Check out my latest Eugene Daily News Weather Or Not column:
http://eugenedailynews.com/2017/12/promise-promise-not-awh-forget/
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Here is my weekly weather quiz question for the last time. What are “Convective Clouds?” Here is the correct answer. Convective Clouds- the vertically developed family of clouds are cumulus and cumulonimbus. The height of their bases range from as low as 1,000 feet to a bit more than 10,000 feet. Clouds with extensive vertical development are positive indications of unstable air. Strong upward currents in vertically developed clouds can carry high concentrations of supercooled water to high levels where temperatures are quite cold. Upper portions of these clouds may be composed of water and ice. 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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Upper Level High Pressure (Shaded “Arch” shape with blue arrows) weakens its hold on us. An Upper Level Low Pressure Trough moves in to increase the rain chances. The graphics for days 1-3 show frontal activity through Tuesday. An Upper Level Low Pressure Trough takes control of our weather starting Tuesday. The graphics for days 3-7 show the next frontal systems heading our way Thursday through next Monday.
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Air Quality Index:
Eugene/Springfield: The Air Quality Index is 32 in the Good category measuring Particulate Matter.
Oakridge: The Air Quality Index is 43 in the Good category measuring Particulate Matter.
Cottage Grove: The Air Quality Index is 30 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: YELLOW – Caution is Advised.
*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:
- Mostly cloudy and a bit cooler with a (20%) chance of rain this evening (under 0.10 in. of rain possible), patchy fog late tonight and Monday AM, a (30%) of rain and a bit cooler Monday afternoon, rain likely (70%) at night (0.25 in. of rain possible) and Tuesday (0.25 in. of rain possible), cloudy with a slight (20%) chance of evening showers, rain late Tuesday night 0.10 in. of rain possible),
- Mostly cloudy and a bit cooler with rain and a bit warmer Wednesday, then rain likely (70%) at night.
- lows 34-39 highs 45-48.
- Cloudy and a bit warmer with rain Thursday, showers likely (70%) Thursday night,
- Mostly cloudy with a (40%) chance of showers and a bit cooler Friday, a slight (20%) chance of showers at night,
- Patchy AM fog, a mix of clouds and sun and bit cooler Saturday, partly cloudy Saturday night,
- Then a mix of clouds and sun and a bit warmer Sunday.
- highs 52-48 warming to 50 Sunday lows 39-35. (seasonal averages high 46 low 34)
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Forecast for Roseburg:
- Partly cloudy with a slight (20%) chance of rain this evening, just mostly cloudy late tonight,
- Mostly cloudy and a bit cooler with a good (50%) of rain Monday (under 0.10 in. of rain possible), rain at night (0.10 in. of rain possible),
- AM rain likely (70%) Tuesday AM, mostly cloudy with showers likely (70%) in the afternoon (0.10 in. of rain possible), cloudy with a good (50%) chance of evening showers, rain late Tuesday night (under 0.10 in. of rain possible),
- Cloudy with AM rain, then a good (50%) chance of rain and a bit warmer Wednesday afternoon and at night.
- lows 38-43 cooling to 40 Tuesday night warming to 42 Wednesday night highs 49-52.
- Mostly cloudy and a bit warmer with rain Thursday, a good (50%) chance of showers Thursday at night,
- Mostly cloudy with a slight (20%) chance of showers Friday, partly cloudy with patchy fog late Friday night,
- Areas of AM fog, partly cloudy and a bit cooler Saturday afternoon and at night,
- Then partly cloudy and a bit warmer Sunday.
- highs 55-53 lows 39-37. (seasonal averages high 49 low 36)
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Forecast for The South Oregon Coast Including Coos Bay and North Bend:
- Mostly cloudy with a slight (20%) chance of coastal rain late tonight with patchy fog late,
- Cloudy with a good (50%) chance of AM rain, rain likely (70%) and a bit cooler Monday afternoon (under 0.10 in. of rain possible), rain at night (0.25 in. of rain possible),
- Rain likely (60%) Tuesday AM, a good (50%) chance of showers and a bit warmer in the afternoon (under 0.10 in. of rain possible), a slight (20%) chance of evening showers, rain late Tuesday night (0.10 in. of rain possible) and Wednesday AM, then cloudy and a bit warmer with a good (50%) chance of rain in the afternoon and Wednesday night.
- lows 42-44 cooling back to 42 Wednesday night highs 52-54.
- Cloudy and a bit warmer with rain Thursday, mostly cloudy with a good (50%) chance of showers Thursday night,
- Mostly cloudy with a slight (20%) chance of showers Friday, mostly cloudy with patchy fog late at night,
- Areas of AM fog, just mostly cloudy Saturday and Saturday night,
- Then partly cloudy and a bit warmer Sunday.
- highs 57-59 lows 42-40. (seasonal averages high 51 low 40)
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Forecast for the Cascades in Lane County:
- Partly cloudy this evening, mostly cloudy and a bit cooler late tonight,
- Mostly cloudy with a slight (20%) chance of AM rain and snow, a bit cooler with a good (50%) chance of rain Monday afternoon (0.10 in. of rain possible), rain likely (70%) at night (0.25 in. of rain possible) and Tuesday, cloudy with a good (50%) chance of evening rain and snow showers, rain and snow late Tuesday night,
- Mostly cloudy and a bit cooler with rain and snow Wednesday, then mostly cloudy with a good (50%) chance of rain and snow Wednesday night.
- free air freezing level 9,000 ft. tonight, snow level 5,000 ft. rising to 7,000 ft. Monday afternoon, 7,500 ft. Monday night, 6,000 ft. Tuesday, 4,500 ft. falling to 3,500 ft. Tuesday night, 3,000 ft. rising to 4,500 ft. Wednesday, then 5,000 ft. Wednesday night.
- lows 28-32 cooling back to 28 Tuesday night and Wednesday night highs 39-36.
- Cloudy and a bit warmer with a rain Thursday, rain and snow showers likely (70%) Thursday night,
- Mostly cloudy with a (40%) chance of rain and snow showers Friday, just partly cloudy at night,
- Then partly cloudy and a bit warmer Saturday through Sunday.
- snow level 6,000 ft. Thursday, 5,000 ft, Thursday night, 4,500 ft. Friday, free air freezing level 8,000 ft Friday night, 10,000 ft. Saturday and Saturday night, then 11,000 ft. Sunday.
- highs 39-46 lows 28-32.
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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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