at night,
- Mostly sunny and a bit warmer Thursday, clear Thursday night,
- Then sunny and a bit warmer Friday and Saturday, clear Friday night.
- highs 67-73 lows 39-42. (seasonal averages high 71 low 47)
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Forecast for The South Oregon Coast Including Coos Bay and North Bend,
- Partly cloudy tonight,
- Mostly cloudy cloudy Sunday, mostly cloudy with a slight (20%) chance of rain late at night (under 0.10 in. of rain possible),
- Mostly cloudy with a (30%) chance of rain (under 0.10 in. of rain possible) Monday (Columbus Day) and Monday night (under 0.10 in. of rain possible),
- A slight (20%) chance of AM rain, mostly cloudy with a slight (20%) chance of showers Tuesday afternoon, then just partly cloudy and colder at night.
- lows 48-52 cooling back to 48 Tuesday night highs near 63.
- Partly cloudy Wednesday, mostly clear Wednesday night,
- Mostly sunny and a bit warmer Thursday, mostly clear at night,
- Sunny and a bit warmer Friday and Saturday, clear Friday night,
- highs 62-65 lows 46-48. (seasonal averages high 63 low 47)
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Forecast for the Cascades in Lane County:
- Partly cloudy with a slight (20%) chance of evening showers, just partly cloudy late tonight,
- Partly cloudy and a bit warmer with a slight (20%) chance of rain Sunday afternoon, becoming mostly cloudy with a slight (20%) chance of rain late Sunday night,
- Mostly cloudy and a bit cooler with a good (50%) chance of rain Monday (Columbus Day) and in the evening, rain likely (70%) chance late at night,
- A mix of clouds and sun and a bit cooler with a (40%) chance of showers Tuesday, then mostly cloudy with a slight (20%) chance of showers Tuesday night.
- snow level 5,500 ft. tonight, 7,500 ft. Sunday, above 8,000 ft. late Sunday night through Monday night, 7,000 ft. Tuesday, then 6,000 ft. Tuesday night.
- lows 33-40 cooling to 30 Tuesday night highs 50-44.
- Partly cloudy and a bit warmer Wednesday and Wednesday night,
- Mostly sunny and a bit warmer Thursday, Friday, and Saturday, mostly clear both nights,
- free air freezing level 8,000 ft. Wednesday and Wednesday night, 9,000 ft. Thursday, then 13,000 ft. Thursday night through Saturday.
- highs 47-59 lows 32-35.
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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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